VAT Add / Remove Calculator
To add VAT: multiply the net amount by 1.20 (for 20% VAT). To remove VAT: divide the gross amount by 1.20. The VAT portion is the difference between gross and net.
Need to add VAT to a price or remove VAT from a total? This calculator handles both directions instantly. Enter your amount, choose whether to add or remove VAT, and select the rate.
The UK standard VAT rate is 20%. Reduced rate (5%) applies to some goods like children’s car seats and home energy. Zero rate (0%) applies to most food, children’s clothes, and books.
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What this calculator does
This calculator adds VAT to a net amount or removes VAT from a gross amount. It shows the net amount, the VAT amount, and the gross amount clearly.
Who it is for
Freelancers, small business owners, accountants, and anyone who needs to quickly work out the VAT on an invoice, quote, or receipt.
How to use it
Choose whether you want to add or remove VAT. Enter your amount. Select the VAT rate (20% standard, 5% reduced, 0% zero, or custom). Click 'See My Result' to get the breakdown.
How the calculation works
Adding VAT: Gross = Net × (1 + VAT rate). Removing VAT: Net = Gross ÷ (1 + VAT rate). The VAT amount is the difference between gross and net.
Worked example
Adding 20% VAT to £100: Gross = £100 × 1.20 = £120. VAT = £20. Removing 20% VAT from £120: Net = £120 ÷ 1.20 = £100. VAT = £20.
Assumptions and limitations
- UK standard VAT rate is 20% as of April 2025
- Some goods and services attract reduced (5%) or zero (0%) rates
- This calculator does not determine which VAT rate applies to specific goods or services
- VAT-registered businesses must charge VAT on most sales
Frequently asked questions
How do I add VAT to a price?
Multiply the net (ex-VAT) price by 1.20 for standard 20% VAT. For example, £100 net becomes £120 gross. The VAT portion is £20.
How do I remove VAT from a gross amount?
Divide the gross (inc. VAT) amount by 1.20 for standard 20% VAT. For example, £120 gross becomes £100 net. The VAT portion is £20.
What is the formula for reversing VAT?
To remove VAT: Net = Gross ÷ (1 + VAT rate). A common mistake is subtracting 20% of the gross — this gives the wrong answer because 20% of the gross is more than the actual VAT.
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Sources and references
HMRC VAT rates (https://www.gov.uk/vat-rates)
Last updated
Last reviewed: 2026-04-12.