What an ignition interlock costs in Missouri
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Missouri does not publish a price, so the honest answer is the national one: NHTSA puts installation at $70 to $90 and monitoring at about $70 a month, roughly $3 to $4 a day. A quote far above that is the provider's, not the state's.
Three charges make up the bill, not one: fitting the device, keeping it on the car, and taking it out at the end. Over a full term the monthly fee is the bulk of it, which is why a cheap installation on a long requirement costs more than a dearer one on a short.
Missouri publishes no figure, so here is the national one
NHTSA puts installation at $70–$90 and monitoring at about $70 a month, roughly $3–$4 a day. Only 14 jurisdictions publish their own numbers or cap what a provider may charge; Missouri is not among them, so a quote well above the national range is the provider’s decision rather than the state’s.
What decides the total in Missouri
The monthly fee matters less than how long you pay it, and that is set by the requirement rather than the provider. In Missouri a first offense carries 90 days on an immediate restricted privilege with the device (request within 15 days of the notice), against a 30-day suspension plus 60-day restricted privilege without it The programme is run by Missouri Department of Revenue, Driver License Bureau, which is also who decides whether a recorded event extends it.
That is the part worth budgeting for: events add months, and months are what the bill is made of. What counts as a violation → · All Missouri rules and centers →
Who operates in Missouri, and why it changes the price
6 approved networks run in Missouri: Intoxalock (147), LifeSafer (98), Smart Start (97), Low Cost Interlock (61), RoadGuard Interlock (35), ADS Interlock (7). Nothing here caps what any of them may charge, so the quote is the price and two quotes are worth the phone calls.
Where it is fitted in Missouri
310 certified points in our index. The busiest cities:
Cost questions in Missouri
How much does an ignition interlock cost in Missouri?
Missouri does not publish a price, so the honest answer is the national one: NHTSA puts installation at $70 to $90 and monitoring at about $70 a month, roughly $3 to $4 a day. A quote far above that is the provider's, not the state's.
Does Missouri cap what a provider can charge?
No. Missouri does not publish provider prices at all, so the quote is the price. That is the argument for getting two of them: nothing constrains what a provider asks, and in states without a cap the same brand quotes differently in different cities.
What else does Missouri charge on top of the device?
We have no separate state fee schedule on file for Missouri. Reinstatement and licensing charges usually sit outside the interlock program itself — check with Missouri Department of Revenue, Driver License Bureau before you budget.
Where can I have an interlock fitted in Missouri?
We index 310 certified installation points across 144 Missouri cities. Book with a provider the state approves rather than the nearest pin on the map: time on an unapproved device does not count toward the term.