About the Sales Tax Calculator
The Sales Tax Calculator computes the total cost of a purchase in any U.S. state, surfaces the pre-tax price from a known post-tax total (the reverse-tax calculation cashiers and accountants need constantly), and shows the state-plus-local combined rate side-by-side with the state-only portion. The bundled lookup table covers all fifty states plus the District of Columbia and the five states with no statewide sales tax.
It is built for online shoppers comparing list prices across state lines, small-business owners pricing in multi-state markets, accountants reconciling receipts where the printed tax field is illegible, travelers stress-testing trip budgets, and anyone moving cities who needs to know what the new sales-tax burden looks like in absolute dollars on a typical monthly spend.
Every calculation runs locally in your browser. The state-and-local rate table is bundled as static JSON on initial load; subsequent calculations require no network call. Purchase amounts, state selections, and reverse-tax queries are not transmitted to any server. There is no analytics tag inside the calculator itself — it does not need one to work.
Sales tax is genuinely complicated. The bundled rate table reflects state-level rates plus a representative local rate, but actual combined rates can vary block by block in California, Louisiana, and several other home-rule states. Certain product categories (groceries, prescription drugs, clothing under a price ceiling) are exempt or partially taxed in many states. For a binding figure on an invoice, query your state revenue department’s ZIP-code lookup.
Add multiple items and mark each as taxable or tax-exempt. See the total tax, total due, and per-item breakdown.
See which categories (groceries, clothing, electronics, medicine) are taxed in your selected state with applicable exemptions and special rates.
Compare sales tax across up to 3 states side-by-side. See total cost differences on your purchase amount.
Sales Tax Rates by State (Complete 2026 Table)
Sales tax rates across the United States vary dramatically depending on where you shop. Every state sets its own base rate, and most allow cities and counties to stack additional local taxes on top. The combined rate — what you actually pay at the register — can differ by nearly ten percentage points between the cheapest and most expensive jurisdictions. Louisiana and Tennessee tie for the highest combined average at 9.55%, while five states impose no state-level sales tax at all. Knowing the combined rate for your location helps you budget more accurately and avoid surprises at checkout.
The table embedded in this calculator reflects 2026 combined state-plus-average-local rates compiled from state revenue departments. Keep in mind that your exact rate may differ slightly because local jurisdictions can change their levies independently of the state. If you need a precise rate for a specific zip code, check your state department of revenue website or use the custom rate field above.
How to Calculate Sales Tax on Any Purchase
The forward sales tax formula is straightforward: multiply the item price by the tax rate expressed as a decimal. If you are buying a $49.99 item in a jurisdiction with an 8.25% combined rate, the tax is $49.99 × 0.0825 = $4.12, making the total $54.11. This calculator handles the math instantly, but understanding the underlying arithmetic is useful when you want to estimate totals in your head while shopping.
A quick mental shortcut: for every one percent of tax, the cost per hundred dollars increases by one dollar. An 8% rate adds roughly $8 per $100 spent. Round your purchase to the nearest hundred, multiply by the rate, and you will have a close estimate before reaching the register. For precision — especially on large purchases like electronics or appliances — use the calculator above and enter your exact local rate.
Reverse Sales Tax: Finding the Pre-Tax Price
Sometimes you know the total you paid and need to figure out the original price before tax. This is common when reconciling receipts, filing expense reports, or verifying that a store charged the correct rate. The reverse formula divides the total by one plus the tax rate as a decimal: pre-tax price = total ÷ (1 + rate). For example, if you paid $107.77 and the tax rate is 7.77%, the pre-tax price is $107.77 ÷ 1.0777 = $100.00.
Switch the calculator above to “Remove Tax” mode to perform this calculation automatically. Enter the total amount you paid, select your state or type a custom rate, and the tool instantly shows the original price and the tax portion embedded in that total. This is especially helpful for freelancers and small business owners who need to separate tax from gross receipts for bookkeeping.
States With No Sales Tax
Five states — Oregon, Montana, New Hampshire, Delaware, and Alaska — do not impose a state-level sales tax. Residents and visitors shopping in these states enjoy lower prices at the register, which can add up to meaningful savings on large purchases. Oregon in particular has become a popular destination for cross-border shoppers from Washington State, where the combined rate averages over 9%.
However, “no state sales tax” does not always mean “no sales tax.” Alaska allows local municipalities to levy their own sales taxes, and some boroughs charge rates as high as 7.5%. Montana similarly permits certain resort communities to impose a local option tax. Always check the local rate for the specific city or county where you are making a purchase, even in a nominally tax-free state.
Why Sales Tax Rates Vary So Much by Location
Sales tax is a patchwork system because it is governed at the state level, not the federal level. Each state legislature decides whether to levy a sales tax, sets the base rate, and determines which goods and services are taxable. On top of that, most states grant cities, counties, and special districts the authority to add their own surcharges for transit, stadiums, infrastructure, and other local priorities. The result is more than 13,000 distinct tax jurisdictions across the country, each with its own rate.
Exemptions add another layer of complexity. Many states exempt groceries, prescription drugs, and clothing from sales tax, but definitions vary. In New York, clothing items under $110 are exempt; in neighboring Pennsylvania, all clothing is exempt regardless of price. Some states tax digital downloads while others do not. These category-level differences mean the effective tax burden depends not just on where you shop, but on what you buy. Use the state selector above to see combined rates, and check the subscriber-only category guide for item-level exemption details.
Looking for more everyday math tools? Try the Tip Calculator for restaurant bills or the Percentage Calculator for any proportion. Browse all Everyday Calculator tools for more free calculators.
Frequently Asked Questions
How do I calculate sales tax?
Multiply the pre-tax price by the tax rate as a decimal. A $50 item at 7% tax is 50 times 0.07, which equals $3.50 in tax, for a total of $53.50. This calculator does it instantly and can also reverse-calculate the subtotal from a known total.
Which US states have no sales tax?
Five states have no statewide sales tax: Oregon, Montana, New Hampshire, Delaware, and Alaska. Note that some cities in Alaska and Montana levy their own local sales tax, so shopping tax-free there is not guaranteed.
Which states have the highest sales tax?
As of 2026, Louisiana and Tennessee tie for the highest combined average at roughly 9.55%, followed by Arkansas, Washington, and Alabama. These figures include the average local rate stacked on top of the state rate.
Do I pay sales tax on online purchases?
Yes, in most cases. Since the 2018 Supreme Court decision in South Dakota v. Wayfair, online retailers must collect sales tax in states where they meet economic nexus thresholds, regardless of physical presence. Tax is based on the shipping destination.
How do I find my exact local sales tax rate?
Check your state's department of revenue website, which usually has a rate lookup by ZIP code or address. You can also look at a recent receipt from a local store to see the exact combined rate you paid.