VAT Calculator UK
Extract VAT from a tax-inclusive amount in GBP for invoice and pricing checks.
Quick answer
VAT Calculator UK helps estimate the result from your inputs in the browser. Use the output as a planning number, then compare it with your records, provider terms, or official guidance before making a final decision.
This calculator is for estimates only. Check the applicable VAT rules for your exact case before issuing invoices or returns.
Calculator
Results update as you type
Tax base
Use this as a practical tax estimate, then verify the applicable rate before filing or invoicing.
Breakdown
Example
UK VAT planning keeps the math simple: it shows the base, tax and total instantly in the browser. Tax is rounded to cents; in reverse calculations the base is the entered total minus the rounded tax.
Formula
The math behind the result
How it works
A clean flow from input to answer
- 1Enter a VAT-inclusive price in GBP.
- 2Set the UK VAT rate you want to model.
- 3Read the base, VAT amount, and total instantly.
FAQ
Common questions
Is the calculator fixed to one rate?
No. You can enter any rate to model different VAT scenarios.
Does it support reverse VAT?
Yes. It can back out the tax base from the total price.
Can businesses use it for quoting?
Yes. It is useful for quick quote and invoice planning.
Does it require signup?
No. It runs directly in the browser.
Is my pricing data stored?
No. The calculation stays local to the device.
Add VAT and extract VAT using the correct base
Adding 20% VAT to a net £100 price produces £20 VAT and a £120 gross total. Extracting VAT from £120 does not mean subtracting 20% of £120; the VAT fraction is 20/120, which returns the same £20 tax and £100 net amount.
Choose the rate that applies to the specific supply. Standard, reduced, zero-rated, exempt, and outside-scope treatments are not interchangeable. A zero-rated sale can still be taxable for reporting and input-tax purposes, while an exempt supply follows different recovery rules.
Invoices may require a tax point, VAT registration number, sequential identifier, net values, rate, VAT amount, and gross total. Rounding can occur per line or on totals depending on the accounting workflow, so reconcile calculator results with the invoicing system rather than forcing a penny difference.
Cross-border services, imports, reverse charge, flat-rate schemes, partial exemption, and registration thresholds require HMRC guidance or professional advice. The calculator performs arithmetic for the rate entered; it does not classify the transaction or file a VAT return.
Verification
Official sources and limitations
Verified on 2026-07-09
Official sources
Calculation scope
- Standard-rate planning only unless the user overrides the rate manually.
- Not a filing workflow, MTD workflow, or exemption decision engine.
Confirm for your case
The result applies the displayed rates to your entered amount. It does not determine whether a supply is taxable, zero-rated, or exempt.