Iowa window tint laws
One of the strictest front-side rules in the country — only 0 of 51 jurisdictions require more light.
The legal limits
Will your film pass in Iowa?
A trooper's meter reads the film and the glass. Factory glass runs about 78% VLT, so net VLT = film × glass — which is why "35% film" can fail a 35% state. Common shades over factory glass:
| Film | Meters at | Front side | Back side | Rear |
|---|---|---|---|---|
| 70% | 54.6% VLT | Fail | Pass | Pass |
| 50% | 39.0% VLT | Fail | Pass | Pass |
| 35% | 27.3% VLT | Fail | Pass | Pass |
| 20% | 15.6% VLT | Fail | Pass | Pass |
| 5% | 3.9% VLT | Fail | Pass | Pass |
Different glass or an odd shade? Run the exact numbers in the tint-law tool — it also emails you if Iowa's law changes.
Across the state line
Shops near a border tint cars registered in both states. Iowa front side: 70% VLT min — the neighbors:
Iowa tint law FAQs
What is the darkest legal tint in Iowa?
Iowa sets no VLT floor on back-side or rear windows, so film there can be as dark as you like. Front side windows must still meter at least 70% VLT.
Is 20% tint legal in Iowa?
A 20% film over factory glass meters about 15.6% VLT. That fails Iowa's 70% front-side rule and it is legal on the back-side and rear windows.
Does Iowa allow medical exemptions for darker tint?
Yes — Iowa allows darker film with a qualifying medical exemption. Keep the exemption paperwork in the vehicle.
Is reflective or mirrored tint legal in Iowa?
No — Iowa does not allow reflective or mirrored window film.
What is the windshield tint rule in Iowa?
Iowa allows windshield tint only at the top of the glass: Top 5". Full-windshield film (outside a medical exemption) fails inspection.
Reviewed against state DOT/DPS regulations as of 2025. States amend tint law — verify with the Iowa authority before installing. This is reference material, not legal advice.
Run a tint shop in Iowa?
Wraptor quotes tint, wrap, and PPF jobs with the legal limits built in — plus scheduling, deposits, and a CRM that remembers every VIN.