Adding a percentage
Multiply the amount before tax by your rate, then add the tax to the original amount.
net × (1 + rate ÷ 100)
VAT, GST & sales tax calculator
Add tax or work backwards from a total. See every number, every step.
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Enter the rate applicable to your transaction. No official rate is applied automatically. The initial 10% is an illustrative manual input, not an official country rate.
Before tax
Original amount
Tax amount%
Calculated from your rate
Total including tax
Before tax + tax amount
1,000.00 + 100.00 = 1,100.00 GBP
Sources & country guide (EN)
Manual arithmetic only. Country-specific calculation is not available here. Currency selection does not convert amounts.
Where the total goes
1,100.00 GBPBefore tax90.91%Tax amount9.09%
See the calculation
The calculation, step by step
Manual example: amounts rounded to 2 decimal places, half up. Legal rounding rules can differ.
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Compare amounts
| Input amount | Tax amount | Total including tax |
|---|
This calculator handles a single percentage you enter. It does not determine the legal rate, taxability, exemptions or combined local taxes.
Official rate data: awaiting review
ONE PLATFORM. TWENTY COUNTRIES.
Find your country
Choose a currency and local tax context. All calculations currently use a rate you enter.
No matching countries.
20 / 20 countries shown
A LITTLE CLARITY GOES A LONG WAY.
Know what is in your total.
Finding the amount before tax
Divide the total by one plus your rate. Subtract that amount from the total to find the included tax.
total ÷ (1 + rate ÷ 100)
A clear line between arithmetic and tax advice.
A correct formula cannot tell you which tax rate applies. Official country presets will only be available after source verification and review.
Sources & country guide (EN)Read our calculation methodology