Accountancy Calendar 2025
Staying ahead of key tax, payroll, and company filing deadlines is critical for both businesses and individuals. This Accountancy Calendar for 2025 provides a clear month-by-month breakdown of important dates, including due dates for Corporation Tax payments, PAYE and NIC deadlines, self-assessment milestones, and company accounts filing requirements. Whether you’re managing corporate finances or personal tax obligations, this guide helps ensure compliance and avoid costly penalties by keeping you informed of all critical deadlines throughout the year.
APRIL 2025
1st – Due date for payment of Corporation Tax for period ended 30th June 2024
5th – Last day of the 2024/25 Tax Year
6th – First day of the 2025/26 Tax Year
6th – IR35 in the private sector comes into force
19th – PAYE and Class 1 NIC Payment Deadline for March 2025
19th – PAYE quarterly payments are due for small employers for periods 6th January 2025 to 5th April 2025
19th – Deadline for employers’ final PAYE return to be submitted online for 2024/2025
30th – Deadline for filing company annual accounts for the year ending 31st July 2024
MAY 2025
1st – Due date for payment of Corporation Tax for period ended 31st July 2024
19th – PAYE and Class 1 NIC Payment Deadline for April 2025
31st – P60 Forms Deadline for issuing annual P60s for 2024/2025
31st – Deadline for filing company annual accounts for the year ending 31st August 2024
JUNE 2025
1st – Due date for payment of Corporation Tax for period ended 31st August 2024
19th – PAYE and Class 1 NIC Payment Deadline for May 2025
30th – Deadline for filing company annual accounts for the year ending 30th September 2024
JULY 2025
1st – Due date for payment of Corporation Tax for period ended 30th September 2024
6th – Deadline for filing P11D and P11D(b) forms – Copies should be provided to employees
19th – PAYE and Class 1 NIC Payment Deadline for June 2025
22nd – Deadline for paying Class 1A NIC (electronically) -Paid on benefits provided to employees such as medical insurance
31st – Second Payment on Account Deadline for Self-Assessment taxes for 25/26
31st – Deadline for filing company annual accounts for the year ending 31st October 2024
AUGUST 2025
1st – Due date for payment of Corporation Tax for period ended 31st October 2024
19th – PAYE and Class 1 NIC Payment Deadline for July 2025
31st – Deadline for filing company annual accounts for the year ending 30th November 2024
SEPTEMBER 2025
1st – Due date for payment of Corporation Tax for period ended 30th November 2024
19th – PAYE and Class 1 NIC Payment Deadline for August 2025
30th – Deadline for filing company annual accounts for the year ending 31st December 2024
OCTOBER 2025
1st – Due date for payment of Corporation Tax for period ended 31st December 2024
5th – Registration deadline for Self-Assessment if you have become self-employed or started receiving property income during the year.
19th – PAYE and Class 1 NIC Payment Deadline for September 2025
31st – Deadline for filing company annual accounts for the year ending 31st January 2025
NOVEMBER 2025
1st – Due date for payment of Corporation Tax for period ended 31st January 2025
19th – PAYE and Class 1 NIC Payment Deadline for October 2025
30th – Deadline for filing company annual accounts for the year ending 28th February 2025
DECEMBER 2025
1st – Due date for payment of Corporation Tax for period ended 28th February 2025
19th – PAYE and Class 1 NIC Payment Deadline for November 2025
31st – Deadline for filing company annual accounts for the year ending 31st March 2025
JANUARY 2026
1st – Due date for payment of Corporation Tax for period ended 31st March 2025
19th – PAYE and Class 1 NIC Payment Deadline for December 2025
31st – Self assessment tax return deadline
31st – Deadline for filing company annual accounts for the year ending 30th April 2025
FEBRUARY 2026
1st – Due date for payment of Corporation Tax for period ended 30th April 2025
19th – PAYE and Class 1 NIC Payment Deadline for January 2026
28th– Deadline for filing company annual accounts for the year ending 31st May 2025
MARCH 2026
1st – Due date for payment of Corporation Tax for period ended 31st May 2025
19th – PAYE and Class 1 NIC Payment Deadline for February 2026
31st – Deadline for filing company annual accounts for the year ending 30th June 2025
Stay Compliant and Organised with the 2025 Accountancy Calendar
Never miss a deadline with this accountancy calendar 2025, bookmark this page or share it with your team to stay on top of your financial responsibilities in 2025. Need tailored support? Get in touch to learn how our expert accountancy services can help you stay compliant and focused on what matters most.