Preparing your tax return early gives you more time to organise records, check figures and plan for any tax due.

HMRC is encouraging taxpayers to start their 2025–26 Self Assessment returns ahead of the online filing and payment deadline of 31 January 2027.

Getting started early allows time to gather income details, review expenses and resolve missing information. It also provides a clearer picture of your tax position, helping you budget before payment is due.

You do not need to complete your online return in one sitting: progress can be saved and revisited. For those submitting a paper return, the deadline is earlier, on 31 October 2026.

Source: HM Revenue & Customs · 8 October 2026

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