United Kingdom Self-Employed Tax Deadlines 2025/26
Never miss a HMRC deadline. This page lists every important tax date for United Kingdom self-employed individuals and sole traders during the 2025/26 tax year, with live countdown timers and one-click iCal export.
Registration Deadlines
- 2024-10-05 — Register for Self Assessment: Deadline to register for Self Assessment if you became self-employed in 2023/24 tax year.
- 2025-10-05 — Register for Self Assessment (New): Deadline to register for Self Assessment if you became self-employed in the 2024/25 tax year.
- 2026-10-05 — Register for Self Assessment (New): Deadline to register for Self Assessment if you became self-employed in the 2025/26 tax year.
Filing Deadlines
- 2024-10-31 — Paper Tax Return Deadline: Deadline to submit a paper Self Assessment tax return for 2023/24.
- 2025-10-31 — Paper Tax Return Deadline: Deadline to submit a paper Self Assessment tax return for 2024/25.
- 2026-10-31 — Paper Tax Return Deadline: Deadline to submit a paper Self Assessment tax return for 2025/26.
Payment Deadlines
- 2025-01-31 — Online Tax Return & Payment Deadline: Deadline to file your online Self Assessment return for 2023/24 and pay any tax owed. Also the deadline for the 1st Payment on Account for 2024/25.
- 2025-07-31 — 2nd Payment on Account: Deadline for the 2nd Payment on Account for 2024/25 (if applicable). Applies if your previous tax bill was over £1,000.
- 2026-01-31 — Online Tax Return & Payment Deadline: Deadline to file your online Self Assessment return for 2024/25 and pay any tax owed. Also the deadline for the 1st Payment on Account for 2025/26.
- 2026-07-31 — 2nd Payment on Account: Deadline for the 2nd Payment on Account for 2025/26 (if applicable).
- 2027-01-31 — Online Tax Return & Payment Deadline: Deadline to file your online Self Assessment return for 2025/26 and pay any tax owed. Also the deadline for the 1st Payment on Account for 2026/27.
- 2027-07-31 — 2nd Payment on Account: Deadline for the 2nd Payment on Account for 2026/27 (if applicable).