Allowable Expenses for Limited Companies: The Complete UK List

Every pound your limited company spends on a legitimate business expense is a pound that does not get taxed at 25% Corporation Tax. For a company making £100,000 in profit, claiming an extra £5,000 in allowable expenses saves £1,250 in tax. Over a decade, the compounding effect of properly tracking expenses can be worth tens of thousands of pounds.

Yet most small company directors under-claim. They lose receipts, second-guess what qualifies, or simply do not know the full scope of what HMRC allows. This guide fixes that. It is the complete reference for every category of allowable expense available to UK limited companies, with the current rules for the 2025/26 tax year.

The Core HMRC Principle: Wholly and Exclusively

Before diving into specific categories, you need to understand the single rule that governs all business expense claims. HMRC's test, codified in Section 54 of the Corporation Tax Act 2009, states that an expense is deductible only if it is incurred wholly and exclusively for the purposes of the trade.

This means three things:

1. The expense must have a business purpose. A new laptop for your director who uses it solely for company work qualifies. A new television for the director's living room does not.

2. The purpose must be exclusive. If an expense has a dual purpose — part business, part personal — the entire expense is technically disallowed unless it can be apportioned. HMRC accepts apportionment for certain categories (mobile phones, home broadband, vehicles) but not for others (client entertainment, everyday clothing).

3. The test is about purpose, not effect. A company Christmas party benefits employees personally, but its purpose is staff welfare and motivation. That makes it allowable (within the £150 per head annual limit). The purpose of the expenditure is what matters, not any incidental personal benefit.

The Duality Test

The duality test catches expenses where HMRC argues that the spending serves two purposes simultaneously. The landmark case is Mallalieu v Drummond (1983), where a barrister tried to claim the cost of dark clothing required for court appearances. The House of Lords ruled that the clothing served two purposes — professional appearance and personal warmth/decency — and was therefore not deductible.

This matters because it means you cannot claim everyday clothing even if you only wear it for work. But you can claim protective clothing, branded uniforms, and costumes because their purpose is exclusively business-related.

Mixed-Use Expenses: Apportionment

For some categories, HMRC accepts that an expense can be split between business and personal use. The business portion is deductible; the personal portion is not.

Common examples where apportionment is accepted:

• Mobile phone bills — claim the business percentage of calls and data
• Home broadband — claim the business proportion if you work from home
• Vehicle costs — claim based on business mileage as a proportion of total mileage
• Premises used partly for business — claim the business proportion of rent, utilities, and council tax

The key is keeping records that support your apportionment. HMRC can challenge any split that looks unreasonable, so document your methodology.

Revenue Expenses vs Capital Expenditure

Before listing specific expense categories, there is a critical distinction every director must understand.

Revenue expenses are day-to-day running costs. They are deducted in full from your profits in the period they are incurred. Examples: rent, salaries, software subscriptions, stationery, travel.

Capital expenditure is spending on assets that provide value over multiple years. Examples: computers, vehicles, machinery, office furniture. Capital expenditure cannot be deducted directly from profits. Instead, you claim tax relief through capital allowances, which spread the deduction over time (or allow immediate write-off through the Annual Investment Allowance or full expensing).

The distinction matters because getting it wrong can trigger HMRC enquiries. If you claim a £15,000 piece of machinery as a revenue expense instead of processing it through capital allowances, your accounts are technically incorrect even if the tax outcome is similar.

For a full guide to capital allowances, see our capital allowances guide.

Type	Deduction method	Timing	Examples
Revenue expense	Deducted from profits directly	Period incurred	Rent, salaries, utilities, travel
Capital expenditure	Capital allowances (AIA, full expensing, WDA)	Over asset life or immediately via AIA	Computers, vehicles, machinery

---

Category 1: Office and Premises Costs

If your company operates from rented premises, a co-working space, or a home office, the associated costs are allowable expenses.

What You Can Claim

• Rent for offices, workshops, warehouses, retail units, or co-working desk space
• Business rates charged by your local authority
• Utilities — electricity, gas, water, heating oil
• Building insurance for the premises
• Cleaning and maintenance — cleaning services, waste disposal, window cleaning
• Repairs and maintenance — fixing a leaking roof, repainting walls, replacing broken windows, plumbing repairs
• Security — alarm systems, CCTV monitoring fees, security guards
• Contents insurance for office equipment and stock
• Service charges on leasehold premises
• Ground rent on leasehold premises
• Postage and courier costs
• Stationery — paper, pens, envelopes, printer ink, toner
• Printing costs — business cards, letterheads, invoices
• Office supplies — cleaning products, kitchen supplies for the office, toilet paper

What You Cannot Claim

• The cost of buying the property (this is capital expenditure — and buildings generally do not qualify for capital allowances except for integral features and fixtures)
• Improvements that enhance the premises beyond their original condition (e.g., building an extension, adding a new room). Improvements are capital expenditure. Repairs that restore the premises to their original condition are revenue expenses.
• Deposits on leases (though these may be recoverable when the lease ends)

The Repair vs Improvement Grey Area

The distinction between a repair (allowable) and an improvement (capital) catches many directors. HMRC's position:

• Replacing a broken single-glazed window with another single-glazed window = repair (allowable)
• Replacing single-glazed windows throughout with double-glazing = improvement (capital expenditure)
• Replacing a broken boiler with a modern equivalent = repair (allowable, even if the replacement is more efficient)
• Extending the kitchen in your office = improvement (capital)

The test is whether you are restoring the asset to its previous condition or making it better than it was. Like-for-like replacement using modern materials is accepted as a repair.

Working from Home

If a director works from home, the company can pay a flat-rate allowance or reimburse actual costs.

Flat rate method: The company pays the director £6 per week (£26 per month / £312 per year) tax-free with no receipts required. This is the simplest approach and is accepted by HMRC without question.

Actual cost method: Calculate the actual business proportion of household costs (mortgage interest or rent, council tax, electricity, gas, water, broadband). Divide by the number of rooms and multiply by the proportion of time the room is used for business. This method often yields significantly more than the flat rate — particularly if you have a dedicated home office.

For a detailed breakdown, see our guide to working from home expenses.

---

Category 2: Staff Costs

Staff costs are typically the largest expense category for limited companies with employees.

What You Can Claim

• Gross salaries and wages — including director salaries
• Employer National Insurance contributions (currently 15% above the secondary threshold of £5,000 for 2025/26)
• Employer pension contributions — these are fully deductible with no upper limit for Corporation Tax purposes, provided they pass the "wholly and exclusively" test
• Recruitment costs — job advertisements, recruitment agency fees, LinkedIn job postings
• Training and development — courses, conferences, CPD, professional qualifications related to the current trade
• Staff welfare — annual events up to £150 per head per year (Christmas party, summer event), staff canteen costs
• Trivial benefits — gifts to employees up to £50 each, as long as they are not cash, not a reward for performance, and not in the employee's contract. Directors of close companies have an annual cap of £300.
• Statutory payments — Statutory Sick Pay, Statutory Maternity/Paternity Pay (you may also reclaim some of these from HMRC)
• Temporary staff costs — agency workers, freelancers, subcontractors
• Employee travel — reimbursed business travel expenses
• Employer's liability insurance — legally required if you have employees
• Eye tests for employees who use display screen equipment (a legal requirement under DSE regulations)
• Work-related relocation costs up to £8,000 per employee

What You Cannot Claim

• Dividends — these are distributions of profit, not business expenses
• Personal expenses paid through the company on behalf of directors (these become benefits in kind and are taxable)
• Training unrelated to the trade — a marketing company cannot claim the cost of a director's wine-tasting course unless it is directly relevant to a client project

Director Salary Optimisation

For the 2025/26 tax year, the most tax-efficient director salary for a single-director company is typically £12,570 (the personal allowance threshold). This maximises the Corporation Tax deduction while avoiding income tax. If you want to build a State Pension qualifying year without paying any NIC, you can pay between £6,396 and £12,570. See our salary vs dividends guide for the full calculation.

---

Category 3: Travel and Subsistence

Business travel is fully deductible but is one of the most frequently disputed categories in HMRC enquiries. The rules are strict.

What You Can Claim

• Travel between business locations — e.g., from your office to a client's premises, or between two client sites
• Travel to temporary workplaces — if a director or employee works at a location for less than 24 months and it is not their permanent workplace
• Public transport fares — train, bus, Tube, tram, ferry tickets for business journeys
• Flights for business trips
• Taxis to and from business meetings, airports, or stations
• Hotels for overnight stays required by business travel
• Meals while travelling — subsistence costs during business trips away from the normal workplace
• Parking fees at business destinations
• Tolls and congestion charges on business journeys
• Mileage allowance for directors and employees using personal vehicles — see rates below

HMRC Approved Mileage Rates (2025/26)

Vehicle type	First 10,000 miles	Over 10,000 miles
Car or van	45p per mile	25p per mile
Motorcycle	24p per mile	24p per mile
Bicycle	20p per mile	20p per mile
Passenger supplement	5p per mile	5p per mile

If the company owns or leases the vehicle, you claim actual costs (fuel, insurance, servicing, road tax) instead of mileage rates. You cannot claim both.

What You Cannot Claim

• Ordinary commuting — travel between your home and your permanent workplace. This is HMRC's most enforced rule. If you are a director who works from the company's registered office every day, travelling there from home is not a business expense.
• Travel to a workplace you attend for more than 24 months — once a temporary workplace becomes permanent, the travel is ordinary commuting
• Excessive subsistence — HMRC expects reasonable costs. A £200 dinner for one person on a business trip will be questioned. There are no fixed limits, but the costs must be reasonable.
• Travel costs with a significant personal element — extending a business trip by three days for a holiday means only the business portion of travel is claimable

The Temporary Workplace Rule

This is critical for contractors and consultants. If you work at a client's site, the travel is deductible only if:

1. The engagement is expected to last less than 24 months, AND
2. You do not spend more than 40% of your working time there

If either condition fails, the client's site becomes your permanent workplace and travel to it is ordinary commuting. For directors of their own limited company, home is usually the permanent workplace if that is where most work happens — making travel to client sites and meetings deductible.

---

Category 4: Professional Services

Fees paid to professionals for business-related advice and services are allowable.

What You Can Claim

• Accountancy fees — annual accounts preparation, tax return filing, bookkeeping, payroll processing, VAT returns
• Legal fees for business matters — contract drafting, debt recovery, employment disputes, lease negotiations, regulatory compliance
• Tax advisory fees — Corporation Tax planning, personal tax advice related to the company
• Audit fees (if your company requires an audit)
• Consultancy fees — business strategy, IT consulting, HR consulting, management consulting
• Debt collection costs — fees paid to agencies to recover unpaid invoices
• Architect and surveyor fees related to business premises (revenue element only — not capital improvements)
• Patent, trademark, and copyright filing fees — these are revenue expenses when protecting existing intellectual property
• Company formation costs — although this is technically pre-trading expenditure, HMRC allows it as a deduction in the first accounting period
• Company secretarial services — Companies House filing, maintaining statutory registers, registered office services

What You Cannot Claim

• Legal fees for acquiring assets — the cost of conveyancing when buying a property is capital expenditure, not a revenue expense
• Legal fees for criminal proceedings against a director (unless the proceedings arise directly from the trade)
• Fines and penalties — parking fines, speeding tickets, HMRC penalties, and regulatory fines are never deductible, even if incurred while on business

The Fines Exception

This is absolute. No fine or penalty imposed by law is deductible for Corporation Tax purposes, regardless of the circumstances. If your delivery driver gets a parking ticket while delivering goods to a customer, the fine is still not allowable. The only exception is contractual penalties between businesses (e.g., late delivery penalties specified in a commercial contract), which are deductible.

---

Category 5: Marketing and Advertising

Expenditure on promoting your business is a revenue expense and fully deductible.

What You Can Claim

• Website design and development — the initial build and ongoing maintenance of your company website. Note: HMRC's position is that the initial website build is a revenue expense (unlike most software development), as a website is not a "tangible" asset. This is a favourable interpretation for small businesses.
• Search engine optimisation (SEO) services
• Pay-per-click advertising — Google Ads, Bing Ads
• Social media advertising — Facebook, Instagram, LinkedIn, TikTok, X (Twitter) ad spend
• Print advertising — newspapers, magazines, trade journals, flyers, leaflets
• PR and communications agency fees
• Branding and design — logo design, brand guidelines, marketing collateral
• Trade shows and exhibitions — stand costs, materials, travel to events
• Sponsorship — of events, sports teams, community organisations, industry awards (provided there is a genuine commercial purpose, not just the director's personal interest)
• Direct mail and email marketing — postage, design, email platform subscriptions (Mailchimp, Resend, etc.)
• Photography and video production for marketing purposes
• Business gifts — up to £50 per person per year, as long as the gift carries a conspicuous advertisement for the company and is not food, drink, or tobacco. The £50 threshold is strict: if a gift costs £50.01, the entire amount is disallowed.
• Free samples given to potential customers

What You Cannot Claim

• Sponsorship driven by personal interest — if a director sponsors their child's football team with no commercial return, HMRC can argue the purpose is personal
• Business gifts over £50 or gifts of food/drink/tobacco — these are disallowed regardless of value
• Political donations — never allowable for Corporation Tax

---

Category 6: Technology and Software

In the modern economy, technology costs form a significant portion of business expenditure.

What You Can Claim

• Software subscriptions — accounting software, project management tools, CRM systems, design tools, communication platforms. SaaS subscriptions are revenue expenses. See our guide to phone expenses for mobile-related claims.
• Cloud hosting — AWS, Google Cloud, Azure, Vercel, Netlify, Heroku
• Domain name registration and renewal
• SSL certificates
• Email hosting — Google Workspace, Microsoft 365
• Antivirus and security software
• Backup and disaster recovery services
• Internet and broadband at business premises (100% deductible if exclusively for business)
• IT support and maintenance contracts
• Bespoke software development — custom software built for your business operations. HMRC's treatment depends on whether the software is "in-house" (revenue expense) or a purchased licence (potentially capital). For most small companies using contractors to build custom tools, the cost is a revenue expense.
• API and data service fees — mapping APIs, payment processing, data feeds
• Hardware peripherals — keyboards, mice, monitors, webcams, headsets. Items under around £500 are typically treated as revenue expenses. More expensive items may need to go through capital allowances, though in practice most accountants treat sub-£1,000 peripherals as revenue.

What You Cannot Claim Directly (Capital Expenditure)

• Computers, laptops, servers — these are capital expenditure and are claimed through capital allowances (100% relief under AIA)
• Purchased software licences (perpetual licences, not subscriptions) — capital expenditure

The practical difference: a £120/year subscription to Adobe Creative Cloud is a revenue expense. A £5,000 one-off purchase of enterprise software is capital expenditure. Both are deductible, but through different mechanisms.

---

Category 7: Equipment and Capital Allowances

When your company buys assets with a useful life of more than one year, you claim tax relief through capital allowances rather than deducting the cost as a revenue expense.

Key Capital Allowance Rates (2025/26)

Allowance	Rate	Annual limit	What qualifies
Annual Investment Allowance (AIA)	100%	£1,000,000	Most plant and machinery
Full expensing	100%	No limit	New (not second-hand) plant and machinery
First Year Allowance — zero-emission cars	100%	No limit	New electric/zero-emission vehicles
Writing Down Allowance — main pool	18%	No limit	Assets not covered by AIA or full expensing
Writing Down Allowance — special rate	6%	No limit	Integral features, long-life assets, thermal insulation
50% First Year Allowance — special rate	50%	No limit	New special rate assets
Structures and Buildings Allowance	3%	No limit	New commercial buildings and structures

What Qualifies for Capital Allowances

• Computers and laptops
• Office furniture — desks, chairs, shelving, storage
• Machinery — manufacturing equipment, tools, specialist equipment
• Vehicles — cars, vans, trucks (different rules apply to cars vs commercial vehicles)
• Fixtures and fittings in business premises — lighting, heating systems, air conditioning
• Integral features — electrical systems, cold water systems, lifts, escalators
• Plant used in the business — broadly defined to include items that function as part of the business rather than the premises

What Does NOT Qualify

• Land — never qualifies for capital allowances
• Buildings — the structure itself does not qualify (though the Structures and Buildings Allowance at 3% was introduced in 2018)
• Cars with CO2 emissions over 50g/km — these go into the special rate pool at 6% WDA instead of qualifying for AIA or full expensing

For a comprehensive breakdown, see our capital allowances guide.

Worked Example: Capital Allowances vs Revenue Expenses

Your company buys the following in the 2025/26 tax year:

Item	Cost	Treatment
MacBook Pro	£2,499	Capital — AIA (100% relief)
Standing desk	£699	Capital — AIA (100% relief)
Monitor arm	£85	Revenue expense
Annual Slack subscription	£130	Revenue expense
Printer paper (year's supply)	£120	Revenue expense
Total	£3,533

Corporation Tax saving at 25%: £883.25

Both revenue expenses and AIA-eligible capital expenditure give you 100% relief in the year of purchase. The difference is accounting treatment, not tax outcome.

---

Category 8: Financial Costs

The cost of funding and managing your company's finances is deductible.

What You Can Claim

• Bank account charges — monthly fees, transaction fees, chargeback fees
• Credit card processing fees — Stripe, PayPal, Square, SumUp, Revolut Business transaction fees
• Overdraft interest
• Loan interest — on loans taken out for business purposes. The interest is deductible; the capital repayment is not.
• Hire purchase interest — the interest element of HP agreements on business assets
• Lease payments — operating lease payments on equipment, vehicles (subject to CO2 restrictions for cars), and premises
• Bad debts — debts that you have genuinely written off as uncollectable. You must have made reasonable efforts to collect the debt and formally written it off in your accounts. General "provisions" for possible future bad debts are not deductible.
• Currency exchange losses — if your company trades internationally and suffers losses on currency conversion
• Credit reference and fraud prevention fees
• Factoring and invoice finance charges

What You Cannot Claim

• Loan capital repayments — only the interest is deductible, not the principal
• Dividends paid — these are profit distributions, not expenses
• Fines for late payment to HMRC — statutory penalties are never deductible
• Interest on loans used for non-business purposes — if a director borrows through the company for personal reasons, the interest is not deductible and there are additional tax consequences (Section 455 charge on overdrawn director's loan accounts)

The Bad Debt Claim

To claim a bad debt deduction, you need:

1. A genuine trade debt (you sold goods or services and were not paid)
2. Evidence that the debt is irrecoverable (reminders sent, debtor insolvent, debt collector exhausted options)
3. The debt formally written off in your accounts in the period you claim the deduction

You cannot claim a "general provision" (e.g., "5% of our debtors will probably not pay"). Only specific debts that have been identified and written off qualify.

---

Category 9: Insurance

Insurance premiums paid to protect the business are deductible.

What You Can Claim

• Professional indemnity insurance — essential for consultants, agencies, and professional service firms
• Public liability insurance — covers injury to third parties or damage to their property
• Employers' liability insurance — legally required if you have employees (including directors employed under a contract of service)
• Directors' and officers' (D&O) insurance — covers personal liability of directors
• Business contents insurance — protects office equipment, stock, and fixtures
• Business interruption insurance — covers lost income if your business cannot trade due to an insured event
• Cyber liability insurance — increasingly important for technology companies
• Key person insurance — if the company is the policyholder and beneficiary, premiums are deductible. If the policy is for the director's personal benefit, it is a benefit in kind.
• Commercial vehicle insurance — for company-owned vehicles
• Trade credit insurance — protects against customer non-payment
• Product liability insurance — for companies that manufacture or sell physical goods
• Engineering and machinery insurance

For a full breakdown, see our business insurance guide.

What You Cannot Claim

• Personal insurance policies — life insurance, health insurance, or income protection taken out in a director's personal name are not company expenses
• Private medical insurance for directors — this is an allowable expense for the company, but it is a taxable benefit in kind for the director. The company gets Corporation Tax relief, but the director pays income tax on the value of the benefit.

---

Category 10: Client Entertainment

This is the most misunderstood expense category. The rules are counterintuitive.

The Rule

Client entertainment is NOT deductible for Corporation Tax purposes. It does not matter how clear the business purpose is. Taking a client for a £50 lunch to discuss a contract renewal? Not deductible. Hospitality at a sporting event for prospective clients? Not deductible. This is a specific statutory disallowance under Section 1298 of the Corporation Tax Act 2009.

What Counts as Entertainment

• Meals with clients or prospective clients
• Drinks with clients
• Tickets to events (sporting, cultural, concerts) provided to clients
• Hospitality boxes
• Christmas gifts to clients that are food, drink, or tobacco (or exceed £50 / are not promotional)

The VAT Exception

Here is where it gets counterintuitive. While client entertainment is not deductible for Corporation Tax, you can recover the VAT on entertainment of overseas customers (not UK customers). This is an unusual split where the CT and VAT treatments differ.

For UK customer entertainment: no CT deduction, no VAT recovery. For overseas customer entertainment: no CT deduction, but VAT is recoverable.

Staff Entertainment Is Different

Entertaining your own employees IS deductible. The annual staff party/event exemption allows up to £150 per head per year across all annual events. This is not a tax-free "allowance" — it is an exemption threshold. If you spend £151 per head, the entire £151 is taxable, not just the £1 excess.

---

Category 11: Clothing and Uniforms

Clothing is one of the most restricted categories due to the Mallalieu v Drummond duality test.

What You Can Claim

• Protective clothing — hi-vis jackets, safety boots, hard hats, gloves, goggles, lab coats
• Branded uniforms — clothing with the company logo that is not suitable for everyday wear. A polo shirt with your company logo embroidered on it qualifies.
• Costumes — clothing required for a specific role (e.g., a magician's stage outfit)
• Laundry costs for qualifying work clothing — £60 per year flat rate for employees, or actual costs

What You Cannot Claim

• Everyday business clothing — suits, shirts, ties, dresses, shoes, even if you only wear them for work. The duality test means that because the clothing also serves the purpose of warmth and decency, it has a dual purpose and fails the "wholly and exclusively" test.
• Smart casual clothing for client meetings
• Business accessories — watches, handbags, briefcases (unless they contain specialist equipment)

The Branded Uniform Approach

Many directors get around this restriction by having their company logo embroidered on polo shirts, jackets, or other clothing. Once the logo is prominent and the clothing is clearly not suitable for everyday personal wear (e.g., a branded high-vis gilet, a polo shirt with a large company logo), it becomes a uniform and qualifies.

---

Category 12: Vehicle Costs

Vehicle expenses depend on whether the company owns the vehicle or the director uses a personal vehicle for business.

Option A: Company Car

If the company buys or leases the vehicle, you can claim:

• Purchase cost — via capital allowances (100% FYA for zero-emission vehicles, AIA for vans, 18% or 6% WDA for cars depending on CO2 emissions)
• Fuel — for business mileage
• Insurance, road tax, MOT
• Servicing and repairs
• Breakdown cover
• Lease payments — for leased vehicles (15% of the lease payment is disallowed for cars with CO2 emissions over 50g/km)

However, a company car creates a benefit in kind (BIK) for the director, taxable at a percentage of the car's list price. For petrol/diesel cars, this can be significant (up to 37% of list price). For electric vehicles, the BIK rate is just 2% for 2024/25 and 3% for 2025/26, making EVs extremely tax-efficient as company cars.

For a detailed comparison, see our company car vs mileage allowance guide.

Option B: Mileage Allowance (Personal Vehicle)

If the director uses their own car and the company reimburses at HMRC approved rates:

• No BIK for the director
• The mileage payment is a deductible expense for the company
• Simpler to administer — no fleet management, insurance, or maintenance

Journey type	Rate (first 10,000 miles)	Rate (over 10,000 miles)
Car/van	45p/mile	25p/mile
Motorcycle	24p/mile	24p/mile
Bicycle	20p/mile	20p/mile

Which Is Better?

For most single-director micro-companies, the mileage allowance on a personal vehicle is simpler and often more tax-efficient — unless you drive an electric vehicle, in which case the 3% BIK rate on a company EV is extremely favourable. See our electric car through a limited company guide for the full comparison.

---

Category 13: Research and Development

The UK R&D tax relief regime offers enhanced deductions or cash credits for qualifying research and development expenditure.

What Qualifies

R&D must seek to achieve an advance in science or technology by resolving scientific or technological uncertainty. The work must not be readily deducible by a competent professional in the field.

Qualifying costs include:

• Staff costs — salaries, NIC, pension contributions of employees directly involved in R&D
• Subcontractor costs — payments to third parties for R&D work (restricted percentages apply)
• Software used directly in R&D
• Consumable items — materials, utilities, and items consumed or transformed in R&D
• Cloud computing costs — for R&D computation and data processing (from April 2023)

Current Relief (Merged Scheme, from April 2024)

From April 2024, the SME and RDEC schemes merged into a single scheme:

• 20% above-the-line credit for all companies (effectively an enhanced deduction of 186% of qualifying costs)
• R&D intensive SMEs (R&D expenditure exceeds 30% of total expenditure) can claim enhanced payable credit at a higher rate
• Claims must be made within two years of the end of the accounting period

What Does NOT Qualify

• Work in the arts, humanities, or social sciences
• Market research or customer surveys
• Routine testing or quality control
• Cosmetic changes or minor modifications
• Work where the solution is already known in the field

R&D claims are complex. Most companies should use a specialist R&D tax advisor. The cost of the advisor is itself a deductible expense.

---

Category 14: Subscriptions and Memberships

What You Can Claim

• Professional body memberships — ICAEW, ACCA, CIMA, RICS, Law Society, BCS, IET, and any other professional body relevant to your trade. HMRC maintains a list of approved professional bodies (List 3) but in practice any membership relevant to the trade is deductible.
• Trade association memberships — Federation of Small Businesses (FSB), Chamber of Commerce, industry-specific trade bodies
• Technical journals and publications — subscriptions to industry publications, journals, and databases
• Reference books and materials — purchased for the purposes of the trade
• Learned society memberships — if relevant to the trade

What You Cannot Claim

• Political party memberships — never deductible
• Social club memberships — gym, golf club, social club, unless the club is directly related to the trade (extremely rare)
• Subscriptions with a significant personal element — if the primary benefit is personal enjoyment rather than business advancement

The Golf Club Question

Directors frequently ask about golf club memberships used for client networking. The answer is almost always no. HMRC treats this as having a dual purpose (personal recreation and business networking). Even if you only play golf with clients, the membership itself provides personal recreational access and fails the duality test.

---

Category 15: Telephone and Communications

What You Can Claim

• Business mobile phone contract — if the company provides a phone to a director/employee and the contract is in the company's name, the entire cost is deductible AND there is no benefit in kind for the user (one phone per employee, under the mobile phone exemption)
• Business landline at company premises — 100% deductible
• VoIP and communication services — Zoom, Teams, Google Meet subscriptions
• Internet at business premises — 100% deductible
• Home broadband — business proportion if working from home
• Personal mobile phone — only the business proportion of calls and data if using a personal phone for business

For more on mobile phone expenses, see our phone expense guide.

---

Category 16: Miscellaneous Deductible Expenses

Several expenses do not fit neatly into the categories above but are nonetheless deductible.

• Staff refreshments — tea, coffee, milk, biscuits, and other refreshments provided in the workplace for staff. This is an allowable expense and is not a benefit in kind. Providing coffee for your team is a legitimate business expense.
• Charitable donations — to registered UK charities. Companies can deduct qualifying charitable donations from their total profits. The donation must be to a registered charity and must be voluntary (not for a service rendered). Gift Aid on corporate donations is automatic.
• Relocation costs — up to £8,000 per employee for work-related relocation
• Removal of trade waste
• Incidental overnight expenses — up to £5 per night in the UK, £10 per night overseas, for personal incidental expenses while on business trips (laundry, private calls)
• Pre-trading expenditure — expenses incurred in the 7 years before the company starts trading are treated as if incurred on the first day of trading, provided they would have been deductible had the company been trading at the time
• Cost of raising finance — arrangement fees on business loans, not the loan capital itself
• Patent box regime — if your company earns income from patented inventions, you can elect for a 10% Corporation Tax rate on qualifying profits (separate from the R&D regime)

---

Worked Examples: How Expenses Reduce Your Tax Bill

Example 1: Freelance Software Developer (Single Director)

Sarah runs a software development consultancy through her limited company. Annual revenue: £95,000.

Expense	Annual cost
Director salary	£12,570
Employer NIC (on salary above £5,000)	£1,135
Employer pension contribution	£6,000
Co-working desk (hot desk)	£2,400
Software subscriptions (JetBrains, GitHub, AWS)	£1,200
Accountancy fees	£1,200
Professional body membership (BCS)	£160
Home broadband (50% business)	£240
Business mobile phone	£360
Travel to client sites (3,000 miles at 45p)	£1,350
Training courses (React conference)	£800
Business insurance (PI + PL)	£450
Total expenses	£27,865

Taxable profit: £95,000 - £27,865 = £67,135

Corporation Tax at 25%: £16,783.75

Tax saved by claiming expenses: £27,865 x 25% = £6,966.25

Without claiming expenses beyond salary, Sarah would pay £20,607.50 in Corporation Tax. Proper expense tracking saves her almost £7,000.

Example 2: Marketing Agency (3 Staff)

Tom runs a marketing agency with two employees and himself as director.

Expense	Annual cost
Director salary	£50,000
2 employee salaries	£70,000
Employer NIC (all staff)	£14,700
Employer pension contributions (5%)	£6,000
Office rent (serviced office)	£18,000
Software (Adobe, HubSpot, Slack, Figma)	£8,400
Accountancy and legal	£4,800
Client travel (trains, hotels)	£5,200
Marketing own business (Google Ads, events)	£6,000
Equipment (3 x MacBook Pro via AIA)	£7,500
Employers' liability insurance	£400
PI and PL insurance	£1,800
Staff Christmas party (£100 x 3 people)	£300
Trivial benefits (gift vouchers, 3 x £200)	£600
Total expenses	£193,700

On £280,000 revenue, taxable profit = £86,300. Corporation Tax = £21,575.

Expenses saved: £193,700 x 25% = £48,425 in Corporation Tax.

Example 3: The Electric Vehicle Advantage

Claire is deciding between a mileage allowance and a company electric car. She drives 12,000 business miles per year.

Option A: Mileage allowance on personal car

• 10,000 miles x 45p = £4,500
• 2,000 miles x 25p = £500
• Total claim: £5,000
• CT saving: £1,250
• No BIK for Claire

Option B: Company leases a Tesla Model 3 (list price £40,000)

• Annual lease: £5,400
• Insurance, charging, servicing: £1,800
• Total company cost: £7,200
• CT saving: £1,800
• BIK on Claire: 3% x £40,000 = £1,200. At 40% tax rate = £480 income tax
• Net benefit vs mileage: £550 per year better, plus she drives a new Tesla

The EV company car route is often superior for directors doing moderate-to-high mileage.

Example 4: R&D Tax Relief for a Tech Startup

DataCo Ltd spends £120,000 on developer salaries working on a novel machine learning algorithm. They also spend £15,000 on cloud computing for training models.

Under the merged R&D scheme (from April 2024):

• Qualifying expenditure: £135,000
• Enhanced deduction: £135,000 x 186% = £251,100 deduction
• Additional deduction beyond normal cost: £116,100
• CT saving on the additional deduction: £116,100 x 25% = £29,025

If DataCo is loss-making and R&D intensive, it can claim a payable tax credit instead, providing a cash injection even when the company is not yet profitable.

---

Common Mistakes That Trigger HMRC Enquiries

Avoid these errors when claiming expenses:

1. Claiming personal expenses through the company. The single most common trigger. If you buy groceries, personal clothing, or holiday flights through the company, HMRC will reclassify them as benefits in kind or director's loan debits.

2. No receipts or records. HMRC requires you to keep records for 6 years. If you claim £5,000 in travel but have no mileage log, the claim can be disallowed entirely.

3. Claiming client entertainment as "marketing." HMRC knows this trick. A meal with a client is entertainment regardless of what you call it in your accounts.

4. Overclaiming home office costs. If you claim 50% of your household bills but only use one room out of six for business, HMRC will challenge the proportion.

5. Claiming the full cost of mixed-use assets. A laptop used 50% for business and 50% for personal use is only 50% deductible. But if the company provides it to an employee under the "provision of a computer" exemption (now less favourable since April 2006), the rules differ.

6. Not distinguishing capital from revenue. Claiming a £30,000 vehicle as a revenue expense in your P&L instead of processing it through capital allowances will flag your accounts.

7. Claiming pre-trading expenses outside the 7-year window. Expenses incurred more than 7 years before the company starts trading are not deductible.

---

Record-Keeping Requirements

HMRC requires limited companies to keep accounting records for 6 years from the end of the accounting period they relate to. This includes:

• Receipts and invoices for all purchases
• Bank statements
• Mileage logs (date, destination, purpose, miles)
• Records of business vs personal use for mixed-use expenses
• Employment records and payroll data
• VAT records (if VAT registered)

Digital records are accepted. You do not need paper originals. A photograph or scan of a receipt is sufficient, provided it is legible and the details are clear.

For help organising your records, AccountsOS lets you upload receipts and documents, auto-categorise expenses, and keep a complete audit trail — all in one place.

---

Expenses and VAT: A Brief Note

If your company is VAT registered, you can recover VAT (input tax) on most business expenses. The rules largely mirror the Corporation Tax rules with a few important differences:

• Client entertainment of UK customers — no VAT recovery (matching the CT treatment)
• Client entertainment of overseas customers — VAT IS recoverable (unlike CT)
• Company cars — VAT is only recoverable on cars used 100% for business. Any private use blocks the entire VAT claim. Vans and commercial vehicles do not have this restriction.
• Fuel for private use — if you claim VAT on fuel and there is any private use, you must apply the fuel scale charge

The VAT position on expenses is a topic in its own right. If you are VAT registered, ensure your accounting system tracks the VAT element of every purchase. For more on VAT schemes and how they interact with expense claims, see our VAT schemes comparison.

---

Frequently Asked Questions

Can I claim expenses without receipts?

Technically, HMRC requires receipts or evidence for all claims. In practice, you can use bank or credit card statements as supporting evidence if a receipt is lost, particularly for small or regular payments like parking meters or contactless transport fares. However, relying on this regularly weakens your position in an HMRC enquiry. Always try to capture receipts at the time of purchase. A photo on your phone is sufficient.

What is the difference between allowable expenses and capital allowances?

Allowable expenses (also called revenue expenses) are day-to-day running costs deducted directly from your profits in the period incurred. Capital allowances are the mechanism for claiming tax relief on capital expenditure — assets with a useful life of more than one year, such as computers, vehicles, and machinery. Both reduce your Corporation Tax bill, but they are accounted for differently. Revenue expenses go through your profit and loss account. Capital expenditure goes on the balance sheet as an asset, and the capital allowance is claimed on your Corporation Tax return.

Can my limited company claim for my home office?

Yes. The simplest method is the flat-rate allowance of £6 per week (£312 per year), which requires no receipts. Alternatively, calculate the actual business proportion of household costs — mortgage interest or rent, council tax, electricity, gas, water, insurance, and broadband — based on the number of rooms and hours used. The company pays this to you as a tax-free reimbursement.

Is client entertainment ever deductible?

Not for Corporation Tax purposes. Client entertainment is specifically disallowed by HMRC, regardless of how clear the business purpose is. However, staff entertainment is deductible up to £150 per head per year for annual events. And if you entertain overseas customers (not UK-based), you can recover the VAT even though the CT deduction is blocked.

Can I claim the cost of a suit or business clothing?

No. Everyday clothing — including suits, shirts, ties, and smart shoes — is not deductible, even if you only wear it for work. The Mallalieu v Drummond duality test means clothing that serves both business and personal purposes (warmth, decency) is disallowed. You can claim branded uniforms, protective clothing, and costumes.

What happens if I claim an expense HMRC disallows?

If HMRC opens an enquiry and disallows an expense, the expense is added back to your taxable profit and you pay the additional Corporation Tax plus interest. If HMRC believes the claim was careless, the penalty is 0-30% of the additional tax due. If deliberate, the penalty is 20-70%. If deliberate and concealed, 30-100%. Innocent errors with reasonable care taken typically incur no penalty, just the additional tax and interest.

Can I backdate expense claims?

You can include legitimate expenses in your Corporation Tax return for the accounting period in which they were incurred, provided you have evidence. You cannot amend a Corporation Tax return more than 12 months after the filing deadline. If you discover missed expenses for a prior period, speak to your accountant about amending the return if still within the 12-month window, or carrying forward any losses if applicable.

Are company pension contributions an expense?

Yes. Employer pension contributions are a fully deductible expense for Corporation Tax purposes with no upper limit. They are also not subject to employer NIC. This makes pension contributions one of the most tax-efficient ways to extract money from a company — the company gets CT relief, and the director receives the pension contribution without income tax or NIC (within the annual allowance of £60,000 for 2025/26). See our pension contributions guide.

Do I need to keep physical receipts?

No. HMRC accepts digital records. A photograph or scan of a receipt is sufficient, provided it clearly shows the date, supplier, amount, and VAT (if applicable). Most accounting software, including AccountsOS, lets you photograph and upload receipts directly from your phone. The key requirement is that records are legible and retained for 6 years.

Can I claim expenses from before the company was incorporated?

Yes. Pre-trading expenditure incurred within 7 years before the company starts trading is treated as if it were incurred on the first day of trading. This covers company formation costs, initial equipment purchases, market research, website development, and professional advice obtained before the company began operating. Keep all receipts from the pre-incorporation period.

---

Summary: The Complete Expense Categories at a Glance

Category	Deductible?	Notes
Office rent and utilities	Yes	Revenue expense
Staff salaries and employer NIC	Yes	Revenue expense
Employer pension contributions	Yes	No upper limit for CT
Business travel	Yes	Not ordinary commuting
Mileage (personal car)	Yes	45p/25p per mile
Professional fees (accountant, solicitor)	Yes	Revenue expense
Marketing and advertising	Yes	Revenue expense
Software subscriptions	Yes	Revenue expense
Equipment (computers, furniture)	Yes	Via capital allowances
Bank charges and loan interest	Yes	Interest only, not capital
Business insurance	Yes	Revenue expense
Client entertainment	No	Statutory disallowance
Everyday business clothing	No	Duality test
Branded uniforms and protective clothing	Yes	Must be clearly work-only
Company vehicle costs	Yes	BIK applies to cars
R&D expenditure	Yes	Enhanced relief available
Professional subscriptions	Yes	Must be trade-relevant
Charitable donations	Yes	To registered UK charities
Fines and penalties	No	Never deductible
Political donations	No	Never deductible

---

Every expense you legitimately claim reduces your Corporation Tax bill by 25p for every pound spent. Over the lifetime of your company, disciplined expense tracking and claiming is worth tens of thousands of pounds.

The key principles are simple: the expense must be wholly and exclusively for business. Keep records. Know the difference between revenue and capital. And do not try to claim client entertainment or personal clothing — HMRC has heard every argument.

For help tracking, categorising, and claiming your business expenses automatically, try AccountsOS free during Early Access. Upload receipts, ask questions in plain English, and know your books are in order.