HMRC Simple Assessment Explained

What is a Simple Assessment?

If you are employed or receive a pension then you may receive a simple assessment if HMRC find that you have underpaid you tax by more than £3,000.

After the end of a tax year*, HMRC reviews the information they have on file about your income from things like employment, pensions and benefits in kind. They then compare this to the amount of tax you have paid using paperwork like P60s and P45s.

If they find that you have underpaid your tax by more than £3,000 they will send you a Simple Assessment, normally by November, which includes a tax calculation and details of how you can pay your bill.

* the tax year starts 6 April and ends 5 April each year

What to Do If Your Simple Assessment is Wrong

If you disagree with the tax calculation HMRC sends you then you 60 days to respond to HMRC in writing or by phone. Once 60 days have passed you’ll need to settle your tax bill.

When Do Your Need to Pay Your Tax to HMRC

You’ll need to pay your simple assessment tax by the 31 January following the end of the tax year that you owe money.

So if you received an assessment for the tax year 2019/2020, you’ll need to settle any tax you owe by 31 January 2021.

How to Pay Your Simple Assessment Tax

You can pay your tax bill by going online, bank transfer or cheque.

If you chose to do a transfer then you’ll need to use your Charge Reference Number as your payment reference so it gets allocated correctly. HMRC’s bank details are account number: 12001020 and sort code: 08 32 10.

If you prefer to send a cheque, then you’ll need to make it out to HM Revenue and Customs only, write your charge reference number on the back and post it to:

HMRC
Direct
BX5 5BD


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Anita Forrest
About Anita Forrest

Anita Forrest is a Chartered Accountant, spreadsheet geek, money nerd and creator of www.goselfemployed.co - the UK small business finance blog for the self-employed community. Here she shares simple, straight-forward guides to make self-employment topics like taxes, bookkeeping and banking easy to understand.