- The Mississippi CDL knowledge test passing score is 80%, administered by the DPS Driver Service Bureau.
- General Knowledge is required for every applicant; endorsement and skills content build on the same 80% standard.
- The skills test (Vehicle Inspection, Basic Vehicle Control, On-Road Driving) is pass/fail, not percentage-scored.
- You must hold your CLP at least 14 days before skills testing, so plan study time around that window.
The Actual Passing Score You Need
If you're wondering exactly what score gets you a Mississippi commercial learner's permit, the answer is simple and non-negotiable: 80% on each required knowledge test. That threshold applies to the General Knowledge exam that every applicant must pass, and it applies to any endorsement knowledge tests you add on top of it. There's no partial credit system, no curve, and no rounding up from 79%. You either hit 80% correct or you retake the test.
This standard is set by the Mississippi Department of Public Safety, Driver Service Bureau, which administers CDL licensing and testing statewide and also recognizes approved third-party skills testers for the driving portion. Because the knowledge test is scored as a straight percentage of correct answers, your prep strategy should be built around minimizing wrong answers across every topic area - not just the ones you find interesting.
How the Knowledge Test Is Scored
The scoring mechanism itself is straightforward, but a lot of candidates misunderstand what it means in practice. Every question you answer correctly counts toward your percentage; every question you get wrong counts against it. Reach 80% and you pass that specific knowledge test. Fall short, and you'll need to schedule a retake before you can move forward with your CLP application.
Because General Knowledge is mandatory for all applicants, it's the one test everyone has to clear regardless of what type of driving they plan to do. If you're pursuing endorsements (like Hazardous Materials, which carries its own fee), you'll face additional knowledge tests on top of General Knowledge - each scored the same way, each requiring the same 80%.
For a full walkthrough of exactly what's tested and how the content is organized, the MS-CDL Study Guide 2026 lays out a first-attempt approach that's built specifically around this scoring structure.
Key Takeaway
Treat 80% as a floor, not a target. Aim to study until you're consistently scoring well above that mark on practice questions, since real exam anxiety and unfamiliar phrasing can cost you a few points on test day.
Why the Skills Test Isn't Graded on a Percentage
Once you've held your CLP for at least 14 days, you become eligible to schedule the skills test - and this is where the scoring model changes completely. The skills test has three segments: Vehicle Inspection, Basic Vehicle Control, and On-Road Driving. There's no 80% cutoff here. Instead, each segment is evaluated on specific criteria and safety-critical actions, and the result is pass or fail for that segment.
This matters for how you prepare. Knowledge-test studying is about accumulating correct answers across a broad set of facts. Skills-test preparation is about consistently performing specific, observable actions correctly every single time - because a single serious error (like missing a critical inspection item or an unsafe driving maneuver) can fail that segment regardless of how well you performed on everything else.
If you're trying to gauge how much total effort this represents, the How Hard Is the MS-CDL Exam? Complete Difficulty Guide 2026 breaks down the knowledge-versus-skills workload so you can plan accordingly.
How the 3 Domains Factor Into Your Score
The General Knowledge test content is organized around three core domains, and understanding how they interact with the 80% threshold changes how you should allocate study time.
Domain 1: Introduction
Covers foundational material about the CDL system itself, licensing structure, and the basics you need before anything else makes sense.
- Frame this domain as the vocabulary and context for everything that follows
Domain 2: Driving Safely
Focuses on the operational judgment and safety practices that make up the bulk of real-world commercial driving decisions.
- Expect this to be the densest domain in terms of question volume - budget more review time here
Domain 3: Transporting Cargo Safely
Covers cargo-specific knowledge that applies regardless of what you're hauling, tying directly into inspection and loading practices assessed later during skills testing.
- Connect this domain mentally to the Vehicle Inspection segment of the skills test - the concepts overlap
Since the knowledge test doesn't tell you which domain a missed question came from in real time, a weak spot in any single domain can quietly drag your overall percentage below 80%. For a deeper breakdown of what's tested inside each of these three areas, see the MS-CDL Exam Domains 2026: Complete Guide to All 3 Content Areas.
| Test Component | Passing Standard | Format |
|---|---|---|
| General Knowledge (all domains) | 80% correct | Written/computer-based knowledge test |
| Endorsement knowledge tests (as applicable) | 80% correct | Written/computer-based knowledge test |
| Vehicle Inspection segment | Pass/fail | Hands-on demonstration |
| Basic Vehicle Control segment | Pass/fail | Hands-on maneuvering |
| On-Road Driving segment | Pass/fail | Live road evaluation |
Fees, Paperwork, and What Happens Before You Test
Passing the exam is only useful if your paperwork and permit status are in order first. Before you can sit for any knowledge test, you'll need a completed application, accepted identity and Social Security documents, two proofs of Mississippi residency, legal-name documents where applicable, and a current medical card. Applicable ELDT (Entry-Level Driver Training) is also required before certain testing steps, so don't assume you can walk in and test without completing that piece first.
On the fee side, the current schedule lists $16 for a CDL learner's permit, $55 for a five-year CDL, $5 for standard endorsements, and $100 for Hazardous Materials. These fees are separate from any training costs and don't change based on how many attempts it takes you to pass - so failing a knowledge test and retesting adds time, not necessarily a new permit fee, but it's worth confirming current retest policy with the Driver Service Bureau when you schedule. For a full cost breakdown across every step of the process, see the MS-CDL Certification Cost 2026: Complete Pricing Breakdown.
Remember also that your CLP must be held for a minimum of 14 days before you're eligible for the skills test - this isn't a suggestion, it's a hard eligibility gate built into the timeline. If you're mapping out your overall schedule from application to road test, the MS-CDL Exam Dates 2026: Testing Windows, Deadlines & Scheduling article walks through how to sequence everything around that waiting period.
For the complete list of eligibility requirements and documentation you'll need before you can even sit for the knowledge test, check the MS-CDL Requirements 2026: Eligibility, Prerequisites & How to Qualify guide.
A Focused Timeline for Hitting 80%
Given the 14-day CLP hold and the pass/fail nature of the skills test, your prep window naturally splits into two phases: knowledge-test mastery first, then skills repetition during the mandatory waiting period.
Domain 1 & Domain 2 foundations
- Read through Introduction and Driving Safely material in the current manual
- Run practice questions until you're consistently above 80% on these two domains alone
Domain 3 plus full-length review
- Focus on Transporting Cargo Safely, since it ties directly into Vehicle Inspection content
- Take full practice sessions covering all three domains together to simulate real test conditions
Skills test preparation
- Practice the Vehicle Inspection walkthrough until it's automatic
- Repeat Basic Vehicle Control maneuvers and get comfortable with your test vehicle
- Log supervised on-road practice with your licensed accompanying driver
This structure isn't generic filler - it's specifically shaped around the fact that you can't schedule your skills test until day 14 anyway, so using that period for hands-on practice rather than more knowledge review is the more efficient use of time.
Common Reasons Candidates Miss the Cutoff
Most people who fall short of 80% aren't failing because the material is obscure - they're failing because of predictable, avoidable gaps.
- Treating one domain as "the easy one." Every domain counts equally toward your final percentage, so skimming Domain 1 to focus on Domain 2 can quietly tank your score.
- Studying an outdated manual. The current official manual was updated March 10, 2025 from a base version dated September 9, 2022 - make sure you're studying the current posting, not an old PDF saved from years ago.
- Showing up to the skills test without required paperwork. A missing medical card, unlicensed accompanying driver, or lack of proof of insurance can stop your skills test before you even start driving.
- Underestimating cargo-related questions. Transporting Cargo Safely content connects directly to the Vehicle Inspection segment later, so weak prep here has a compounding effect.
- Testing before ELDT is complete. Applicable ELDT requirements must be satisfied as part of the process - don't assume you can skip straight to the knowledge test.
To see how difficulty and pass rates actually play out for candidates going through this process, the MS-CDL Pass Rate 2026: What the Data Shows article and the Is the MS-CDL Certification Worth It? Complete ROI Analysis 2026 guide are useful companion reads. And if you want to practice against realistic questions before your actual test date, you can start running full practice sessions at the main practice test hub to see where your score currently stands.
Once you're through the knowledge test and skills test, it's worth thinking ahead to what the credential actually opens up. Employers hiring drivers care that you hold a valid Mississippi CDL with the right endorsements for the freight or route type involved - details covered in the MS-CDL Jobs overview and the MS-CDL Salary Guide 2026: Complete Earnings Analysis. If you're still building your training plan before test day, the MS-CDL Training resource and a quick practice test run-through can help confirm you're ready to sit for the real thing.
FAQ
You need 80% correct on each required knowledge test, including the mandatory General Knowledge test and any endorsement tests you take.
No. The skills test - covering Vehicle Inspection, Basic Vehicle Control, and On-Road Driving - is evaluated as pass or fail per segment, not as a percentage score.
You must hold your CLP for at least 14 days before you're eligible to schedule the skills test, in addition to completing applicable ELDT requirements.
Yes. Standard endorsement knowledge tests and the Hazardous Materials knowledge test follow the same 80% passing standard as the General Knowledge test.
You'll need a valid Mississippi license and CLP, your permit application, a current medical card, a properly licensed accompanying driver, an appropriate vehicle, and proof of insurance and registration.