Paying a tax bill is never going to appear on a top 10 enjoyable things to do list. But paying it and also paying it correctly so it is allocated against your account correctly are important. Late payment can result in fines and interest increasing your tax bill.
But first let’s look at the deadlines for both corporation tax and self assessment tax. The deadlines are when the payment has to be received by HM Revenue and Customs (HMRC) not when it leaves your account. So do take into account clearing times that the different payment methods have
For companies with taxable profits up to £1.5 million, corporation tax is just a one off payment that needs to be made before 9 months and 1 day after the companies year end.
The deadline for payment of Self assessment tax due is 31st January. This payment is for the previous tax year and also includes the first payment on account for the next tax year if due (You can find out more about this here)