Make payment on the previous working day where the due date falls on a weekend/bank holiday.
Every month
19 Submit CIS contractors’ monthly return.
22 PAYE/NICs/CIS deductions paid electronically for period ending 5th of the month (19th if not paying electronically).
Month end
Submit CT600 for year ending 12 months previously.
Last day to amend CT600 for year ending 24 months previously.
April 2025
1 Residential SDLT threshold reverts to £125,000 with 2% rate then applying up to £250,000. First-time-buyer thresholds reduced by £125,000. SDLT on additional residential properties surcharge increased by 2%.
6 Employers’ NIC rate increased by 1.2% and secondary threshold lowered to £5,000. Employment allowance per business increased to £10,500. Increases to voluntary class 2 and class 3 NICs. Car and van fuel benefit and van benefit charges rise. CGT for carried interest increases to 32%. CGT business asset disposal relief increased by 4%. National minimum wage rates rise.
July 2025
5 Last date to agree a new PAYE Settlement Agreement (PSA) for 2024/25.
6 Deadline for employers to submit forms P11D (expenses) and P11D (b) (benefits) for 2024/25 to HMRC and provide copies to employees.
22 Pay class 1A NICs (19 July if not paying electronically).
31 Confirm tax credit claims for 2024/25 and renewal for 2025/26. Second payment on account for 2024/25 income tax and class 4 NICs.
August 2025
1 Penalty of 5% of the tax due or £300, whichever is the greater, where the 2023/24 tax return has not been filed.
October 2025
5 Deadline to register for self-assessment for 2024/25.
22 Pay tax and class 1B NICs on PSAs (19th if not paying electronically).
31 Deadline for 2024/25 tax return if filed on paper.
December 2025
30 Deadline to submit 2024/25 tax return online to have underpaid PAYE tax collected through the 2026/27 tax code.
January 2026
31 Submit 2024/25 self-assessment tax return online. Pay balance of 2024/25 income tax, class 4 NICs, CGT, class 2 NICs paid voluntarily plus first payment on account for 2025/26 income tax and class 4 NICs.
February 2026
1 Initial penalty imposed where the 2024/25 tax return has not been filed or has been filed on paper after 31 October 2025.
March 2026
3 First 5% penalty imposed on 2024/25 tax unpaid on 3 March.
April 2026
6 Making Tax Digital for Income Tax Self-Assessment starts for self-employed workers and landlords with qualifying income over £50,000.