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
You may retake the knowledge test at any Illinois Secretary of State Driver Services facility, not only the one where you tested the first time. There is no extra fee within the first three attempts. If you do not pass on the third attempt, you must reapply.
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 Driver Manual.
The five-day plan
The Secretary of State frames test coverage in three buckets: sign identification by shape, color, or symbol; identification of traffic signals and pavement markings; and multiple-choice or true-or-false questions on traffic laws, safety rules, crash prevention, and vehicle equipment. The plan below moves through each bucket and ends with a full practice run.
Day 1: Diagnose. Pull the failed score sheet and write down every category you missed. Open the manual to the chapter that covers each one. Do not start over from page one. If the failure concentrated on signs, you study signs. If it concentrated on DUI questions, you study Chapter 6. Categories you scored well on do not get review time.
Day 2: Signs. Drill 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 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. A solid line means do not cross; a broken line allows crossing when safe. The test phrases these carefully, and a single word ("solid" vs "broken") changes the correct answer.
Day 4: Laws and sharing the road. Walk 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 the speed limits (70 on rural interstates, 55 on rural roads, 30 in urban and residential areas, 20 in a school zone). Write the numbers down. Most people half-remember the dim distances as a single number, and the test will check whether you know which is which.
Day 5: Practice and final review. Take a full practice test at roadready.press/illinois/diagnostic. 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. Once you pass, you receive a permit, and if you are under 18, you must hold it for at least nine months and complete 50 hours of supervised driving (10 of those hours at night) before you take the skills test. 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 Driver Manual, Chapter 2 (Driver's License) and Chapter 9 (Traffic Signs).
Retake rules
- Retake wait (days)
-
No waiting period is published. The handbook, the licensing agency and the state code are all silent on how long you wait to retake the knowledge test, so ask at the counter before you leave; in practice the office decides.
- 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 (%)
-
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.
- Retake wait (days)
-
No waiting period is published. The handbook, the licensing agency and the state code are all silent on how long you wait to retake the knowledge test, so ask at the counter before you leave; in practice the office decides.
- Per-section minimums?
-
No per-section minimum
Source: Illinois Rules of the Road 2025, Chapter 2: Written Exam, p. 14
Fees
- Learner permit fee
-
$20
Source: Illinois Rules of the Road 2025, Chapter 1: Driver's License/State ID Card Fees, p. 11
- Knowledge test fee
-
$0 (no separate fee)
Source: Illinois Rules of the Road 2025, Chapter 1: Driver's License/State ID Card Fees, pp. 11-12
- Skills (road) test fee
-
$0 (no separate fee)
Source: Illinois Rules of the Road 2025, Chapter 1: Driver's License/State ID Card Fees, pp. 11-12
- First-time license fee
-
The Illinois Secretary of State fee schedule sets the Class D license at $30 for ages 21 to 68 and $5 for ages 18 to 20, so a first license issued before age 21 costs $5.
- Renewal fee
-
$30 (ages 21-68)
Source: Illinois Rules of the Road 2025, Chapter 1: Driver's License/State ID Card Fees, p. 11
- Non-driver ID card fee
-
$20 (ages 18-64)
Source: Illinois Rules of the Road 2025, 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.
The printable Illinois cheat sheet, free.
Every Illinois number and rule we track, ready to print.
Get the free PDF