Our Reverse VAT calculator can help to get accurate vat results for people in the UK and other regions. It helps businesses and individuals work backward from a gross (including VAT) amount to find the net (before VAT) amount and the exact VAT amount included.
Reverse VAT Calculator
VAT Rate: 0%
Net Amount: 0
VAT Amount: 0
Gross Amount: 0
Here's key points why it is important
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Transparency in Financial Reporting
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Assists Non-VAT Registered Individuals and Businesses
Saves Time and Reduces Errors
Follow this simple step-by-step guide to calculate VAT accurately—whether you want to add or remove it.
Enter the Amount
In the calculator, you'll see an input field where you can enter the amount you want to calculate VAT for.
- If adding VAT: Enter the net amount (before VAT) in the field.
- If removing VAT: Enter the gross amount (including VAT) in the field.
Adjust the VAT Rate
The calculator displays a VAT rate slider, set to 20% by default. You can adjust it by moving the slider left or right.
- The VAT rate range is 7.5% to 25%—set it to any value within that range.
- As you move the slider, the percentage value updates on screen in real time.
Choose Add or Remove VAT
After entering the amount and setting the VAT rate, choose which operation you want to perform:
- Add VAT — Adds the VAT percentage to the net amount to get the gross total.
- Remove VAT — Extracts the VAT from the gross amount to find the net price.
View Results
Once you click either button, the results are displayed instantly in the breakdown section below:
Net Amount
Price before tax
VAT Amount
Calculated tax value
Gross Amount
Total inclusive price
Calculate Again
Once you have your results, click the Reset button at the bottom of the calculator. This clears all fields and results so you can start a fresh calculation instantly.
A complete breakdown of the formulas and logic used to add or remove VAT—with worked examples for each.
Key Terms
Net Amount
The original price before VAT is added. This is the base amount used in calculations.
Gross Amount
The total price after VAT has been added. This includes both net amount and the tax element.
VAT Amount
The value of tax applied—calculated as the mathematical difference between gross and net amounts.
VAT Rate
The percentage rate applied (e.g., 20% standard UK rate). Adjustable via the slider or presets.
Net Amount → Gross Amount
Use this formula when you have a price before tax and want to find the total inclusive price.
Worked Example (Net £100 @ 20%)
Gross Amount → Net Amount
Use this formula when you have a VAT-inclusive total price and want to extract the base net price.