Free UK VAT Tax Calculator
Calculate VAT in seconds. Add VAT to a net price, remove VAT from a gross price, or extract just the VAT element from an amount that already includes VAT.
How to use this UK VAT tax calculator
This UK VAT tax calculator is designed for freelancers, shop owners, contractors, bookkeepers, and everyday buyers who want quick and accurate VAT calculations. You simply enter an amount, choose your VAT rate, select the calculation type, and click calculate.
- Add VAT: Use when your amount is before tax (net) and you need the final price (gross).
- Remove VAT: Use when your amount already includes VAT (gross) and you need the pre-tax value (net).
- Extract VAT: Use when you only need the VAT component from a VAT-inclusive figure.
UK VAT rates at a glance
In the United Kingdom, VAT rates depend on the type of goods or services sold. The calculator includes the most common rates and allows custom percentages for special cases.
- 20% Standard Rate: Applies to most goods and services.
- 5% Reduced Rate: Applies to specific items such as some home energy or children’s car seats.
- 0% Zero Rate: Applies to qualifying goods like most food and children’s clothing.
- Exempt / Outside Scope: Not the same as 0% VAT; these are handled differently for accounting and returns.
Rules can change, so always verify special treatment with HMRC guidance or your accountant.
VAT formulas explained
1) Add VAT to a net amount
If your price is before VAT, calculate gross using:
Gross = Net × (1 + VAT Rate ÷ 100)
2) Remove VAT from a gross amount
If your amount already includes VAT, calculate net using:
Net = Gross ÷ (1 + VAT Rate ÷ 100)
3) Find just the VAT amount from gross
To isolate VAT from a VAT-inclusive value:
VAT = Gross × VAT Rate ÷ (100 + VAT Rate)
Practical examples
Example A: Adding VAT to an invoice
You invoice a client £500 for services, plus 20% VAT.
- VAT = £100
- Gross total = £600
Example B: Removing VAT from a receipt
You have a receipt total of £240 including 20% VAT.
- Net amount = £200
- VAT included = £40
Example C: Reduced-rate goods
A product costs £84 including 5% VAT.
- Net amount = £80
- VAT portion = £4
When this calculator is most useful
- Creating quotes and invoices quickly
- Checking supplier bills and receipts
- Estimating project costs before or after tax
- Preparing bookkeeping entries
- Verifying totals before filing VAT returns
Common VAT mistakes to avoid
- Confusing zero-rated and exempt: They are not the same for VAT reporting.
- Applying the wrong rate: Some products/services are reduced or zero-rated.
- Using add/remove formulas interchangeably: This creates incorrect VAT values.
- Rounding too early: Keep precision until final totals are generated.
FAQ
Is this an official HMRC calculator?
No. This is a practical VAT tool for estimates and day-to-day checks. Always confirm compliance details with HMRC guidance.
Can I use a custom VAT percentage?
Yes. Choose “Custom Rate” in the dropdown and enter your own percentage.
Does this tool work for reverse VAT calculations?
Yes. Select “Remove VAT” or “Extract VAT Portion” when your amount already includes VAT.
Final thoughts
A reliable UK VAT tax calculator helps you make faster pricing decisions, keep cleaner records, and reduce calculation errors. Whether you are issuing invoices, reviewing expenses, or simply checking a total, this tool gives you a quick and clear VAT breakdown in one click.