Staying on top of tax deadlines is essential for any business owner. Missing important dates can lead to penalties, interest charges, and unnecessary stress. At King and Taylor, we help businesses across Kent, including Gravesend and Sittingbourne, stay compliant and organised.
To make your year easier, here are the key UK tax deadlines for 2025 that every small business, sole trader, and limited company should know.
2025 Tax Calendar at a Glance
| Date | Deadline | Who it Applies To |
|---|---|---|
| 31 January 2025 | Self Assessment Tax Return Due + Final Tax Payment | Self-employed, landlords, directors |
| 5 April 2025 | End of 2024/25 Tax Year | All businesses & individuals |
| 6 April 2025 | Start of 2025/26 Tax Year | All businesses & individuals |
| 19 April 2025 | Final PAYE submissions for 2024/25 | Employers |
| 31 May 2025 | Distribute P60 forms to employees | Employers |
| 6 July 2025 | Submit P11D and P11D(b) forms | Employers who provide benefits |
| 31 July 2025 | Second Payment on Account due | Self-employed |
| 1 October 2025 | Corporation Tax due (for year ending 31 Dec 2024) | Limited companies |
| 5 October 2025 | Register for Self Assessment if newly self-employed | New sole traders |
| 31 October 2025 | Paper Tax Return Deadline | Self-employed, landlords |
| 31 December 2025 | Filing deadline for Corporation Tax Returns (year ending 31 Dec 2024) | Limited companies |
Key Deadlines Explained
31 January 2025 – Self Assessment Filing & Payment
This is one of the most important dates in the tax calendar. You must:
- File your Self Assessment tax return online
- Pay any outstanding tax for the 2023/24 tax year
- Pay your first payment on account for 2024/25
If you’re self-employed, a landlord, or a director with untaxed income, this applies to you. You can read more about this on the HMRC website here. Need help? King and Taylor can prepare and submit your return on time.
5 April 2025 – End of the Tax Year
The 2024/25 tax year closes on this date. It’s your last chance to:
- Use your annual tax allowances
- Maximise pension contributions
- Take advantage of any allowable expenses
6 July 2025 – P11D Filing
If you provide company benefits like a car or medical insurance, you’ll need to submit P11D forms for each relevant employee, as well as a P11D(b) for Class 1A NICs.
31 July 2025 – Second Payment on Account
If your Self Assessment tax bill was over £1,000 last year, you likely need to make a second advance payment for the current year.
5 October 2025 – Register for Self Assessment
Starting your self-employed journey this year? You must register with HMRC by this date to avoid penalties.
Ongoing Monthly/Quarterly Deadlines
- VAT Returns – Usually due every quarter (7 days after the end of the month following the VAT period)
- PAYE/NIC Payments – Due by the 22nd of each month if paid electronically
- Corporation Tax – Due 9 months and 1 day after the end of your company’s accounting period
Don’t Miss a Deadline – Let King and Taylor Handle It
At King and Taylor, we help small businesses across Kent stay ahead of tax deadlines with:
- Timely reminders and filing support
- Personalised tax planning
- Full bookkeeping, payroll, and VAT services
- Expert advice tailored to your business
Whether you’re self-employed, run a limited company, or are just starting out, our team ensures you never miss an important date.
Get in Touch with King and Taylor Today
Worried about staying compliant in 2025? Contact King and Taylor for professional accounting services that keep you on track and penalty-free.
