Sales Tax Calculator Online

How to Calculate US Sales Tax Online

1. Pick Add Tax or Remove Tax: Use the Direction toggle. "Add tax" gross-ups a pre-tax sticker price to the total a customer actually pays. "Remove tax" reverse-calculates the pre-tax amount from a known total — useful for expense reports, receipts that only show the gross, and audit reconciliation.
2. Enter the Amount: Type the dollar figure into Pre-tax price ($) (in Add mode) or Total price (with tax) ($) (in Remove mode). Decimals are allowed; the math updates as you type.
3. Set the Sales Tax Rate: Type a percentage into Sales tax rate (%) or pick a US state from the Or pick a US state dropdown to auto-fill the state base rate. Remember state base is the floor — local city/county/special-district add-ons can push the effective combined rate to 9–10% in Louisiana, Tennessee, Washington, Arkansas, and Alabama (the five highest combined-rate states in 2026).
4. Read Pre-tax, Tax, and Post-tax: The result panel shows all three numbers at once so you can paste any of them into an invoice, expense claim, or accounting line. Click the copy icon to copy the headline figure. Nothing is uploaded — the entire calculation runs in your browser.

Why Use a Sales Tax Calculator?

US sales tax is one of the messiest taxes in the developed world. There is no federal sales tax — every state, county, city, and sometimes transit or stadium district sets its own rate, and they all stack. A purchase rung up in Seattle pays Washington state tax, King County tax, the City of Seattle tax, and a regional transit authority tax simultaneously. The label on the shelf rarely includes any of it. A calculator is the only practical way to answer "what will this actually cost?" or "what was the pre-tax price on this receipt?"

• Expense reports and reimbursement — Many corporate expense systems require the pre-tax amount separately (for VAT/GST recovery on international travel, or for IRS Schedule A itemized state-tax deduction in years where you choose sales tax over income tax). Remove mode pulls the net out of a receipt that only shows the gross.
• Quoting and invoicing — Quote a customer the all-in price by adding tax to your net rate. Sales tax on services varies enormously by state (taxable in Hawaii and South Dakota; mostly exempt in California and New York), so know your nexus rules before adding tax to a service invoice.
• Online sellers and Wayfair compliance — Since South Dakota v. Wayfair (June 21, 2018), states can require out-of-state sellers to collect sales tax once they cross an economic nexus threshold — typically $100,000 in sales or 200 transactions into the state per year. Use the calculator to model effective rates by destination state before pricing into a new market.
• Tax holidays — Most southern and Atlantic states run back-to-school sales tax holidays in late July or early August, exempting clothing under $100, school supplies under $50, and computers under $750–$1,500. The calculator lets you toggle the rate to 0% to see the saving on a hypothetical cart.
• Use tax catch-up — If you bought something out of state (or on Amazon before Wayfair) and the seller didn't collect tax, you may owe use tax at your home state's rate. Most state income-tax returns include a use-tax line. Run the totals through the calculator at your state rate.
• Comparison shopping across borders — A laptop priced the same in Portland, Oregon (0% sales tax) and Seattle, Washington (combined ~10.25%) differs by ~$100 on a $1,000 device. The calculator surfaces the real out-the-door price.

US State Sales Tax — Base Rates 2026

Base state rate only. Local jurisdictions add on top. Source: Tax Foundation, 2026 State Sales Tax Rates (published January 2026, updated April 2026).

State	Base rate	Notes
California	7.25%	Highest base in the US; LA/SF push combined to ~9.5–10.25% with local
Indiana	7.00%	Tied for second highest base; no local add-on, so combined ≈ base
Mississippi	7.00%	One of the few states still taxing groceries at full rate
Rhode Island	7.00%	No local add-on, statewide flat
Tennessee	7.00%	Combined often 9.5%+ — second-highest combined rate in US
Minnesota	6.875%	Clothing is exempt
Nevada	6.85%	Heavily reliant on sales tax (no state income tax)
Texas	6.25%	Cities/counties add up to 2% — combined cap is 8.25%
Illinois	6.25%	Combined Chicago rate ~10.25%
Massachusetts	6.25%	Clothing under $175 exempt
Florida	6.00%	No state income tax; county surtaxes add 0.5–1.5%
New York	4.00%	Lowest base of any taxing state; NYC combined is 8.875%
Louisiana	4.45%	Lowest base in deep south, but local add-ons make combined the highest in US at ~10.11%
Alabama	4.00%	Combined often ~9.5% — local rates do most of the work
Alaska	0.00%	No state-level tax, but boroughs can levy (up to ~7%)
Delaware	0.00%	No state or local sales tax — "tax-free shopping" pitch
Montana	0.00%	No state or local sales tax (resort towns may charge a local "resort tax")
New Hampshire	0.00%	No general sales tax; meals/lodging taxed at 8.5%
Oregon	0.00%	No state or local sales tax

Sales Tax vs VAT vs GST

The US is the only major economy that runs a multi-rate, multi-jurisdiction sales tax instead of a single national VAT or GST. Knowing which one applies determines whether you can reclaim the tax as a business expense, who actually pays it, and at what stage of the supply chain.

Property	US Sales Tax	VAT (Value Added Tax)	GST (Goods and Services Tax)
Where used	United States (state/local)	EU, UK, most of Africa, Mexico, Latin America	Canada, Australia, New Zealand, India, Singapore
Applied at	Final retail sale only	Every stage of production; businesses reclaim input VAT	Every stage; same input-credit mechanism as VAT
Typical rate	0–7.25% state + 0–5% local	17–27% (EU range; standard 15% minimum)	5% (Canada federal) to 18% (India standard)
Who remits	Seller, to each state with nexus	Seller, with input credit netted out	Seller, with input credit netted out
Visible on receipt	Yes — added at checkout	Usually included in displayed price (B2C)	Varies; itemized in Canada, included in AU/NZ
B2B treatment	Resale exemption certificate; no tax on inputs	Net-zero through reclaim chain	Net-zero through reclaim chain
Cross-border	Wayfair economic nexus since 2018	Place-of-supply rules; OSS/IOSS for EU e-commerce	Reverse charge for B2B imports

Frequently Asked Questions

Why is the rate at my register higher than the state's base rate?

Because the state base is just the floor. Counties, cities, transit authorities, school districts, and special districts (stadiums, tourism zones, public-safety levies) each add their own piece on top. In Chicago you pay 6.25% Illinois + 1.75% Cook County + 1.25% City of Chicago + 1% Regional Transportation Authority = 10.25% combined. In Los Angeles you pay 7.25% California + 0.25% LA County + up to 2% local district = 9.5–10.25% depending on the exact address. The combined rate can even vary by ZIP code within a single city, which is why services like Avalara and TaxCloud geocode by address rather than ZIP alone.

What's exempt from sales tax in most states?

The big categories: grocery food (40 of 50 states apply no state tax to unprepared groceries as of 2026; Arkansas and Illinois reportedly removed theirs effective January 1, 2026, joining Kansas in 2025 — verify current exemptions at your state's revenue department); prescription drugs (exempt in nearly every state); most services (a US peculiarity — labor, professional services, legal/medical, software-as-a-service are exempt in most states, though Hawaii, South Dakota, New Mexico, and West Virginia tax services broadly); manufacturing inputs and resale items (with a resale exemption certificate); and clothing (Massachusetts under $175, Pennsylvania, New Jersey, Minnesota, Vermont). Prepared food — anything heated by the seller, assembled from multiple ingredients, or sold with utensils — is taxable even in states that exempt groceries, per the Streamlined Sales Tax Agreement's three-test rule.

Do I have to collect sales tax on online sales? What was the Wayfair case?

If you sell into a state and cross its economic nexus threshold, yes. South Dakota v. Wayfair, Inc. (decided June 21, 2018) overturned the 1992 Quill "physical presence" rule and replaced it with economic nexus: a state can require you to collect its sales tax if you exceed the threshold dollars or transactions per year, even without an office or warehouse there. South Dakota's threshold (the one the Supreme Court approved) is $100,000 in sales OR 200 separate transactions into the state per year. Other states have similar but not identical thresholds — California is $500,000 with no transaction count; New York is $500,000 AND 100 transactions (both required). Marketplace facilitator laws (Amazon, eBay, Etsy) shift the collection burden to the platform for most sellers, but if you sell direct (Shopify, your own site), you're responsible for monitoring nexus in every state.

How do back-to-school sales tax holidays work?

About 17 states run an annual sales tax holiday — typically a Friday-through-Sunday window in late July or early August — exempting specific categories from state (and sometimes local) sales tax. The most common rules: clothing items under $100 each, school supplies under $50 each, and computers/tablets under $750 to $1,500. Florida, Texas, Tennessee, South Carolina, Arkansas, Missouri, Iowa, Oklahoma, Maryland, Massachusetts, and several others all run versions. Local jurisdictions can opt in or out, which is why a Houston purchase might be tax-free while the same item in a non-participating Texas county is not. Toggle the rate to 0% in the calculator to model the saving.

What is "use tax" and do I really owe it?

Use tax is the sister tax to sales tax. If you bought a taxable item from an out-of-state seller who didn't charge your home state's sales tax (common pre-Wayfair, still possible for small sellers under the threshold), you legally owe use tax at your home state's rate. Almost every state with sales tax also has a use-tax line on the individual income tax return — California's Form 540, New York's IT-201, etc. Enforcement on individuals is light; enforcement on businesses (especially after large equipment or vehicle purchases) is significant. After Wayfair, most consumer purchases now include sales tax at checkout, so the residual use-tax burden on individuals has shrunk — but a private-party vehicle or boat purchase out of state still typically triggers a use-tax filing when you register at home.

How do I reverse-calculate the pre-tax price from a receipt that only shows the total?

Switch the calculator to Remove tax mode, enter the total in Total price (with tax) ($), and set the rate. The math is pre-tax = total ÷ (1 + rate/100). A common error is multiplying the total by the rate to "back out" the tax — that overstates the tax by a small amount because the rate was applied to the smaller pre-tax base, not the larger total. On a $108 receipt with 8% tax, divide by 1.08 to get $100.00 pre-tax and $8.00 tax — not $108 × 8% = $8.64.

Does the calculator know my local combined rate, or just the state base?

Just the state base. The dropdown auto-fills the statewide rate published by the Tax Foundation. To get your true combined rate (state + county + city + special districts), look up your address on your state's Department of Revenue rate-lookup tool (every state has one) or use an address-based commercial lookup like Avalara, TaxJar, or TaxCloud, then type that combined rate into Sales tax rate (%). We deliberately don't ship a 13,000-jurisdiction rate table because they change quarterly and going stale would cost you more than the convenience saves.

Can I deduct sales tax on my federal income tax return?

Yes, if you itemize on Schedule A you can deduct either state and local income tax or state and local sales tax — not both, capped at $10,000 combined SALT through tax year 2025 (the cap is scheduled to sunset; check the IRS for current-year rules). Most filers in income-tax states (California, New York, etc.) come out ahead deducting income tax. Filers in no-income-tax states (Florida, Texas, Tennessee, Washington, Nevada, South Dakota, Wyoming, Alaska, New Hampshire) almost always deduct sales tax. The IRS publishes a Sales Tax Deduction Calculator that estimates your year's sales tax from your AGI and ZIP code if you didn't save receipts.