Missouri Auto Sales Tax Calculator

The price before tax when adding tax, or the total paid including tax in reverse mode. Per item when the quantity is more than 1.
Picks the general statewide rate the state revenue department publishes (as of 5 September 2026). Choose "Custom rate" to type any rate instead.
County, city, transit and special-district tax for the address the sale is sourced to. Leave blank to apply the state rate only; the result then shows the combined range the state publishes so you can see what is missing.
Where the state taxes only the difference between the price and a trade-in (Missouri does, under RSMo 144.025), enter the allowance. Leave 0 elsewhere and in reverse mode.
Used for scheduled rate changes: the District of Columbia rises from 6% to 7% on 1 October 2026. Defaults to today.
Total including tax
30,845.00 USD
Sales Tax Calculator
Sales tax
845.00 USD
Price before tax
30,000.00 USD
Amount the tax was charged on
20,000.00 USD
Tax at the state rate
845.00 USD
Tax at the local rate
0.00 USD
Combined rate applied
4.2250 %
State rate used
4.2250 %
Local rate used
0.0000 %
Published combined rate, lowest
4.7250 %
Published combined rate, highest
12.2380 %
How the combined range was established
Computed from the DOR Sales and Use Tax Rate Tables for July-September 2026: 4.725% (St. Clair County unincorporated) to 12.238% (St. Ann city-wide TDD, St. Louis County). Every county has some local tax, so the 4.225% state-only rate applies nowhere. Source: https://dor.mo.gov/pdf/rates/2026/july2026.pdf (table updated 2026-05-22 (July-September 2026)).
Jurisdiction
Missouri
Rate applied for date
2026-09-14
Worked out from Texas Comptroller, Sales and Use Tax: 6.25% state rate; local jurisdictions up to 2% for a maximum combined rate of 8.25% and 6 other sources.
Not every state gives credit for a trade-in, and some cap it. Missouri does under RSMo 144.025; confirm the rule where you are registering.
No local rate was entered, so only the Missouri state rate of 4.225% was applied. Local sales taxes apply in Missouri; combined rates published by the department run 4.725% to 12.238%. Enter the local rate for the sale address to get the full figure.
State rates are the general rates each revenue department publishes as of 5 September 2026; local rates change quarterly and depend on the exact address, so confirm the combined rate with the state department for the sale location. Food, lodging, vehicle and other special rates are not modelled.

How this is worked out

4 steps
  1. Missouri general rate on 2026-09-14: 4.225% (4.225% state sales and use tax (General Revenue 3.0% + Education 1.0% + Conservation 0.125% + Parks/Soils 0.1%).)
  2. Taxable amount = 30000 - 10000 trade-in allowance = 20000
  3. Sales tax = 20000 x 4.225% = 845
  4. Total = 30000 + 845 = 30845

Results are general information, not financial, tax, legal, medical or engineering advice.