April 2026 is one of the most important months in the UK tax calendar. From Corporation Tax payments and VAT returns to the start of Making Tax Digital for Income Tax and sweeping changes to Inheritance Tax reliefs, there is a lot to stay on top of. This guide covers every key deadline and new measure, with add-to-calendar links for each date.

March 2026 is packed with important UK tax deadlines, including Corporation Tax payments, VAT returns, PAYE, CIS and ATED obligations. Here’s your complete guide to the key accounting dates and what they mean for your business.

Running a side hustle in the UK? This practical guide explains when you need to file a Self Assessment tax return, how the £1,000 trading allowance works, what expenses you can claim, key deadlines, and the mistakes that catch people out. Clear, up to date, and written for real side hustlers juggling tax with a full-time job.