The second 2024/25 self-assessment (SA) payment on account for income tax and Class 4 National Insurance Contributions (NICs) is due for payment on or before midnight on Thursday 31 July 2025.
Anyone who is self-employed is required to make two payments on account for 2024/25 unless:
- Their 2023/24 SA tax bill was less than £1,000, or
- More than 80 percent of all the tax owed in 2023/24 was deducted at source, for example via PAYE.
Each payment on account made should be 50 percent of the person’s total income tax and Class 4 NICs liability for 2023/24. If the final tax liability in 2024/25 is greater than the total payments on account made, a balancing payment will be due on or before 31 January 2026.
If a taxpayer knows that their tax bill for 2024/25 is going to be lower than that in 2023/24, a claim can be made to HMRC to reduce payments on account.