Illinois Passing Score & Test Length
How many questions are on the knowledge test, how many you need to pass, and whether there is a time limit.
- Passing score (%)
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80
Source: 92 Ill. Adm. Code 1030.80(b): "a minimum of 35 questions, of which 80% percent must be answered correctly in order to be eligible for a Class D license." Verified Aug 2026
- Number of questions
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Illinois rule sets a floor rather than a fixed length: the Class D written exam must have at least 35 questions, of which 80 percent must be answered correctly. The Secretary of State does not publish an exact count.
Source: 92 Ill. Adm. Code 1030.80(b) (Driver's License Testing/Written Test, as amended eff. July 1, 2026): "a written test consisting of a minimum of 35 questions, of which 80% percent must be answered correctly" Verified Aug 2026
- Num To Pass
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Illinois sets the pass mark as a percentage of a test whose length is a floor, not a fixed count: the written exam must have at least 35 questions and 80 percent must be answered correctly. On the shortest permitted exam that is 28 correct. A longer exam raises the number of correct answers needed, because the 80 percent standard is what the rule actually fixes.
- Time Limit Minutes
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Illinois publishes no time limit for the written exam. Rules of the Road describes what the exam covers and the conduct rules enforced while you sit it, but names no duration, and the Secretary of State's driver-services pages do not either. Plan for the office's hours rather than a clock on the test.
- Test Format
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Illinois does not publish whether the written exam is taken on paper or at a computer terminal. The law is deliberately open on the point: the knowledge examination may be administered at a Secretary of State facility, remotely over the internet, or in any other manner the Secretary sets by administrative rule. That is permission rather than practice. For an ordinary Class D applicant today the exam is taken in person, because the Secretary of State's own renewal page says you must visit a DMV if you need to take a written exam. Do not plan around a delivery method the state has not committed to; it can change without a change in the law.
- Retake wait (days)
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Illinois does not make you wait to retake the written test. If you fail the first attempt, you may try again the same day during the office's normal business hours. Two limits sit on top of that. The office will refuse a same-day second attempt if your first attempt showed you to be a danger to public safety, and on the road test specifically there is no third attempt on a day you have already failed. The attempts themselves are capped rather than the days between them: your application fee covers three attempts at the written and road tests within one year of your first attempt, the first attempt counting as one of the three, and a fourth means a new application and a new fee. A separate stop applies to the road test only, after six failures: a seventh attempt needs a favorable medical report on file, unless one was filed within the previous 90 days. The longer waiting periods people sometimes quote after a failure (30 days, 90 days, a year) belong to commercial learner's permit and CDL applicants, not to an ordinary Class D applicant. One 30-day bar does reach a Class D applicant, but cheating triggers it rather than failing: anyone caught cheating on a written test is deemed to have failed it and cannot retake it for 30 days.
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