If you’ve been sent a P800 tax calculation by HM Revenue & Customs (HMRC), it either means you’re getting a tax refund or you need to pay more tax.

Check what the P800 tax calculation says. If you think the figures are wrong, you can ask HMRC to check them again.

HMRC Income Tax enquiries
Telephone: 0300 200 3300
Textphone: 0300 200 3319
Monday to Friday, 8am to 8pm
Saturday, 8am to 4pm
Find out about call charges.

If you’re due a refund

HMRC will usually send you a cheque within 14 days. If you’re owed tax from more than 1 tax year, you’ll get 1 cheque for the entire amount.

If you need to pay more tax

You owe less than £3,000

HMRC will usually change your tax code so the tax you owe is taken from your wages or pension in the future.

The P800 tax calculation tells you how much extra they will take during the next tax year.

You owe more than £3,000

HMRC will write to you about other ways you can pay.

If paying the extra tax would make things difficult for you, call HMRC. They may be able to arrange for you to pay the tax you owe over a longer period.

HMRC Income Tax enquiries
Telephone: 0300 200 3300
Textphone: 0300 200 3319
Monday to Friday, 8am to 8pm
Saturday, 8am to 4pm
Find out about call charges.

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