Resources · Calculators
UK VAT calculator
Add or extract VAT at standard and reduced rates.
About this calculator
What it estimates
Adds VAT to a net amount, or extracts the VAT element from a gross amount, at the standard (20%) or reduced (5%) rate.
Assumptions (UK 2025/26 tax year rates)
- •Standard rate 20%, reduced rate 5%
- •Zero-rated and exempt supplies not modelled
Estimates only, for orientation. Rates and thresholds change each tax year and your actual liability depends on facts this tool does not ask for. This is not tax advice.
For US–UK filers
Why your real number differs
Useful for checking our own invoices: TaxStone's fees carry UK VAT for UK-resident clients and none for clients resident in the US.