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Montana Window Tint Laws (2026)

Info: Front side windows must let at least 24% of light through; the windshield must stay clear below the AS-1 line — the marking near the top of the windshield.

InfoVerified Jun 18, 2026
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Front side windows must let at least 24% of light through; the windshield must stay clear below the AS-1 line — the marking near the top of the windshield. (Mont. Code Ann. 61-9-405)

Official source: mca.legmt.gov →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Window Tint in states bordering Montana

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

  • IdahoInfo

    Front side windows must let at least 35% of light through; the windshield can't be tinted below the AS-1 line — the marking near the top — or below 6 inches from the top if there is no AS-1 line. (Idaho Code 49-944)

    Verified Jun 18, 2026 · Source: legislature.idaho.gov · Full Idaho rule →

  • North DakotaInfo

    Front side windows must let at least 50% of light through; the windshield must let at least 70% through, with non-reflective tint allowed above the AS-1 line — the marking near the top — or across the top 5 inches. (N.D. Cent. Code 39-21-39)

    Verified Jun 18, 2026 · Source: ndlegis.gov · Full North Dakota rule →

  • South DakotaInfo

    Front side windows must let at least 35% of light through, with a 9% tolerance allowed; windshield tint is allowed only above the AS-1 line — the marking near the top of the windshield. (S.D. Codified Laws 32-15-2.4)

    Verified Jun 18, 2026 · Source: sdlegislature.gov · Full South Dakota rule →

  • WyomingInfo

    Front side windows must let at least 28% of light through in total, and the tint must be non-reflective; windshield tint is limited to the top 5 inches, above the AS-1 line — the marking near the top. (Wyo. Stat. 31-5-962)

    Verified Jun 18, 2026 · Source: wyoleg.gov · Full Wyoming rule →

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