The main UK tax deadlines for businesses and individuals between October 2026 and the end of the 2026 to 2027 tax year are below, checked against GOV.UK. The ones most often missed are 31 October for paper tax returns, 31 January for online returns and payment, 7 November and the following quarterly dates for Making Tax Digital updates, and 6 July for P11D forms. Recurring business deadlines, such as VAT and PAYE, follow fixed rules set out underneath.
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Key dates from October 2026
| Deadline | What is due | Who |
|---|---|---|
| 31 October 2026 | Paper Self Assessment return for 2025 to 2026 | Individuals filing on paper |
| 7 November 2026 | Making Tax Digital quarterly update (quarter to 5 October) | Sole traders and landlords in MTD for Income Tax |
| 30 December 2026 | Online return, if you want an amount collected through your tax code | Eligible PAYE taxpayers |
| 31 January 2027 | Online Self Assessment return for 2025 to 2026, balancing payment, and first payment on account for 2026 to 2027 | Self Assessment taxpayers |
| 7 February 2027 | MTD quarterly update (quarter to 5 January) | MTD for Income Tax users |
| 6 April 2027 | MTD for Income Tax extends to qualifying income over £30,000 | Sole traders and landlords |
| 30 April 2027 | ATED return for 2027 to 2028 | Companies owning UK dwellings within ATED |
| 7 May 2027 | MTD quarterly update (quarter to 5 April) | MTD for Income Tax users |
| 5 July 2027 | Non Resident Landlord annual return (NRLY) | Letting agents and tenants under the scheme |
| 6 July 2027 | P11D and P11D(b) for 2026 to 2027 | Employers providing benefits |
| 22 July 2027 | Class 1A National Insurance payment (19 July by cheque) | Employers providing benefits |
| 31 July 2027 | Second payment on account for 2026 to 2027 | Self Assessment taxpayers |
| 7 August 2027 | MTD quarterly update (quarter to 5 July) | MTD for Income Tax users |
| 5 October 2027 | Register for Self Assessment if you started in 2026 to 2027 | New self employed, landlords and others |
Recurring business deadlines
- PAYE and National Insurance: pay HMRC by the 22nd of the next tax month (19th by cheque).
- CIS monthly return: by the 19th of each month; nil returns are required again from 6 April 2026 unless HMRC has been told in advance. See CIS for contractors.
- VAT: return and payment 1 month and 7 days after the end of the VAT period.
- Corporation Tax payment: 9 months and 1 day after the end of the accounting period, for taxable profits up to £1.5 million.
- Company Tax Return (CT600): 12 months after the end of the accounting period. See Corporation Tax deadlines.
- Registering for VAT: within 30 days of the end of the month in which taxable turnover passed £90,000.
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What happens if you miss a deadline?
Most deadlines carry penalties, and interest runs on late tax. Our HMRC penalties table sets out the amounts, and reasonable excuse explains when a penalty can be cancelled. For a full rates reference, see UK tax rates and thresholds 2026/27.
How can I cite this page?
Suggested citation: Solar Protect, “UK Tax Deadlines Calendar 2026/27”, compiled by Christine Anderson, solarinsurance.co.uk, last reviewed 7 October 2026.
Tax investigation insurance pays your accountant’s fees if HMRC opens a check after your cover starts. Solar Protect cover pays up to £100,000 with no excess. It never pays tax, interest or penalties. Read how our cover works or get a quote today.
Reviewed by Christine Anderson, Broker, Solar Protect. Last reviewed 7 October 2026. Sources: GOV.UK guidance on Self Assessment deadlines, Making Tax Digital quarterly updates, paying PAYE, employer reporting of expenses and benefits, paying Corporation Tax, Company Tax Returns, VAT returns, ATED returns and the Non Resident Landlord Scheme. This guide is general information, not personalised tax advice.