Leave the complexities of tax behind – let us take care of it for you.
Managing your tax affairs can be time-consuming and intricate. At BMC Accountants, we simplify the process, ensuring your finances are in expert hands while you focus on what’s important to you. Get in touch with us today, and experience peace of mind with our accounting and professional tax services.Get in Touch
As we step into 2025, staying ahead of your accounting deadlines is crucial for keeping your business compliant and avoiding unnecessary fines or penalties. From self-assessments to payroll submissions, being aware of key accounting dates will help you manage your finances efficiently and stress-free.
This article highlights the critical accounting deadlines for 2025, explains their importance, and offers tips to ensure you stay on track.
Why Accounting Deadlines Are Critical
Imagine this: Claire, a self-employed web developer, forgot to make her first Payment on Account by 31 January. HMRC not only imposed a fine but also added interest to her unpaid balance. By staying organised and meeting deadlines, she could have avoided the financial hit and unnecessary stress.
Meeting deadlines ensures you remain compliant with HMRC, avoid penalties, and manage your cash flow effectively. Let’s dive into the most important dates for 2025.
Action Point: Don’t Miss a Key Accounting Date!
Subscribe to the BMC Accountants Newsletter to stay updated with all important accounting dates, plus weekly scoop of the best accounting and financial tips we share to our community weekly.
Key Accounting Deadlines for 2025
Here’s your go-to calendar for the year’s most important accounting deadlines:
January 2025
- 31 January 2025:
- Deadline for filing online Self Assessment Tax Returns for the 2023/24 tax year.
- Payment of any tax owed for the 2023/24 tax year.
- First Payment on Account for the 2024/25 tax year is due.
Tip: Missing this deadline could result in an automatic £100 penalty, even if you have no tax to pay.
February 2025
- 2 February 2025:
- Deadline for submitting form P46 (Car) for the quarter ending 5 January 2025.
April 2025
- 5 April 2025:
- End of the 2024/25 tax year.
- 6 April 2025:
- Start of the 2025/26 tax year.
- 19 April 2025:
- Deadline for employers to make their final PAYE submissions for the 2024/25 tax year.
May 2025
- 31 May 2025:
- Deadline for issuing P60 forms to employees for the tax year ending 5 April 2025.
July 2025
- 6 July 2025:
- Deadline for submitting P11D and P11D(b) forms and providing employees with copies of their P11D.
- 31 July 2025:
- Second Payment on Account for the 2024/25 tax year is due.
October 2025
- 5 October 2025:
- Deadline to register for Self Assessment for the 2024/25 tax year if you’re self-employed or have income requiring you to file a tax return.
- 31 October 2025:
- Deadline for postal submission of Self Assessment Tax Returns for the 2024/25 tax year.
December 2025
- 30 December 2025:
- Deadline for online Self Assessment tax returns if you want HMRC to collect tax owed (less than £3,000) through your PAYE tax code.
- 31 December 2025:
- End of the year—a great time to review your financial achievements and set resolutions for 2026.
What Happens If You Miss a Key Accounting Deadline?
Missing deadlines can have serious consequences, including:
- Fines: A minimum £100 fine for late Self Assessment filings, plus additional penalties for prolonged delays.
- Interest: HMRC charges interest on unpaid tax from the due date.
- Surcharges: Penalties for late VAT, PAYE, or Payments on Account.
For example, if you miss the 31 January Self Assessment deadline, penalties increase the longer your return remains outstanding. Don’t let this happen to you!
Stay on Top of Your Deadlines with BMC Accountants
2025 brings a fresh slate of opportunities, but staying on top of your accounting deadlines is essential for running a smooth, compliant business. From self-assessments to PAYE submissions, each deadline plays a vital role in managing your financial health. Meeting critical deadlines, such as VAT returns, can be a challenge—but that’s where BMC Accountants comes in.
If you’re feeling overwhelmed or simply want to maximise your tax efficiency, reach out to us. We specialise in helping UK creatives, health and beauty professionals, and property investors to stay compliant, save money, and focus on growth.
Get in touch and let’s make 2025 your most organised and financially successful year yet!