MarginCalculator.org

Professional Sales Tax Calculator

Calculate sales tax accurately with support for all US states. Perfect for businesses and retail calculations.

Start Calculating

Key Features

All US States

Built-in rates for all US states with option for custom rates.

Dual Calculation Modes

Add tax to base amount or extract tax from total amount.

Instant Results

Get base amount, tax amount, and total instantly.

Choose whether to add sales tax to amount or extract sales tax from amount

Enter the amount for sales tax calculation

Select your state or choose custom rate

How to Use the Sales Tax Calculator

Add Sales Tax (Exclusive)

  1. Select "Add Sales Tax (Exclusive)" mode
  2. Enter the base amount (pre-tax)
  3. Choose your state or enter a custom rate
  4. Click Calculate to see tax amount and final price

Extract Sales Tax (Inclusive)

  1. Select "Extract Sales Tax (Inclusive)" mode
  2. Enter the total amount (including tax)
  3. Choose your state or enter a custom rate
  4. Click Calculate to see base amount and tax amount

Understanding Sales Tax

State Sales Tax

  • Varies by state and locality
  • Some states have no sales tax
  • Can include local surtaxes
  • May have exemptions for certain items

Common Tax Scenarios

  • Retail purchases
  • Online shopping
  • Business purchases
  • Service-based transactions

Important Notes

  • Tax rates shown are base state rates and may not include local taxes
  • Some cities and counties may add additional sales tax
  • Tax rates may change - verify current rates with your local tax authority
  • Some items may be tax-exempt or have different rates