What is the average US sales tax rate?

The average combined state and local sales tax rate in the US is approximately 7.12% as of 2026. Rates range from 0% (Oregon, Montana, Delaware, New Hampshire) to over 10% in parts of Louisiana, Tennessee, and Arkansas.

Why is reverse calculation different from just using the tax rate?

Because the tax rate is based on the pre-tax price, not the total. If an item costs $100 with 10% tax, the total is $110. Taking 10% of $110 gives $11, which is incorrect. The reverse formula ($110 / 1.10 = $100) gives the correct pre-tax amount.

Tax & Payroll

Sales Tax Reverse Calculator

Extract sales tax from a total price or add tax to a pre-tax price using any state or local tax rate.

Sales Tax Calculator

Total Price (Tax Included) ($)

Sales Tax Rate (%)

Results

Enter a price and tax rate, then click calculate.

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Add this free calculator to your blog, website, or CMS with a simple copy-paste embed code.

Introduction

This Sales Tax Reverse is designed for professionals who need accurate and reliable calculations in their daily work. Whether you are planning finances, managing projects, or making critical business decisions, having the right numbers at your fingertips is essential. This tool provides instant results based on proven formulas, saving you time and reducing the risk of manual calculation errors. By using this calculator, you can focus on analysis and decision-making rather than spending time on complex computations. The interface is straightforward and designed for practical use, ensuring that you get the information you need quickly and efficiently.

What This Calculator Does

This calculator performs two key sales tax functions: extracting the pre-tax price and tax amount from a tax-inclusive total (reverse calculation), and adding sales tax to a pre-tax price (forward calculation). It works with any state, local, or combined sales tax rate.

The Formula

Reverse: Pre-Tax Price = Total / (1 + Rate) | Forward: Total = Pre-Tax Price x (1 + Rate)

When tax is already included in the price, you cannot simply multiply by the tax rate to find the tax amount. Instead, divide the total by (1 + tax rate as a decimal) to extract the original price. The difference is the tax. For adding tax, multiply the pre-tax price by (1 + rate).

Step-by-Step Example

Choose calculation mode

Select "Extract Tax" to find the pre-tax price from a total, or "Add Tax" to calculate the total from a pre-tax price.

Enter the price

For reverse calculation, enter the tax-inclusive total (e.g., $106.25). For forward, enter the pre-tax price (e.g., $100.00).

Enter the tax rate

Use your combined state and local sales tax rate. Example: 6.25% for Texas, 8.875% for New York City.

Review results

See the pre-tax price, tax amount, total, and effective tax rate clearly broken down.

Real-World Use Cases

Bookkeeping and Accounting

Separate tax from receipts where only the total is shown, ensuring accurate tax liability records.

Retail Pricing

Determine what pre-tax price to set when you want the tax-inclusive total to hit a specific price point.

Expense Reporting

Extract deductible sales tax from business purchase receipts for tax return preparation.

Common Mistakes to Avoid

Multiplying a tax-inclusive total by the tax rate to find the tax amount. This overstates the tax because the rate should be applied to the pre-tax amount, not the total.
Using the state rate alone when a local jurisdiction adds additional tax. Always use the combined rate.
Confusing tax-inclusive and tax-exclusive pricing. In the US, posted prices typically exclude sales tax; in many other countries, prices include tax.

Frequently Asked Questions

Accuracy and Disclaimer

Sales tax rates vary by state, county, city, and product type. Some items may be tax-exempt or subject to reduced rates. Verify applicable rates with your state or local tax authority for accurate calculations.

Conclusion

This calculator provides a reliable way to perform essential calculations for your professional needs. The results are based on standard formulas and should be used as estimates for planning and analysis purposes. For critical decisions, especially those involving financial, legal, or medical matters, it is always advisable to verify results with a qualified professional. Use this tool as part of your broader decision-making process, and explore related calculators on this platform to support your comprehensive planning needs. Regular use of accurate calculation tools helps ensure consistency and precision in your professional work.