Result
Finance calculations are estimates based on the values and assumptions you enter. They are not financial, tax, lending or investment advice. Verify the terms, rates, fees and local rules that apply to your situation.
About this tool
Sales Tax Calculator
Calculate sales tax from a before-tax price or recover the before-tax price and tax component from a tax-inclusive total. Enter the rate that applies to the transaction because tax rules vary by jurisdiction and product.
What This Sales Tax Calculator Does
Calculate before-tax price, tax amount and after-tax price from a price and tax rate.
Inputs and What They Mean
Choose whether the amount you know is before tax or already tax-inclusive. Enter the amount and the applicable tax rate. The calculator derives the other values.
How the Calculation Works
For a tax-exclusive price, tax equals the base amount multiplied by the rate and the final price is base plus tax. For a tax-inclusive amount, the pre-tax base is total divided by one plus the tax rate, with the remainder treated as tax.
How to Use the Calculator
- Enter the values that describe your situation.
- Check the units, frequency and assumptions shown beside each field.
- Choose any available mode or calculation target before calculating.
- Select Calculate and review the result card.
- Change one assumption at a time when comparing scenarios.
How to Interpret the Result
Use the tool when comparing quoted prices or checking an invoice calculation. Be careful when a jurisdiction applies multiple taxes, exemptions, thresholds or special treatment to particular goods and services.
Important Assumptions and Limitations
Tax rates and rules vary by country and subnational jurisdiction. Tervilo requires the applicable rate as an input and does not claim to maintain a universal tax-rate database.
Practical Planning Tip
Use the calculator as a scenario-testing tool. Save or compare a conservative case, a base case and a more optimistic case instead of relying on a single projection. For financial decisions, verify rates, fees, taxes, contractual terms and local rules with the relevant provider or official source.
Questions & Answers
Frequently Asked Questions
Do sales tax and VAT rates vary by country?
Yes. Rates, exemptions, tax bases and rules vary by jurisdiction. Enter the applicable rate and verify it with the relevant authority.
Can I calculate tax from a tax-inclusive total?
Yes. Choose the after-tax mode to estimate the before-tax price and tax component from a total and rate.