Missouri Sales Tax Calculator (2026) — Add or Reverse Tax
Missouri's combined sales tax rate is 8.44% (4.22% state + 4.22% average local). Use the calculator below to add Missouri sales tax to a price, or reverse a tax-included total to find the pre-tax price and exact tax amount.
How to use this calculator:
- Adding tax — enter a pre-tax price, pick "Add tax to price," and the calculator applies the Missouri rate to show the tax amount and final total.
- Reversing (extracting) tax — enter a total that already includes tax, pick "Extract tax from total," and the calculator divides by 1 + the rate to isolate the pre-tax price and the exact tax paid.
- Pick the rate that matches your situation: the average combined rate is a good statewide estimate, but the state-only or maximum-local rate is more precise if you know the exact city or county.
Understanding Missouri Sales Tax
Missouri's state sales tax rate is 4.22%, and local jurisdictions add an average of 4.22% on top, bringing the typical combined rate to 8.44%. Rates vary by city and county — the highest combined rate in Missouri can reach 9.99%.
Missouri also levies a state income tax, which shapes how much the state relies on sales tax revenue relative to other funding sources.
Groceries
taxed at a special reduced state rate of 1.225%, well below the general 4.225% state rate
Largest city
Kansas City
State income tax
Yes
Why Reverse Sales Tax Calculation Matters
Receipts, invoices, and marketplace payouts usually show only the tax-included total — not the pre-tax price. Reversing the calculation matters for bookkeeping (separating revenue from tax collected), expense reports (reimbursing only the pre-tax cost), and price comparisons (checking what an item actually costs before Missouri's tax is applied). Because dividing by (1 + rate) is not the same as simply subtracting the rate from the total, doing this by hand is a common source of errors — the calculator above handles it exactly.
Missouri Taxability at a Glance
🛒 Groceries
Reduced rate
👕 Clothing
Taxable
💊 Prescription drugs
Exempt
History & Rate Breakdown
Missouri enacted its sales tax in 1934 and added a companion use tax in 1959. Since then, the state has allowed an unusually large number of overlapping local jurisdictions — cities, counties, and special districts — to each layer on their own local option tax.
Missouri's 8.44% average combined rate comes from a relatively low 4.225% state rate plus local option taxes that average 4.22% but can run much higher — some Missouri municipalities combine city, county, and special-district rates up to roughly 8% in local add-ons alone, and Missouri has over 750 separate local tax jurisdictions in total.
Where the Money Goes
With more than 750 individual local tax jurisdictions, Missouri's system gives cities, counties, and special districts significant independent control over their own sales tax revenue, but that same fragmentation is what makes Missouri one of the more complex states for multi-location retailers to administer correctly.
Business Use Case: Registering & Collecting Missouri Sales Tax
A retailer shipping to different addresses within the Kansas City or St. Louis metro areas may cross city lines, county lines, and special taxing district boundaries within just a few miles — meaning Missouri sellers typically rely on address-level rate lookups rather than a single county-level rate.
Sales Tax Terms Glossary
Combined rate
The state sales tax rate plus any applicable local (city, county, or special district) rates — the actual rate charged at checkout in a given location.
Reverse sales tax
The process of working backward from a tax-included total to find the pre-tax price and the exact tax amount, using total ÷ (1 + rate) = pre-tax price.
Economic nexus
A sales threshold (in dollars, transaction count, or both) that obligates an out-of-state seller to collect and remit sales tax even without a physical presence in the state.
Marketplace facilitator
A platform (e.g. Amazon, Etsy, eBay) that collects and remits sales tax on behalf of third-party sellers under most states’ marketplace facilitator laws.
Real-World Example
A $500.00 purchase in Missouri at the average combined rate of 8.44%:
- Tax amount: $500.00 × 8.44% = $42.20
- Total price: $500.00 + $42.20 = $542.20
Missouri Sales Tax Compliance for Sellers
Remote and online sellers establish economic nexus in Missouri once they exceed $100,000.00 in annual sales (no separate transaction-count test). Once nexus is established, a seller must register with the state, collect Missouri sales tax at checkout, and file returns on the state's required schedule. Marketplace facilitators (Amazon, Etsy, eBay, Walmart) generally collect and remit on behalf of third-party sellers automatically.
Frequently Asked Questions — Missouri Sales Tax
What is the sales tax rate in Missouri?▾
Does Missouri tax groceries?▾
Does Missouri have a state income tax?▾
When do online sellers need to collect Missouri sales tax?▾
How do I calculate Missouri sales tax on a purchase?▾
How do I reverse Missouri sales tax to find the price before tax?▾
What is the formula to back out sales tax from a receipt in Missouri?▾
References & Sources
Rates last verified January 2026. Missouri sales tax rates and thresholds can change — always confirm current figures with the Missouri Department of Revenue before filing or invoicing. This tool is for estimation and educational purposes only and is not tax, legal, or accounting advice.
Jordan Hayes
Verified AuthorLead Content Editor & Personal Finance Specialist
Jordan Hayes is a personal finance content strategist with 9+ years building educational finance and health resources. He has written and fact-checked over 200 personal finance guides covering mortgage amortization, retirement planning, tax strategy, and budgeting. His work applies IRS publications, Federal Reserve data, and peer-reviewed research to make complex calculations accessible.