Wyoming DWUI Ignition Interlock Requirements (2026): Who Needs One, SNAP Assistance & Approved Providers
Wyoming calls its offense DWUI (Driving While Under the Influence) and is not an all-offender state — a first DWUI below 0.15% BAC does not require an ignition interlock. The IID is mandatory for first offenses at BAC 0.15%+ and for all second and subsequent DWUI convictions. Wyoming offers a SNAP-based indigent assistance program that pays half of installation and monthly service fees. Here’s how the program works.
DWUI with BAC 0.15%+ or repeat offense? Get a free quote from a WYDOT-approved provider.
Call for a free quote
Wyoming DWUI interlock requirements at a glance
| Offense term | DWUI (Driving While Under the Influence) — W.S. 31-5-233 |
| All-offender? | No — first offense under 0.15% BAC has no IID requirement. IID mandatory for 1st offense at BAC 0.15%+, and for all 2nd and subsequent DWUI regardless of BAC (31-5-233(f)). |
| 1st offense, BAC under 0.15% | No IID required under W.S. 31-5-233(f) |
| 1st offense, BAC 0.15%+ | IID mandatory — 6 months (31-5-233(f)(ii)) |
| 2nd offense (any BAC) | IID mandatory — 1 year |
| 3rd offense (any BAC) | IID mandatory — 2 years |
| 4th+ offense | Lifetime IID restriction. Driver may petition the court for removal at 5 years, and every 5 years thereafter. |
| No early release for compliance | Wyoming does not shorten the IID term for good compliance — the full period must be served. WYDOT verifies eligibility before lifting the restriction. |
| Circumvention | WYDOT: circumvention adds interlock time. Device removed or nonfunctional suspends the interlock license until cured. Conviction under 31-7-404 or 31-5-233 can revoke the interlock license. |
| Lapsed SR-22 | A lapsed SR-22 suspends the interlock license until the SR-22 is reinstated — make sure SR-22 remains active throughout the full IID period |
| Indigent assistance | SNAP-based — pays half of installation cost and half of monthly service fees (receipt-based reimbursement); $100 admin fee waived. Apply via oneWYO or interlock@wyo.gov (W.S. 31-7-401). |
| IID license admin fee | $100 (waived if indigent assistance approved) |
| License reinstatement fee | $50 |
| SR-22 required? | Yes — required for all DWUI convictions and as a condition of the interlock license. 3 years from the date proof is first required (W.S. 31-9-401). |
| Who approves providers | WYDOT Driver Services — WYDOT — Ignition Interlock |
| Governing law | W.S. 31-5-233(f); 31-7-401 to 31-7-404; 31-9-401 |
A lapsed SR-22 suspends your Wyoming interlock license — keep both active simultaneously. Wyoming’s interlock license and SR-22 insurance are linked — a lapse in your SR-22 coverage suspends your interlock license until the SR-22 is reinstated. This means losing driving privileges mid-term through an insurance lapse, not a device violation. Set up SR-22 auto-renewal and confirm your policy is active at each anniversary date throughout the full IID period. See the Wyoming SR-22 page →
Fourth or subsequent DWUI: lifetime IID restriction with 5-year petition intervals. Wyoming’s fourth or subsequent DWUI conviction results in a lifetime ignition interlock restriction. The driver may petition the court for removal at the 5-year mark and every 5 years after that — but removal is not guaranteed. There is no administrative pathway to remove the restriction without a successful court petition. If this applies to your case, consult an attorney before assuming the restriction will be lifted at 5 years.
SNAP-based indigent assistance — half costs, receipt reimbursement
Wyoming’s indigent IID assistance program (W.S. 31-7-401) is tied to SNAP (federal food assistance) eligibility rather than a separate state income test. Key details:
- Eligibility: Demonstrates eligibility for or active participation in federal SNAP
- Benefit: Half of installation cost + half of monthly service fees paid (receipt-based reimbursement); $100 admin fee waived
- How to apply: Via the oneWYO portal or email interlock@wyo.gov
- Reimbursement mechanics: Receipt-based — you pay the provider, then submit receipts to WYDOT for the 50% reimbursement. Keep all receipts.
WYDOT-approved providers
WYDOT’s current approved list includes five providers. Guardian and ALCOLOCK are not on the Wyoming list. Dräger appeared on an older (2018) WYDOT brochure but is absent from the current page — RoadGuard (Dräger’s interlock brand) is listed separately.
| 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 |
| RoadGuard (Dräger) | $65–95 | Statewide | 833-545-0368 |
| Low Cost Interlock | $55–80 | Statewide | Contact via WYDOT list |
Confirm current WYDOT approval at dot.state.wy.us before signing. Guardian and ALCOLOCK are not on the Wyoming list. If applying for SNAP-based indigent assistance, apply before installation and keep all payment receipts for reimbursement.
What an interlock costs in Wyoming
| Installation (one time) | $70–150 (50% reimbursed for qualifying SNAP recipients) |
| Monthly service fee | $55–100 (50% reimbursed for qualifying SNAP recipients) |
| Removal | $50–75 |
| WYDOT IID license admin fee | $100 (waived for approved indigent assistance recipients) |
| License reinstatement fee | $50 |
Over a 6-month first-offense term (BAC 0.15%+): roughly $600–900 before fees; potentially $350–500 with SNAP-based assistance. Wyoming’s no-early-release policy means the full period is always served. Estimate your exact cost →
How to get installed — 5 steps
- Confirm whether an IID is required: BAC under 0.15% on a first DWUI = no IID. BAC 0.15%+ on a first, or any second or subsequent DWUI = IID mandatory. If you qualify for SNAP-based assistance, apply to WYDOT via oneWYO or interlock@wyo.gov before contacting a provider.
- Obtain SR-22 insurance immediately — SR-22 is required as a condition of the interlock license and a lapsed SR-22 suspends the license. Have SR-22 in place before applying for the interlock restricted license.
- Contact a WYDOT-approved provider from the current list, confirm approval, and schedule installation. Pay the $100 admin fee (waived if indigent assistance approved) and $50 reinstatement fee to WYDOT.
- Drive with complete compliance for the full required period. Wyoming does not reduce the IID term for good compliance — the full 6 months / 1 year / 2 years must be served. Circumvention adds interlock time. Keep SR-22 continuously active.
- After the full period, WYDOT verifies eligibility and lifts the restriction. Do not remove the device before WYDOT confirms the restriction has been lifted.
Full term must be served — no early release. Start clean, keep SR-22 active, and book installation today.
Book installation
Wyoming requires SR-22 for all DWUI convictions — 3 years from when proof is first required. A lapsed SR-22 suspends the interlock license. See Wyoming SR-22 costs and cheapest carriers →
Wyoming DWUI interlock FAQ
Does every Wyoming DWUI conviction require an interlock?
No — a first DWUI with BAC under 0.15% does not require an IID under W.S. 31-5-233(f). IID is mandatory for a first DWUI with BAC 0.15%+, and for all second and subsequent DWUI convictions regardless of BAC. If your first offense was under 0.15%, you are not required to install an IID.
What happens if my SR-22 lapses during the Wyoming IID period?
A lapsed SR-22 immediately suspends your Wyoming interlock license until the SR-22 is reinstated. You lose driving privileges through an insurance lapse — separate from any device violation. Set up SR-22 autopay and confirm your policy is active at each anniversary date throughout the entire IID term. A lapse can add time to your effective restriction period.
How does Wyoming’s SNAP-based indigent assistance work?
Under W.S. 31-7-401, drivers who demonstrate eligibility for or active participation in federal SNAP receive 50% reimbursement of installation costs and 50% reimbursement of monthly service fees. The $100 admin fee is also waived. Apply through the oneWYO portal or email interlock@wyo.gov before installation. The reimbursement is receipt-based — pay the provider first, then submit receipts to WYDOT. Keep all payment documentation.
Can Wyoming reduce my IID term if I comply perfectly?
No — Wyoming does not offer any reduction for good compliance. The full IID term (6 months for 1st offense at 0.15%+; 1 year for 2nd; 2 years for 3rd; lifetime for 4th+) must be served. WYDOT verifies eligibility before lifting the restriction — there is no early release pathway regardless of compliance record.
What are Wyoming’s 4th-offense rules?
A fourth or subsequent DWUI conviction results in a lifetime ignition interlock restriction. The driver may petition the court for removal at the 5-year mark and then every 5 years after that. Court approval is required — the restriction does not automatically end. Consult an attorney if this applies to your case.
Sources:
WYDOT — Ignition Interlock;
W.S. 31-5-233(f); 31-7-401 to 31-7-404; 31-9-401.
Last verified August 2026.
Advertising disclosure: We may be compensated when you contact a provider through our numbers or links. Content is informational only — not legal advice. Verify WYDOT approval before installation. Low Cost Interlock contact information not listed — obtain from WYDOT’s approved list.