Sales Tax Calculator

Enter a pre-tax price and your local sales tax rate, and the calculator shows the tax and the amount you will actually hand over at the register. It is built for US shopping, where the shelf price and the checkout price are almost never the same number. The default rate of 8.25% is the combined maximum across much of Texas — 6.25% state plus up to 2% local — and a realistic figure for a large part of the country. Read the two outputs together: the first line is the tax the retailer collects on the state's behalf, and the second is the total you pay.

How the math works

Sales tax is a straight percentage of the pre-tax price:

tax = price × rate ÷ 100

The total is the price plus the tax. With the defaults — 89.99 at 8.25% — the tax is 89.99 × 0.0825 = 7.424175, shown as 7.42, and the total is 97.414175, shown as 97.41. This is the same percentage method every state revenue agency prescribes; the Texas Comptroller and the California Department of Tax and Fee Administration both publish it in their retailer guides. The calculator keeps full precision internally and rounds only for display, so the two outputs always reconcile.

Two rounding details matter in practice. States instruct retailers to compute the tax on the full taxable amount and round the result to the nearest cent, rather than rounding each item, which is why a receipt total can differ by a penny from adding up line-by-line taxes. And to strip tax out of a total that already includes it, divide by one plus the rate written as a decimal: 97.41 ÷ 1.0825 returns 89.986, which is 89.99 to the nearest cent. Expense reports that need the pre-tax figure lean on that reverse calculation, and the same trick recovers the base price from any tax-inclusive receipt.

A tax older than Rome

Taxing the sale of goods is one of the oldest ideas in public finance. Scenes painted on Egyptian tomb walls dated to around 2000 BC show duties levied on commodities such as cooking oil. In 415 BC the Athenian port of Piraeus recorded a one percent charge on a slave auction, and by roughly 399 BC Athens was collecting two percent on imports and exports. The clearest ancestor of the modern rate arrived under the Roman emperor Augustus, who in AD 6 imposed the centesima rerum venalium, a one percent general tax on goods sold at auction whose Latin name means a hundredth of the value of everything sold. The revenue helped fund a military pension scheme. Tiberius later halved it to a ducentesima, one two-hundredth, and Caligula remitted even that across Italy — an early demonstration that consumption taxes are as easy to cut as to impose.

How the American sales tax was born in a crisis

The tax printed on your receipt is far younger. Before the First World War almost no government ran a broad tax on retail sales; public finance leaned on tariffs, property taxes and excise duties on particular goods such as alcohol and tobacco. West Virginia broke from that pattern on 1 July 1921 with a levy on the gross receipts of business, the tax later known as the business and occupation tax and often called the country's first general sales tax; it replaced the state's corporate excise tax and a separate tax on gas pipelines. Georgia adopted a general tax on business gross receipts in 1929. Then the Great Depression turned a curiosity into a fiscal lifeline. As property values collapsed, the property-tax revenue that funded schools and local government collapsed with them, and states needed a base that still produced money when land values and incomes did not. Spending on everyday goods held up better than either. Mississippi went furthest. Its 1930 gross receipts tax was rewritten on 26 April 1932 into a two percent charge collected from the shopper at the register, and that version is the one usually named the first modern retail sales tax in the country. Kentucky had taxed retail gross receipts from 1930 as well, then repealed the tax in 1936. The design spread quickly: in 1933 alone eleven more states, among them Illinois, California and Michigan, adopted sales taxes of their own, while New York State ran a one percent emergency sales tax that was allowed to lapse after a year and did not return as a permanent statewide tax until 1965. What began as an emergency measure became permanent, and today the sales tax funds a large share of state budgets across the country.

Why your rate is rarely the state rate

Most US addresses stack a county, city and sometimes a transit-district rate on top of the state rate, so the number on your receipt is a combined figure. A few real examples:

California's 7.25% is the highest state-level base, yet many of its cities land above 9.5% once local taxes stack. Colorado sits at the other extreme with a 2.9% state rate, though Denver's combined rate has stood at 9.15% since January 2025. Because the rate depends on the exact address of the sale, and there are more than 13,000 taxing jurisdictions nationwide, no single number covers the country. If you do not know your combined rate, the fastest source is the last receipt in your pocket, where the figure is already printed for you.

Added at the register, not on the shelf

The US approach differs from most of the world. In the UK, VAT of 20% is already inside the price tag; across the EU, standard VAT rates of 17% to 27% are likewise tax-inclusive, so the sticker is what you pay. Australia folds its 10% GST into displayed prices too. That inclusive model is itself a modern invention: Maurice Lauré, joint director of the French tax authority, is credited with devising the modern value-added tax, first applied on 10 April 1954, and by 2025 some 175 of the 193 United Nations member states levied one. Canada is the closest match to the US system — the 5% federal GST and any provincial tax are added at the register, with combined HST reaching 15% in parts of the Atlantic provinces — so Canadian shoppers can use this calculator with their local rate directly. Visitors to the US are routinely caught out by the difference, since an 89.99 price tag quietly becomes 97.41 at checkout.

Groceries, prescription drugs and clothing are exempt or taxed at reduced rates in many states, so do not assume one rate covers everything in your cart. The calculator applies the single rate you enter, which is exactly right for a taxable item at a known combined rate; a real basket that mixes taxable and exempt goods needs each category handled separately.

Rates quoted here change as states and cities amend them, so confirm the current rate with your state revenue department before relying on a figure. See the site disclaimer.

Frequently asked questions

How do I find the sales tax rate where I live?

Look at any recent store receipt — the rate printed there is your combined state, county, city and district rate. You can also search your state revenue department's rate lookup by address. The combined figure is what matters: California's statewide minimum is 7.25%, but an address in Los Angeles County pays 9.5% or more.

Which US states have no sales tax?

Five states charge no statewide sales tax: New Hampshire, Oregon, Montana, Alaska and Delaware, often remembered by the acronym NOMAD. Alaska is the partial exception — the state itself charges nothing, but boroughs and cities can add their own tax, reaching around 7% in some towns.

Why do US shelf prices not include sales tax?

Because the rate depends on where the sale happens, and there are more than 13,000 taxing jurisdictions across the country. A retailer advertising one nationwide price cannot bake in a tax that ranges from 0% in Portland, Oregon to 10.25% in Chicago. VAT countries can print tax-inclusive prices because one national rate applies everywhere.

How do I remove sales tax from a total that already includes it?

Divide the total by one plus the rate as a decimal. A receipt total of 97.41 at an 8.25% rate works back to 97.41 ÷ 1.0825 = 89.99 before tax. This is the standard method for expense reports that need the pre-tax figure.

Do I pay sales tax on online orders?

Almost always, since the Supreme Court's South Dakota v. Wayfair decision in 2018. Sellers above a state's economic threshold — commonly 100,000 dollars in annual sales — must collect tax based on your delivery address, at the same combined rate your local stores charge.