What the Idaho written test covers and how it's scored
Idaho's written knowledge test has 40 questions, and you need to answer at least 32 correctly to pass — that's 80 percent. The test covers traffic laws, road signs, safe driving practices, and what to do in emergencies. You take it on a computer at your local Idaho Department of Transportation office, and you get your score when ready after you finish.
The questions come from the Idaho Driver's Manual, which is free to read from the ITD website or pick up in person. Every question on the test is based on information in that manual, so studying it is your main preparation tool. You can retake the test if you fail, but you'll need to wait at least one day before your next attempt, and you'll pay the test fee again.
Idaho does not publish the exact breakdown of how many questions cover each topic, but the manual is organized by subject — road signs, right-of-way rules, speed limits, parking, alcohol and drugs, and more. The test draws from all of these areas, so a complete read-through of the manual is more reliable than trying to guess which topics matter most.
Key Takeaways
- You need 32 correct answers out of 40 questions to pass the Idaho written test, which you take on a computer at an ITD office.
- All test questions come directly from the Idaho Driver's Manual, which you can read free or pick up at any ITD office.
- You can retake the test the next day if you fail, but you pay the test fee each time.
- Road signs, traffic laws, right-of-way rules, and safe driving practices make up the bulk of the test content.
Where to take the test and what to bring
You take the written test at any Idaho Department of Transportation office. Idaho has ITD offices in Boise, Coeur d'Alene, Pocatello, and Twin Falls, plus smaller satellite locations in other towns. You can find the full list and hours on the ITD website, and many offices let you schedule an appointment online or by phone, though walk-ins are usually accepted too.
Bring a valid form of identification — a passport, birth certificate, or state ID card all work. You'll also need to bring proof of your Social Security number, such as a Social Security card or a tax return. If you're under 18, you may need a parent or guardian to sign consent forms, so check with your local office about their specific rules for minors.
The test itself is taken on a computer, and the ITD provides the computer and software. You don't need to bring anything to take the test itself — no calculator, no notes, nothing. The office staff will walk you through how to use the computer interface before you start, so even if you're not comfortable with computers, the process is straightforward.
How to study the Idaho Driver's Manual effectively
The Idaho Driver's Manual is organized into clear sections, and the best approach is to read it all the way through at least once, then go back and focus on the areas where you feel least confident. The manual is about 50 pages, so you can read it in a few hours, or break it into smaller chunks over several days.
Pay special attention to the road signs section — Idaho uses the same signs as every other state, but the test includes many sign-recognition questions. The manual shows each sign with its meaning and the action you should take. Flash cards or taking photos of the sign pages to review on your phone can help these stick in your memory.
Right-of-way rules are another area where many people struggle. Idaho's rules follow standard traffic law — for example, at a four-way stop, the first car to arrive goes first, and if two cars arrive at the same time, the car on the right has the right of way. The manual walks through dozens of scenarios, and understanding the logic behind each rule makes them easier to remember than trying to memorize them.
Take practice tests if you can find them. Some online sites offer free Idaho practice tests based on the manual, though you should verify they're current with the latest version of the manual. The ITD website itself does not host a practice test, but it does have sample questions you can review.
Common mistakes people make on the Idaho test
One frequent mistake is misunderstanding speed limits in residential areas. Idaho law sets a default speed limit of 25 miles per hour in residential zones unless a different limit is posted. Many test-takers assume the limit is higher or forget this rule entirely, so the manual emphasizes it repeatedly.
Another common error involves right-of-way at uncontrolled intersections — places with no traffic light or stop sign. The rule is that you must yield to any vehicle already in the intersection, and if two vehicles enter at the same time, the one on the right has the right of way. Test questions often describe these scenarios in ways that trip up people who haven't read the manual carefully.
Parking rules also catch people off guard. Idaho has specific rules about parking near fire hydrants, in handicapped spaces, on hills, and in other situations. The manual lists these, and several test questions cover them. If you've never read the parking section closely, you're likely to miss these questions.
Finally, many people underestimate questions about what to do after an accident or when you see an emergency vehicle. The manual covers these situations, and the test includes questions about them. Reading these sections carefully and thinking through the steps — call 911, move to safety, exchange information — helps you answer these questions correctly.
What happens after you pass or fail
If you pass the written test, you move on to the driving test. Idaho requires you to pass the written test before you can schedule a driving test, so passing opens that door. You don't need to wait any specific amount of time between passing the written test and taking the driving test — you can schedule the driving test as soon as you pass, though appointment availability may mean you wait a few days or weeks.
If you fail, you can retake the test the next day. There's no waiting period, but you do pay the test fee again each time you take it. Idaho's test fee varies slightly by office, but it's typically between $10 and $15. Some people fail once and pass on the second try; others take it three or four times. There's no limit on how many times you can retake it, so you can keep trying until you pass.
After you fail, take time to review the manual again, focusing on the areas where you felt uncertain. If you took notes during the test or remember which questions gave you trouble, go back to those sections in the manual and read them more carefully. Many people find that a second or third read-through of the manual makes the material click in ways it didn't the first time.
Age requirements and permit status for the written test
In Idaho, you must be at least 14 years old to take the written test and get a learner's permit. If you're 14 or 15, you're required to hold a learner's permit for at least six months before you can take the driving test. During that time, you must drive with a licensed adult who is at least 21 years old in the front seat.
If you're 16 or older, you can take the written test and then the driving test without the six-month waiting period, though you still need to pass the written test first. The written test is the same for all ages — there's no separate version for teenagers or adults.
You don't need a learner's permit to take the written test itself; you just need to be the right age and bring your ID and proof of Social Security number. Once you pass the written test, the ITD will issue your learner's permit, which you'll use while you practice driving before your driving test.
Frequently Asked Questions
Can I take the Idaho written test online from home?
No, Idaho requires you to take the written test in person at an ITD office on a computer provided by the office. You cannot take it remotely or at home. However, you can study the manual online or read it before you go to the office.
How long does the written test take?
Most people finish the 40-question test in 20 to 40 minutes. There's no time limit, so you can take as long as you need to read each question and think through your answer. You get your score when ready after you submit your answers.
What if I don't pass on my first try?
You can retake the test the next day. Review the Idaho Driver's Manual again, paying close attention to sections that confused you. Many people pass on their second or third attempt after a more thorough read-through of the manual.
Do I need to study road signs differently than other material?
Road signs appear frequently on the test, so spend extra time on the signs section of the manual. The manual shows each sign with its shape, color, and meaning. Reviewing the sign pages multiple times or making flash cards can help you recognize them quickly during the test.
Is the Idaho written test the same as the permit test?
Yes, the written test you take to get your learner's permit is the same test you take to get your driver's license. Passing it once qualifies you for both — you use it to get your permit, and then after you pass the driving test, you use it to get your full license.