The deadline for the second payment on account for income tax paid through Self-Assessment is due by midnight 31st July!
Payments on account are advance payments towards your tax bill (including Class 4 National Insurance if you’re self-employed).
You have to make 2 payments on account every year unless:
There are 2 payment dates each year - 31 January and 31 July, and each payment is half your previous years' tax bill.
You can see your Self Assessment statement by logging in to your online HMRC account and clicking ‘View statements’. You’ll see:
Failing to make a payment before or on 31st July will result in interest being charged from the date the payment is due. The current charge rate for late payment at the time of writing is 3% (rates often change, so please visit HMRC website for an up to date rate payable).
There are various ways to pay...