WA-CDL Passing Score 2026: Exactly What You Need to Pass

The Exact Passing Numbers for Each WA-CDL Knowledge Test

If you're preparing for the Washington CDL Permit Test, the single most important number to memorize isn't a study hour count - it's the correct-answer threshold for each knowledge exam the Washington State Department of Licensing requires. These numbers are fixed and non-negotiable, and they differ by domain.

• General Knowledge: 50 questions, 40 correct required (80%)
• Combination Vehicles: 20 questions, 16 correct required (80%)
• Air Brakes: 25 questions, 20 correct required (80%)

Notice the pattern: every WA-CDL knowledge test uses the same 80% passing standard, just applied to a different question count. That consistency makes the math easy to plan around, but it also means there's no "easy" domain where a lower bar lets you coast. Missing 11 questions on General Knowledge fails you exactly as decisively as missing 5 on Air Brakes.

How the WA-CDL Knowledge Tests Are Scored

The Washington CDL Permit Test is administered as a set of separate knowledge tests, each scored independently. You don't get a single blended "CDL score" - you either meet the correct-answer threshold on each required test or you don't. For a standard Class A applicant, that means passing three separate exams: General Knowledge, Combination Vehicles, and Air Brakes (assuming the vehicle you'll operate has air brakes, which most combination rigs do).

Because each test is scored on its own, a strong performance on General Knowledge can't offset a weak one on Combination Vehicles. This is one of the biggest misconceptions new applicants have - they assume "overall" preparation is enough, when in reality each domain has to independently clear its own bar. For a deeper look at how these domains interact and what weight each carries in your overall preparation, see the WA-CDL Exam Domains Guide.

What Each Domain Actually Tests

Understanding the passing score means nothing without understanding what's actually being asked. Here's what candidates need to master in each area.

For a full walkthrough of how these domains are weighted and sequenced in a study plan, the WA-CDL Exam Domains Guide breaks down every content area in detail, and How Hard Is the WA-CDL Exam? gives an honest look at where most applicants struggle.

Fees, Attempts, and the 90-Day Window

Passing score requirements don't exist in a vacuum - they're tied directly to how the Washington State Department of Licensing structures fees and attempts. Here's how the mechanics work:

• The knowledge-test fee is $35, and it covers one attempt at each required knowledge test.
• That fee window applies to tests taken within a 90-day period.
• A passed score is valid for 180 days from the date you pass it.

This means if you fail Combination Vehicles but pass General Knowledge and Air Brakes on the same visit, you don't lose your passing scores - they remain valid for 180 days while you prepare to retest the domain you missed. Understanding this structure helps you plan retests strategically rather than panicking after one weak result.

CLP Validity and the 14-Day Holding Period

Passing the knowledge tests is only the first milestone. Once you pass, you'll obtain a Commercial Learner's Permit (CLP), which costs $40 and is valid for 180 days. Washington also requires you to hold the CLP for at least 14 days before you're eligible to schedule the skills test. That 14-day rule matters for planning: even if you pass every knowledge test in one sitting, you can't walk into a skills test the next day. Build that mandatory waiting period into your timeline, especially if you're coordinating with an employer or training program on a start date.

Also worth noting: applicants must be at least 18 years old to test, though interstate operation requires being 21. Washington additionally requires at least 160 total training hours for Class A applicants and 80 hours for Class B, and applicable ELDT completion is mandatory before testing. For the complete eligibility picture - including required documents and medical self-certification - see WA-CDL Requirements 2026.

A Domain-Focused Study Timeline

Rather than studying everything at once, sequence your preparation around the domains and their question counts. Here's a practical four-week structure built specifically around the WA-CDL knowledge tests.

For a more detailed walkthrough of study strategy, including how to allocate time if you're balancing a job or training program, see the WA-CDL Study Guide 2026. Practicing with realistic questions on our practice test platform before test day is one of the most reliable ways to confirm you're consistently clearing each 80% threshold, not just close to it.

Common Ways Applicants Fall Short of Passing

The passing score itself is simple math, but plenty of otherwise well-prepared applicants still miss it. A few patterns show up repeatedly:

• Treating Combination Vehicles as an afterthought. With only 20 questions, missing 5 fails the test - there's less margin than the 50-question General Knowledge exam.
• Skipping Air Brakes practice because "it seems simple." The system-specific vocabulary (dual air systems, low-pressure warnings) trips up applicants who only skim the material.
• Not accounting for the 90-day fee window. Waiting too long between attempts can mean paying again rather than retesting under the original fee.
• Underestimating ELDT and training-hour requirements. Applicants sometimes assume the knowledge test is the only barrier, forgetting the 160/80-hour training requirements tied to Class A and Class B.

If you want a data-informed view of where candidates typically struggle across all three domains, WA-CDL Pass Rate 2026: What the Data Shows and How Hard Is the WA-CDL Exam? both dig into difficulty patterns without relying on invented statistics.

What Happens After You Hit the Passing Score

Passing your knowledge tests is a milestone, not the finish line. Once you've cleared the 80% threshold on each required test, your next steps are:

1. Apply for your CLP ($40 fee), which stays valid for 180 days.
2. Hold the CLP for at least 14 days before scheduling the skills test.
3. Complete any remaining ELDT hours if you haven't already.
4. Schedule and pass the skills test to convert your CLP into a full CDL.

Keep in mind that Washington has stopped all non-domicile CLP and CDL transactions, so testing and licensing must be handled through your state of domicile. For context on who actually hires drivers holding a Washington CDL - and what kind of roles are realistic after licensing - see WA-CDL Jobs and WA-CDL Salary Guide 2026. If you're still weighing whether pursuing the credential fits your goals, Is the WA-CDL Certification Worth It? walks through the return on the time and training investment.

For applicants who want a single condensed reference to keep nearby while studying, the WA-CDL Cheat Sheet 2026 summarizes the must-know numbers - including the exact passing thresholds covered here - on one page. And if you haven't locked in your testing timeline yet, WA-CDL Exam Dates 2026 covers scheduling windows and deadlines you'll want to plan around.

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