Final Declaration

A Final Declaration is the last step in your self-assessment journey. It confirms your total income, reliefs, and allowances across all sources—not just those reported through quarterly updates (like self-employment or property income), but also other income such as capital gains, pensions, and dividends.

The final declaration triggers HMRC’s final tax calculation and must be submitted by 31st January following the end of the tax year. It ensures all data is accurate and complete for the full tax year.

You can access your Final Declaration once all your quarterly updates have been filed. If applicable you will need to declare your additional income and make any required adjustments before submitting your Final Declaration.

When the Final Declaration form opens, you will first be prompted to generate a new final tax calculation. HMRC will then display your total income and calculate your Income Tax and National Insurance liability.

If you are satisfied that the income and tax calculation presented is correct, you can proceed to read and accept the declaration before submitting it to HMRC. Once HMRC receives your Final Declaration, the tax year will be crystallised, and a payment schedule will be generated for any outstanding tax you may owe.