Tax Deadlines & Key Dates | Digivolve Accountants Haywards Heath

Check the main UK tax deadlines for 2026/27 and use our live Tax Deadline Diary to view the next 12 months.

This calendar automatically updates every day for individuals, businesses and companies.

Key Self Assessment dates for the 2025/26 tax year

• 5 October 2026: tell HMRC if you need to complete a return and have not previously registered.
• 31 October 2026: deadline for most paper returns.
• 30 December 2026: online filing deadline if you want eligible tax collected through your PAYE tax code.
• 31 January 2027: online return and payment deadline.
• 31 July 2027: second payment on account, where one is due.

VAT returns and payments are usually due one calendar month and seven days after the accounting period. Corporation Tax is normally payable nine months and one day after the accounting period ends. Check the exact dates in your HMRC account because circumstances and schemes can change them.

Read about our Self Assessment support in Haywards Heath or explore our free tax calculators and guides.

✅ Corporation Tax deadlines

✅ Self Assessment filing dates

✅ P11D and PAYE obligations

✅ VAT return reminders

For personalised reminders and to view your actual amounts due, log in to the Digivolve Client Portal.