This year, if you’ve paid too much or too little tax, we’re making the process as easy as possible for you.

We will tell you how we’re collecting any underpayment, or we’ll give you a cheque if we owe you money.

There is no need to contact us unless you think the details we’ve used are wrong.

What you need to do

If you get a P800 tax calculation, please check the details are correct.

You can:

• compare the figures used with your own records, such as your P60, P11d, bank statements or letters from the Department for Work and Pensions (DWP)
• use the HMRC tax checker to check how much tax you should have paid

You don’t need to do anything if the calculation is correct.

If you’ve underpaid tax

If you haven’t paid enough tax, we’ll usually change your tax code for the next year to collect the money you owe. This happens automatically so you won’t need to do anything and don’t need to contact us.

Sometimes we can’t collect the money you owe through your tax code, for example, if you’re now out of work. In this case, we’ll write to you explaining how to pay the money you owe.

If you’ve overpaid tax

If you have paid too much tax, we will automatically send you a cheque within 14 days of receipt of your P800. You won’t need to do anything and don’t need to contact us.

Need more information?

You can find more about P800 tax calculations by:

• reading the notes sent with your P800 tax calculation
• looking at the P800 information pages
• watching the video ‘Your P800 tax calculation explained’