Massachusetts Ignition Interlock Requirements (2026): Costs & Approved Providers
Massachusetts does not require an interlock for every OUI — but if you’re a repeat offender or a first offender with a breath test of .15% or higher seeking a hardship license, Melanie’s Law mandates a minimum of 2 years post-reinstatement. The RMV’s indigency program can make the device completely free. Here’s who needs one, how long it lasts, and what the violation stakes are.
Required under Melanie’s Law? Get a free quote from a Massachusetts RMV-approved provider.
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Massachusetts OUI interlock requirements at a glance
| Offense term | OUI (Operating Under the Influence) — Massachusetts’s term for impaired driving |
| All-offender? | No — applies to repeat offenders (2nd OUI or more) and first offenders with a breath test of .15%+ who seek a hardship license (M.G.L. c.90 §24.5; §24D) |
| Standard first offense | No IID required unless court-ordered; standard 24D disposition does not trigger the RMV IID program |
| First offense — breath test .15%+ seeking hardship license | IID required for the duration of the hardship license period (eff. 7/1/2021, St.2020 c.227) |
| Second or subsequent offense — IID term | Minimum 2 years (730 compliant days) of IID after full license reinstatement (Melanie’s Law, c.90 §24.5) |
| Hardship license then reinstatement | IID runs the full hardship period PLUS 2 additional years after full reinstatement |
| Does term scale by offense count? | No — Massachusetts sets the same 2-year post-reinstatement minimum regardless of 2nd, 3rd, or 4th+ offense |
| Removal requirement | Full term served + NO violations in the prior 6 consecutive months + RMV Hearings Officer approval + replacement license issued + provider removes device |
| Indigency program | Device, installation, monitoring, and service at no cost; $30/month RMV program fee also waived on hardship determination |
| Indigency eligibility | MassHealth/EBT enrollment; OR court document (within 12 months) showing appointed counsel or verified indigency; OR after-tax income ≤ 125% FPL |
| RMV IID program fee | $30/month (collected by vendor; waived under indigency program) |
| License restriction | “T” restriction added to license; removed by RMV Hearings Officer after successful completion |
| Who administers | Massachusetts RMV — IID Program |
| Governing law | M.G.L. c.90 §24; §24.5 (Melanie’s Law); §24D; 540 CMR 25.00 |
Who needs an interlock in Massachusetts?
Massachusetts is not an all-offender state. Whether you need an IID depends on your offense count and BAC:
- Standard first OUI (BAC under .15%): No RMV IID requirement. A court may still order one as a condition of probation, which RMV will honor, but the RMV program is not automatically triggered.
- First OUI with breath test .15%+ seeking a hardship license: IID required for the entire hardship license period (since July 1, 2021). If you don’t seek a hardship license, no RMV IID requirement for a first offense at this BAC.
- Second or subsequent OUI: IID mandatory for a minimum of 2 years (730 compliant days) after full license reinstatement under Melanie’s Law (c.90 §24.5). If you used a hardship license during your suspension, the 2-year IID term begins after full reinstatement — so the hardship IID period does not count toward the 2 years.
Melanie’s Law: 2 years minimum, always after reinstatement. Under M.G.L. c.90 §24.5, second and subsequent OUI offenders must complete a minimum of 730 compliant days (2 years) on the IID after their license is fully reinstated. This term does not scale upward for third or fourth offenses — it’s the same 2-year floor. But if you had a hardship license, your IID term on the hardship period does not count toward the 2 years. You must serve the hardship IID period and then an additional 2 years post-reinstatement.
Qualifying? Massachusetts makes the device completely free. The RMV Indigency Program covers the device, installation, monitoring, and service at no cost. The $30/month RMV program fee is also waived on a hardship determination. Eligibility: MassHealth or EBT enrollment, OR a court document within the past 12 months showing appointed counsel or verified indigency, OR after-tax income at or below 125% of the Federal Poverty Line. Apply through the RMV when you enroll in the IID program. Note: violation costs and RMV fees are not covered.
Massachusetts RMV-approved providers
Four to five major providers appear on Massachusetts’s approved list. ALCOLOCK is not listed. Note on Dräger: Dräger appears in the RMV program document but not all current town-by-town service listings — confirm availability in your area before booking.
| Provider | Monthly est. | Coverage | |
|---|---|---|---|
| Intoxalock | $60–100 | Statewide | 888-283-5899 |
| Smart Start | $70–100 | Statewide | 800-831-3299 |
| LifeSafer | $65–95 | Statewide | 800-634-3077 |
| Guardian Interlock | $65–95 | Statewide | 800-499-0994 |
| RoadGuard (Dräger) | $65–95 | Confirm availability | 833-545-0368 |
Confirm current RMV approval and service availability at mass.gov/guides/ignition-interlock-device-program. ALCOLOCK is not on the Massachusetts approved list. Dräger appears in the RMV program document but confirm service availability in your town before booking. If indigency-eligible, notify RMV before installation — the no-cost program must be established first.
What an interlock costs in Massachusetts
| Installation (one time) | $70–150 (free with indigency program) |
| Monthly device rental + monitoring | $60–100 (free with indigency program) |
| RMV IID program fee | $30/month (waived with indigency program) |
| Removal | $50–75 (free with indigency program) |
| $25 duplicate license (to drop “T” restriction) | $25 |
Over a 2-year (730-day) Melanie’s Law term, expect roughly $2,000–3,000 in device and RMV fees without the indigency program — or $0 in device costs if you qualify. Estimate your exact cost →
How to enroll — 5 steps
- After your OUI disposition, contact the Massachusetts RMV to confirm your IID requirement and apply for enrollment. Determine if you qualify for the indigency program before contacting providers.
- If indigency-eligible, provide documentation (MassHealth/EBT card, court document within 12 months, or income verification at ≤ 125% FPL) to RMV. Establish the no-cost program before installation.
- Contact an RMV-approved provider, confirm their approval status and town coverage, and schedule installation. Bring your RMV enrollment paperwork.
- Serve the full IID term — 2 years (730 compliant days) post-reinstatement under Melanie’s Law. Keep every calibration appointment. The final 6 months must be completely violation-free.
- After 6 clean months: apply to an RMV Hearings Officer for removal authorization. Once approved, get a replacement license without the “T” restriction, then schedule device removal with your provider.
Income-eligible? The device could be free. Call a provider — they can help you navigate the indigency program before booking.
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Violations — among the most severe in the country
Massachusetts’s violation consequences are exceptionally severe. Any violation in the final 6 months restarts the 6-month clean window — meaning one incident near the end of your 2-year term can add another 6 months of wait time before you can even apply for removal.
Beyond the window reset, Massachusetts imposes some of the harshest penalties for serious violations in the country:
- Hardship license violations can mean revocation for the balance of the hardship period plus an additional 10 years.
- Two failed rolling retests (BrAC readings during driving) can trigger lifetime revocation under Massachusetts law.
These penalties are not hypothetical — Massachusetts enforces them. Treat every calibration appointment, every rolling retest, and every device interaction as consequential. Contact your attorney immediately if any violation occurs.
Massachusetts does not use SR-22 filings. Massachusetts runs a compulsory-insurance system verified through the RMV/registration process — no SR-22 certificate is required. See our Massachusetts insurance page → for details on what you do need.
Massachusetts OUI interlock FAQ
Does every OUI in Massachusetts require an interlock?
No. A standard first OUI does not trigger the RMV IID program unless the court orders one. The interlock is required if: (1) it’s your second or subsequent OUI, or (2) it’s a first OUI with a breath test of .15%+ and you’re seeking a hardship license. In both cases the RMV administers the requirement under Melanie’s Law (c.90 §24.5) or the 2021 amendment to §24D.
How long is the interlock requirement in Massachusetts?
For second and subsequent OUI offenders: a minimum of 2 years (730 compliant days) after full license reinstatement, regardless of offense count. If you had a hardship license first, the IID term during that period does not count toward the 2 years — the 2-year clock starts at full reinstatement. For .15%+ first offenders on a hardship license: the IID runs only for the hardship license period, with no added 2-year post-reinstatement requirement.
Can I get the interlock at no cost in Massachusetts?
Yes — the RMV Indigency Program covers the device, installation, monitoring, and service at no cost, and waives the $30/month RMV program fee. Eligibility: MassHealth or EBT enrollment, a court document within 12 months showing appointed counsel or indigency, or after-tax income at or below 125% FPL. Establish this before installation — the no-cost program must be set up first. Violation costs and RMV fees are not covered.
How does the 6-month clean window work?
To apply for removal, you need no violations at all in the 6 consecutive months immediately before your application to the RMV Hearings Officer. Any violation in that 6-month window — including a single failed startup or missed retest — restarts the 6-month clock from zero. Plan to be especially compliant during the final months of your 2-year term.
What are the most serious violation consequences in Massachusetts?
Violations while on a hardship license can result in revocation for the balance of the hardship period plus 10 additional years. Two failed rolling retests (BrAC readings while driving) can trigger lifetime revocation. These are among the harshest IID violation penalties of any state. Contact your attorney immediately if any violation occurs.
Sources:
Massachusetts RMV — IID Program;
M.G.L. c.90 §24; §24.5 (Melanie’s Law); §24D; 540 CMR 25.00.
Last verified August 2026.
Advertising disclosure: We may be compensated when you contact a provider through our numbers or links. This doesn’t affect our rankings or information. Content is informational only — not legal advice. Verify requirements with your attorney or Massachusetts RMV.