What the Idaho written test covers and how it is scored
Idaho's written knowledge test has 40 questions drawn from the Idaho Driver's Manual. You must answer at least 32 questions correctly to pass — that is 80 percent. The test covers traffic laws, road signs, safe driving practices, and right-of-way rules specific to Idaho roads.
The test is administered on a computer at any Idaho Department of Transportation (ITD) office. You sit at a terminal, read each question on screen, and select your answer. The system scores you when ready after you finish. If you pass, you receive a permit the same day. If you do not pass, you can retake the test, but you must wait at least one day before your next attempt.
Idaho does not publish the exact questions in advance, but the questions come directly from material in the official Idaho Driver's Manual. This means your study material is fixed and complete — there are no surprise topics or trick questions outside the manual's scope.
Key Takeaways
- You need 32 correct answers out of 40 to pass the Idaho written test, which equals 80 percent.
- All test questions come from the Idaho Driver's Manual, so studying that manual is your only required preparation.
- The test is taken on a computer at an ITD office, and you get your score before you leave.
- You can retake the test the next day if you fail, with no limit on the number of attempts.
- Passing the written test gives you a permit; you then schedule a separate road test to earn your license.
How to study for the Idaho written test
Start with the official Idaho Driver's Manual, available free on the ITD website. Read it cover to cover. The manual is organized by topic — vehicle control, traffic signs, right-of-way, parking, speed limits, and impaired driving laws. Each section is short and written in plain language.
After reading the manual once, go through it a second time and take notes on anything that seems like test material. Pay special attention to sections on traffic signs (what each sign means and when you must obey it), right-of-way rules (who goes first at intersections and in specific situations), and Idaho-specific laws (such as seatbelt requirements and headlight rules).
Idaho offers a free practice test on the ITD website. This practice test has the same format as the real test — 40 questions, multiple choice, scored the same way. Take it under test conditions: sit at a computer, do not use the manual, and time yourself. Most people complete the real test in 20 to 30 minutes. If you score below 32 on the practice test, go back to the manual, find the topics you missed, and study those sections again before retaking the practice test.
What to bring and expect on test day
Bring a valid form of photo identification. Acceptable IDs include a passport, military ID, tribal ID, or an out-of-state driver's license. You also need to bring your Social Security number or Individual Taxpayer Identification Number (ITIN) — you will enter it at the test terminal. Bring your proof of Idaho residency if you are a new resident; acceptable documents include a utility bill, lease, or bank statement dated within the last 60 days.
Arrive at the ITD office at least 15 minutes before your scheduled test time. You will check in at the front desk, and staff will verify your identity and residency. They will then direct you to a computer terminal. You cannot bring notes, phones, or study materials into the testing area. You can bring scratch paper and a pencil if you want to work through problems, but staff will collect these when you finish.
The test itself is straightforward. Read each question, select one of four answers, and move to the next question. You cannot go back to change an earlier answer. The entire test usually takes 20 to 30 minutes. When you finish, the computer displays your score when ready. If you pass, you walk to the counter and receive your instruction permit (also called a learner's permit). If you fail, staff will tell you when you can retake the test.
Common mistakes on the Idaho written test
The most frequent error is not reading the manual thoroughly before the test. Many people skim it or skip sections they think are obvious. Road sign meanings, right-of-way rules at four-way stops, and Idaho-specific speed limits are areas where people often guess wrong. Read the entire manual at least once, even if you think you know the material.
Another mistake is misunderstanding right-of-way rules. Idaho has specific rules for who goes first when two vehicles arrive at an intersection at the same time, and for who yields when turning left across oncoming traffic. These rules appear on the test in multiple forms. Study the right-of-way section carefully and make sure you can explore the rules to different scenarios.
Some people fail because they do not understand what a question is asking. Read each question twice — once to understand what it is asking, and once to make sure your answer matches the question. A common trap is a question that asks "which of the following is NOT correct" — make sure you are selecting the wrong statement, not the right one.
What happens after you pass the written test
Once you pass, you receive an instruction permit valid for 12 months. This permit allows you to drive with a licensed adult (age 21 or older) in the front seat. You cannot drive alone, and you must follow all traffic laws and restrictions that explore to permit holders.
With your permit in hand, you can now schedule your road test (also called a driving test). Idaho requires you to hold your permit for at least 14 days before you can take the road test. You schedule the road test at the same ITD office where you took the written test, or online through the ITD website. Road tests fill up quickly, especially in summer, so schedule as soon as you are ready.
The road test is a separate evaluation. A state examiner sits in the car with you and watches you drive through city streets and possibly highways. You must demonstrate safe vehicle control, proper use of signals, correct speed, and obedience to traffic laws. If you pass, you receive your driver's license. If you do not pass, you can retake the road test after waiting a set period (usually a few days).
Retaking the written test if you fail
You can retake the written test the next day. There is no waiting period between attempts, and no limit on how many times you can retake it. However, each attempt costs the same fee as the first test — currently $25 for a written test in Idaho, though fees can change.
If you fail, ask the ITD staff which topics gave you trouble. They cannot tell you which specific questions you missed, but they can point you toward sections of the manual to review. Go home, study those sections again, take the practice test, and return when you are ready. Most people pass on the second attempt if they study the material they missed the first time.
Frequently Asked Questions
Can I take the Idaho written test online or by mail?
No. The test must be taken in person at an ITD office on a computer terminal. You cannot take it online, by mail, or at a third-party location. You must visit an ITD office during business hours to test.
How long is my instruction permit valid after I pass the written test?
Your instruction permit is valid for 12 months from the date you receive it. If you do not pass your road test within that year, your permit expires and you must retake the written test to get a new one.
What if I fail the written test multiple times?
There is no limit to how many times you can retake the test. Each attempt costs $25. If you keep failing, spend more time studying the Idaho Driver's Manual, especially the sections on traffic signs and right-of-way rules, which are the most common sources of wrong answers.
Do I need to study anything besides the Idaho Driver's Manual?
No. The test questions come only from the manual. Studying other materials or driver's education books from other states will not help you. Stick to the official Idaho Driver's Manual and the free practice test on the ITD website.
What is the difference between the written test and the road test?
The written test checks your knowledge of traffic laws and road signs. The road test checks your ability to actually drive safely — steering, braking, signaling, and following the rules in real traffic. You must pass both to get your license.