Missouri Sales Tax Calculator

How to use

1. Enter the untaxed price in the Amount field.
2. Type the combined rate: 4.225 for the state base, approximately 8.3 as a typical stacked total, or your exact local figure.
3. Leave the mode on Add tax to amount, or choose Remove tax from total for a receipt.
4. Read the net amount, tax, and gross output.

General information only — not medical, financial or legal advice. Figures cross-checked against public official sources (IRS / HMRC / NHS / WHO guidance) as of 2026-08. For decisions that matter, confirm with a licensed professional in your country.

About this tool

Missouri's state base is an odd-looking 4.225 percent, and the real rate comes from stacking: county tax, then city tax, then special districts, each layered on top, which lifts the average combined figure to approximately 8.3. The calculator handles the resulting arithmetic in both directions. A 100 dollar sale at the bare base adds 4.22 in tax once the register rounds, for a 104.22 total, while the same 100 at 8.3 combined adds 8.30 for a 108.30 total. Groceries get special treatment, taxed at a reduced 1.225 percent state rate rather than the full base, though stacked local portions still apply to food. Switch to Remove mode and the tool divides a receipt total by 1 plus the rate, recovering the pre-tax price from any final figure. Results are estimates from the rate you enter; Missouri stacks county, city, and district taxes by address. Verify with the Missouri Department of Revenue. Not tax advice.Because city, county, and district layers stack rather than merge, the same purchase can cross several effective rates within one metro area. Kansas City and St. Louis both sit well above the base. Food's reduced state slice dates back decades and makes grocery math differ from general merchandise at the same register.

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