IA · tint law reference

Iowa window tint laws

Last verified September 14, 2026 · Iowa Code § 321.438 as amended by 2026 Iowa Acts ch. 1100 (House File 766), effective July 1, 2026; implementing rule Iowa Admin. Code r. 761—450.7

Legal tint limits at a glance

VLT is the share of light the window must let through — a lower number is darker film, and the reading includes the factory glass.

Iowa window tint limits by window and vehicle type
Window Sedans SUVs, vans & trucks
Windshield Must meet a minimum standard of transparency of at least 70% light transmittance (Iowa Code § 321.438(2)(a)(1)). Separately, § 321.438(1) bars driving a vehicle equipped with a windshield, side wings, or side or rear windows that do not permit clear vision. Same as sedan — § 321.438 draws no distinction by vehicle type
Front side 50% VLT or lighter 50% VLT or lighter
Back side No VLT limit No VLT limit
Rear No VLT limit No VLT limit

Dual side mirrors required if the rear is tinted? Not stated in the sources we checked.

Is my tint legal here?

Film darkness and glass darkness multiply. Enter the film you are considering and the VLT of the bare glass to get the number a meter would read.

70 for tinted OEM glass, 80 for clear

Net VLT 14% 20% film × 70% glass

    Pass/fail compares net VLT against the limits on this page only. Some states apply a measurement tolerance — see Measurement tolerance below — and none of this replaces a meter reading on your own glass.

    The rest of the rule

    Reflectivity

    No numeric limit. § 321.438(2)(a)(2) reaches a front side window or forward sidewing that is "excessively dark or reflective so that it is difficult for a person outside the motor vehicle to see into the motor vehicle," and Iowa Admin. Code r. 761—450.7(2) defines "excessively dark or reflective" only by the transparency minimum, supplying no separate reflectance percentage.

    Colors

    None — neither Iowa Code § 321.438 nor Iowa Admin. Code r. 761—450.7 restricts tint color. windowtintlaws.us reports a red/amber/yellow and metallic/mirrored ban; neither is in the Iowa text.

    Medical exemption

    No — Iowa Admin. Code r. 761—450.7(3)(a): "Effective July 4, 2012, no exemption shall be granted from the minimum standard of transparency set forth in subrule 450.7(2)." Only a closed grandfathered class survives: a vehicle fitted before July 4, 2012 with a front windshield, front side window or front sidewing at less than 70% but not less than 35% light transmittance may keep it so long as the vehicle is still used to transport the operator or passenger who obtained Form 432020 documenting medical need, signed by the person's physician before July 4, 2012; the form must be carried in the vehicle at all times, the exemption expires when that use ends and may not be renewed, and the owner must return the vehicle to compliance within 60 days of expiry. "Physician" means a person licensed under Iowa Code ch. 148, 151 or 154. windowtintlaws.us and the prior record both wrongly report an available medical exemption.

    Stickers & certification

    Not required — neither § 321.438 nor r. 761—450.7 contains any labeling or certification provision.

    Measurement tolerance

    This state does not state a measurement tolerance in the sources we checked.

    Penalties

    Scheduled violation — the fine for a § 321.438(2) violation is set by Iowa Code § 805.8A(2). The exact dollar amount could not be confirmed from official text in this pass (a secondary search result reports $50; the prior record's $70 is unsupported), so treat the amount as unverified. § 321.438(2)(b) exempts a person operating a motor vehicle owned or leased by a federal, state or local law enforcement agency when the operation is part of the person's official duties.

    Notes

    House File 766 (2026 Iowa Acts ch. 1100) rewrote § 321.438(2) and is now in force: the Iowa Legislature's bill history shows "Status: Signed by Governor," passed House 2025-03-25 (72-25) and Senate 2026-03-23 (31-16), signed 2026-05-15, "Effective date: 07/01/2026." Before HF 766 the Code carried no percentage at all and the DOT rule supplied a single 70% figure for the windshield, front side windows and forward sidewings alike; HF 766 moved the numbers into the statute and split them — 70% for the front windshield, 50% for a side window immediately right or left of the driver or a sidewing forward of the driver. Nothing in § 321.438(2) reaches side windows behind the driver or the rear window, so any darkness is permitted there (§ 321.438(1)'s clear-vision requirement still applies in general terms). Note a live conflict: Iowa Admin. Code r. 761—450.7 still states the 70% figure for front side windows and sidewings and has not been conformed to HF 766; the statute controls. Both secondary summaries still publish the pre-HF-766 70% front-side figure.

    Iowa tint questions

    What is the darkest legal tint in Iowa?

    For a sedan in Iowa, front side windows must let at least 50% of light through, no number is stated for the back side windows, and none for the rear window. Lower VLT means darker glass, so those percentages are floors, not targets, and the meter reads the film and the factory glass together.

    Is 20% tint legal in Iowa?

    No, not on the front side windows. Iowa requires at least 50% VLT there and 20% is darker than that, before you even account for the factory glass, which makes the reading darker still. Behind the driver the statute states no VLT number, so 20% may be allowed on the back side and rear windows — read the notes on this page and confirm with the DMV.

    Can I tint the windshield in Iowa?

    Iowa's rule for the windshield: Must meet a minimum standard of transparency of at least 70% light transmittance (Iowa Code § 321.438(2)(a)(1)). Separately, § 321.438(1) bars driving a vehicle equipped with a windshield, side wings, or side or rear windows that do not permit clear vision.

    Does Iowa allow a medical exemption for darker tint?

    What the source says: No — Iowa Admin. Code r. 761—450.7(3)(a): "Effective July 4, 2012, no exemption shall be granted from the minimum standard of transparency set forth in subrule 450.7(2)." Only a closed grandfathered class survives: a vehicle fitted before July 4, 2012 with a front windshield, front side window or front sidewing at less than 70% but not less than 35% light transmittance may keep it so long as the vehicle is still used to transport the operator or passenger who obtained Form 432020 documenting medical need, signed by the person's physician before July 4, 2012; the form must be carried in the vehicle at all times, the exemption expires when that use ends and may not be renewed, and the owner must return the vehicle to compliance within 60 days of expiry. "Physician" means a person licensed under Iowa Code ch. 148, 151 or 154. windowtintlaws.us and the prior record both wrongly report an available medical exemption. Confirm the current process with the agency named before you have film installed.

    Do I need a tint sticker or certificate in Iowa?

    Not required — neither § 321.438 nor r. 761—450.7 contains any labeling or certification provision.

    Nearby states

    Where this comes from

    Statute cited: Iowa Code § 321.438 as amended by 2026 Iowa Acts ch. 1100 (House File 766), effective July 1, 2026; implementing rule Iowa Admin. Code r. 761—450.7

    Checked against the state's own statute or DMV page on September 14, 2026. Laws change; if you find a newer rule, email admin@getpeelboard.com.

    Legal disclaimer: general information, not legal advice; verify with your DMV.

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