What's the Passing Score on the Iowa Permit Test?
You need 28 of 35 questions correct — 80% — to pass Iowa's instruction permit knowledge test.
Twenty-eight right, seven to spare
Twenty-eight correct out of thirty-five clears the bar, leaving seven questions you can afford to miss without failing.
That's a reasonable cushion, but guessing through an entire topic — say, right-of-way rules — can burn through it faster than expected.
A score worth beating, not just meeting
80% is the minimum required, not a target to aim for. Real testing conditions tend to run a few points below whatever you're hitting in relaxed practice at home.
Checking your score by topic after each practice set catches a weak spot that an overall percentage alone would hide.
What tends to trip people up
Iowa's passenger restriction is opt-in for the parent, not automatic like most states' — mixing that up with a flat mandatory rule is a common mistake.
Read the explanation on every practice question, correct or not — it's what actually closes these gaps, not just re-answering until you get lucky.
Frequently Asked Questions
What's the passing score on Iowa's permit test?
28 of 35 questions correct — 80%.
How many questions can I miss and still pass?
At most 7 of the 35 questions, keeping you at 28 correct (80%).
Does Iowa's passenger restriction apply to every teen driver automatically?
No — a parent or guardian can waive it entirely when the intermediate license is issued.
Ready to put this into practice?
Start a free Iowa permit practice testLast reviewed: 2026-07-22