VAT calculator
Quickly add or remove VAT from an amount.
Results
How this calculator works
To add VAT, we multiply the net amount by the VAT rate. To remove VAT, we divide the gross amount by (1 + rate) to find the net, then subtract to get the VAT element.
What this calculator does
This VAT calculator adds VAT to a net amount or removes VAT from a gross amount. It is useful for invoices, quotes, or checking how much VAT is included in a price.
You can adjust the VAT rate if you need a reduced or zero rate.
How the formula works
To add VAT, we calculate VAT = net × rate and total = net + VAT. To remove VAT, we calculate net = gross ÷ (1 + rate) and VAT = gross − net.
The rate is entered as a percentage, so 20% becomes 0.20 in the calculation.
Worked example
Example: add 20% VAT to £100. VAT is £20, so the total is £120.
If you remove VAT from £120 at 20%, the net is £100 and the VAT is £20.
Common mistakes
- Removing VAT by subtracting 20% instead of dividing by 1.2.
- Using the wrong rate for the goods or services.
- Mixing net and gross figures in the same calculation.
- Forgetting to change the rate for reduced VAT items.
When to use this calculator
Use this when you need to add VAT to a net price or remove VAT from a gross price. If you need reverse VAT or cross-border rules, use a specialist VAT guide.
FAQs
What is the UK standard VAT rate?
The standard rate is 20%. Some goods and services use reduced (5%) or zero rates.
Why is removing VAT different to subtracting 20%?
A gross price already includes VAT, so you must divide by 1 + rate to get the net amount.
Can I use this for invoices?
Yes, for quick checks. For official invoices, follow HMRC rules and your accounting system.