How this calculator works
Adding tax multiplies a net price by one plus the rate. Removing tax divides a gross price by the same factor; simply subtracting the rate from a gross total would be wrong. This is one percentage-based tax, without exemptions, compound taxes or invoice rounding rules.
The formula
Gross = Net × (1 + rate/100)
Net = Gross / (1 + rate/100)
Tax = Gross − Net.A quick example
At 10%, a before-tax price of 100 becomes 110. Removing 10% tax from 110 returns net price 100 and tax 10.
How to use this calculator
- Choose Add tax or Remove tax.
- Enter the net or inclusive price as appropriate and your tax rate.
- Calculate before-tax price, tax amount and after-tax price.
A few common questions
Why not subtract 10% from a tax-inclusive price?
The tax percentage was applied to the net price, so use division by 1.10 to recover that base.
Is a local tax rate prefilled?
No. The default is zero; supply the rate that applies to your situation.
Does this calculate several taxes?
No. It models one percentage rate and does not determine legal tax obligations.