How do you add sales tax to a price?

Multiply the net price by the tax rate to get tax amount, then add it to the net price.

How do you remove tax from a total price?

Divide the tax-included total by one plus the tax rate. The result is the net price before tax.

Money calculator

Sales Tax Calculator

Add tax to a net price, remove tax from a tax-included total, or reverse-calculate tax rate from net and gross prices. Works for sales tax, VAT, GST, and similar consumption taxes.

Tax calculator

Add or remove tax

gross = net x (1 + rate)

Add tax Remove tax

Tax preset

Net amount Tax rate %

Net amount$100.00

Tax rate8.25%

Tax amount$8.25

Gross amount$108.25

Reverse tax rate calculator

Use net amount and gross amount to find the effective tax rate and tax amount.

Net amount Gross amount

Tax amount$8.25

Tax rate8.25%

Net / gross ratio92.38%

Split total with tax

Estimate per-person cost when a receipt total includes tax.

Total with tax People

Each person pays$54.132 people split $108.25

Sales tax formulas

Question	Formula	Example
Add tax	gross = net x (1 + rate / 100)	$100 at 8.25% = $108.25
Tax amount	tax = net x rate / 100	$100 x 8.25% = $8.25
Remove tax	net = gross / (1 + rate / 100)	$108.25 / 1.0825 = $100
Reverse rate	(gross - net) / net x 100	$8.25 / $100 x 100 = 8.25%

Example

If a pre-tax price is $100 and the sales tax rate is 8.25%, tax is $8.25 and the total price is $108.25. If $108.25 already includes tax, removing 8.25% tax gives a net price of $100.

FAQ

Is sales tax the same as VAT or GST?

They are all consumption taxes, but the legal rules differ by country and region. This calculator handles the arithmetic for adding or removing a percentage tax.

How do I remove tax from a total?

Divide the tax-included total by 1 plus the tax rate as a decimal. For 8.25%, divide by 1.0825.

Are preset tax rates official?

No. Presets are examples for quick testing. Always verify the current local rate for production use.