Most states let you miss 6 to 8 questions out of 50, but the exact number depends on where you take the test
The passing score on a written permit test is usually 80 percent correct answers. That means on a 50-question test, you can typically miss up to 10 questions and still pass. On a 40-question test, you can miss 8. On a 30-question test, you can miss 6. However, some states use different test lengths or different passing scores — a few require 85 percent or even 90 percent — so the number of questions you can afford to miss varies by location.
Your state's Department of Motor Vehicles (DMV) or equivalent agency sets both the test length and the passing score. Before you schedule your test, check your state's official DMV website to find the exact requirements. This matters because missing one extra question in a state with a 90 percent requirement will fail you, whereas the same score passes in a state with an 80 percent requirement.
Key Takeaways
- An 80 percent passing score means you can miss 10 questions on a 50-question test, 8 on a 40-question test, and 6 on a 30-question test.
- Some states require 85 or 90 percent instead of 80 percent, which cuts the number of questions you can miss by 2 to 4.
- Your state's DMV website lists the exact test length and passing score before you schedule.
- The number of questions you can miss does not change if you retake the test — the passing score stays the same each time.
How passing scores are calculated across different states
Most states use an 80 percent passing score, which is the standard adopted by the National Highway Traffic Safety Administration (NHTSA) as a baseline. However, enforcement varies. Some states — including Georgia, Illinois, and Ohio — stick to 80 percent. Others, like California and Texas, also use 80 percent on their written test. A smaller group, including some versions of tests in Florida and New York, may require 85 percent on certain test formats.
A few states go higher. Some require 90 percent on the written portion, meaning you can miss only 5 questions on a 50-question test. This is less common but does occur in certain jurisdictions or for certain license classes. The difference between 80 and 90 percent sounds small — 10 percentage points — but it translates to missing 5 fewer questions on a 50-question test, which is significant when you are studying.
To find your state's exact requirement, visit your DMV's website and search for "written test passing score" or "permit test requirements." The information is usually in a section labeled "Knowledge Test" or "Written Exam." Write down both the test length and the passing percentage before you study, so you know your target.
What happens if you score exactly at the passing line
If you score exactly at the passing percentage — for example, 80 percent on an 80 percent requirement — you pass. There is no rounding down or rounding up; the test is scored as a straightforward percentage. If the test has 50 questions and you answer 40 correctly, that is 80 percent, and you pass. If you answer 39 correctly, that is 78 percent, and you fail.
Some DMV locations display your score when ready on screen after you finish. Others mail the result or post it online within a few days. Either way, the score is final — there is no partial credit for nearly correct answers or for showing your work. Each question is either right or wrong.
How test length affects the number of questions you can miss
Different states use different test lengths, which changes how many questions you can miss while staying at or above the passing score. Here is how the math works across common test lengths at an 80 percent passing requirement:
| Test Length | 80% Passing Score | Questions You Can Miss |
|---|---|---|
| 30 questions | 24 correct | 6 |
| 40 questions | 32 correct | 8 |
| 50 questions | 40 correct | 10 |
| 60 questions | 48 correct | 12 |
Most states use either 40 or 50 questions. A handful use 30. Test length is set by your state's DMV and does not change between test dates or between retakes. If you fail and retake the test, you will see the same number of questions.
Retaking the test if you miss too many questions
If you score below the passing percentage, you fail and must retake the test. Most states let you retake it the same day or within a few days, though a few impose a waiting period of 1 to 7 days between attempts. Each retake costs the same fee as the original test — usually between $10 and $50 depending on your state.
The passing score does not change on a retake. You still need the same percentage correct. Some people find it helpful to review the questions they missed on the first attempt, though not all DMV locations provide a detailed breakdown. Ask at your testing location whether they give you a list of topics you missed so you can focus your study time.
There is usually no limit on the number of times you can retake the test, though some states cap retakes at a certain number per year or require additional waiting periods after multiple failures. Check your state's rules before your first attempt so you know what to expect if you do not pass on the first try.
Studying to stay well above the passing score
Knowing you can miss 6 to 10 questions does not mean you should aim for the passing score. Most people who study seriously score 90 to 95 percent, which gives them a comfortable margin. This matters because test anxiety, misread questions, and straightforward mistakes happen to everyone. If you study to score 90 percent, missing a few questions you thought you knew still leaves you well above 80 percent.
Your state's DMV usually provides a study guide or handbook that covers all the topics on the test. Some states also offer practice tests online or through their website. Using these resources before you schedule your test is the most direct way to prepare. Many people also use third-party practice test apps, which can be helpful as long as they cover your state's specific rules and road signs.
Frequently Asked Questions
Can I see which questions I missed after I fail?
Most DMV locations do not provide a detailed breakdown of missed questions. Some give you a general category — for example, "You missed 3 questions on right-of-way" — but not the specific questions. Ask your testing location what they provide. If they do not give feedback, focus your next study session on the topics you felt least confident about.
Does the passing score change if I take the test online instead of in person?
No. Whether you take the test at a DMV office, a third-party testing center, or online (if your state offers it), the passing score and test length remain the same. The format changes, but the standard does not.
What if my state requires 85 or 90 percent instead of 80 percent?
On a 50-question test with an 85 percent requirement, you can miss 7 or 8 questions instead of 10. With a 90 percent requirement, you can miss only 5. Check your state's DMV website to confirm the exact passing score before you study, because this significantly changes your target.
Do I have to pass the written test and the road test with the same score?
No. The written test and the driving test are scored separately. You need to pass the written test first, then schedule the driving test. The passing score for the driving test is different and is usually based on a point system rather than a percentage. Passing one does not affect the other.