The formula
Tax = price × rate ÷ 100, and the total is the price plus that tax. To work backwards from a tax-inclusive total, divide it by (1 + rate ÷ 100). At 8.25%, a $49.99 item carries $4.12 of tax and costs $54.11 at the register.
Worked examples
| Price | Rate | Tax | Total |
|---|---|---|---|
| $49.99 | 8.25% | $4.12 | $54.11 |
| $120.00 | 6% | $7.20 | $127.20 |
| $15.00 | 0% | $0.00 | $15.00 |
| $250.00 | 10% | $25.00 | $275.00 |
Rates stack, and they differ by item
A state rate, a county rate and a city rate are usually added together into one combined rate — enter that combined figure, not just the state rate. Some goods, such as groceries or clothing under a threshold, are taxed at a reduced rate or not at all, so the rate on the receipt can legitimately differ from the headline rate for the area.
Apply discounts before tax
Sales tax is normally charged on the price after any discount, not before it. Get the sale price from the Discount Calculator first, then bring that number here.
Frequently asked questions
How do I remove tax from a total?
Use the second panel. Divide the total by 1 plus the rate, which is what the calculator does.
Where do I find my rate?
On a recent receipt, or from your state and local tax authority. This page does not look up rates.
Does this handle tax-inclusive pricing?
Yes — the reverse panel strips a known rate back out of a total.