The Iowa permit test is the knowledge test given by the Iowa Department of Transportation (Iowa DOT), which is why Iowans call it the DOT permit test, and you need 80% or higher to pass. Iowa DOT does not publish how many questions are on the real test. Its official practice test has 25 questions, and teens can take the real test at home with a parent as proctor.
Iowa permit test at a glance
| Detail | What to know |
|---|---|
| Agency | Iowa Department of Transportation (Iowa DOT), Motor Vehicle Division, plus county treasurer offices |
| Questions | Not published for the real test. Iowa DOT's practice test has 25, and third-party sites say the real test does too (unofficial) |
| Pass mark | 80% or higher |
| Minimum age | 14 for an instruction permit |
| Where | Iowa DOT driver's license station or county treasurer office, at home with a parent, or at a participating school |
| Online test | Yes, at home for teens, proctored by a parent |
| Permit fee | $6.00 (Buchanan County Treasurer figure, confirm with your office) |
| Appointments | Needed for in-person testing and for permit issuance |
How many questions are on the Iowa permit test?
Iowa DOT does not state the number of questions on the real permit test. Its official practice test generates 25 questions drawn from a pool that includes questions from the real knowledge test, and Iowa DOT says a passing score is 80% or higher. If the real test is also 25 questions, as practice sites say, you could miss up to 5.
Use the official practice test as your benchmark. If you can pass it several times in a row with fresh questions each time, you are close.
What's on the Iowa permit test
Questions come from the Iowa Driver's Manual. Expect road signs plus the rules below:
- School buses: stop at least 15 feet from the rear of a bus with flashing lights and an extended stop arm. Violations can mean a suspension of up to 180 days.
- Alcohol: 0.08 for drivers 21 and older and 0.02 for drivers under 21.
- Parking: stay 5 feet from a fire hydrant, 10 feet from a stop sign and 20 feet from a fire station entrance.
- Move Over or Slow Down: covers tow, maintenance, construction and solid waste vehicles with flashing lights.
- Phones: Iowa's hands-free law means you cannot hold or scroll your phone while driving. Permit holders cannot use a phone or other device at all, except equipment built into the car.
- Permit rules: who may supervise you and how many passengers you may carry.
Why it is called the DOT permit test
In Iowa, driver licensing is run by the Department of Transportation, not a separate DMV, so you will see "Iowa DOT" on the test, the manual and the appointment site, iowadot.gov. County treasurers in many counties also give the test and issue permits on the DOT's behalf. Note that Iowa's hydrant distance is 5 feet, shorter than in many states.
How to study for the Iowa permit test
- Read the Iowa Driver's Manual from iowadot.gov a section at a time.
- Learn road signs by shape and color, then by meaning.
- Write down every number: 15 feet, 5 feet, 10 feet, 20 feet, 0.02, 180 days.
- Take the Iowa DOT practice test (English or Spanish) and DMVZone practice tests, and review every miss.
- When you pass at 90% or more three times in a row, schedule the real test.
What to bring and how to book
Schedule through Iowa DOT's online scheduler or call your county treasurer. Many county offices test by appointment only. For your instruction permit, bring:
- A primary form of identification, such as a certified birth certificate.
- Proof of your Social Security number.
- Proof of Iowa residency (Buchanan County, for example, asks for two items showing your name and address).
- Parent or guardian consent: a parent in person, or the signed Form 430018.
- The permit fee.
You also pass a vision test. The full list is on iowadot.gov under "What documents do I need."
Can you take the Iowa permit test online?
Yes, if you are a teen. Iowa DOT lets students take the knowledge test at home with a parent as proctor. County guidance says you must be within 30 days of your 14th birthday or older, and under 18. How it works:
- A parent or guardian with a valid Iowa driver's license submits the Application to Proctor Knowledge Exam. Processing can take 7 to 14 days.
- After approval, an email link arrives. It expires after 72 hours.
- Take the test on a computer with internet. Phones and tablets are not allowed.
- After passing, book an appointment at a DOT station or county treasurer to get your permit.
Some schools also give the test through Iowa DOT's Skip the Trip program. Adults take the test in person.
What happens if you fail the Iowa permit test?
You can retake it. Iowa DOT does not publish a waiting period or attempt limit for the knowledge test, so ask your DOT station or county treasurer how soon you can book again. Spend that time on the topics you missed.
Iowa permit test FAQ
How many questions on Iowa permit test?
Iowa DOT does not publish the number for the real test. Its practice test has 25 questions, and third-party sites say the real test has 25 too.
How many questions can you miss on the Iowa permit test?
You need 80% or higher. On 25 questions, that would allow up to 5 misses.
Can you take your permit test online in Iowa?
Yes, if you are a teen. The test can be taken at home with a parent as proctor, after the parent's application is approved. You still visit an office to get the permit.
How old do you have to be for an Iowa permit?
At least 14.
