General information only, not advice for your circumstances. Please talk to us before acting.
The deadline for filing your 2025/26 tax return online, and paying any tax due, is 31 January 2027. The same date is when the first payment on account for 2026/27 falls due.
What we will need from you
- Income from employment (your P60 and any P11D)
- Self-employed income and expenses, or rental income and costs
- Bank and building society interest, and dividends
- Pension contributions and Gift Aid donations
- Details of any assets you sold, such as property or shares
Why sending it early helps
Getting your papers to us by the end of November gives time to ask questions, find every allowable expense and relief, and tell you what to pay well before the deadline. If you file by 30 December, an underpayment of less than £3,000 can usually be collected through your tax code instead of in one payment.
Late filing
HMRC charges an automatic £100 penalty if the return is late, even if no tax is due, with further penalties and interest the longer it remains outstanding.
