Ohio Ignition Interlock Device (IID) Requirements
After a OVI in Ohio, you'll likely need an ignition interlock device to drive legally. Here's what you need to know about requirements, costs, providers, and how to complete your IID period without violations.
6-12 mo
1st Offense
Typical duration
1-3 years
2nd+ Offense
Enhanced requirement
$70-150
Monthly Cost
Average range
IID requirements can vary by county and judge. Always confirm your specific requirements with your court order or Ohio DMV.
The enactment of House Bill 388, known as "Annie's Law," fundamentally altered the OVI (Operating a Vehicle Impaired) landscape in Ohio, effective April 6, 2017.
Ignition Interlock Device (IID) Requirements in Ohio
Ohio utilizes Ignition Interlock Devices (IIDs) as a key component in its strategy to combat impaired driving. Annie's Law recalibrated incentives for continuous monitoring, and this article details the IID requirements in Ohio.
When an IID is Required
Annie's Law introduced a statutory preference for monitoring—specifically Ignition Interlock Devices (IID) and Continuous Alcohol Monitoring (CAM). While the law is most famous for its IID incentives (allowing unlimited driving privileges for first-time offenders who use an interlock), it simultaneously broadened the court's power to utilize SCRAM for those ineligible for IID or those requiring total abstinence monitoring.
Duration of IID Requirement
The duration for which an IID is required varies depending on the number of prior OVI convictions within a 10-year "lookback period."
How an IID Works
An IID is a breathalyzer device installed in a vehicle. The driver must blow into the device before starting the car. If the device detects a Blood Alcohol Concentration (BAC) above a pre-set limit (typically 0.025%), the vehicle will not start.
Before Starting: The driver blows into the device.
Rolling Retests: The device requires random retests while the vehicle is in operation. This is to prevent someone else from providing the initial breath sample and to ensure the driver remains sober. The driver has a limited amount of time to provide a sample for a rolling retest.
What Triggers a Violation:
- Failing the initial breath test (BAC above the limit).
- Missing or failing a rolling retest.
- Tampering with or attempting to circumvent the device.
- Any attempt by someone other than the driver to provide a breath sample.
Costs Associated with IIDs
The financial responsibility for IIDs typically falls on the offender.
- Installation Fees
- Monthly Lease/Rental Fees
- Calibration Fees
- Removal Fees
State-Approved Providers
The Ohio market relies on a network of "Authorized Service Partners" (ASPs) certified by SCRAM Systems (Alcohol Monitoring Systems, Inc.). These private entities manage the logistics, installation, and initial data review.
IID Violations and Consequences
Violations of IID requirements can lead to serious consequences:
- Extension of the IID requirement period.
- Suspension of driving privileges.
- Jail time.
Urban Centers (Cleveland, Columbus, Cincinnati) offer immediate IID installations. Providers maintain physical offices near the major courthouses.
When Is an Interlock Required in Ohio?
Ohio requires ignition interlock devices in most OVI cases. Here's a breakdown by offense level.
| Offense Type | IID Required | Duration | Notes |
|---|---|---|---|
| 1st OVI (BAC < 0.17) | 6-12 months | May be required or optional depending on court | |
| 1st OVI (BAC 0.17+) | 12-18 months | Mandatory for high BAC | |
| 2nd OVI | 1-2 years | Always mandatory | |
| 3rd+ OVI | 2-5 years | Extended requirement, possible permanent | |
| Refusal to Test | 12-24 months | Mandatory in most states |
* Durations are typical ranges. Judges may impose longer requirements. Ohio uses a 10-year lookback period for prior offenses.
Ohio Employer Vehicle Exemption
Ohio May Allow Limited Employer Exemptions
Under certain conditions, you may be able to drive an employer-owned vehicle without an interlock. Requirements typically include:
- Written employer consent acknowledging your IID requirement
- Driving only during work hours for work purposes
- No ownership stake in the employer's business
- Carrying documentation at all times while driving
Verify Before Relying on This Exemption
Employer exemptions are being phased out in many states and may have been modified since this page was updated. Verify current Ohio law with the DMV or your attorney before driving any vehicle without an interlock. Violations can result in criminal charges.
Ohio Ignition Interlock Providers
These providers are approved by the state and have installation locations throughout the area. Compare costs and services before choosing.
| Provider | Locations | Coverage | Get Quote |
|---|---|---|---|
| Intoxalock | 4,500+ nationwide | Ohio approved | Compare |
| Smart Start | 2,200+ nationwide | Ohio approved | Compare |
| LifeSafer | 1,700+ nationwide | Ohio approved | Compare |
Links marked with "Compare" may be affiliate links. We may earn a commission at no additional cost to you.
How to Get an Ignition Interlock in Ohio
Follow these steps to get your IID installed and start driving legally.
Get Your Court Order or DMV Notice
After your OVI conviction or administrative suspension, you'll receive documentation specifying your IID requirement duration and any conditions.
- •Keep copies of all court documents
- •Note the exact start and end dates
- •Check if specific providers are required
Choose a State-Approved Provider
Ohio requires you to use a state-certified IID provider. Major providers include Intoxalock, Smart Start, and LifeSafer, all with locations in Ohio.
- •Compare installation locations and hours
- •Ask about monthly costs including calibration
- •Check reviews and customer service reputation
Schedule Installation
Installation typically takes 1-2 hours. Bring your court order, drivers license, vehicle registration, and payment. The technician will wire the device into your vehicle.
- •Ensure vehicle battery is in good condition
- •Some luxury/European vehicles may cost more
- •Ask about loaner devices if yours needs service
Learn to Use the Device
The technician will train you on proper blow technique, rolling retests, and what triggers a violation. Most failures are due to improper technique, not actual alcohol.
- •Don't eat or drink 15 minutes before testing
- •Avoid mouthwash containing alcohol
- •Hum while blowing for better results
Complete Monthly Calibrations
Return to the service center every 30-60 days for calibration. Missing a calibration appointment is a violation that can extend your requirement.
- •Set calendar reminders for appointments
- •Don't wait until the last day—service centers book up
- •Your device will lockout if calibration is overdue
Request Removal When Complete
Once your IID period is complete, get documentation from your provider and the court/DMV. Don't remove the device until you have official authorization.
- •Get removal authorization in writing
- •Keep your final compliance report—you'll need it for license reinstatement
- •Return any rented equipment to avoid fees
Ohio Interlock Costs
Typical Costs
Often included in monthly fee
Charged for failed tests or missed calibrations
Varies by provider and duration
Ways to Reduce IID Costs
- Compare quotes from multiple providers
- Ask about income-based discounts or payment plans
- Avoid violations to prevent extension fees
- Keep calibration appointments to avoid lockout fees
- Check if your attorney can negotiate reduced duration
IID Problems & Troubleshooting
Common issues and how to handle them
Ohio Ignition Interlock FAQ
Sources & Official Resources
Information sourced from Ohio DMV, state statutes, and IID provider documentation. Always verify current requirements with official sources.
Last updated: January 2026
Need Help With Your Ohio OVI Case?
An experienced OVI attorney can help you understand your IID requirements, potentially reduce your interlock period, or address violations.
Disclosure: This page contains affiliate links to IID providers. We may earn a commission if you install through our partners, at no additional cost to you. This helps support our free educational content.