VAT Schemes Explained: Flat Rate, Cash Accounting or Standard?

Choosing the right VAT scheme can save your limited company thousands of pounds each year. Yet many directors stick with whatever scheme their accountant set up years ago, never questioning whether it's still optimal. This guide compares the three main VAT schemes available to UK businesses.

Quick Answer: Which VAT Scheme Should You Choose?

Standard VAT Accounting is best if you have significant VAT-recoverable expenses, sell to VAT-registered businesses, or have turnover above £150,000.

Flat Rate Scheme suits service businesses with low costs - consultants, freelancers, and IT contractors. However, the limited cost trader rules (16.5%) have reduced its benefits significantly since 2017.

Cash Accounting Scheme works well for businesses with slow-paying clients or bad debt risk, as you only pay VAT when customers actually pay you.

Many businesses combine Cash Accounting with Standard VAT for the best of both worlds.

Comparing the Three Main VAT Schemes

Standard VAT Accounting Explained

Standard VAT accounting is the default scheme and the one HMRC automatically assigns when you register for VAT. You charge 20% VAT on your sales, reclaim VAT on your business purchases, and pay the difference to HMRC quarterly.

How Standard VAT Works

1. Charge VAT on sales - Add 20% VAT to all taxable supplies
2. Reclaim VAT on purchases - Deduct VAT paid on business expenses
3. Calculate the difference - Output VAT minus Input VAT = VAT liability
4. Pay quarterly - Submit return one month and seven days after quarter end

Example: A marketing agency invoices £10,000 plus £2,000 VAT. They spend £3,000 plus £600 VAT on software and professional fees. VAT liability is £2,000 - £600 = £1,400.

The Invoice Basis Problem

You owe HMRC the output VAT as soon as you issue an invoice - even if your customer hasn't paid. For businesses with 30-90 day payment terms, this creates significant cash flow pressure.

Pros and Cons

Advantages:

• Full input VAT recovery on all business expenses
• No turnover limits - scales with your business
• Can combine with Cash Accounting for better timing

Disadvantages:

• Pay VAT before customers pay you
• Bad debt risk (though reclaimable after 6 months)
• More complex record-keeping

Best For

Standard VAT Accounting works best for businesses that:

• Purchase significant VAT-rated goods or services (stock, equipment, subcontractors)
• Have turnover above the Flat Rate Scheme limit (£150,000)
• Operate with favourable payment terms (paid upfront or within 14 days)
• Want to reclaim VAT on capital expenditure and major purchases
• Plan to grow significantly beyond current turnover

Flat Rate Scheme Explained

The Flat Rate Scheme (FRS) simplifies VAT by paying a fixed percentage of gross turnover to HMRC. You still charge customers 20% VAT but don't track input VAT.

How the Flat Rate Scheme Works

1. Charge standard VAT - Invoice customers at 20% VAT as normal
2. Apply your flat rate percentage - Multiply VAT-inclusive turnover by your industry rate
3. Pay the result to HMRC - No input VAT calculations needed
4. Keep the difference - If your flat rate is lower than actual VAT costs

Example: An IT consultant invoices £100,000 plus £20,000 VAT (£120,000 gross). Their flat rate is 14.5%. They pay £17,400 to HMRC (14.5% x £120,000) and keep £2,600.

Flat Rate Percentages by Industry

First year discount: New VAT registrations get 1% off their flat rate for 12 months.

Limited Cost Trader Rules (16.5%)

Since April 2017, businesses spending little on goods must use the 16.5% rate. You're a limited cost trader if goods spending is:

• Less than 2% of VAT-inclusive turnover, OR
• Greater than 2% but less than £1,000 per year

What counts as goods: Physical products, materials, stationery over £500/year, business fuel.

What doesn't count: Services (software, rent, professional fees), capital expenditure over £2,000.

Example: A consultant with £120,000 gross turnover buys only £800 of equipment. Since £800 is under both 2% and £1,000, they're a limited cost trader at 16.5%, paying £19,800 instead of the industry rate.

At 16.5%, FRS often loses to Standard VAT - if you'd reclaim even £2,000 input VAT, Standard is better.

Pros and Cons

Advantages:

• Simplified record-keeping - no tracking input VAT
• Predictable VAT bills
• First year discount (1% reduction)
• Cash basis - pay VAT when paid

Disadvantages:

• Cannot reclaim input VAT (except capital assets over £2,000)
• Limited cost trader rate (16.5%) eliminates most benefits
• £150k turnover cap
• Cannot combine with other schemes

Best For

The Flat Rate Scheme works best for businesses that:

• Have turnover under £150,000
• Incur minimal VAT-rated expenses (mostly labour costs, exempt services)
• Are NOT limited cost traders (spend over 2% of turnover on goods)
• Value simplicity and predictability over optimisation
• Are newly VAT-registered (benefit from first year discount)

Reality check: Since the limited cost trader rules came in, far fewer businesses genuinely benefit from FRS. Most service-based limited companies will find Standard VAT (potentially with Cash Accounting) saves more money.

Cash Accounting Scheme Explained

Cash Accounting changes when you account for VAT - pay when customers pay you, reclaim when you pay suppliers. The calculation method stays the same as Standard VAT.

How Cash Accounting Works

1. Track payment dates - Record when payments are received and made
2. Calculate output VAT - Based on payments received in the quarter
3. Calculate input VAT - Based on payments made in the quarter
4. Pay the difference - Only on actual cash movements

Example: You invoice £60,000 plus £12,000 VAT in Q1. Customers pay £36,000 + £7,200 VAT during Q1. Expenses are £10,000 + £2,000 VAT (all paid).

• Standard VAT: Pay £12,000 - £2,000 = £10,000
• Cash Accounting: Pay £7,200 - £2,000 = £5,200

You pay £4,800 less in Q1 (the rest when customers pay).

Eligibility

• Turnover under £1.35 million to join
• Leave when turnover exceeds £1.6 million
• Must be up to date with VAT returns

Pros and Cons

Advantages:

• Only pay VAT when customers pay you
• Bad debt protection - no VAT on unpaid invoices
• Can combine with Standard VAT for full input recovery
• High turnover limit (£1.35m)

Disadvantages:

• Delayed VAT reclaim until you pay suppliers
• More complex records (must track payment dates)
• Cannot combine with Flat Rate Scheme

Best For

Cash Accounting suits businesses that:

• Have customers who pay slowly (30-90 day terms common in B2B)
• Experience occasional bad debts or write-offs
• Invoice large amounts with uncertain payment timing
• Want cash flow protection without sacrificing input VAT recovery
• Combine B2B and B2C sales with different payment patterns

Annual Accounting Scheme

Annual Accounting reduces filing from quarterly to annually. You submit one return per year and make advance payments based on last year's liability.

Key features:

• One return per year (due two months after VAT year ends)
• Advance payments: 9 monthly (10% each) or 3 quarterly (25% each)
• Eligibility: turnover under £1.35 million
• Can combine with Standard or Cash Accounting (not FRS)

Best for businesses with stable turnover wanting reduced admin. Growing businesses may overpay advances.

Decision Framework: Choosing Your Scheme

Step 1: Check Turnover

• Over £1.35m - Standard VAT only
• £150k - £1.35m - Standard or Cash Accounting
• Under £150k - All schemes available

Step 2: Assess Input VAT

Calculate annual VAT on expenses. If input VAT recovery exceeds the FRS saving, Standard VAT wins.

Quick test: For 14.5% flat rate, if input VAT exceeds 5.5% of net turnover, use Standard.

Step 3: Payment Terms

• Paid within 14 days - Standard VAT is fine
• 30-60 day terms - Consider Cash Accounting
• 90+ days or bad debt risk - Strongly consider Cash Accounting

Worked Examples

IT Contractor, £80,000 turnover:

• Expenses: £4,000 + £800 VAT
• FRS at 14.5%: £13,920 (14.5% x £96,000)
• Standard: £16,000 - £800 = £15,200
• But... only £500 goods = limited cost trader at 16.5%: £15,840
• Winner: Standard VAT (saves £640/year)

Marketing Agency, £200,000 turnover:

• Expenses: £78,000 + £15,600 VAT
• FRS unavailable (over £150k)
• Standard: £40,000 - £15,600 = £24,400
• Winner: Standard + Cash Accounting (same tax, better cash flow)

Consultant with equipment investment, £100,000 turnover:

• Expenses: Equipment £15,000, software £3,000, training £2,000 = £20,000 + £4,000 VAT
• FRS at 14% (management consultancy): Pay £16,800 (14% x £120,000)
• Standard VAT: Pay £20,000 - £4,000 = £16,000
• Winner: Standard VAT (saves £800/year)

How to Switch VAT Schemes

Joining Flat Rate Scheme

1. Check eligibility (under £150k turnover)
2. Apply online through VAT account
3. HMRC confirms start date
4. Claim outstanding input VAT on final standard return

Leaving Flat Rate Scheme

Must leave when turnover exceeds £230,000. Can leave voluntarily after 12 months.

Joining Cash Accounting

1. Check eligibility (under £1.35m, up to date)
2. No application needed - start using cash basis
3. Notify HMRC on next VAT return
4. Adjust records to track payment dates

Leaving Cash Accounting

Required when turnover exceeds £1.6m. Account for unpaid invoices (both issued and received) on transition.

Joining Annual Accounting

1. Apply online through your Government Gateway VAT account
2. HMRC confirms your start date and advance payment schedule
3. Set up direct debits for advance payments (monthly or quarterly)
4. Submit one VAT return at year-end instead of quarterly

MTD Implications for Each Scheme

Making Tax Digital applies to all VAT-registered businesses regardless of scheme.

Standard VAT: Full digital records of sales and purchases, quarterly submissions via MTD software.

Flat Rate Scheme: Simplified records (gross turnover only), but still requires MTD-compatible software.

Cash Accounting: Track payment dates digitally, same quarterly submission requirements.

Annual Accounting: Digital records year-round, one annual submission via MTD software.

All schemes require MTD-compatible software since April 2022. You cannot submit VAT returns through the HMRC portal anymore.

AccountsOS handles all VAT schemes automatically - tracking invoices, payments, and generating MTD-compliant returns. Use our VAT calculator to compare schemes.

Frequently Asked Questions

Can I use the Flat Rate Scheme with Making Tax Digital?

Yes. FRS is fully MTD-compatible. You need MTD software to submit returns, but the simplified calculations work within MTD requirements. Many businesses find FRS easier under MTD because there's less data to track.

What happens when switching from Flat Rate to Standard?

Calculate VAT using the standard method from your leave date. Start reclaiming input VAT immediately on new purchases, but cannot retrospectively claim VAT on items bought while on FRS.

Can I claim any input VAT on the Flat Rate Scheme?

Only on capital assets over £2,000 including VAT - vehicles, machinery, expensive equipment. The threshold applies per asset, not cumulative purchases.

How do I know if I'm a limited cost trader?

Calculate VAT-inclusive spending on goods (not services). If under 2% of turnover OR between 2% and £1,000, you're a limited cost trader at 16.5%. Most service businesses fall into this category.

Can I combine Cash Accounting with Flat Rate Scheme?

No. FRS already operates on a cash basis. For cash-based accounting with full input VAT recovery, use Standard VAT with Cash Accounting.

What VAT scheme is best for contractors?

If you're a limited cost trader (most contractors are), Standard VAT with Cash Accounting is usually best. Run the numbers for your specific situation.

How often can I change VAT schemes?

Leave FRS voluntarily after 12 months, or immediately if over threshold. Join/leave Cash Accounting anytime. Annual Accounting requires 12-month minimum. Annual reviews are sensible.

Does my VAT scheme affect Corporation Tax?

Not directly. However, paying more VAT than necessary on FRS reduces taxable profit. Keeping extra VAT under FRS increases taxable profit.

Next Steps: Optimising Your VAT Position

Choosing the right VAT scheme is one of the easiest ways to improve your limited company's cash flow and reduce admin burden. Here's your action plan:

1. Calculate your current position - Use our VAT calculator to compare schemes for your situation
2. Check limited cost trader status - If you're on FRS, verify you genuinely qualify for your industry rate
3. Consider Cash Accounting - If you have slow-paying clients, this could transform your cash flow
4. Ensure MTD compliance - Whatever scheme you choose, you need MTD-ready software
5. Review annually - As your business changes, so might the optimal scheme

The VAT threshold is £90,000, meaning growing businesses face these decisions as they scale. Getting your VAT scheme right from the start prevents costly mistakes later.

Need help managing your VAT? AccountsOS tracks your VAT liability, supports all UK schemes, and handles MTD submissions automatically. See how it works and start your free trial today.