🇮🇲Live in Isle of Man

Your AI CFO for Isle of Man.

Finn knows Income Tax Division (Treasury), Isle of Man Companies Registry and the GBP (£) — and runs your books, files your taxes, and handles the admin nobody owns. A finance hire for founders in Isle of Man.

Built for Isle of Man from day one

Tax Authority
Income Tax Division (Treasury)
Registry
Isle of Man Companies Registry
Currency
GBP (£)
Tax Year
6 April to 5 April (matches UK personal tax year)
Entity types supported: ltd_iom_1931, ltd_iom_2006, llc_iom, sole_trader_iom, partnership_iom, branch_iom, other. Tax IDs: IOM Company Number, VAT Registration Number, Tax Reference Number (TRN).

Key Isle of Man terms

View full glossary

Corporate Tax (Isle of Man)

The Isle of Man has a 0% standard rate of corporate income tax on most trading and investment profits. A 10% rate applies to income from banking business and retail businesses with taxable profits exceeding £500,000. A 20% rate applies to income from Isle of Man land and property.

VAT (Isle of Man)

Value Added Tax in the Isle of Man is administered by the Isle of Man Treasury and mirrors UK VAT law under the Customs and Excise Management Act 1986. The standard rate is 20%, reduced rate 5%, and zero rate applies to food, children's clothing and other categories identical to the UK.

Income Tax (Isle of Man)

Isle of Man income tax is charged at 10% on the first £6,500 of taxable income and 20% on income above that threshold. The Isle of Man has a generous personal allowance of £14,500 for residents. Married couples and civil partners may elect for joint assessment.

National Insurance (Isle of Man)

Isle of Man National Insurance contributions (NICs) are levied on employed and self-employed earners, broadly mirroring UK NIC structure but at different rates. For 2025/26 the employee Class 1 rate is 11% on earnings between £145 and £833 per week, with a lower rate above. Employer NICs are 13.6%.

Assessor of Income Tax

The Assessor of Income Tax is the Isle of Man government official responsible for administering income tax and corporate income tax on the island. The Assessor's Division handles tax returns, assessments, refunds, ITIP (PAYE equivalent) and enforcement. It is the equivalent of HMRC in the UK.

Isle of Man Treasury

The Isle of Man Treasury is the government department responsible for managing public finances, taxation policy, and economic planning on the island. It oversees the Assessor of Income Tax Division, Customs and Excise (including VAT), and the central banking function. It is broadly equivalent to HM Treasury combined with HMRC.

Can I claim it? Isle of Man expenses

All expenses

Home Office

Yes

Yes — Isle of Man companies and sole traders can claim a proportion of home costs (heat, light, broadband) where the home is used for business. Directors taking salary via ITIP can be reimbursed reasonable home-working expenses tax-free.

Business Travel

Yes

Yes — travel costs wholly and exclusively for business purposes are fully deductible. This includes flights, ferries, taxis, rail fares and accommodation on qualifying business trips. Commuting between home and a regular place of work is not deductible.

Professional Services (Accountant, Solicitor, Consultant)

Yes

Yes — fees for accountants, solicitors, registered agents and business consultants incurred for business purposes are fully deductible. Costs related to capital transactions (acquisition of assets, company formation) are capital in nature and not immediately deductible.

Technology and Software

Yes

Yes — subscription-based SaaS tools (accounting software, CRM, project management, cloud storage) are deductible revenue expenses. One-off software licence purchases may be capital — check whether the cost relates to an enduring asset or an ongoing service subscription.

Staff Salaries and Wages

Yes

Yes — salaries, wages, bonuses and employer National Insurance contributions paid to employees are fully deductible for corporate income tax purposes. There is no restriction on deductible payroll costs, provided they are commercially reasonable and paid for genuine services.

Telephone and Mobile

Partial

Partially — a business-only mobile or landline is fully deductible. If a phone has both personal and business use, only the business proportion is deductible. Many Isle of Man companies provide directors with a company mobile — the business cost is deductible but the personal use element may create a benefit in kind.

Isle of Man tax deadlines

All deadlines

Corporate Income Tax Return (Form 1A)

12 months after the end of the company's accounting period (e.g. a 31 December year-end company must file by 31 December the following year).

Annual income tax return for Isle of Man resident companies. Filed with the Assessor of Income Tax within 12 months of the company's accounting year-end. There is no separate corporation tax in the Isle of Man — company income is assessed under the Income Tax Act 1970.

VAT Return (Quarterly)

One calendar month after the end of the VAT quarter. Common quarter ends: 31 March, 30 June, 30 September, 31 December. Return and payment both due by the same date.

Quarterly VAT returns filed with the Isle of Man Treasury's Customs and Excise Division. Covers VAT collected on sales and VAT paid on purchases. Net VAT payable (or reclaimable) is settled with each return. Returns and payment are due one month after the end of each VAT quarter.

Personal Income Tax Return (Form IT1)

6 October following the end of the tax year (6 April to 5 April). Example: for the 2025/26 tax year (ending 5 April 2026), the return is due by 6 October 2026.

Annual Isle of Man income tax self-assessment return for resident individuals with income from employment, self-employment, property, investments or other sources. Filed with the Assessor of Income Tax. The return covers the tax year 6 April to 5 April, with a deadline of 6 October (6 months after year-end).

National Insurance Contributions — Employer Monthly Returns

Monthly return and payment due by the 19th of the month following the pay period. Example: ITIP and NICs for April payroll are due by 19 May.

Employers operating the Isle of Man ITIP (Income Tax Instalment Payments) system must submit monthly returns detailing employee earnings, income tax deducted and National Insurance contributions. Payments are due by the 19th of the following month.

Why founders in Isle of Man pick AccountsOS

Finn cites Income Tax Division (Treasury) and Isle of Man Companies Registry sources — never UK rules by mistake.
GBP (£) and DD/MM/YYYY dates everywhere — no manual conversion.
Local entity types (ltd_iom_1931, ltd_iom_2006, llc_iom…) supported out of the box.
One login for cross-border founders running multiple entities across countries.
Free for 14 days. Cancel any time.

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