Sales Tax Calculator

• •Use the Sales Tax Calculator when comparing financial options side-by-side — such as different loan terms or investment returns — to make more informed decisions.
• •Use it to quickly estimate costs or returns before making purchasing, investment, or borrowing decisions.
• •Use it for financial education and planning to understand how compound interest, fees, or tax affects the real value of money over time.
• •Use it when building or reviewing a budget to verify that projections and calculations are mathematically correct.

The Sales Tax Calculator is a free financial calculation tool designed to help individuals and businesses understand key financial concepts and estimate costs, returns, and loan parameters. Calculate sales tax and total price The calculations are based on standard financial mathematics formulas. Results are for informational and educational purposes only and should not be considered financial, investment, or tax advice. Consult a qualified financial professional before making financial decisions. All calculations are performed in your browser — no personal financial data is stored or transmitted.

Sales tax is a consumption tax levied by state and local governments on retail purchases, expressed as a percentage of the pre-tax sale price. The tax amount is computed as tax = price × rate, and the total paid by the customer is total = price + tax = price × (1 + rate). US sales tax rates vary dramatically by jurisdiction: five states (Alaska, Delaware, Montana, New Hampshire, Oregon) have no state sales tax at all; most states charge 4–8% at the state level; and many localities add additional city, county, or special-district taxes that can push combined rates above 10% in places like Chicago, Long Beach, and parts of Louisiana. The 'tax-inclusive price' problem — backing out the pre-tax price from a stated total — is a reverse calculation: if the total is T and the rate is r, then pre-tax price = T / (1 + r). For a $107 total including 7% tax, pre-tax = $107 / 1.07 = $100. This reverse calculation is useful for expense reports, accounting, and verifying vendor invoices where the total is stated but the tax amount is not explicitly listed. Online shopping complicates sales tax because of the 2018 Supreme Court decision in South Dakota v. Wayfair, which allowed states to collect sales tax from out-of-state sellers. Post-Wayfair, most major online retailers collect the buyer's local sales tax automatically, but marketplace facilitator laws and nexus rules mean smaller sellers may or may not collect, depending on their sales volume into your state. Some goods are exempt from sales tax in certain states — groceries are exempt in many states, clothing up to a certain value is exempt in Pennsylvania, prescription medicine is almost universally exempt, and 'tax holidays' on back-to-school items or energy-efficient appliances temporarily remove sales tax from qualifying purchases.

• •Retail purchase planning: when budgeting for a large purchase, add sales tax to the sticker price to see the true out-the-door cost. A $2,000 laptop in California (about 9.5% combined rate) actually costs $2,190 at checkout — a meaningful difference when comparing prices across states or online retailers.
• •Business expense reports and accounting: reverse-calculate the pre-tax amount from a receipt's total to separate the cost of goods from the tax portion. This is essential for business accounting, where deductible expenses are the pre-tax amount and tax is a separate line item.
• •Cross-state comparison: when shopping for a major item (furniture, electronics, appliances), compare the total cost including sales tax across your state, a neighboring state, and online retailers. The differences can be hundreds of dollars on a large purchase and may justify a road trip or different vendor choice.
• •Vehicle purchase: sales tax on cars is typically computed on the net purchase price after trade-in and incentives (in most states). This calculator helps you verify the dealer's tax calculation and understand what portion of your down payment covers taxes.
• •Tax-inclusive pricing: in countries that use value-added tax (VAT) inclusive pricing — most of Europe, much of Asia — the displayed price already includes tax. Use the reverse calculation to back out the VAT for expense reporting or to compare with US pre-tax prices.