What an ignition interlock costs in Arizona
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Arizona does not publish provider prices — they are set by the approved provider, not by the state. Nationally, nHTSA puts installation at $70 to $90 and monitoring at about $70 a month, roughly $3 to $4 a day. The state publishes only its own charges: ADOT fee per device installed (collected by your provider) $20, charged again if the device moves to another vehicle. 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.
What Arizona lets a provider charge
| Charge | Amount | What it covers |
|---|---|---|
| Installation | Not published | set by the provider; the state publishes only its own charge |
| Monthly | Not published | set by the provider |
| Removal | Not published | Taking the device out at the end of your term |
State guidance figure · Ignition Interlock Stakeholders FAQ — Arizona DOT · checked 2026-08-23
The fees nobody quotes you over the phone
These are charged on top of the three above, and they are where a cheap-looking Arizona quote turns expensive.
| Fee | Amount |
|---|---|
| ADOT fee per device installed (collected by your provider) | $20, charged again if the device moves to another vehicle |
- Providers must clearly post all client fees for installation, removal and inspection.
- A provider may not charge you to replace a device that turns out to be faulty.
What decides the total in Arizona
The monthly fee matters less than how long you pay it, and that is set by the requirement rather than the provider. In Arizona a first offense carries at least 12 months on a standard first conviction; longer at higher readings — 12 months for Extreme DUI at 0.15%, 18 months for Super Extreme at 0.20% (A.R.S. 28-1382) The programme is run by Arizona MVD (Department of Transportation), 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 Arizona rules and centers →
What the Arizona term actually adds up to
Arizona sets 12 months for a first offense, and that is the multiplier that matters. At the national reference of about $70 a month, the monitoring alone comes to about $840 over the term, before the $70-plus fitting fee and anything charged at removal.
Which is why the monthly rate decides the bill and the installation deal does not: one extra month costs more than the gap between the cheapest and dearest fitting. And the term is a floor — events recorded by the device push it further out.
Who operates in Arizona, and why it changes the price
6 approved networks run in Arizona: Intoxalock (128), Smart Start (91), LifeSafer (68), Low Cost Interlock (30), ADS Interlock (21), Alcolock USA (18). 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 Arizona
346 certified points in our index. The busiest cities:
Cost questions in Arizona
How much does an ignition interlock cost in Arizona?
Arizona does not publish provider prices — they are set by the approved provider, not by the state. Nationally, nHTSA puts installation at $70 to $90 and monitoring at about $70 a month, roughly $3 to $4 a day. The state publishes only its own charges: ADOT fee per device installed (collected by your provider) $20, charged again if the device moves to another vehicle. A quote far above that is the provider's, not the state's.
Does Arizona cap what a provider can charge?
Not as a hard ceiling. Arizona publishes figures, but they are guidance rather than a cap, so the number tells you what is normal rather than what is forbidden. Get a second quote if yours sits well above it.
What else does Arizona charge on top of the device?
Beyond what the provider bills, the state has its own charges: ADOT fee per device installed (collected by your provider) $20, charged again if the device moves to another vehicle. These are the lines people are surprised by, because the vendor quote does not include them.
Where can I have an interlock fitted in Arizona?
We index 346 certified installation points across 88 Arizona 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.