How many questions are on the Iowa DOT knowledge test?
The Iowa DOT knowledge test has 25 questions, single score. You need 20 correct (80%) to pass. Road signs are included in the 25 — there is no separate signs test.
What is the passing score?
You need 20 out of 25 correct (80%) to pass. Single unified score — you can miss up to 5 questions and still pass.
What happens if I fail?
You must wait until the next calendar day to retake the test. There's no limit on attempts, but you'll need to pay the testing fee again. If you fail the driving skills test, the examiner will set the wait period before you can retake.
Is the test timed?
No, the real Iowa DOT test has no time limit. Take your time and read carefully. Our practice exam uses a 20-minute timer to simulate slight pressure, but the real test lets you go at your own pace.
How old do I need to be for a learner's permit?
Age 14 years old — one of the youngest in the US. Parental or guardian consent is required. Hold the permit for at least 12 months, complete driver education, and log 20 supervised driving hours before applying for the intermediate license at 16.
What documents do I need to bring?
For a first-time permit or license, bring:
- Proof of identity — birth certificate, passport, or other government-issued ID
- Social Security card or document showing your SSN
- Two proofs of Iowa residency — utility bill, bank statement, lease, etc.
- Parent/guardian must be present if you're under 18
- Parental/guardian consent required if under 18 — they must appear in person or provide a signed consent form
Does Iowa use "DUI" or "OWI"?
Iowa uses OWI — Operating While Intoxicated. The test will use OWI terminology, not DUI. Key numbers: 0.08% BAC limit (21+), 0.02% BAC for under 21, test refusal triggers mandatory 1-year revocation. Refusing a chemical test = automatic 1-year loss of driving privileges.
Is cannabis legal in Iowa?
Recreational cannabis is illegal in Iowa. Iowa has a limited medical cannabidiol program for registered patients (Iowa Code Chapter 124E), but it does not permit smokable flower. Driving under the influence of any controlled substance, including marijuana, is an OWI offense with the same penalties as alcohol-impaired driving.
How many hours of practice driving do I need?
20 hours of supervised behind-the-wheel driving, including at least 2 hours at night. Your supervisor must be a parent/guardian, family member 21+, driver education teacher, or a licensed driver 25+ with written parental permission.
What are Iowa's GDL graduated license restrictions?
Iowa intermediate license curfew: 12:30 AM to 5:00 AM. Iowa GDL: Instruction Permit (age 14) → Intermediate License (age 16, after 12 months + 20 supervised hours + driver ed) → Full License (age 17, after 12 months with clean record). First 6 months of intermediate: max 1 unrelated minor passenger.