About thevatcalculator.io

VAT can be confusing. The maths is straightforward once you know the rules, but figuring out which rules apply to you, which rate to use, and whether you even need to be VAT-registered is a different matter entirely.

This site exists to make that easier.

thevatcalculator.io offers six free VAT calculators built for UK business owners, freelancers, and sole traders. Whether you need to add VAT to a quote, remove VAT from a receipt, check whether your turnover is approaching the registration threshold, or work out whether the Flat Rate Scheme would save you money, there is a calculator here for you.

Each calculator comes with a plain-English explanation of how the maths works, a step-by-step worked example, and answers to the questions people actually ask. There are no paywalls, no sign-ups, and no downloads. Everything works directly in your browser.

Accuracy matters to us. VAT rules, thresholds, and rates do change. Every page on this site is reviewed and updated for each tax year so the figures you see reflect current HMRC guidance, not outdated information copied from somewhere else.

The calculators are free to use, and always will be.

If you have a question, spot an error, or want to suggest a calculator we have not built yet, contact us.