How Much Does an Ignition Interlock Cost?
Expect to pay $1,000-$2,000 per year for an ignition interlock device. Here's a complete breakdown of all costs involved.
$50-200
Installation
$70-150
Monthly
$1,000-2,000
Per Year
Complete Cost Breakdown
All potential IID costs you may encounter during your requirement period.
| Fee Type | Cost | Frequency |
|---|---|---|
| Installation | $50-200 | One-time |
| Monthly Lease/Rental | $70-150 | Monthly |
| Monthly Calibration | $0-50 | Monthly |
| Removal | $50-100 | One-time |
| Lockout Reset | $50-100 | Per incident |
| Violation Reporting | $25-100 | Per incident |
Estimate Your Total Cost
12-Month IID Cost Estimate
* Does not include potential violation fees or lockout resets
Cost by Provider
Compare costs across the three major IID providers.
| Provider | Install | Monthly | Calibration |
|---|---|---|---|
| Intoxalock | $0-125 | $70-90 | Included |
| Smart Start | $0-200 | $75-95 | Included |
| LifeSafer | $50-150 | $70-100 | $20-50 |
Cost by State
IID costs can vary by state due to different requirements and approved providers.
Texas
Duration: 6-24 months
Arizona
Duration: 12+ months
Georgia
Duration: 12 months
Colorado
Duration: 8-24 months
Ohio
Duration: 6-36 months
Tennessee
Duration: 6-12 months
North Carolina
Duration: 12-36 months
Watch Out for Hidden Costs
Violation fees
Failed tests, missed calibrations, or tampering attempts can add $50-200+ each
Lockout fees
If your device locks and needs to be reset, expect $50-100
Early termination
Removing the device early may incur contract penalties
Extended requirement
Violations can extend your IID period, adding months of additional cost
Ways to Reduce IID Costs
Compare Providers
Get quotes from all approved providers in your state. Monthly costs can vary by $20-40 between companies.
Look for Promotions
Many providers offer free or discounted installation. Intoxalock frequently runs $0 installation specials.
Ask About Indigent Programs
Many states and providers offer reduced rates for low-income individuals. Ask about assistance programs.
Avoid Violations
The best way to keep costs down: follow all rules, never miss calibrations, and avoid anything that could trigger a false positive.
Financial Assistance Programs
If you're struggling to afford an IID, several options may help:
- State indigent programs - Many states mandate reduced rates for qualifying individuals
- Provider payment plans - Ask about spreading installation costs over time
- Public defender assistance - May help advocate for fee waivers
- Court fee waivers - In some cases, courts can reduce or waive IID fees
Compare IID Providers
Full comparison of features, costs, and customer service
Installation Guide
What to expect during IID installation
Sources
Cost information compiled from provider websites, state DMV publications, and user reports as of January 8, 2026. Actual costs may vary.
Disclosure: This page contains affiliate links. We may earn a commission if you install an interlock device through our partners, at no additional cost to you.