Guide · Updated Oct 17, 2026
Free CDL Practice Test vs Paid CDL Prep: Pick One
Free practice is enough if you already know what to study and you review every question you miss. Pay for prep only if you do not know what to study first or when you are ready to book. By the end of this page you will have a 20-minute test that tells you which one you are, and a score sheet that tells you when to book.
The bar is the same for both: 80 percent on each test
Federal rules say you must answer at least 80 percent of the questions correctly on each CDL knowledge test. A free bank does not lower that bar. A paid plan does not raise it. The only question is which one gets you reliably above it.
Your state sets the question count, the fees and any added rules, so keep your state CDL manual open next to whatever you use.
Free is strong now, so the real choice is a bank or a plan
You are not choosing between free and nothing. Crist CDL's site says it offers free practice tests for General Knowledge, Air Brakes, Combination, Tanker, Hazmat, Doubles/Triples, Passenger and School Bus, with no registration, and that you can take them as many times as you want. Free apps exist too, such as the CDL Test Prep app on the App Store, which describes itself as based on your state's 2026 manual. Test sites like Driving-Tests.org publish state-specific General Knowledge questions as well.
So a question bank costs you nothing. What a bank does not do is tell you what to study first, tell you when to book, or bring your misses back on a schedule. That is the whole case for paying, and it is a small one if you can do those three things yourself.
Compare them on guidance, not question count
| What you need | Free question bank | Guided plan (FirstTry CDL) |
|---|---|---|
| Practice questions | Lots, retake as often as you like | Timed practice tests in the exam format |
| What to study first | You decide | A free 10-minute diagnostic shows weak spots |
| When to book | You watch your score | A Readiness Score |
| Redoing misses | You track them yourself | Mistake Fixer re-drills at 1, 3 and 7 days |
| Ads and sign-ups | Check each site | No ads, and no account for the free parts |
| Cost | Free | One time, no subscription: $49 as the founding driver price for the first 500 drivers, then $79. General Knowledge only is $39 for 30 days |
| Same either way | Your state manual, your state rules, and no promise of a pass | Same |
Free banks are stronger on volume and on being free. A plan is stronger on order, a booking signal and spaced review. If you need none of those three, the table says stay free.
Take this 20-minute test to see which one you are
- Write down your test date and the hours a week you can study.
- Take one free diagnostic or timed test for each test type you need.
- Write down your three lowest topics.
- Study only those three from your state manual for two days, then retest.
- If the scores moved, you can guide yourself. Stay free.
- If they did not move, ask what is missing. If you need more questions, add another free bank. If you cannot tell what to fix or when you are ready, a plan is the part worth paying for.
The mistake to skip: buying a bigger bank when the real problem is not knowing what to study. You end up with more questions and the same confusion.
Book only after three timed tests at 85 percent or higher
Don't book on a bare 80. One bad day and you are under the line, and that costs a retest fee and a wait. My rule is a suggestion, not a legal number: book when your last three full timed tests on the same test type are all at 85 percent or higher.
Keep the score by test type, not as one blended number. The federal rule says that if you score under 80 percent on the air brakes portion, the permit or license gets an air brake restriction, and if you score under 80 percent on the combination vehicles portion, a Group A permit or license cannot be issued. A strong General Knowledge score can hide a weak Air Brakes score.
Copy this sheet:
| Date | Test type | Questions | Wrong | Score % | 85 or higher? |
|---|---|---|---|---|---|
Rule under it: book when the last three rows for that test type are all yes.
Know how many you can miss
Wrong answers allowed = total questions x 0.20, rounded down. Example: say your test has 50 questions. You can miss at most 10 and still hit 80 percent. At 85 percent you can miss 7. Swap in the count from your state manual. Our General Knowledge guide walks through that budget for one test.
Keep a miss list, because repeat misses are what fail people
A second miss on the same question is the one that costs you. Keep a list with four columns: topic, why you missed it (did not know, misread it, looked right but was incomplete), the manual page, and the days you will redo it. Redo it on day 1, day 3 and day 7.
You can do this on paper for free. It is the part a plan automates, and it is a fair reason to pay if you will not keep a list.
Do the cost math before you pay anything
Two numbers decide it.
Per day: price divided by the days you will use it. Example: say you use a $49 program for 21 days. That is about $2.33 a day. At $79 it is about $3.76 a day.
Break-even: divide the price by your state's retest fee. Example: say your retest fee is $30. A $49 program has paid for itself if it prevents 2 retests, since 49 divided by 30 rounds up to 2. Look up your real fee in the permit cost by state guide or your state manual.
Then add the cost people forget: days waiting for the next test slot, and ads or sign-ups that eat study time.
One thing to read before you pay for anything, here or elsewhere: what happens if you do not pass. FirstTry CDL's Pass Promise keeps your access free until you pass and adds a new targeted plan. It is not a cash refund, it does not cover retest fees, and it is not a promise to pass.
Pick by your situation
| If you are... | Pick |
|---|---|
| Studying one test, know your weak topics, will review every miss | A free bank plus your state manual |
| Scoring in the same range and cannot say why | Free diagnostic first, then decide |
| Working full time with an hour a day and a test date | A day-by-day plan, because it removes the daily "what do I study" choice |
| Studying General Knowledge only | A free bank, or the $39 General Knowledge option if you want the plan for 30 days |
| Studying several endorsements | Score each test type separately; a plan helps most when you have many tests to order |
| Unsure whether the free site you found is accurate | Read how to check one in our practice test accuracy guide |
Do this in the next ten minutes
Open your state CDL manual and find two numbers: the question count for your first test and the retest fee. Then make the score sheet above on paper or in your phone notes, and take one free timed test. Write the score in the first row. That tells you where you stand today, with no money spent.
The free diagnostic shows you which side you are on
FirstTry CDL's free diagnostic takes about 10 minutes, needs no account and gives you a predicted score and your weak spots. The practice questions are exam-style and built from the official CDL manual. If your weak spots are clear and you know what to do about them, keep going free. If you want the plan, the Readiness Score and the Mistake Fixer around them, you will know why. Take the free diagnostic.
FirstTry CDL is a CDL permit test prep site by Hive Asset Group, LLC. It offers free exam-style practice tests built from the official CDL manual. FirstTry CDL is not affiliated with any DMV, FMCSA or government agency. Practice questions are exam-style questions built from the official CDL manual, not actual test questions.
Practice next
Rules, fees and test details differ by state. Pick yours:
Common questions
Is a free CDL practice test enough to pass?
It can be, if you know what to study first and you review every miss. Federal rules require at least 80 percent on each knowledge test, and your state manual sets the details. Free practice only falls short when you cannot tell what to fix or when you are ready.
What score do I need to pass the CDL written test?
Federal rules say at least 80 percent correct on each knowledge test. Question counts and fees differ by state, so check your state CDL manual. A good habit is to book after three timed tests at 85 percent or higher.
Is paid CDL prep worth it?
It is worth it when the thing you are missing is guidance: what to study first, when to book, and a schedule for redoing misses. Run the 20-minute test on this page first. If your scores move with free practice, you do not need to pay.
What is the difference between a question bank and a study plan?
A bank gives you questions to answer. A plan tells you what to study in what order, shows when you are ready to book and brings your misses back on a schedule. FirstTry CDL offers a day-by-day plan, a Readiness Score and a Mistake Fixer that re-drills at 1, 3 and 7 days.
What does the Pass Promise cover?
Access stays free until you pass, plus a new targeted study plan. It is not a cash refund, it does not cover retest fees and it is not a promise to pass.