Missouri Ignition Interlock Cost Calculator 2026
Missouri does not require an ignition interlock after a first DWI conviction, so there is no first-offense device cost to add up. Change the offense level below to price a second or third offense.
Your Missouri DWI estimate will appear here
Answer the questions and press the button. You will get a low, typical and high figure, with each cost listed on its own line.
- Uses this state's own fines, suspension and interlock rules
- Market costs such as attorney fees are labelled as estimates
- Free, and nothing to sign up for
Missouri DWI FAQ
How much does a DWI cost in Missouri?
Attorney fees for a first-offense DWI in Missouri typically run $2,000 to $7,500 on our estimates, and the fine is $0 to $500 before court costs. Adding insurance, interlock, education, reinstatement and lost time from work, our calculator puts a typical first offense at about $14,575 (range $6,969 to $23,125) with its default answers; the median of our 50 state estimates is $17,615.
How long is your license suspended for a first DWI in Missouri?
A first-offense DWI conviction in Missouri carries a license suspension of 90 days. A hardship or restricted license may be available during this period.
Is an ignition interlock device required in Missouri for a first DWI?
Our Missouri data shows no interlock requirement for a first-offense DWI.
How long is SR-22 insurance required after a DWI in Missouri?
Missouri requires SR-22 high-risk insurance filing for 2 years following a DWI conviction.
Can a DWI be expunged in Missouri?
Missouri allows DWI expungement under certain conditions, typically after a waiting period of 10 years following completion of your sentence.
Missouri DWI figures this calculator uses
- Ignition interlock, first offense
- None
- Ignition interlock, second offense
- 6 months
- Ignition interlock, third offense
- 6 months
- Required for every offense
- No
- Typical monthly lease and monitoring (estimate)
- $90
Statutory figures were checked against Missouri law (primary source) and last verified May 2026. Typical ranges are market estimates, not law; see our methodology.
Worked example
With the calculator's default answers (offense number: First offense; number of vehicles you own: 1 vehicle):
Missouri does not require an ignition interlock device after a first DWI conviction, so there is no device cost to estimate. A second DWI conviction carries a 6-month interlock requirement.
Change the answers in the calculator above to see your own estimate.
On our estimates, a typical first-offense DWI in Missouri comes to about $14,575, the 39th highest of the 50 states. The median of our 50 state estimates is $17,615. These come from the total-cost calculator with its default answers, not from a national survey.
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Missouri DWI Total Cost Calculator →Missouri DWI Overview
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Missouri Attorney Cost →Missouri Total Cost →Missouri SR-22 Insurance →Missouri Suspension Timeline →Related Guide
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