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What are my filing dates for a year ending 31 December 2026?
The Companies House and Corporation Tax dates for a year ending 31 December 2026, with the weekday and what happens if you miss each one.
Deadlines and penalties
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Dated articles on what has changed, what is due, and how the rules work in practice, each linked to the standing answer in Taxpedia.
These pages explain the rules in general terms. They are not advice about your company's own figures. When something here matters to a decision, check the official source we link to.