Tax filing deadlines: Mar to Sep 2025

Essential tax deadlines at a glance including corporation tax return due for year ends 31 March 2024

March

1 March

Corporation tax due for accounting periods ended 31 May 2024 where not payable by instalments

HMRC reviews advisory fuel rates for company cars

7 March

VAT returns and payments due for month or quarter ended 31 January 2025

14 March

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Tax | Tax filing deadlines: May – Sep 2026

Tax | Tax filing deadlines: Apr – Sep 2026

Tax | Tax filing deadlines: Sep to Dec 2025