Can this calculator add and remove VAT?
Yes. Enter a net amount to add VAT, or a gross amount to remove VAT and see the net and VAT-only amounts.
VAT Calculator
Add or remove UK VAT
Calculate VAT with the working shown.
Add VAT to a net amount.
Use this when you know the price before VAT and need the VAT-inclusive total.
Add 20% VAT to GBP 100.00.
About this VAT calculation
UK VATUse this for straightforward price checks where you already know the VAT rate to apply.
HMRC guidance says the VAT rate can depend on the goods or services and the conditions of supply.
UK VAT rate guide
Quick reference20%Standard rate for many goods and services.
5%Reduced rate for some qualifying supplies.
0%Zero-rated supplies still have a VAT rate of 0%.
ExemptNo VAT is charged; treatment depends on HMRC rules.
For rate conditions, check GOV.UK guidance on VAT rates for different goods and services.
Recent results
Useful notes
GlossaryVAT examples
Common checksUse these examples to check the direction of the calculation before relying on the result. They assume the VAT rate is already known and applies to the full amount.
| Scenario | Input | VAT | Result |
|---|---|---|---|
| Add 20% VAT | GBP 100.00 net | GBP 20.00 | GBP 120.00 gross |
| Remove 20% VAT | GBP 120.00 gross | GBP 20.00 | GBP 100.00 net |
| Add 5% VAT | GBP 200.00 net | GBP 10.00 | GBP 210.00 gross |
| Zero-rated item | GBP 50.00 net | GBP 0.00 | GBP 50.00 gross |
How to use the VAT calculator
Use the VAT calculator as an estimate-only guide when you need to add VAT to a net amount, remove VAT from a gross amount, find the VAT-only value, or check a simple invoice line. The result card separates the net amount, VAT amount, gross amount and rate so the working is easier to check than a single total.
For adding VAT, the calculator multiplies the net amount by the VAT rate to find the VAT amount, then adds that VAT to the net price. For removing VAT, it divides the gross amount by the VAT multiplier. At 20%, the multiplier is 1.2, so a gross price of GBP 120 divided by 1.2 gives a net price of GBP 100.
What the calculator assumes
The calculator assumes one VAT rate applies to the whole amount entered. It does not decide whether something is standard-rated, reduced-rated, zero-rated, exempt or outside the scope of VAT. GOV.UK's guidance explains that VAT treatment can depend on the supply, the buyer and seller, the place and presentation of the supply, and the records or evidence available.
The custom rate option is useful when checking a non-standard rate, but VAT treatment depends on the goods or services, the customer, the country and the conditions of supply. For UK VAT decisions, check current HMRC guidance or speak to a suitable adviser.
Last reviewed: 19 July 2026. Source checked against HMRC VAT rates guidance.
VAT source notes
HMRC guidanceThis calculator uses arithmetic only. It does not classify goods or services. HMRC's VAT rates guidance separates taxable rates from exempt and outside-the-scope treatment, and explains that detailed conditions can apply.
Official GOV.UK source information is Crown copyright and available under the Open Government Licence v3.0 unless otherwise stated. Links are provided so you can check the current official wording.
VAT calculator FAQs
Which VAT rates are included?
The calculator includes common UK VAT rate options of 20%, 5% and 0%, plus a custom rate field.
Is this VAT advice?
No. It is a general calculator only. Which VAT rate applies can depend on the goods, service, place of supply and conditions set by HMRC.
Can it check an invoice line?
Yes. The invoice line mode can combine quantity, unit net price, discount, shipping and VAT rate to show net, VAT and gross totals.
Why can VAT totals differ by a penny?
Penny differences can happen when VAT is rounded on each invoice line instead of rounded once on the subtotal. The decimal-place setting controls the displayed result.