Tax
VAT Calculator UK
Add VAT, remove VAT from a gross amount, calculate the VAT portion, or compare configured UK VAT rates with a custom rate.
Gross amount
£120.00
Applied VAT rate: 20.00%
- Net amount
- £100.00
- VAT amount
- £20.00
- Gross amount
- £120.00
How to use this VAT calculator
Choose whether to add VAT to a net amount, remove VAT from a gross amount, calculate the VAT portion of a gross amount, or compare configured rates. You can select a common rate or enter a custom decimal rate.
Methodology
The calculator treats the VAT rate as a decimal multiplier and rounds final displayed values to your selected precision.
Formula
gross = net * (1 + vat_rate)
net = gross / (1 + vat_rate)
vat = gross - netExample
At 20% VAT, a £100 net amount becomes £120 gross. A £120 gross amount contains £20 VAT and £100 net value.
Important considerations
VAT liability depends on what is supplied, where it is supplied, customer status, registration, exemptions, reverse-charge rules, and invoice requirements.
FAQs
Are VAT rates hardcoded here?
No. Common UK rates come from centralized configuration and the custom input lets you model decimal rates.
Does zero VAT work?
Yes. A 0% rate returns the same net and gross amount with a zero VAT amount.
Related tools
Freelance Invoice Generator, Project Pricing Calculator, and Late Payment Interest Calculator.
Disclaimer
This tool is for arithmetic only and is not tax, VAT, accounting, or legal advice.