Sales Tax Calculator
Calculate sales tax and total price, or work backward from the total to find the pre-tax price.
The back-calculation is the one that surprises people. If a receipt shows a total of $54.24 and you know tax was 8.5%, the pre-tax amount is $54.24 ÷ 1.085 = $50.00, not $54.24 − (8.5% of $54.24). That mistake overestimates the tax. The division approach is correct.
To find pre-tax price from a total: divide the total by (1 + tax rate). Don't subtract the percentage of the total, that gives the wrong answer because the tax was calculated on the pre-tax amount, not the total.
How sales tax works
Sales tax is calculated on the pre-tax selling price and added to get the total. A $50 item with 8% sales tax: $50 × 0.08 = $4.00 tax, total = $54.00. The tax rate is expressed as a percentage of the price, not the total.
State vs local tax rates
The reference rates shown are state base rates. Most localities add county and city taxes on top of the state rate. Combined rates in high-tax areas can significantly exceed the state base: Tennessee has a 7% state rate but combined state/local rates in some cities reach 9.75%. Chicago's combined rate has exceeded 10.25%. Always use the actual combined rate for your specific location, not just the state rate.
States with no sales tax
Five states have no statewide sales tax: Oregon, Montana, Delaware, New Hampshire, and Alaska (though Alaska allows local municipalities to levy sales taxes). If you're comparing prices between states, no-tax states can produce meaningful savings on large purchases, a reason why many people buy cars and high-end electronics in Oregon or Delaware.
Sales tax on services
Most states tax the sale of goods but not services, though this varies significantly. Some states tax certain services (digital downloads, SaaS software, admission fees, repair services) while others don't. If you're pricing services for clients in multiple states, check each state's rules, the variation is substantial and penalties for collecting the wrong amount can be significant for businesses.
Frequently asked questions
Is sales tax the same as VAT?
No. US sales tax is charged only at the final point of sale to the end consumer. VAT (Value Added Tax), used in Europe and most of the world, is charged at every stage of the supply chain, manufacturer to wholesaler, wholesaler to retailer, retailer to consumer, with each stage claiming back the VAT paid at the previous stage. The end result is similar for consumers, but the mechanics and who remits the tax are very different.
Should sales tax be included in a price tag?
In the US, price tags typically show pre-tax prices and tax is added at the register. This is different from most of the world, where the displayed price is the all-in price. The US practice means the actual checkout total is higher than the shelf price, a source of confusion for international visitors.
How do I calculate tax on multiple items?
Add the pre-tax prices of all items first, then apply the tax rate to the total. Most jurisdictions apply sales tax to the total transaction, though some items (groceries, prescription drugs) may be exempt in certain states. Apply the tax to taxable items only.