Vehicle Law · Window Tint
Window Tint Laws in Iowa
The exact legal darkness allowed on every window of your vehicle in Iowa, plus reflection limits, the medical exemption, and what a ticket costs.
How dark you can legally go
Visible-light transmission (VLT) allowed for each window.
Common tint shades, and whether they're legal here
What the shop sells, mapped to the Iowa limit.
| Film shade | Front side | Back & rear |
|---|---|---|
| 70% (light) | Legal | Conditional |
| 50% | Too dark | Conditional |
| 35% (factory look) | Too dark | Conditional |
| 20% | Too dark | Conditional |
| 5% (limo) | Too dark | Conditional |
Iowa regulates only the front glass. The 70% standard in rule 761-450.7 reaches the windshield, the front side windows, and the front sidewings; the back side windows and rear window carry no VLT limit.
Film is sold by its own VLT, but police measure the installed darkness: the film combined with your factory glass. Ask the shop for the net, as-installed VLT before you buy.
The full rules, with the statute
Every limit and where it comes from in the code.
| Rule / window | Legal limit in Iowa | Statute |
|---|---|---|
| Windshield | The front windshield must meet the same 70% transparency standard as the front side glass. | Iowa Admin. Code r. 761-450.… |
| Front side | At least 70% light transmittance. | §321.438(2) |
| Back side | Any darkness (no minimum). | §321.438(2); Iowa Admin. Cod… |
| Rear window | Any darkness (no minimum). | §321.438(2); Iowa Admin. Cod… |
| SUV / van rear | No separate SUV or van rule is needed; every window behind the driver is already unregulated for darkness | Iowa Admin. Code r. 761-450.… |
| Reflection | Front glass may not be "excessively dark or reflective." The rule defines that phrase through the 70% transparency floor and states no separate reflectance percentage. | §321.438(2); Iowa Admin. Cod… |
| Banned colors | Not specified in statute or rule; neither §321.438 nor rule 761-450.7 names a banned color | §321.438; Iowa Admin. Code r… |
| Medical exemption | NoneNo medical exemption exists in this state. | Iowa Admin. Code r. 761-450.… |
| Meter tolerance | Not specified; the rule sets a flat 70% floor with no stated meter tolerance | Iowa Admin. Code r. 761-450.… |
Penalties & how it's enforced
What happens if your tint is too dark.
ARC 6219C (effective 2022-04-13): No new tint standard in 2025 or 2026. The last substantive rule action was ARC 6219C (effective April 13, 2022), which left the 70% front-glass standard in place. New medical exemptions have been unavailable since July 4, 2012.
Medical exemption: none in this state
What the statute actually provides.
What Iowa drivers get wrong
Iowa is a front-glass state and nothing more. The Iowa Code section drivers usually cite, §321.438, never states a percentage; it just bans front glass that is "excessively dark or reflective" and hands the number to the transportation department. The rule, 761-450.7, sets that number at 70% for the windshield and front side windows. Behind the driver there is no limit at all, and the old medical exemption has been closed to new applicants since 2012.
Common questions
What is the legal tint in Iowa?
The windshield and front side windows must allow at least 70% of light. That figure comes from administrative rule 761-450.7, not from Iowa Code §321.438, which only bans front glass that is excessively dark or reflective and leaves the exact number to the department.
Can I tint my back and rear windows in Iowa?
Yes. Iowa only regulates the front windshield, front side windows, and front sidewings. The side windows behind the driver and the rear window carry no light-transmittance limit, so any darkness is allowed there.
Can I still get a medical tint exemption in Iowa?
No new ones. Iowa stopped granting medical tint exemptions on July 4, 2012. Only vehicles already documented on Form 432020 before that date, still carrying the same person, may keep front glass down to 35%, and that exemption cannot be renewed.
Not legal advicePlainStatute provides plain-language summaries of public law for general information only. This is not legal advice. Statutes change; always confirm current requirements with the official source linked above before acting.