The payment deadline for Self Assessment is 31st January and interest is charged from 1st February on any outstanding amounts. A 5% late payment penalty is also charged on any unpaid tax that is still outstanding on 3rd March. But this year, because of the coronavirus pandemic, HMRC announced that if self assessment taxpayers pay their tax or set up a payment plan by 1st April, they would not be charged a 5% late payment penalty.
HMRC is giving taxpayers more time to pay or set up a payment plan.
Please visit HMRC to setup plan