Need to work out how much VAT is included in a gross amount? Or calculate the total including VAT from a net figure? Our VAT reverse calculator makes it simple to calculate VAT in both directions using the current UK rates.
Our VAT reverse calculator helps you quickly determine the VAT component within a price or add VAT to a net amount. This is particularly useful for businesses that need to calculate VAT for invoicing, expense claims, or financial reporting.
Whether you're trying to work backwards from a gross amount to find out how much VAT is included, or you need to add VAT to a net figure, this calculator makes it simple and accurate.
A VAT reverse calculation is used when you have a total amount (gross) and need to work out the original amount before VAT (net) and the VAT portion itself. The formula for this is:
Net Amount = Gross Amount ÷ (1 + VAT Rate)
For example, if you have a gross amount of £120 and the VAT rate is 20%, the net amount would be £120 ÷ 1.2 = £100, and the VAT would be £20.
As of 2025, the UK has several VAT rates that apply to different goods and services:
Always check the current HMRC guidelines to confirm the appropriate VAT rate for your specific goods or services.
Calculating VAT manually can be prone to errors, especially when working backwards from a VAT-inclusive amount. Our calculator ensures accuracy and saves you time.
Whether you're a small business owner, accountant, or just someone trying to understand the VAT breakdown of a purchase, this tool makes the process straightforward and reliable.
The calculator supports all current UK VAT rates and even allows you to enter custom rates for special circumstances or historical calculations.
Simply input your amount, select the appropriate VAT rate, and instantly see the breakdown of VAT and net amounts. You can even copy the results with one click for your records or reports.