US Sales Tax by State: Quick Guide

How us sales tax by state works in practice

Sales tax is a consumption tax levied at point of sale. Forty-five states plus DC impose statewide sales tax; local jurisdictions often add more. Use tax, excise tax, and special district taxes may apply on top. Online sales generally follow buyer's destination rules.

The goal is not to memorize every term — it is to know which inputs matter and what outcome you are aiming for.

So what: When you can explain this in your own words, you are far less likely to accept a bad quote, fee, or assumption.

A real scenario worth running

$800 laptop purchase in Chicago, IL vs Portland, OR. Step by step: Illinois state rate: 6.25%; Chicago combined ≈ 10.25% → Chicago tax: $800 × 10.25% = $82 → total $882 → Oregon: no statewide sales tax → total $800 → Difference: $82 — destination matters for large purchases. Bottom line: For big-ticket items, buying in a no-tax state (if legal) or online with correct nexus rules can save significantly.

So what: Plug your own numbers into the same logic before you decide.

US sales tax overview

Sales tax is a consumption tax collected at the point of sale. Unlike VAT, it is not embedded in displayed prices in most states — tax is added at checkout. Rates vary from 0% to over 10% when state and local rates combine.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

States with no statewide sales tax

Forty-five states plus DC impose a statewide sales tax.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Highest combined rates (state + local, approximate)

Rates change — verify current figures for your jurisdiction.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

How to calculate sales tax

Sales tax = Purchase price × Combined tax rate
Total cost = Purchase price + Sales tax

Example: $800 laptop in Chicago (10.25% combined rate):

• Tax: $800 × 0.1025 = $82
• Total: $882

Same purchase in Portland, Oregon: $800 (no sales tax).

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Online sales tax rules

Since South Dakota v. Wayfair (2018), states can require remote sellers with economic nexus to collect sales tax. Marketplace facilitators (Amazon, Etsy, Walmart) typically collect on behalf of third-party sellers.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Sales tax vs use tax

Use tax applies when you buy taxable goods out-of-state without paying sales tax and use them in your home state. You owe use tax on your state income return — commonly overlooked for large out-of-state purchases.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Business sales tax obligations

Businesses must register, collect, file, and remit in every state where they have nexus.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Tips for consumers

1. Big-ticket purchases — tax differences of 8–10% matter on cars, furniture, electronics
2. Move states — update your address; tax follows destination
3. Business expenses — sales tax on business purchases may be deductible or recoverable
4. Keep receipts — needed for business expense documentation

Use our sales tax calculator to compute tax for any state and purchase amount.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Common mistakes

1. Five states have no statewide sales tax — this quietly costs you over time.
2. Combined rates include state + county + city — this quietly costs you over time.
3. Groceries and medicine are often exempt or reduced — this quietly costs you over time.
4. Businesses must collect tax in states where they have nexus — this quietly costs you over time.

What to do next

Use our Sales Tax Calculator to model your situation — change one input at a time to see what moves the result most.