Sales Tax Calculator

When this calculator helps

Use this calculator whenever you have a pre-tax price and need to know what a customer actually pays once sales tax is added. In the US that is the standard way prices are quoted — the shelf price or the quote is the pre-tax figure, and tax is tacked on at the register. It is handy for ringing up a sale, putting together an estimate, building a checkout total, or just checking that a receipt's tax line looks right for your area.

Because rates differ so much from one place to the next, the calculator lets you type in whatever combined state-and-local rate applies to you rather than assuming a national figure. Set your city or county rate once and it shows the tax to add and the grand total. If you are in one of the states with no statewide sales tax, you can simply enter a 0% rate, or your purely local rate where one exists.

How to read your result

Adding sales tax produces three figures worth understanding. The pre-tax amount is the price of the goods or service itself — the part the seller actually earns and reports as revenue. The tax amount is what you have added on top; for a business, that money is collected on behalf of the state and local tax authorities and remitted to them, not kept. The total is what the customer hands over: pre-tax plus tax combined.

Unlike a lot of the world, US prices are almost always shown pre-tax, so the tax line on a receipt is the calculator's tax amount and the bottom line is its total. Keeping the two separate matters at filing time, when a business reports taxable sales and the tax it collected to each jurisdiction it owes.

A worked example

Say you are selling an item priced at $200 and your combined state-and-local rate is 8.25% (close to the rate in much of Texas). The tax is $200 × 0.0825 = $16.50, so the customer pays $216.50 at checkout. Move that same sale to a location with an 8.875% rate, like New York City, and the tax rises to $17.75 for a total of $217.75. Sell it in Oregon, which has no sales tax at all, and the customer simply pays $200 — which is why the rate you enter has to match the buyer's location.

Common mistakes to avoid

Most sales-tax slip-ups come from the rate itself rather than the arithmetic, because the rate genuinely changes street by street.

• Using the state rate alone and forgetting the county or city add-on — the combined rate is what the customer actually pays, and it is often a point or two higher.
• Confusing adding tax with removing it: taking 8% off an $108 total does not return you to $100 (it gives $99.36). To back tax out, divide the total by 1 plus the rate.
• Charging tax on exempt items — many states exempt unprepared groceries or prescription drugs, where the effective rate is 0%.
• Assuming a single rate applies everywhere you sell. Destination-based states tax at the buyer's location, so an online seller may owe different rates on different orders.

Sales tax in the US, and how it differs from VAT

There is no VAT in the United States. Instead, consumption tax is levied as sales tax, set independently by states and by local jurisdictions layered on top, which is why a single national figure does not exist. Five states — Alaska, Delaware, Montana, New Hampshire and Oregon — have no statewide sales tax, though Alaska allows local sales taxes. Elsewhere, combined state-and-local rates commonly land somewhere around 5% to 10%, and you have to look up the specific city or county to be exact.

The deeper difference is structural. US sales tax is single-stage: it is charged just once, at the final retail sale to the consumer, and businesses buying for resale generally do not pay it. VAT, used across the UK and EU, is multi-stage — it is charged and reclaimed at every step of the supply chain, so the tax accumulates gradually rather than all at the end. The everyday maths of adding a percentage is the same, which is why this tool serves both, but the systems behind them are not interchangeable.