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🧮 Sales Tax Calculator

Enter an order subtotal and a tax rate to get the tax owed, the total with tax added, and how much tax is baked into a tax-inclusive price. Useful for pricing, checkout, and bookkeeping.

$0$1,000
0%30%
Tax Amount
$4.04
Added on top of price
Total (Tax Exclusive)
$53.04
Price + tax
Tax if Price Includes It
$3.73
Tax-inclusive (VAT style)
Pre-Tax Price (inclusive)
$45.27
Net of included tax
At 8.25%, this $49.00 order carries $4.04 in tax. Confirm your nexus obligations — requirements vary by jurisdiction.
Formula:Tax = Amount × Rate% | Inclusive: Tax = Amount − Amount ÷ (1 + Rate%)
Industry Benchmarks
US Average Sales Tax~7–10%
UK VAT20%
EU VAT (varies)19–25%
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How to use this tool

  1. Enter the order subtotal. The pre-tax amount of the order.
  2. Enter the sales tax or VAT rate. Your applicable rate as a percentage — it varies by state or country.
  3. Read your numbers. The calculator shows the tax, the total with tax added, and the tax portion of a tax-included price.

Sales Tax Calculator — explained

Sales tax (or VAT) is added to the order subtotal at checkout: Tax = Subtotal × Rate. In the US, rates vary by state and locality; in much of the world, a single VAT rate applies and is often shown tax-inclusive.

Whether you collect tax depends on nexus — a connection to a jurisdiction (often based on where you, your customers, or your sales volume are). This calculator handles the math; your obligations depend on your situation, so confirm them or check with an accountant.

The third output is handy for tax-inclusive pricing common outside the US: it extracts how much of a displayed price is tax, so you can see your true pre-tax revenue.

Use this in context

Sales Tax Calculator — common questions

How do you calculate sales tax?
Sales Tax = Order Subtotal × Tax Rate. For a $49 order at 8.25%, the tax is 49 × 0.0825 = $4.04, for a total of $53.04.
Do I need to charge sales tax on my store?
It depends on nexus — your connection to a jurisdiction, often based on location or sales volume. The math is simple; the obligation varies, so confirm your specific situation.
What is the difference between sales tax and VAT?
Sales tax (common in the US) is added at checkout and varies by state/locality. VAT (common elsewhere) is usually a single rate often shown tax-inclusive in the displayed price.
How do I find the tax inside a tax-included price?
Divide the price by (1 + rate), then subtract from the price. The calculator does this automatically in the third result so you can see your pre-tax revenue.
Original content by First Sale Society — . Free, no paywall.