Isle of Man Tax & Filing Deadlines

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.

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.

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).

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.

Isle of Man companies incorporated under the Companies Acts must file an Annual Confirmation Statement (formerly Annual Return) with the Isle of Man Companies Registry each year, confirming current company details including directors, shareholders, registered address, and company type.

Isle of Man tax-resident companies that carry on a 'relevant activity' (banking, insurance, shipping, fund management, finance and leasing, headquarters, holding company, IP, distribution and service centre) must file an annual substance declaration with the Assessor of Income Tax alongside their corporate tax return.

Annual reconciliation of Isle of Man Income Tax Instalment Payments (ITIP) and National Insurance contributions deducted by employers throughout the tax year. Filed with the Assessor of Income Tax within 3 months of the tax year-end (5 April), giving a deadline of 5 July.