UK Accounting Calendar 2025
Managing your accounting obligations is crucial for every business and self-employed individual. The UK Accounting Calendar for 2025 highlights all key dates, helping you stay compliant with HMRC, avoid penalties, and plan your finances effectively.
Monthly Breakdown
January 2025: Self Assessment Tax Obligations
Self Assessment Tax Return Deadline: Submit your online tax return for the 2023/2024 tax year. Pay any outstanding tax owed by this date.
Late Submission Penalty: A minimum fine of £100 applies for missed deadlines, with further penalties for continued delays.
February 2025: Penalties and Interest Begin
Late Payment Penalties: Interest and additional penalties start accruing on unpaid Self Assessment tax from the previous tax year.
March 2025: End of Financial Year
End of Financial Year for Many Companies: Companies following an April-March fiscal year must prepare to close their accounts for submission.
April 2025: Start of the New Financial Year
Corporation Tax Financial Year Begins: The new corporation tax year starts for UK companies.
End of the 2024/2025 Tax Year: Finalize income, expenses, and pension contributions for the tax year. Optimize your allowances before the new tax year begins.
Start of the 2025/2026 Tax Year: New tax rates, allowances, and thresholds come into effect.
May 2025: PAYE and Employer Deadlines
PAYE and Class 1 NIC Payment Deadline: Submit and pay PAYE and National Insurance Contributions for April 2025.
P60 Forms Deadline: Employers must provide P60 forms to employees summarizing their earnings and deductions for 2024/2025.
June 2025: Mid-Year Financial Check
July 2025: Employer Deadlines and Second Tax Payments
P11D and P11D(b) Submission Deadline: Employers must submit forms for benefits in kind (e.g., company cars, private healthcare) to HMRC. Provide copies to employees.
Class 1A NIC Payment: Pay National Insurance Contributions on benefits in kind.
Second Payment on Account Deadline: Make the second advance payment for Self Assessment taxes for 2024/2025.
August 2025: Plan for the Future
September 2025: VAT Quarter Deadline
VAT Return Deadline: Submit VAT returns for the period covering July to September 2025.
October 2025: Self Assessment Registration
Self Assessment Registration: Register with HMRC if you have become self-employed or started receiving property income during the year.
VAT Quarterly Filing Deadline: Submit VAT returns for Q3 (July–September) using MTD-compatible software.
November 2025: Stay Ahead
December 2025: Corporation Tax Deadline
Corporation Tax Payment Deadline: Companies with a financial year ending 31 March 2025 must pay their corporation tax by this date to avoid interest and penalties.
How to Stay Organized in 2025
Use Accounting Software: Automate tax filings and payments with tools like Xero, QuickBooks, or Sage.
Set Calendar Reminders: Add all key deadlines to your calendar and set reminders a week before.
Work with a Professional Accountant: Ensure accuracy, optimize tax efficiency, and avoid unnecessary penalties.
Regularly Check HMRC Updates: Stay informed about changes by visiting GOV.UK.
The UK Accounting Calendar for 2025 ensures businesses and individuals remain organized, compliant, and financially prepared. Missing deadlines can be costly, but with proactive planning and professional support, you can avoid penalties and focus on business growth.
For personalized assistance with your accounting needs, get in touch with our team of professionals today!
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