12 min read
How Sales Tax Works in the US
Everything consumers, small business owners, and freelancers need to understand about American sales tax — from how rates are set to how to calculate what you owe.
- Complete Guide
Contents
Covers all 50 states · Sourced from Tax Foundation & State Revenue Depts.
Sales tax is one of the most misunderstood parts of the American financial system. Unlike income tax, it's invisible until the moment you pay — and unlike most countries' VAT systems, it varies wildly from one zip code to the next. This guide explains everything: what sales tax is, who sets the rates, who pays it, and how to calculate it correctly every time.
What Is Sales Tax?
Sales tax is a consumption tax levied by state and local governments on the sale of goods and, increasingly, services. When you buy a $50 shirt in Chicago, you pay more than $50 at the register — the extra amount is sales tax collected by the retailer on behalf of the government.
The key word is collected. Retailers don't keep sales tax — they act as intermediaries, gathering it from customers and remitting it to the appropriate tax authority. This means the legal obligation to remit the tax falls on the seller, not the buyer.
Sales Tax vs. VAT: What's the Difference?
Most countries use a Value Added Tax (VAT), where tax is applied at every stage of production and distribution. In the US, sales tax is only applied at the final point of sale to the end consumer. This makes the US system simpler for consumers to understand, but more complex for businesses to administer — since rates vary by jurisdiction, not by product stage.
Who Sets Sales Tax Rates?
The United States has no federal sales tax. Instead, the authority to levy sales tax rests entirely with state and local governments — which is why American sales tax is so complicated compared to the rest of the world.
There are three layers of sales tax in the US:
State Rate — Set by the state legislature. This is the baseline rate applied across the entire state. For example, California's state rate is 7.25%.
County Rate — Many counties add their own sales tax on top of the state rate. These are approved by county governments and often fund local services like schools and roads.
City/Municipal Rate — Cities and special taxing districts can also add their own rates. In extreme cases (like some parts of Louisiana), combined local rates can push the total above 10%.
The 5 States With No Sales Tax
Five US states have chosen not to implement a statewide sales tax:
Alaska
0%
Delaware
0%
Montana
0%
New Hampshire
0%
Oregon
0%
Highest & Lowest Combined Rates
When you factor in average local rates, the difference between the highest and lowest-taxing states is dramatic:
| State | State Rate | Avg Local | Combined | Tier |
|---|---|---|---|---|
| Louisiana | 5.00% | 5.13% | 10.13% | Highest |
| Tennessee | 7.00% | 2.61% | 9.61% | 2nd Highest |
| Washington | 6.50% | 3.07% | 9.57% | Very High |
| Arkansas | 6.50% | 2.98% | 9.48% | Very High |
| Alabama | 4.00% | 5.46% | 9.46% | Very High |
| — | — | — | — | — |
| Hawaii | 4.00% | 0.50% | 4.50% | Lowest (taxed) |
| Wyoming | 4.00% | 1.39% | 5.39% | Very Low |
| Maine | 5.50% | 0.00% | 5.50% | Very Low |
Rates are the Tax Foundation's averages as of July 1, 2026. See full rates for all 50 states in our Sales Tax Rates by State reference table →
Every figure in this guide, with its source, is in our US Sales Tax Statistics 2026 report →
How to Calculate Sales Tax
The math is straightforward once you know the correct combined rate for your location:
Formula
Tax Amount = Subtotal × (Combined Rate ÷ 100)
Total = Subtotal + Tax Amount
Example: $85 purchase in Texas (combined rate 8.20%) → Tax = 85 × 0.082 = $6.97 | Total = $91.97
Working Backwards: Tax-Inclusive Prices
Sometimes you know the final price and need to find the pre-tax subtotal. This is common when splitting expenses or verifying a receipt:
Reverse Formula
Subtotal = Total Price ÷ (1 + Rate ÷ 100)
Example: $54.25 total receipt in Florida (6.98% combined) → Subtotal = 54.25 ÷ 1.0698 = $50.71
Skip the math — use our free calculator
Enter any subtotal, pick your state, get the exact tax and total instantly.
Sales Tax Nexus: When Businesses Must Collect
Not every business is required to collect sales tax in every state. The concept of nexus determines when a business has enough of a connection to a state to be legally obligated to collect and remit that state's sales tax.
Physical Nexus
If your business has a physical presence in a state — an office, warehouse, employees, or even a temporary pop-up shop — you have physical nexus there and must collect sales tax from customers in that state.
Economic Nexus (Post-2018)
The landmark 2018 Supreme Court ruling in South Dakota v. Wayfair changed everything. States can now require out-of-state sellers to collect sales tax if they exceed a certain threshold of sales into that state. The South Dakota law at issue in the case covered sellers with more than $100,000 in sales or 200 or more transactions a year into the state; thresholds vary by state, and California and Texas both use $500,000. This primarily affects e-commerce businesses that sell nationally.
What's Exempt From Sales Tax?
Not everything is taxable. Most states carve out exemptions for certain categories — though the rules vary enormously by state:
| Category | Status | Notable Exceptions |
|---|---|---|
| Groceries (unprepared food) | Exempt or reduced in many states | TN taxes food at a reduced 4% state rate; AL at 2% |
| Prescription drugs | Exempt in many states | IL taxes at 1% |
| Clothing | Varies widely | NY exempts items under $110 from its 4% state tax; PA exempts most clothing |
| Digital goods / software | Varies by state | PA taxes digital products |
| Services | Varies by state | PA taxes certain services and specific business services |
| Manufacturing equipment | Exempt in many states | Used for B2B production purposes |
| Agricultural supplies | Exempt in many states | Varies by item type |
| Resale goods | Exempt (with certificate) | Buyer must provide resale certificate |
Origin vs. Destination Sourcing
For in-person sales, the tax rate is simple: wherever the store is located. For online and remote sales, it gets more complex — states use one of two systems to determine which rate applies.
Destination-Based Sourcing
The tax rate of the buyer's address applies. If you're an Arizona seller shipping to a customer in New York, you collect New York's tax rate.
Origin-Based Sourcing
The tax rate of the seller's location applies. Some states use origin-based sourcing for sales made within the state; your state's revenue department can tell you which rule applies. This simplifies compliance for sellers but can confuse buyers.
Sales Tax for Small Businesses: A Practical Checklist
If you run a small business and sell physical products, here's what you need to do to stay compliant:
Determine your nexus. Figure out which states you have physical or economic nexus in. If you only sell locally, this may just be your home state.
Register for a sales tax permit. Every state where you have nexus requires you to register before collecting tax. Operating without a permit is illegal even if you collect the tax.
Find the correct combined rate. Use our state rate reference table for the state rate, then check your state's revenue department for local rates by zip code.
Collect tax at the point of sale. Add the tax to your invoices and receipts. Our free calculator can compute the exact amount instantly.
File and remit regularly. States require you to file returns and pay collected tax on a schedule (monthly, quarterly, or annually depending on your volume). Missing deadlines results in penalties.
Tips for Consumers
As a shopper, sales tax affects your budget every day. Here's how to think about it:
Always Calculate the True Cost
When budgeting for a purchase, remember to add the combined sales tax rate. A $500 laptop in Tennessee will actually cost you around $548 at the register. Use our calculator to find the true price before you commit.
Online Shopping and Use Tax
Even when online retailers don't charge sales tax at checkout, you may legally owe use tax — the consumer-side equivalent. Most states technically require residents to self-report and pay use tax on untaxed online purchases, though enforcement for individual consumers is rare.
Cross-Border Shopping
If you live near a state border, it may be worth comparing prices inclusive of tax. Shopping in a no-tax or low-tax state can generate meaningful savings on large purchases like electronics, furniture, or appliances.
A Brief History of US Sales Tax
Sales tax is relatively modern by American standards. Mississippi became the first state to adopt a sales tax in 1930, and the trend continued through the Great Depression as states looked for revenue. The last state to adopt one was Vermont, in 1969, leaving five states without a statewide sales tax.
The internet era fundamentally disrupted the system. For decades, online retailers like Amazon could legally avoid collecting sales tax in states where they had no physical presence — under a rule established by the 1992 Supreme Court case Quill Corp. v. North Dakota. This gave e-commerce a significant pricing advantage over brick-and-mortar stores.
That changed in 2018. The Supreme Court's decision in South Dakota v. Wayfair overturned Quill and allowed states to require economic nexus — meaning online sellers crossing revenue thresholds now had to collect tax just like physical stores. By December 2019, 43 of the 45 states with a statewide sales tax had adopted collection obligations for remote sellers, according to the Tax Foundation.
Ready to calculate your sales tax?
Our free tool covers all 50 states. Enter any amount and get the exact tax in seconds.
Create any receipt with auto-calculated state tax using our free receipt generator, or see which receipt generators handle multiple tax rates in our comparison of ten tools.
Frequently Asked Questions
What is the average sales tax rate in the US?
The population-weighted average combined state and local sales tax rate in the US is 7.53% as of July 1, 2026, according to the Tax Foundation. Five states (Alaska, Delaware, Montana, New Hampshire, and Oregon) have no statewide sales tax, while Louisiana has the highest average combined state and local rate, at 10.13%.
Which state has the highest sales tax?
Louisiana has the highest average combined state and local sales tax rate at 10.13% as of July 1, 2026. Tennessee ranks second at 9.61%, followed by Washington (9.57%), Arkansas (9.48%), and Alabama (9.46%). California has the highest state-level rate at 7.25%, but its combined rate (9.03%) is lower than Louisiana's because its average local rate is smaller (1.78%, against Louisiana's 5.13%).
Which states have no sales tax?
Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. However, Alaska allows local governments to impose their own sales taxes, so some Alaskan cities and boroughs do charge sales tax — with local rates reaching as high as 7.85%.
Do I have to pay sales tax on online purchases?
In most cases, yes. Since the 2018 Supreme Court ruling in South Dakota v. Wayfair, states can require online retailers to collect sales tax if they exceed economic nexus thresholds, which vary by state. The South Dakota law at issue in Wayfair covered sellers with more than $100,000 in sales or 200 or more transactions a year into the state; California and Texas both use $500,000. If an online purchase doesn't include sales tax, you may technically owe use tax to your state.
Are groceries taxed in every state?
No. Many states exempt unprepared groceries from sales tax, and some tax them at a reduced rate: Tennessee's state rate on food is 4% and Alabama's is 2%. Arkansas and Illinois repealed their state sales taxes on groceries on January 1, 2026, though local grocery taxes can still apply. The definition of groceries versus prepared food varies by state — items like candy, soda, and heated foods are often taxed even in states that exempt groceries.
How do I find the exact sales tax rate for my location?
Because sales tax rates vary by state, county, and city, you need to look up the combined rate for your specific address. Your state's department of revenue website typically has a rate lookup tool. You can also use our free sales tax calculator or check our sales tax rates by state reference table for state-level rates.
What is sales tax nexus?
Nexus is the legal connection between a business and a state that creates an obligation to collect and remit sales tax. Physical nexus exists when a business has a physical presence (office, warehouse, or employees) in a state. Economic nexus, established by the 2018 Wayfair decision, means states can also require collection from out-of-state sellers who exceed certain revenue or transaction thresholds.
Is sales tax included in the price in the US?
No. Unlike most countries that use VAT (value-added tax), US prices displayed on shelves and online do not include sales tax. The tax is added at checkout, which means the amount you pay at the register is higher than the listed price. This is one of the most common surprises for visitors to the US from countries where tax-inclusive pricing is standard.
How is sales tax different from VAT?
Sales tax is a single-stage tax applied only at the final point of sale to the consumer. VAT (value-added tax) is a multi-stage tax applied at every step of production and distribution, with businesses claiming credits for VAT paid on inputs. The US is one of the few developed countries that uses a sales tax system instead of VAT. Sales tax rates also vary by jurisdiction in the US, while VAT is typically a single national rate.
Can I get a sales tax refund as a tourist in the US?
Unlike many countries that offer VAT refunds to international visitors, the US generally does not provide sales tax refunds to tourists. Louisiana ran a Tax Free Shopping program that refunded sales tax to international visitors from 1988, but it ended on July 1, 2024.
Methodology and sources
Tax Foundation (State and Local Sales Tax Rates, Midyear 2026, July 6, 2026; Sales Tax Holidays by State, 2026), California Department of Tax and Fee Administration, Texas Comptroller of Public Accounts, Illinois Department of Revenue, Tennessee Department of Revenue, Alabama Department of Revenue, New York State Department of Taxation and Finance, Pennsylvania Department of Revenue, Louisiana Department of Revenue, Tax Foundation (When Did Your State Adopt Its Sales Tax?; State Online Sales Taxes in the Post-Wayfair Era, December 2019), South Dakota v. Wayfair (2018), Quill Corp. v. North Dakota (1992), Institute on Taxation and Economic Policy. Rates as of July 1, 2026. Each figure's source is linked in our US Sales Tax Statistics 2026 report. This guide is for informational purposes only and does not constitute legal or tax advice.
About the author
Head of Growth
Ciara is Head of Growth at CheckoutReceipt, where she leads marketing, growth and content, including the site's receipt maker comparisons and buyer's guides.
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