If your Self Assessment bill is over £1,000, HMRC asks for payments on account — advance payments towards next year's tax, each worth half this year's bill.
Enter your tax bill (income tax and Class 4 NI, but not Class 2) and we'll show the two instalments and how the balancing payment works.
An advance payment towards next year's Self Assessment, due if your bill is over £1,000. There are two, each 50% of your current bill, due 31 January and 31 July.
The first by 31 January (with your balancing payment) and the second by 31 July.
Yes, if you expect to earn less you can ask HMRC to reduce them — but if you reduce them too far you'll be charged interest on the shortfall.
Loading the calculator…