Failed the Illinois DMV Test? Here's What to Do Next
Failing the knowledge test is more common than people expect, and most states let you try again quickly. Here's how the retake process works in Illinois and how to actually pass next time.
Failure on the first attempt is more common than the result sheet makes it feel. The Illinois Secretary of State plans for it: the knowledge test carries no separate fee, and you can retest at no charge within your first three attempts. Treat the failed score as a diagnostic, not a verdict. You already know which categories tripped you, and you have the manual that covers them.
The retake rules
Bring the same documents you brought the first time: proof of identity, proof of your full Social Security number, and proof of Illinois residency. A REAL ID-compliant license requires two residency documents; a standard license requires one. The full Acceptable Identification Documents chart sits on p. 106 of the Illinois Rules of the Road.
The five-day plan
The exam's three areas of coverage are set out in Test Day and the Illinois Knowledge Test. The plan below moves through each one and ends with a full practice run.
Day 1: Diagnose. You need a list of categories, not a list of questions. If the result you were handed breaks your score down by category, that is your list: write down every category you missed. If it does not, or you cannot remember what the questions were, do not try to reconstruct them. Retake the ten-question diagnostic at the front of this book, or draw a fresh test at roadready.press/illinois/practice-test, and use what you miss there instead. Do not re-sit the printed practice exam: you have already worked it, and a test you remember cannot diagnose you. Either route ends the same way: open the manual to the chapter covering each category on the list and work only those. Do not start over from page one, and give no review time to categories you are already sound on.
Day 2: Signs. Drill manual Chapter 9 until you can identify a sign by shape and color alone, before you read the legend. An octagon is a stop sign, always. A pennant is a no-passing-zone marker. An inverted triangle is a yield. A pentagon is a school sign or school crossing. A diamond is a warning. The test will show a sign and ask what action it requires; if you can name the category from the shape, the answer choices narrow fast.
Day 3: Signals and pavement markings. Work through manual Chapter 10. Know what each signal phase requires (steady red, flashing red, steady yellow, flashing yellow, steady green, green arrow) and what each line on the road communicates. Yellow lines separate traffic moving in opposite directions; white lines separate traffic moving in the same direction. The distinction the test leans on is solid against broken, and a single word changes the correct answer, so work that section until the pairing is automatic. Turning, Passing, and Lane Position carries the rule itself.
Day 4: Laws and sharing the road. Walk the manual through Chapters 4, 5, and 6. The high-frequency facts here are specific numbers: the 0.08 BAC limit for drivers 21 and older, the zero-tolerance rule for drivers under 21, the three-foot minimum when passing a bicyclist, the three-second following rule (three to four seconds behind a motorcycle), the 500-foot dim distance for oncoming traffic, the 300-foot dim distance for following another vehicle, and all six posted-speed road classes (70 interstates and tollways, 65 four-lane highways, 55 other highways and rural areas, 30 city and town areas, 20 school zones, 15 alleys). Write the numbers down.
Day 5: Practice and final review. Take a full practice test at roadready.press/illinois/practice-test. Do not look anything up while you take it. When you finish, work through every miss. If a category is still weak, return to that chapter for one more pass. Go to bed early.
After you pass
The knowledge test is the gate to the instruction permit.
Do not schedule the skills test until you can perform every required maneuver cleanly: the 50-foot straight-line backing exercise, the alley turnabout on the left side of the street, and uphill and downhill parking and starts with and without a curb.
A first failure is not a sign you are not ready to drive. It is a sign that one or two sections of the manual need a second pass. Treat the retake as a second attempt at a test you now know the shape of.
Manual reference: Illinois Rules of the Road, Chapter 2 (Driver's License Exams) and Chapter 9 (Roadway Signs).
Retake rules
- 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.
- Retake fee
-
The handbook does not list a separate retake charge; it says the application fee buys three attempts at each exam within one year of payment. After that the applicant must re-apply and pay again.
- Knowledge-test pass rate (%)
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60% pass; 2020-2023 pooled; all tests administered (first attempts not separated); knowledge test. The figure comes from a 2024 analysis of test results supplied by 36 state licensing agencies, pooled across 2020 to 2023. It counts every test administered, so retakes are mixed in with first attempts.
Test format and scoring
- Passing score (%)
-
80
- Number of questions
-
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.
- Num To Pass
-
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
-
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
-
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)
-
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.
Fees
- Learner permit fee
-
$20
Source: Illinois Rules of the Road 2026, Chapter 1: Driver's License/State ID Card Fees, p. 11
- Knowledge test fee
-
$0 (no separate fee)
Source: Illinois Rules of the Road 2026, Chapter 1: Driver's License/State ID Card Fees, p. 11
- Skills (road) test fee
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$0 (no separate fee)
- First-time license fee
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What a first license costs in Illinois depends on age, and for the readers of this book the published age bands are the wrong place to look. The Secretary of State's schedule runs $30 for ages 21 to 68, $5 for ages 18 to 20, $5 for 69 to 80, $2 for 81 to 86 and free from 87. There is no band below 18, in either the schedule or the manual's fee table, and that absence is not an oversight: a driver aged 16 or 17 reaches a license through the instruction permit, which costs $20, and the schedule notes that an applicant who receives the license before the instruction permit expires may not need to pay an additional fee. The permit is valid for 24 months, which is longer than the nine-month hold, so a teenager who moves through the graduated stages on schedule usually pays the $20 once and nothing again at issue. Budget the $20 permit fee as the real cost, treat the $5 as what applies if the permit has lapsed and the applicant is 18 to 20 by then, and check the current schedule before quoting any of it, because the manual prints its fee table under a warning that fees are subject to legislative change and sends readers to ilsos.gov for current figures.
- Renewal fee
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$30 (ages 21-68)
Source: Illinois Rules of the Road 2026, Chapter 1: Driver's License/State ID Card Fees, p. 11
- Non-driver ID card fee
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$20 (ages 18-64)
Source: Illinois Rules of the Road 2026, Chapter 1: Driver's License/State ID Card Fees, p. 11
- Retake fee
-
The handbook does not list a separate retake charge; it says the application fee buys three attempts at each exam within one year of payment. After that the applicant must re-apply and pay again.
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