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VAT calculator

Add VAT to a price or take it off, and check whether you need to register for VAT, with the exact date to register by. Nothing you type leaves your device.

Based on GOV.UK guidance, last checked 29 October 2026 · A guide only, not tax advice

Add or remove VAT

What do you want to do? Add VAT to a priceTake VAT off a price that includes it

Amount

£

VAT rate Standard rate 20%Reduced rate 5% (for example domestic energy)

Calculate

Do I need to register for VAT?

You must register if your VAT taxable turnover for the last 12 months is over £90,000. It’s a rolling 12 months, not the tax year, so check it at the end of every month.

VAT taxable turnover for the last 12 months Your sales, not profit. Leave out VAT-exempt sales

£

The month those 12 months end If you’re over, pick the first month your 12-month total went over £90,000

Expected turnover in the next 30 days alone Optional: for a big contract or a one-off sale

£

The date you realised that Optional: today if left blank

Check the threshold

The rules in short

• Over £90,000 in the last 12 months: register within 30 days of the end of the month you went over. You’re registered from the first day of the second month after you went over.
• Expect to go over £90,000 in the next 30 days alone: register by the end of those 30 days. You’re registered from the date you realised.
• If you register late, HMRC can charge you the VAT you should have charged from your effective date, plus a penalty.
• If you go over only for a one-off reason and expect to be back under £88,000, you can ask HMRC for an exception.

Example: your 12-month total first goes over £90,000 at the end of January 2027. You must register by 2 March 2027, and you’re VAT registered from 1 March 2027.

Sources: Register for VAT and VAT rates on GOV.UK.