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$108.00
Total Price After Tax
$8.00
Sales Tax
8.00%
Tax Rate
Price before tax: $100.00 + $8.00 tax = $108.00
$100.00
Price Before Tax
$8.00
Sales Tax
8.00%
Tax Rate
Total $108.00 includes $8.00 tax (8% of $100.00)
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Sales Tax Calculator: Calculate Total Price Including Tax Instantly
Welcome to the Sales Tax Calculator — the most comprehensive tax calculation tool on the internet. Whether you're shopping online, budgeting for a big purchase, running a small business, or filing taxes, this calculator provides instant, accurate results. Includes tax rates for all 50 US states and reverse tax calculation.
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Price + Tax
Calculate total price including sales tax
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Reverse Tax
Find price before tax from total
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50 State Rates
Built-in tax rates for all US states
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Instant Results
Real-time calculation as you type
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Save History
Never lose your calculations
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Export Reports
Download CSV/JSON files
🎓 Pro Tip: Sales tax rates vary by state AND local jurisdiction (city, county, special districts). Our state rates are base rates — actual combined rates can be 1-3% higher. Check your local rate for precise business calculations.
How to Use This Sales Tax Calculator
1. Calculate Total Price Including Tax
Enter the price before tax and the sales tax rate (or select a state). The calculator instantly shows:
Total price after tax — what you'll actually pay
Tax amount — how much is sales tax
Tax rate — the percentage used
2. Calculate Price Before Tax (Reverse Tax)
If you know the total price you paid and the tax rate, use Reverse Tax mode to find the original price before tax. This is useful for:
Determining pre-tax cost of a business purchase
Calculating tax-deductible amounts
Verifying if you were charged correctly
Sales Tax Rates by State (2026)
Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. However, local taxes may apply in some areas of Alaska.
Price Before Tax = Total Price ÷ (1 + Tax Rate ÷ 100).
Sales Tax vs VAT vs GST
Sales tax (US) is applied only at the final point of sale to the end consumer. VAT (Value Added Tax, used in Europe and many other countries) is applied at each stage of production and distribution. GST (Goods and Services Tax, used in Canada, Australia, India) is similar to VAT but with different implementation. This calculator works for all types — just enter your applicable tax rate.
Small Business Sales Tax Obligations
Nexus: If you have physical presence (office, warehouse, employees) or economic nexus (exceeding state sales thresholds), you must collect sales tax from customers in that state.
Economic Nexus Thresholds: Most states require collection if you exceed $100,000-$500,000 in sales or 200+ transactions annually in that state.
Tax Filing: Sales tax is typically filed monthly, quarterly, or annually depending on your sales volume.
Use Tax: If a seller doesn't charge sales tax, customers may owe "use tax" (same rate as sales tax) on their state tax return.
Frequently Asked Questions
Which states have no sales tax? ▼
Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. However, some localities in Alaska may impose local 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 approximately 7.5%. Rates range from 0% to over 10% in some cities.
How do I calculate sales tax for my business? ▼
Multiply your sale price by your tax rate (as a decimal). For example, $500 sale × 0.075 = $37.50 tax. The customer pays $537.50 total.
What is the difference between sales tax and use tax? ▼
Sales tax is collected by sellers at the time of purchase. Use tax is paid directly by the buyer when a seller doesn't collect sales tax (e.g., online purchases from out-of-state sellers without nexus).
Are digital products subject to sales tax? ▼
It depends on the state. Many states now tax digital products (e-books, streaming services, software downloads). Check your state's specific rules.
Is sales tax included in the price displayed? ▼
In the US, sales tax is almost always added at checkout. In most other countries (and some US states for certain items), tax is included in the displayed price.
How accurate is this sales tax calculator? ▼
Our calculator uses precise arithmetic. State rates are accurate as of 2026, but local rates vary by city/county. For exact business calculations, verify with your local tax authority.
What's the formula for reverse sales tax calculation? ▼
Price Before Tax = Total Price ÷ (1 + Tax Rate ÷ 100). Example: $108 ÷ 1.08 = $100. This is useful for tax deduction purposes.