Staying ahead of your tax obligations is crucial for every UK business, especially start-ups and small enterprises. Missing a deadline can result in penalties and unnecessary stress. That’s why we’ve put together this clear and concise calendar to help you stay on track throughout the 2025/26 tax year.

Key Tax Deadlines (2025/26)

1. VAT Deadlines (if VAT-registered):

• Quarterly VAT Returns: These are due one month and seven days after the end of each VAT period.
• Example: For the January–March quarter, your return is due by 7th May 2025 

2. PAYE and National Insurance:

• Monthly PAYE Payments: Must be paid by the 22nd of each month if paying electronically.
• Year-End Submission: The final Full Payment Submission (FPS) for the tax year ending 5th April 2026 must be submitted by 5th April 2026.

3. Corporation Tax:

• Payment Deadline: Due 9 months and 1 day after the end of your accounting period.
• Filing Deadline: Your Corporation Tax return must be filed 12 months after the end of your accounting period.

4. Self Assessment Tax Returns:

• Paper Submission: Deadline is 31st October 2025.
• Online Submission: Deadline is 31st January 2026.
• Payment Deadline: Also 31st January 2026, including any balance owed and the first payment on account (if applicable). 

5. Making Tax Digital (MTD):

• All VAT-registered businesses must continue using MTD-compliant software to submit their VAT returns digitally. 

Tips for Staying Organised

• Leverage cloud accounting software to set up automatic reminders for key dates.
• Block out time each quarter to review your finances and tax responsibilities.
• Work with a professional accountant to ensure compliance and make the most of any tax-saving opportunities.
• Need a Hand with Your Tax Deadlines?

Let us take the stress out of tax season. Whether it’s managing VAT returns, PAYE submissions or Self Assessment, we’re here to help you stay compliant and focused on growing your business.

Get in touch today to find out how we can support you.