Complete Guide to the ICBC Class 4 Knowledge Test in BC (2026)

What Is the ICBC Class 4 Licence?

A Class 4 driver's licence in British Columbia authorises you to operate vehicles carrying up to 24 passengers, including taxis, ride-share vehicles (Uber, Lyft), ambulances, special activity buses, and work-crew buses. It is the required licence for anyone driving commercially for passenger transport in BC.

To apply for a Class 4 licence, you must already hold a valid, full (non-learner) Class 5 driver's licence. The upgrade involves passing both a Class 4 knowledge test and a Class 4 road test. This guide focuses on the knowledge test.

Class 4 Knowledge Test Format

The ICBC Class 4 knowledge test consists of 40 multiple-choice questions. You must answer at least 32 out of 40 correctly — an 80% passing score — to pass. The test costs $15 per attempt and can be retaken as many times as needed.

The Class 4 test is administered at ICBC driver licensing offices across BC. You can book an appointment online or walk in at most locations.

How Is the Class 4 Test Different from Class 5?

The Class 4 knowledge test covers all the same content as the Class 5 test — road signs, rules of the road, speed limits, intersections, parking, and safe driving practices — plus a significant additional layer of commercial passenger vehicle content unique to Class 4:

• Passenger safety and management — loading, unloading, disabled passengers, and conduct rules
• Driver conduct and professionalism — personal conduct, relationships with passengers, and legal obligations
• Vehicle pre-trip inspection — systematic inspection procedures before operating a commercial vehicle
• Fatigue and hours of service — federal and provincial rules on driving hours and mandatory rest
• Taxi and ride-share regulations — TNS licensing, insurance, and operational requirements
• Commercial vehicle insurance — ICBC requirements specific to Class 4 operations

What Study Materials Do I Need?

ICBC provides two official guides for Class 4 candidates:

1. Driving Commercial Vehicles — the primary study guide for Class 4. Covers all commercial passenger vehicle topics unique to Class 4. Download it free from the ICBC website or from our Class 4 practice test page.
2. Learn to Drive Smart — the standard BC driving manual covering Class 5 content. Class 4 candidates need both books since the test includes all Class 5 material. You can download it free on our site as well.

Who Needs a Class 4 Licence?

You need a Class 4 licence in BC to drive:

• Taxis and limousines
• Ride-share vehicles (Uber, Lyft) operating commercially
• Ambulances and emergency response vehicles (non-emergency transport)
• Special activity buses (school trips, sports teams)
• Vehicles carrying up to 24 passengers for hire or reward
• Some work-crew buses

If you are driving a privately-owned vehicle with passengers (friends, family) you do not need a Class 4. The requirement applies to commercial passenger transport only.

Class 4 Eligibility Requirements

To apply for a Class 4 licence in BC you must:

• Be at least 19 years old
• Hold a valid, full (non-learner, non-novice) Class 5 driver's licence
• Meet the medical and vision standards for Class 4
• Pass the Class 4 knowledge test
• Pass the Class 4 road test

Note: You must complete the Graduated Licensing Program (Class 7L and 7N) before you can hold a full Class 5, which is the prerequisite for Class 4.

How to Pass the Class 4 Knowledge Test

Most candidates who fail the Class 4 knowledge test do so on the commercial-specific topics — not the basic road rules they already know from Class 5. To pass on your first attempt:

1. Read the Driving Commercial Vehicles guide thoroughly. Focus on the chapters covering passenger safety, driver conduct, pre-trip inspection, and hours of service. These topics will not be in your memory from Class 5 preparation.
2. Review the Learn to Drive Smart manual road signs section. Road signs appear on every ICBC test. Even experienced drivers sometimes miss sign questions because they have never studied them formally.
3. Practice with knowledge test questions. Online practice questions let you test yourself before the real exam. Focus on Class 4-specific topics first, then do full mixed-topic practice sessions.
4. Take a mock exam under timed conditions. The knowledge test has a time limit. Practicing with a timer removes the anxiety of the clock on the real test day.

Frequently Asked Questions

How long does it take to get a Class 4 licence?

The knowledge test can be taken as soon as you hold a full Class 5 licence. After passing the knowledge test, you can schedule the road test, which is typically available within a few weeks depending on your location. The total process from first attempt to licence in hand is often 4–8 weeks.

Can I drive a taxi while waiting for my Class 4 road test?

No. You need both the Class 4 knowledge test pass and a valid Class 4 licence (after the road test) to legally operate a commercial passenger vehicle in BC.

Is the Class 4 road test harder than the Class 5?

The Class 4 road test is more comprehensive than Class 5. It includes all Class 5 driving skills plus commercial-specific assessments: passenger loading procedures, mirror checks at every stop, and professional driving conduct. Preparing with a driving instructor familiar with Class 4 requirements is strongly recommended.