How do I find my exact local sales tax rate?

The best source is your state's Department of Revenue website, which provides lookup tools by address or ZIP code. Sales Tax Institute and Avalara also maintain free rate lookup tools. Rates can vary by city, county, and even special districts, so state rate alone is often insufficient.

Are all purchases subject to sales tax?

No — most states exempt groceries, prescription drugs, and sometimes clothing. Some states exempt farm equipment, manufacturing machinery, or digital goods. The taxable item list varies dramatically by state, which is why a blanket rate calculator is a starting point rather than an authoritative answer.

How does the reverse sales tax calculation work?

If you have a tax-inclusive total, divide by (1 + tax rate as decimal) to get the pre-tax price. For example: $108.25 ÷ 1.0825 = $100.00 pre-tax, $8.25 tax. This calculator does this automatically when you select 'reverse calculate.'

Does sales tax apply to online purchases?

Yes, since the 2018 South Dakota v. Wayfair Supreme Court ruling, online retailers are required to collect sales tax in states where they have economic nexus (usually $100,000 in sales or 200 transactions). Most major online retailers now collect tax automatically based on your shipping address.

🔧Utilities

Sales Tax Calculator: What's the Real Cost After Tax?

What will this purchase cost after tax?

What This Does

Sales tax is the silent add-on that turns a $299 TV into a $323 purchase and a $25,000 car into a $27,125 transaction. It's predictable math — but most people estimate it wrong, especially across state lines, for large purchases, or when reverse-engineering a tax-inclusive price. This calculator handles three common scenarios: calculating the tax amount and final price from a pre-tax price; reverse-calculating the pre-tax price from a total that already includes tax; and comparing the cost of the same purchase across different tax jurisdictions. Sales tax rates in the U.S. range from 0% (Oregon, Montana, New Hampshire, Delaware, and Alaska) to over 10% in parts of Louisiana, Tennessee, and Arkansas when state and local rates combine. For a $20,000 vehicle purchase, that difference is $2,000 in real money. This tool is useful for everyday shoppers wanting to budget accurately, small business owners calculating pricing, travelers comparing purchase locations, and anyone who's ever wondered "how much would this cost in [other state]?" The reverse calculation is especially practical: if a receipt shows $547.83 total and you need to know the pre-tax price for an expense report or return, this calculator gives you the exact split. Sales tax is simple math done precisely. This calculator makes it instant.

When Should You Use This?

→Budgeting for a large purchase and want the exact tax-inclusive cost upfront
→Comparing prices across states for a major purchase like a vehicle or electronics
→Running a small business and need to calculate sales tax on invoices
→Reverse-calculating the pre-tax price from a tax-inclusive total for expense reports
→Calculating the tax on a purchase that spans multiple tax rates (state + county + city)

Example Scenario

Kevin is buying a new MacBook Pro listed at $1,999. He's shopping in Dallas, Texas where the combined state (6.25%) and local (2%) sales tax rate is 8.25%. The sales tax adds $164.92 to his purchase for a total of $2,163.92. He checks: if he were buying in Portland, Oregon (0% sales tax), he'd pay exactly $1,999. The trip to Oregon doesn't make sense for a laptop — but for a $40,000 car, the same math saves $3,300.

Sales Tax Calculator

Add Tax · Remove Tax · Compare State Rates

Results update in real time as you adjust any input.

Mode

Pre-Tax Price ($)

State Tax Rate (%)

Local Tax Rate (%)

Quick State Presets

About This Calculator

This sales tax calculator operates in three modes: Add Tax (calculate the total price after adding state and local sales tax to a pre-tax price), Remove Tax (extract the original pre-tax price and tax amount from a tax-inclusive total using the correct division formula), and Compare States (compare the exact dollar tax difference between two locations for the same purchase). All results update in real time as you type. Quick-select preset buttons for 8 major US states make it easy to check common rates.

The Breakdown tab shows a donut pie chart of pre-tax price vs state and local tax components, plus a horizontal bar chart with individual component amounts. The States tab renders a bar chart of combined sales tax rates for 15 US states with your current rate highlighted and a reference line, plus a full comparison table showing the exact tax amount on your purchase for each state with the dollar difference from your rate. The Compare tab (active in Compare States mode) shows a side-by-side bar chart and detailed table.

A tax score (0–100) reflects the burden of the combined rate — lower rates score higher. Dynamic accent colours shift with rate: emerald (no tax or very low), green (low, ≤4%), indigo (average, ≤7%), amber (above average, ≤9%), red (high, 9%+). State rates shown are representative combined averages — actual rates vary by specific city, county, and district. Export to PDF generates a complete report with all 15 state comparisons and key insights.

Results are estimates only and do not constitute professional advice.