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ISA timing

What should I do when the tax year ends?

Practical end-of-tax-year checklist for UK ISA investors, covering allowance checks, contribution records and decisions to review before the new tax year.

Published 5 August 2026 3 min read

The short answer

Review your ISA subscriptions for the year, check unused allowance, and decide whether to use any remaining allowance before the deadline. Also review your holdings and tax documents for the year for record-keeping.

Checklist at year-end

Confirm total subscribed to ISAs during the tax year. Decide whether to use remaining allowance. Reconcile paperwork and ensure records for dividends, purchases and sales are complete.

Shariah-compliance considerations

If you have purification tasks or need to document non-permissible income for the tax year, complete calculations and donations before finalising records. Keep clear records for future reference.

What this means in practice

  1. 1Check your ISA contribution totals and any remaining allowance for the year.
  2. 2Complete any purification calculations and document donations if relevant.
  3. 3Organise your annual investment statements and transaction records.

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