UK Tax Return Deadline for 2024-25 Approaches: File by Jan. 31, 2026 – HMRC

The deadline for filing self-assessment tax returns for the 2024-25 tax year is January 31, 2026. Taxpayers must report income from self-employment, rental properties, or other sources to HMRC, with online submissions due by that date and paper returns required by October 31, 2025. Individuals may need to file if they are self-employed, landlords, or subject to the high-income child benefit charge. The tax year runs from April 6, 2024, to April 5, 2025. Failure to file on time may result in penalties. Taxpayers can claim deductions for business expenses, home office costs, and property maintenance, reducing taxable profits. Landlords face limited mortgage interest relief but can offset losses against gains. Pensioners nearing the higher-rate threshold may also be affected by frozen tax bands. HMRC will issue a tax bill after submission; payment is due by January 31, 2026. Corrections can be made until January 31, 2027. Errors may trigger penalties of up to 100% of unpaid tax, depending on intent. Taxpayers can use HMRC’s online portal, third-party software, or hire an accountant. Those no longer needing to file must notify HMRC in writing before the deadline.