UK tax deadlines 2027: your own calendar with reminders
Short answer
The big ones: 31 January 2027 (2025 to 2026 Self Assessment return, the tax still owed and the first payment on account), 7 February 2027 (MTD update if you joined in April 2026), 31 July 2027 (second payment on account) and, for a company, 9 months after the year end (accounts and Corporation Tax). Pick your situation below for your own list, then subscribe so your calendar reminds you 7 days and 1 day before.
Your deadlines
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Put them in your calendar
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| Date | What | Where | If late | Time it takes (our estimate) | Source |
|---|
The big UK dates, November 2026 to April 2027
| Date | What | Who |
|---|---|---|
| 30 December 2026 | File online by today to have up to £3,000 collected through your PAYE tax code | Self Assessment with PAYE income |
| Sunday 31 January 2027 | 2025 to 2026 return online, balancing payment, first payment on account for 2026 to 2027 | Everyone in Self Assessment, also those in MTD since April 2026 |
| 7 February 2027 | MTD update for 6 April 2026 to 5 January 2027 | In MTD since April 2026 |
| 7 of the second month after each VAT period | VAT return and payment | VAT registered |
| 9 months and 1 day after the year end | Pay Corporation Tax | Limited companies |
| 9 months after the year end | Accounts to Companies House | Limited companies |
| 6 April 2027 | MTD for Income Tax starts | Self-employment and rent before expenses over £30,000 in 2025 to 2026 |
31 January 2027 is a Sunday. GOV.UK gives the date without moving it, and for VAT HMRC says so outright: return and payment are due on the date "even if it's on a weekend or bank holiday" (GOV.UK). Pay earlier if your bank needs working days.
Worked example: one person, three kinds of deadline
Alex is a sole trader in MTD since April 2026, VAT registered with quarters to March, June, September and December, and also runs a small company with a 31 March year end. Seen on 5 November 2026, Alex's next dates are:
- 7 November 2026: VAT for the quarter to 30 September and the MTD update to 5 October. Two filings on one day.
- 31 December 2026: company accounts for the year to 31 March 2026 to Companies House. 1 January 2027: Corporation Tax for that year.
- 31 January 2027: 2025 to 2026 Self Assessment return and tax, plus the first payment on account.
- 7 February 2027: VAT to 31 December and the MTD update to 5 January.
- 31 March 2027: Company Tax Return (CT600) for the year to 31 March 2026.
- 7 May 2027: VAT to 31 March and the fourth MTD update. Then 31 July, the second payment on account.
The 7th of February, May, August and November is where MTD and quarterly VAT collide. Close the books for both at once.
Missed one?
- Self Assessment: the 31 January worked example has the penalties, old and new.
- First bill bigger than expected: why the first Self Assessment bill is so high.
- MTD: missed the 7 February update, and penalties for MTD for Income Tax.
- Company: file your CT600 yourself.
What this calendar leaves out
- Payroll (monthly PAYE, P60, P11D), CIS and the VAT annual accounting scheme.
- The confirmation statement: its date is on your company's Companies House page.
- A new company's first accounts: due 21 months after it was registered (GOV.UK).
- Non-standard VAT periods and year ends that are not the last day of a month.
Octobooks prepares, you file: it keeps the books these dates rest on. Octobooks is not on HMRC's list of compatible software for MTD yet; until it is, send your returns through a product that is on the list.
Changelog
- 5 November 2026: first version. Every date and penalty checked on GOV.UK.
Sources
- GOV.UK: Self Assessment deadlines, seen 5 November 2026
- GOV.UK: Self Assessment penalties, seen 5 November 2026
- GOV.UK: Payments on account, seen 5 November 2026
- GOV.UK: Pay through your tax code, seen 5 November 2026
- GOV.UK: MTD for Income Tax quarterly updates, seen 4 November 2026
- GOV.UK: Sending a VAT Return, seen 5 November 2026
- GOV.UK: VAT late submission penalty points, seen 5 November 2026
- GOV.UK: Accounts and tax returns for private limited companies, seen 5 November 2026
- GOV.UK: Company Tax Return penalties, seen 5 November 2026
- GOV.UK: Companies House late filing penalties, seen 5 November 2026