Sales Tax Calculator
Calculate sales tax amounts and total prices instantly. Supports multiple tax rates, reverse tax calculations, and includes presets for all US state sales tax rates. Perfect for shoppers, business owners, and accountants.
What Is a Sales Tax Calculator?
A sales tax calculator is a free online tool that calculates the sales tax amount and total price for any purchase. It supports standard tax calculations, reverse tax calculations (finding the pre-tax amount from a total), and multiple tax rates for state, county, and city taxes.
Sales tax is a consumption tax imposed by governments on the sale of goods and services. Rates vary by jurisdiction, state, county, and city and can range from 0% to over 10%. Understanding sales tax is essential for budgeting, business accounting, and consumer awareness.
How Does the Sales Tax Calculator Work?
The calculator supports three main modes:
Standard Mode: Calculate tax amount and total price from the pre-tax amount and tax rate.
Reverse Mode: Find the pre-tax amount and tax amount from the total price and tax rate.
Multiple Rates Mode: Calculate total tax from state, county, and city tax rates combined.
Standard Formula: Tax Amount = Amount × (Rate ÷ 100) | Total = Amount + Tax Amount
Reverse Formula: Pre-Tax Amount = Total ÷ (1 + Rate ÷ 100) | Tax Amount = Total − Pre-Tax Amount
Multiple Rates: Combined Rate = Rate₁ + Rate₂ + Rate₃ | Total Tax = Amount × (Combined Rate ÷ 100)
Why Use This Sales Tax Calculator?
- Three Modes: Standard, Reverse, and Multiple Rates — all in one tool.
- State Presets: Quick-select tax rates for all US states.
- Step-by-Step: See the formula and calculation breakdown for every result.
- Visual: Charts showing the breakdown of your total price.
- Free & Easy: No registration, no fees, just enter your numbers and get results.
- Mobile-Friendly: Works on any device, from desktop to smartphone.
Sales Tax by State (2026)
- Highest Rates: California (7.25% state + local), New York (4% + local), Illinois (6.25% + local)
- No State Sales Tax: Alaska, Delaware, Montana, New Hampshire, Oregon
- Average State Rate: ~5-7% with local rates adding 1-4%
- Local Variations: Many states have county and city taxes that can add significantly to the total rate
❓ Sales Tax FAQ
What is sales tax?
Sales tax is a consumption tax imposed by state and local governments on the sale of goods and services. It is typically calculated as a percentage of the purchase price and collected by the seller at the point of sale.
How do I calculate sales tax?
Sales Tax Amount = Price × (Tax Rate ÷ 100). For example, $100 at 8% tax = $100 × 0.08 = $8. Use the Standard mode of this calculator for instant results.
How do I calculate the total price including tax?
Total Price = Price + (Price × Tax Rate ÷ 100). Or simply: Total = Price × (1 + Tax Rate ÷ 100). For $100 at 8%: $100 × 1.08 = $108.
How do I find the pre-tax amount from a total including tax?
Pre-Tax Amount = Total ÷ (1 + Tax Rate ÷ 100). If you paid $108 at 8% tax: $108 ÷ 1.08 = $100. Use the Reverse mode for this calculation.
What is the difference between state and local sales tax?
State sales tax is imposed by the state government and is typically uniform across the state. Local sales tax is imposed by counties, cities, or special districts and varies by location. The total sales tax rate is the sum of state and local rates.
Which states have no sales tax?
Five states have no state-level sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. However, some of these states allow local jurisdictions to impose their own sales taxes.
What is the average sales tax rate in the US?
The average combined state and local sales tax rate in the US is about 7.12% as of 2026. State rates average around 5-6%, with local add-ons varying significantly by location.
What is the difference between sales tax and use tax?
Sales tax is collected at the point of sale by the retailer. Use tax is paid directly to the state by the consumer when sales tax was not collected (e.g., online purchases from out-of-state sellers). Use tax rates are typically the same as sales tax rates.
Are services subject to sales tax?
It depends on the state and the type of service. Most states tax tangible personal property but exempt many services. However, some states tax services like repairs, maintenance, and professional services. Check your state's tax laws for specific rules.
What items are exempt from sales tax?
Common exemptions include groceries (in many states), prescription drugs, medical devices, educational materials, and certain agricultural supplies. Exemptions vary by state, check your state's tax authority for a complete list.
How do I calculate sales tax for online purchases?
For online purchases, sales tax is typically calculated based on the destination state's tax rate (destination-based sourcing). Some states use origin-based sourcing (seller's location). Use the calculator with the applicable rate for your location.
What is a tax-exempt purchase?
A tax-exempt purchase is one where the buyer is not required to pay sales tax, typically because they are a non-profit organization, a government entity, or purchasing items for resale. The buyer must provide a valid exemption certificate to the seller.
How do I calculate sales tax for a business?
Businesses collect sales tax from customers and remit it to the state. The tax rate depends on the location of the sale (destination-based) or the business location (origin-based). Businesses need to register with their state's tax authority and file regular sales tax returns.
What is a sales tax nexus?
Nexus is a connection between a business and a state that requires the business to collect and remit sales tax. Nexus can be established by having a physical presence (office, warehouse, employees) or by meeting economic thresholds (e.g., $100,000 in sales or 200 transactions in the state).
How often do sales tax rates change?
Sales tax rates can change multiple times per year, especially at the local level. State rates change less frequently but can be adjusted by legislation. Always verify the current rate for your location using official sources.
What is the difference between sales tax and VAT?
Sales tax is a consumption tax collected at the final point of sale to the end consumer. VAT (Value-Added Tax) is collected at each stage of production and distribution, with businesses paying tax on their purchases and collecting tax on their sales, remitting the difference to the government.
How do I calculate sales tax for a car purchase?
Car sales tax is calculated on the purchase price (or the sales price minus trade-in value in some states). The rate is typically the same as the general sales tax rate, but some states have special rates for vehicles. Check your state's DMV for specific rules.
What is the difference between sales tax and excise tax?
Sales tax is a percentage-based tax on the sale price. Excise tax is a specific tax on particular goods (like gasoline, alcohol, tobacco) that can be a fixed amount per unit or a percentage. Excise taxes are often included in the price rather than added at checkout.
How accurate is this sales tax calculator?
This calculator uses standard tax formulas and provides accurate results based on the rates you enter. However, sales tax rates vary by location and can change frequently. Always verify the correct rate for your specific jurisdiction using official sources.
Can I use this calculator for tax planning?
Yes, this calculator is excellent for estimating sales tax for budgeting, shopping, and business planning. For official tax filing, always consult with a tax professional and use the rates provided by your state's tax authority.