Montana treats a second DUI within five years as an aggravated offense with a mandatory 7-day jail minimum, 1-year license revocation, and 3-year SR-22 filing requirement—plus ignition interlock on every vehicle you own.
What Happens to Your License After a Second DUI in Montana
Montana revokes your driver's license for 1 year after a second DUI conviction within five years, measured from arrest date to arrest date. The revocation is mandatory—there are no exceptions, and you cannot apply for any type of restricted or probationary license during the first 45 days. After that 45-day hard suspension, you can apply for a probationary license, but only if you install an ignition interlock device on every vehicle you own or regularly operate.
The conviction itself carries a mandatory minimum 7-day jail sentence (or 10 days if your BAC was .16 or higher), a fine between $1,200 and $2,000, and enrollment in a court-approved chemical dependency treatment program. These penalties stack—you serve jail time, pay the fine, complete treatment, and manage the license revocation simultaneously.
Your SR-22 filing requirement begins on the day your license is reinstated, not on the day of conviction or revocation. If you wait the full year before reinstating, your 3-year SR-22 clock doesn't start until month 13. This timing catches most second-offense drivers off guard—they assume the SR-22 period runs concurrently with the revocation, but Montana law treats them as sequential compliance obligations.
How the Probationary License and Ignition Interlock Work
After the initial 45-day hard suspension, you can apply for a probationary license through Montana's Motor Vehicle Division. Approval requires proof of ignition interlock installation on every vehicle registered to you or that you operate regularly, proof of SR-22 insurance filing, completion of a chemical dependency assessment, and payment of a $200 reinstatement fee. The ignition interlock must stay installed for the full 1-year revocation period—removing it early or attempting to bypass it triggers a new violation and extends your revocation.
The probationary license allows you to drive anywhere, anytime—it's not restricted to work or medical appointments like some states' hardship licenses. The only restriction is the interlock itself. You'll pay $75–$100 per month for the device lease, plus a $150–$200 installation fee and monthly calibration appointments every 30–60 days at $50–$75 each. Montana requires interlock providers to report all violations (failed starts, missed calibrations, tampering) directly to the MVD.
If you don't own a vehicle or don't plan to drive during the revocation period, you can skip the probationary license and wait out the full year. You'll still need SR-22 insurance to reinstate at the end, even if you're filing as a non-owner.
Find out exactly how long SR-22 is required in your state
What SR-22 Insurance Costs After a Second DUI in Montana
Montana requires SR-22 filing for 3 years after license reinstatement following a second DUI. Your insurance rates will reflect both the DUI conviction and the SR-22 requirement. Second-offense DUI drivers in Montana typically pay $180–$320 per month for minimum liability coverage with SR-22, compared to $85–$120 per month for a clean-record driver. The increase comes from two sources: the DUI conviction itself, which signals high risk to carriers, and the restricted carrier pool willing to write second-offense policies.
Most major carriers—State Farm, Geico, Allstate, Progressive—will not write new policies for drivers with two DUIs within five years. If you were already insured with one of these carriers before your second conviction, they may file SR-22 for you temporarily but will almost certainly non-renew your policy at term. Montana's non-standard market includes Bristol West, Dairyland, The General, GAINSCO, and Direct Auto. Availability varies by county, and not all non-standard carriers operate statewide.
The SR-22 filing itself costs $25–$50 as a one-time fee, processed by your carrier and sent electronically to the Montana MVD. Your carrier will charge you separately for the policy premium, which is billed monthly or in 6-month terms. If your policy lapses or cancels for any reason during the 3-year filing period, your carrier notifies the MVD within 24 hours, and your license is suspended immediately. Reinstatement after a lapse requires a new SR-22 filing and payment of a $200 reinstatement fee, and your 3-year clock resets to day one.
Timeline From Conviction to Full Reinstatement
Montana's second-offense DUI compliance timeline runs longer than most drivers expect because the license revocation and SR-22 filing periods do not overlap. Here's the actual sequence:
Day 1–45: Hard suspension. No driving privileges available. You can begin gathering documents for probationary license application during this window.
Day 46–365: Probationary license period. You can drive if you've installed an interlock, filed SR-22, completed your chemical dependency assessment, and paid the reinstatement fee. The interlock stays on your vehicle for this full period.
Day 366: Full license reinstatement eligibility. You apply for reinstatement, prove your SR-22 is still active, confirm interlock compliance, and pay any outstanding fees. Your 3-year SR-22 filing requirement begins on the day MVD processes your reinstatement.
Year 4, Day 366: SR-22 filing period ends. You contact your carrier to remove the SR-22 from your policy. Your rates drop, though you'll still carry the second DUI on your record for insurance pricing purposes until the 5-year mark.
Most second-offense drivers in Montana are looking at 4 years and 1 month from conviction to full clearance of all license and filing requirements, assuming no lapses or violations during that period.
What Court Compliance Looks Like Alongside the SR-22 Requirement
Montana second-offense DUI sentences include mandatory chemical dependency treatment, which typically consists of 40–60 hours of outpatient programming over 12–16 weeks. You'll be assigned a treatment provider by the court, and completion is required before your probationary license will be issued. Treatment costs $1,200–$2,500 depending on county and provider, and most programs require weekly attendance with random urinalysis testing.
You'll also serve probation for 1–2 years, with monthly check-ins, ongoing sobriety monitoring, and compliance verification. Your probation officer will receive reports from your interlock provider and your insurance carrier—any violations, missed calibrations, or insurance lapses are reported directly to the court and can result in probation revocation and additional jail time.
If you're convicted of any alcohol-related offense during your SR-22 filing period—DUI, open container, public intoxication—Montana treats it as a probation violation and a separate license action. Your probationary license is revoked immediately, your SR-22 clock resets, and you face felony DUI charges if the new offense is also a DUI. The stacking is severe: second-offense drivers have almost no margin for error during the 4+ year compliance window.
How to Get SR-22 Insurance in Montana With Two DUIs
Start by contacting non-standard carriers directly. Bristol West, Dairyland, and The General all operate in Montana and write policies for second-offense DUI drivers, though coverage availability depends on your county and whether you own a vehicle. If you're applying for a probationary license and need owned-vehicle coverage, expect quotes in the $180–$320/month range for minimum liability limits.
If you don't own a vehicle but need SR-22 to reinstate your license, ask for a non-owner SR-22 policy. These policies provide liability coverage when you're driving a borrowed or rented vehicle and typically cost $40–$80 per month. Montana accepts non-owner SR-22 filings for reinstatement purposes, and they satisfy the 3-year filing requirement exactly like a standard policy.
Once you're approved for coverage, your carrier files the SR-22 electronically with the Montana MVD within 24–48 hours. You'll receive a copy of the filing form by email or mail—bring this to your MVD reinstatement appointment along with proof of interlock installation, proof of treatment completion, and payment for the $200 reinstatement fee. The MVD processes reinstatements within 5–7 business days if all documents are complete.
Estimates based on available industry data; individual rates vary by driving history, vehicle, coverage selections, and county.