Calculators Reference

Sales Tax Formula Reference

The core sales tax formula, for quick reference.

Brekzy Team Published September 8, 2026

The core sales tax formula for quick reference. For why rates vary and how discounts factor in, see How Sales Tax Is Calculated.

Sales Tax = Price × Tax Rate
Total Price = Price + Sales Tax

Sales tax rates are set locally and vary by country, state, and sometimes city, there’s no single rate that applies everywhere. Always confirm the correct rate for your specific location before relying on a calculation.

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Frequently Asked Questions

Is there a universal sales tax rate?

No, rates are set locally and vary significantly by jurisdiction.

How do I find the pre-tax price from a tax-included total?

Divide the total by (1 + the tax rate as a decimal).

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