Sales Tax Calculator
Look up combined state, county, and city sales tax rates by state and calculate total tax on any purchase amount.
What Is the Sales Tax Calculator?
Sales tax is a consumption tax levied by state and local governments on the sale of goods and certain services. Unlike income tax, sales tax is collected at the point of sale and remitted by the seller. The United States has no federal sales tax; instead, 45 states plus the District of Columbia impose their own rates, ranging from 2.9% (Colorado) to 7.25% (California) at the state level. Five states -- Alaska, Delaware, Montana, New Hampshire, and Oregon -- have no statewide sales tax, though Alaska allows local jurisdictions to impose their own. On top of state rates, counties, cities, and special districts often add additional levies, creating combined rates that can exceed 11% in some jurisdictions. This calculator lets you estimate total sales tax on a purchase by combining the state base rate with local surcharges. After the South Dakota v. Wayfair Supreme Court decision (2018), states can require remote sellers and marketplace facilitators to collect sales tax even without physical presence, significantly expanding the obligation for e-commerce businesses.
How to Use This Calculator
Enter Purchase Amount
Input the pre-tax price of your purchase or the total value of items you are buying.
Select Your State
Choose the state where the purchase is made (or shipped to for online orders). The calculator applies the correct state base rate.
Add Local Rate
Enter any additional county, city, or district sales tax rate. Check your local government website for the exact combined local rate in your jurisdiction.
Review Total
See the state tax, local tax, combined total, and the all-in cost of your purchase.
Key Concepts
Origin vs. Destination Sourcing
Origin-based states (e.g., Texas, Ohio) tax based on the seller's location. Destination-based states (majority) tax based on the buyer's shipping address.
Sales Tax Nexus
Physical or economic presence that creates a tax collection obligation. Post-Wayfair, economic nexus thresholds are typically $100K in sales or 200 transactions.
Exempt Categories
Most states exempt groceries (not prepared food), prescription drugs, and medical devices. Some exempt clothing (PA, NJ, NY on items under $110).
Use Tax
A complementary tax owed by the buyer when sales tax was not collected (e.g., out-of-state purchases). Same rate as sales tax. Technically required but historically under-enforced for consumers.
Marketplace Facilitator Laws
Amazon, eBay, Etsy, and other platforms are now required to collect and remit sales tax on behalf of third-party sellers in most states.
Expert Insights
Multi-State Compliance: For consumers, sales tax is straightforward. For businesses, it is one of the most complex areas of tax compliance. There are over 13,000 distinct sales tax jurisdictions in the United States, each with its own rate, rules, exemptions, and filing requirements. A product taxable in one state may be exempt in another, and rates change frequently -- over 600 rate changes occur annually.
Post-Wayfair E-Commerce: The Wayfair decision reshaped e-commerce taxation. If you sell online and exceed the economic nexus threshold in a state (typically $100,000 in sales or 200 transactions in a calendar year), you must register, collect, and remit sales tax in that state regardless of physical presence. Automated compliance tools like Avalara, TaxJar, or Vertex are virtually mandatory for multi-state sellers.
Streamlined Sales Tax: If you are a small business, check whether your state offers a Small Seller Exception or simplified registration through the Streamlined Sales Tax program (SST). SST member states offer free compliance software to registered sellers.
Frequently Asked Questions
This calculator provides estimates for educational purposes only. Tax laws change frequently and individual circumstances vary. These estimates do not constitute tax advice. Consult a qualified CPA or tax professional before making tax-related decisions.
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