Reverse VAT Online

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

Reverse VAT Calculator

VAT Rate: 0%


Net Amount: 0

VAT Amount: 0

Gross Amount: 0

Key Points

Here's key points why it is important

Quickly access our most used calculators for academic and financial planning.

Transparency in Financial Reporting

Pricing Accuracy

Simplifies Billing and Invoicing

Efficient Tax Deduction Calculations

Assists Non-VAT Registered Individuals and Businesses

Saves Time and Reduces Errors

How to Use This VAT Calculator

How to Use VAT Calculator

Follow this simple step-by-step guide to calculate VAT accurately — whether you want to add or remove it.

1

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 you want to calculate VAT based on a net amount (before VAT), enter the net amount in the field.
If you want to calculate VAT based on a gross amount (including VAT), enter the gross amount in the field.
2

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.
Tip: You can also type the VAT rate directly into the input field above the slider — the slider will sync automatically.
3

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.
4

View Results

Once you click either button, the results are displayed instantly below:

Net Amount
The price before VAT — either entered by you or calculated from the gross.
VAT Amount
The VAT value calculated based on the rate you selected.
Gross Amount
Total amount after VAT is added, or the starting gross if removing VAT.
Calculation Based On
Shows whether the result used a net or gross amount as the base.
5

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.

How This Reverse VAT Calculator Works

How This VAT Calculator Works | Reverse VAT Formula Explained

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 VAT.

VAT Amount

The value of tax applied — calculated as the difference between gross and net amounts.

VAT Rate

The percentage rate applied (e.g. 20%). Adjustable via the slider in the calculator.

Adding VAT

Net Amount → Gross Amount

Use this when you have a price before VAT and want to find the total.

Formula

Gross Amount
Net × (1 + VAT Rate)
e.g.  100 × (1 + 0.20) = £120
  • Net Amount — the amount before VAT, entered by you.
  • VAT Rate — e.g. 20% is written as 0.20 in the formula.
  • Gross Amount — the total price after adding VAT.
  • VAT Amount = Gross Amount − Net Amount

Worked Example

Net Amount £100
VAT Rate 20% (0.20)
VAT Amount £20
Gross Amount £120
Gross = 100 × (1 + 0.20)
Gross = 100 × 1.20
Gross = £120
VAT Amount = £120 − £100 = £20
Removing VAT

Gross Amount → Net Amount

Use this when you have a VAT-inclusive price and want the original base price.

Formula

Net Amount
Gross ÷ (1 + VAT Rate)
e.g.  120 ÷ (1 + 0.20) = £100
  • Gross Amount — the total price including VAT, entered by you.
  • VAT Rate — e.g. 20% is written as 0.20 in the formula.
  • Net Amount — the original price before VAT was applied.
  • VAT Amount = Gross Amount − Net Amount

Worked Example

Gross Amount £120
VAT Rate 20% (0.20)
Net Amount £100
VAT Amount £20
Net = 120 ÷ (1 + 0.20)
Net = 120 ÷ 1.20
Net = £100
VAT Amount = £120 − £100 = £20

OperationYou EnterFormula UsedResult
Add VATNet AmountNet × (1 + Rate)Gross Amount + VAT Amount
Remove VATGross AmountGross ÷ (1 + Rate)Net Amount + VAT Amount
VAT AmountEitherGross − NetTax portion only