top of page
Search

Key UK Tax Dates and Deadlines for 2026/27 — Your Complete Calendar

  • Writer: Yoni Finke
    Yoni Finke
  • Apr 4
  • 2 min read
Calendar planner with tax deadline reminder note

Missing a tax deadline can mean penalties, interest charges, and unnecessary stress. Whether you're a sole trader, limited company director, or employer, staying on top of HMRC's key dates is essential. Here's your complete guide to the UK tax calendar for the 2026/27 tax year.

April 2026

6 April — Start of the 2026/27 tax year. New tax rates, allowances, and thresholds take effect. This is also the date from which Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) becomes mandatory for qualifying self-employed individuals and landlords with income over £50,000.

19 April — Deadline for final PAYE submission (Full Payment Submission) for the 2025/26 tax year. Employers must also pay any outstanding Class 1 NICs.

May 2026

31 May — Employers must provide P60 certificates to all employees who were on payroll at 5 April 2026.

July 2026

6 July — Deadline for employers to report expenses and benefits on forms P11D and P11D(b) for the 2025/26 tax year.

31 July — Second payment on account for 2025/26 Income Tax is due for self-employed individuals and landlords.

October 2026

5 October — Deadline to register for Self Assessment if you became self-employed or started receiving untaxed income during the 2025/26 tax year.

31 October — Paper Self Assessment tax return deadline for 2025/26 (if you still file on paper rather than online).

January 2027

31 January — This is the big one. Online Self Assessment tax return deadline for the 2025/26 tax year. Any outstanding Income Tax for 2025/26 must be paid. The first payment on account for 2026/27 is also due on this date.

Quarterly VAT Deadlines

VAT-registered businesses must submit their returns and pay any VAT due one month and seven days after the end of each VAT quarter. The standard quarters and their deadlines are:

  • Quarter ending 30 June — due 7 August

  • Quarter ending 30 September — due 7 November

  • Quarter ending 31 December — due 7 February

  • Quarter ending 31 March — due 7 May

If you're on monthly or annual VAT returns, your dates will differ — get in touch if you're unsure.

Corporation Tax Deadlines

Corporation Tax deadlines are based on your company's accounting period, not the tax year:

  • Corporation Tax payment is due nine months and one day after your accounting period ends.

  • Company Tax Return (CT600) must be filed within 12 months of the accounting period end.

For example, if your year end is 31 March 2027, your Corporation Tax payment is due by 1 January 2028 and your CT600 by 31 March 2028.

Companies House Deadlines

  • Confirmation statements must be filed at least once every 12 months from the date of incorporation or last confirmation statement.

  • Annual accounts must be filed within nine months of your accounting reference date.

  • Late filing attracts automatic penalties starting at £150 and rising to £1,500 for private companies.

Don't Miss a Deadline

At YF Accounting, we track all your key deadlines so you don't have to. If you'd like us to take the stress out of your tax compliance, schedule a free Zoom call and let's chat about how we can help.

bottom of page