Sales Tax Calculator

Say you are buying a $100 item in a location with a combined 8.25% sales tax rate. The tax is $100 × 0.0825 = $8.25, so the total at the register is $108.25. Run it the other way - you paid $108.25 and want the pre-tax price - and you divide by 1.0825 to get back to exactly $100.00. This sales tax calculator handles both directions: add tax to a listed price, or remove it from a total you already paid.

Because the United States has no national sales tax, the rate you owe depends entirely on where the sale happens. State rates, county rates, city rates and special-district rates stack into one combined rate - which is why this tool asks you to enter the rate rather than guessing it. Figures and rules described here are for the 2025 tax year.

The sales tax formulas

Here rate is the combined sales tax rate written as a decimal (8.25% = 0.0825). The reverse formula matters because the tax is charged on the pre-tax price, not on the total - so you cannot simply subtract 8.25% of the total to undo it.

How sales tax works in the U.S.

There is no federal sales tax in the United States; it is a state and local matter. As of the 2025 tax year, five states levy no statewide general sales tax - Alaska, Delaware, Montana, New Hampshire and Oregon - though some Alaskan localities still add a local tax. Everywhere else, the combined rate commonly lands between about 4% and 10%+, depending on the city and county.

When does a different rate apply?

Many states tax certain goods at a reduced rate or exempt them entirely - groceries, prescription medication, and in some states clothing are common examples. Other purchases, like prepared food or hotel stays, can carry extra special-district taxes. This calculator applies one rate to the whole amount, so for a mixed basket, calculate the taxable and reduced-rate items separately.

Sales tax and your federal return

If you itemize deductions, the IRS lets you deduct either state and local income taxes or state and local general sales taxes - not both - subject to the overall SALT cap. You can use your actual receipts or the IRS optional sales tax tables. Use this calculator to total the sales tax on big-ticket purchases, then confirm the current deduction rules for the 2025 tax year on IRS.gov. If you live in a state with no income tax, the sales tax deduction is usually the only one of the two worth claiming; to size up the income-tax side of that choice, run the numbers through the Income Tax Calculator.

How to use this sales tax calculator

You only need two numbers to get an answer. Work through the calculator like this:

1. Pick a mode: choose Add tax when you have a pre-tax price and want the total, or Remove tax (reverse) when you have a receipt total and want to back out the pre-tax price.
2. Enter the amount: type the listed price (add mode) or the amount you actually paid including tax (reverse mode).
3. Enter the combined rate: type the full state-plus-local rate as a percentage, such as 8.25. Look it up for the exact location of the sale - the store's city and county, not just the state.
4. Read the breakdown: the calculator shows the tax amount, the pre-tax price and the total, updating instantly as you change any field.

That is it - there is nothing to install or sign up for, and no figures are stored. If a basket mixes taxable and exempt items, run them as separate calculations and add the results together.

Who this calculator is for

Anyone who needs to move between a pre-tax price and an after-tax total quickly. Common users include:

• Shoppers checking what an item will really cost at the register before they get to checkout.
• Small-business owners and freelancers who need to add the correct tax to an invoice or quote.
• Bookkeepers separating the tax portion out of a gross receipt total for their records.
• Travelers comparing what the same purchase costs in different cities or states.
• Anyone budgeting a large purchase - a car, appliance or furniture - where a few percent in tax is real money.

A second worked example: backing tax out of a receipt

Imagine a receipt shows a $53.50 total and you know the combined rate was 7%, but the pre-tax price is not printed. Using the reverse formula, the pre-tax price is $53.50 ÷ 1.07 = $50.00, and the tax was $53.50 − $50.00 = $3.50. Notice that simply taking 7% of $53.50 would give $3.745 - too high - because the tax was charged on $50.00, not on the full $53.50. This is the single most common error people make when separating tax out of a total, and it is exactly why the reverse mode divides rather than subtracts.

What changes the amount of tax you pay

If two purchases of the same item produce different tax, one of these factors is usually behind it:

• Location of the sale: the combined state, county, city and special-district rate is set by exactly where the transaction takes place.
• Type of item: groceries, prescription drugs and sometimes clothing may be exempt or taxed at a reduced rate, while prepared food, lodging and some services can carry extra taxes.
• Whether shipping is taxable: some states tax delivery charges and others do not, which changes the taxable base.
• The pre-tax price itself: coupons, manufacturer rebates and trade-ins can change the amount the rate is applied to.
• Tax holidays: some states waive sales tax on specific categories (such as back-to-school supplies) for a few days a year.

How sales tax rates stack up across the U.S.

There is no single "U.S. sales tax rate" because the figure is assembled in layers. A state sets a base rate, then counties, cities and special districts (for transit, stadiums, tourism or libraries) each add their own slice on top. The number you actually pay at the register is the sum of all the layers that apply at the store's exact address. That is why a calculator that asks for the combined rate is more honest than one that hardcodes a statewide figure: the statewide rate is almost never what you pay.

To give a sense of scale for the 2025 tax year: five states charge no statewide general sales tax at all (Alaska, Delaware, Montana, New Hampshire and Oregon), and the rest run a base state rate from roughly 4% up to around 7%. Once local taxes are added, the combined rate in many cities lands between about 6% and 10%, and a handful of localities push past 10%. Alaska is the notable special case - no statewide tax, but some boroughs and cities levy their own local sales tax, so a resident there may still pay tax on a purchase. The practical takeaway is simple: look up the combined rate for the specific city and county where the sale happens, type it in, and let the formula do the rest.

Rates also drift over time. A district tax can sunset or renew, a city can vote in a new transit levy, and states occasionally adjust the base. Because of this, no online calculator can keep a live national table perfectly current for every one of the thousands of U.S. tax jurisdictions - which is the reason this tool deliberately leaves the rate as an input you control rather than a number it guesses on your behalf.

Worked example: budgeting a big-ticket purchase

Sales tax feels trivial on a coffee but real on a major purchase, so it pays to run the math before you commit. Suppose you are buying a $28,000 car in a county with a combined 9% rate. The tax is $28,000 × 0.09 = $2,520, bringing the out-the-door figure on the price alone to $30,520 - more than enough to change which trim or model is in reach. Drive a few miles to a neighboring jurisdiction at 7% and the tax falls to $1,960, a $560 swing on the same vehicle. (Vehicle tax is often based on the registration address rather than the dealer's, so confirm which rate your state actually applies.)

The same logic scales to appliances, furniture and electronics: on a $1,500 sofa, the difference between a 6% and a 9.5% combined rate is the gap between $90 and $142.50 in tax. When you are deciding whether a purchase fits the budget, add the tax in first using the Add tax mode, then compare the true total against what you planned to spend - not the shelf price. If you are pricing a sale item, work out the discounted price first with the Discount Calculator, then bring that pre-tax figure here to add the tax on top.

Tips for getting an accurate result

• Use the rate for the point of sale, not your home. For most in-store purchases the rate is set by the store's location; for shipped goods, many states use the delivery (destination) address instead. When in doubt, use where the item is received.
• Type the combined rate, not just the state rate. The single most common cause of a wrong total is entering 6.25% when the real combined rate at checkout is 8.25%.
• Separate items with different treatment. If a basket mixes taxable goods with exempt groceries or prescriptions, run each group as its own calculation and add the totals.
• Match the mode to your starting number. Use Add tax when you have a pre-tax price, and Remove tax (reverse) when all you have is a receipt total - never subtract the percentage to undo tax.
• Round only at the end. Enter the full rate (for example 8.375%) rather than a rounded 8.4%; small rounding errors compound on large amounts.

Key terms explained

• Combined rate: the single percentage you enter, made up of the state rate plus any county, city and special-district rates that apply at the point of sale.
• Pre-tax price (taxable amount): the price the tax is calculated on, before tax is added.
• Total (gross): the pre-tax price plus the tax - what you actually hand over.
• Use tax: the counterpart to sales tax that you owe directly to your state on taxable items bought without sales tax being collected.
• Nexus: the connection (such as a physical location or enough sales) that requires a seller to collect a state's sales tax; it is why online retailers now charge tax in most states.
• Exemption: a category of goods or buyers (e.g., resale, nonprofits, certain groceries) on which no sales tax is charged.

How this compares to related calculators

This page answers "how much sales tax is on this price?" If your question is different, a sister tool fits better:

• To estimate the federal tax on your earnings, use the Income Tax Calculator.
• To see your take-home pay after all withholdings, use the Paycheck Calculator.
• To find the marginal rate on your last dollar of income, use the Tax Bracket Calculator.
• To learn the share of income you actually pay in tax, use the Effective Tax Rate Calculator.
• To estimate a refund or balance due, use the Tax Refund Calculator.
• For everyday shopping math, a quick Discount Calculator shows the sale price before tax, and the Tip Calculator works out gratuity once you know the pre-tax total.

Limitations and assumptions

This calculator is a quick estimating tool, not tax advice. Keep these points in mind:

• It applies one flat rate to the whole amount, so it does not handle mixed baskets of taxable and exempt items in a single run.
• It does not store or look up rates - you supply the combined rate, because rates vary by location and change over time.
• It does not model product-specific exemptions, reduced rates, or tax holidays.
• It does not calculate use tax owed on untaxed out-of-state purchases, though the formula is the same.
• For the exact rate and what is taxable in your area, confirm with your state or local tax authority.