Correspondence from HMRC suggests there is a penalty if you don’t pay your self-assessment tax by 31 January 2026. Not strictly true!
We do not suggest missing the deadline but if you do, you’ll be charged late payment interest at 7.75% per annum – high! Penalties do not kick in until you are 30 days late as stated online.
If you are in financial difficulty, contact HMRC as soon as possible to agree a payment plan.
