Sales Tax Calculator

Add or remove sales tax from any price. Enter the amount and tax rate to find the tax owed and the final total, or work backward to the pre-tax price.

How Sales Tax Works

Sales tax is a consumption tax imposed by state and local governments on the purchase of goods and certain services. Rates vary significantly by location, ranging from 0 percent in states without sales tax to over 10 percent in some combined state and local jurisdictions. The tax is calculated as a percentage of the purchase price and added at the point of sale. Understanding applicable rates helps you budget accurately for purchases and compare prices across jurisdictions.

State and Local Rate Variations

Five states impose no sales tax while the remaining states have rates ranging from 2.9 to 7.25 percent at the state level. Local municipalities, counties, and special districts may add additional taxes, creating combined rates that vary even within a single state. Some states exempt certain categories like groceries, clothing, or prescription medications. Our calculator accounts for combined state and local rates to give you the accurate total tax on your purchases.

Sales Tax Planning Tips

For large purchases, timing and location can save significant money. Tax-free holidays offered by many states provide temporary exemptions on specific categories. Purchasing in lower-tax jurisdictions for major items like vehicles or electronics can yield meaningful savings. Online purchases are subject to sales tax based on the delivery address in most states. Understanding these rules helps you make informed purchasing decisions and budget accurately for the true cost of goods.

Online Shopping and Sales Tax

Following the 2018 South Dakota v. Wayfair Supreme Court decision, most states now require online retailers to collect sales tax regardless of physical presence. This means online purchases are generally subject to the same combined state and local rates as in-store purchases based on the delivery address. Some states offer marketplace facilitator laws requiring platforms like Amazon to collect tax on behalf of third-party sellers. Understanding these rules ensures you budget correctly for online purchases and can verify that the correct tax rate is being applied to your orders.

Frequently Asked Questions

How do I add sales tax to a price?

To add sales tax, multiply the pre-tax price by the tax rate expressed as a decimal, then add that amount to the original price. For example, a $50 item at an 8% tax rate incurs $4 in tax, giving a total of $54. A quicker method is to multiply the price by one plus the rate, so 50 × 1.08 = 54. This calculator does the arithmetic instantly and shows both the tax amount and the final total, which is helpful when budgeting for a purchase or preparing a quote that must include tax.

How do I remove sales tax from a total price?

To find the pre-tax price from a tax-inclusive total, divide the total by one plus the tax rate as a decimal. For an $54 total at 8% tax, the calculation is 54 ÷ 1.08 = $50, meaning $4 was tax. This reverse calculation is essential for accounting, expense claims, and invoicing where you need to separate the net price from the tax component. The calculator handles this back-calculation automatically so you do not have to rearrange the formula yourself.

Is sales tax the same everywhere?

No. Sales tax rates differ by country, and within some countries they vary by state, province, or city. In the United States, for instance, there is no national sales tax and rates are set locally, sometimes combining state and municipal portions. Other regions use value-added tax (VAT) or goods and services tax (GST) applied at each stage of the supply chain. Because rates and rules differ so much, always confirm the correct rate for the location of the sale before relying on a calculated total.

What is the difference between sales tax and VAT?

Sales tax is typically charged once, at the final point of sale to the consumer, and is common in the United States. Value-added tax is collected incrementally at each stage of production and distribution, with businesses reclaiming the tax they paid on inputs, and is widespread in Europe, Asia, and many other regions. For a shopper, both appear as an addition to the displayed price, but the underlying mechanics and reporting obligations for businesses are quite different.

Should tax be calculated before or after a discount?

In most jurisdictions, sales tax is applied to the discounted price, that is, after the discount has been subtracted, because tax is charged on the actual amount the customer pays. However, rules can vary for certain promotions, coupons, or manufacturer rebates. When in doubt, apply the discount first, then calculate tax on the reduced figure, and confirm against local regulations for any special cases.