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Sales Tax Guide

Calculate sales tax, VAT, and stacked tax structures

Understanding sales tax conversions and rate compositions is critical for retailers, buyers, and financial modeling. Different regions use diverse models—ranging from a flat Value Added Tax (VAT) in the EU to state, county, and municipal local sales taxes in the United States. Stacked or compound tax configurations allow you to accurately model your local purchase or sale liability. For official guidelines on business sales tax obligations, refer to the U.S. Internal Revenue Service (IRS) or the UK HM Revenue & Customs (HMRC).

Gross-up vs. Scorporation

Ensure you select "Add Tax" to add tax to a net base, or "Remove Tax" to find the pre-tax matrah/base of a retail price.

State and Local Taxes

In the US, combined sales tax rates average state and county components. Enter local rates separately to see a granular cost breakdown.

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Check Local Nexus Rules

E-commerce and physical sellers must collect sales tax based on their shipping nexus. Check state tax departments for registration requirements.

Accurately breaking down pre-tax prices and tax sums protects budgets and ensures accounting compliance.

Frequently Asked Questions

  • "Add Tax" (Gross-up) calculates the total price by adding tax to the base net price. "Remove Tax" (Reverse) calculates the original pre-tax price by subtracting tax from the final retail price.
  • Stacked (additive) taxes are calculated separately on the same pre-tax amount (e.g. State Tax 5% and Local Tax 2% both apply to the base price of $100). Compound taxes apply the second tax rate on the price after the first tax has been added (e.g. Tax 1 is added first, and then Tax 2 applies to the new subtotal).
  • Compound taxes are less common today but have been used in countries like Canada (where provincial PST was compounded on federal GST in Quebec before reforms). Some local municipal levies may still apply on top of state tax subtotals.
  • Tax presets are quick shortcut buttons that represent standard sales tax or VAT rates (like 5% for GST, 10% for state sales tax, or 20% for standard UK VAT). Clicking them automatically updates the tax rate field.

Sales tax by state

US states

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Alabama
Arizona
Arkansas
California
Colorado
Connecticut
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Nebraska
Nevada
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
District of Columbia

Sales Tax Calculator

Add or Remove Sales Tax

Inputs

Calculation Mode

Calculation Mode

Sales Tax Setup

$
%
Tax Presets:

Local & Compound Tax

Results

Final Price (Gross)

$110.00

Pre-Tax Price (Net): $100.00

Price Composition

$100.00
$10.00
Pre-Tax Amount
Primary Tax
Pre-Tax Price (Net)
$100.00
Primary Tax
$10.00
Total Tax Amount
$10.00
Final Price (Gross)
$110.00