What a Class DZ Learner's Permit Lets You Do

A Class DZ learner's permit in Ontario allows you to learn to drive a heavy truck (a vehicle over 11,794 kilograms) under supervision. You cannot drive alone. You must have a fully licensed Class DZ driver in the vehicle with you at all times, sitting in the front seat beside you. The permit is your first step toward a full Class DZ licence, which takes most people several months to complete.

The DZ class covers tractor-trailers, dump trucks, cement mixers, and other heavy commercial vehicles. If you want to drive these vehicles for work, you need to start with the learner's permit. Ontario's DriveTest centres issue the permit after you pass a written knowledge test.

Key Takeaways

  • You must be at least 18 years old and hold a valid Ontario driver's licence (Class G or higher) before you can get a Class DZ learner's permit.
  • The written test covers heavy truck operation, air brake systems, cargo handling, and road safety specific to large vehicles.
  • You pay a fee to DriveTest when you book your test; the amount varies but is set by the province.
  • Once you pass the written test, your permit is valid for two years, during which you must complete the full licensing process.
  • You must always have a fully licensed Class DZ driver supervising you while you drive with the learner's permit.

Age and Licence Requirements to Start

You must be at least 18 years old. You also must already hold a valid Ontario driver's licence — Class G, G2, or any other class. You cannot get a DZ learner's permit if you do not have an active Ontario licence in your name. If your licence is suspended, cancelled, or expired, you need to renew or restore it first.

Your existing licence must be in good standing. If you have unpaid fines, outstanding suspensions, or a medical suspension on your record, ServiceOntario or DriveTest will flag this when you try to book your test. Clearing these issues comes before you can move forward.

What You Need to Bring to the Test Centre

Bring your valid Ontario driver's licence (the photo card itself, not a copy). You will also need proof of your Ontario address — a utility bill, lease, or bank statement dated within the last three months works. Bring the original document, not a photocopy.

You do not need to bring a vehicle or a supervising driver to the test centre. The written test happens in a testing room at DriveTest. You will sit at a computer or answer questions on paper, depending on the centre. The test takes about 30 to 45 minutes.

The Written Knowledge Test: What to Study

The test has 50 multiple-choice questions. You need to score at least 80 percent to pass (40 out of 50 correct). The questions cover topics specific to heavy trucks: air brake systems, how to inspect a truck before driving, load securement, stopping distances at different speeds, and how weather affects handling a heavy vehicle.

Ontario publishes a free study guide called the Official MTO Class DZ Knowledge Test Study Guide, available on the ServiceOntario website. It contains sample questions and explains the rules you need to know. Many people study this guide for two to four weeks before taking the test. You can also take practice tests online through some driving schools, though these are not official.

The test is written in English. If English is not your first language, you can request an interpreter at the test centre when you book, though availability varies by location.

How to Book Your Test and Pay the Fee

You book your written test through DriveTest's online portal or by calling 1-888-570-6110. You choose your preferred test centre and date. Test centres are located in most Ontario cities; rural areas may have fewer options, so booking ahead is wise if you live outside a major city.

You pay the test fee when you book. The fee is set by the province and changes periodically; as of recent years it has been in the range of $50 to $60, but you should confirm the current amount when you book. Payment is by credit or debit card online, or by phone if you call to book.

Once you book, you will receive a confirmation email with your test date, time, and centre location. Arrive 15 minutes early. Bring the confirmation email or print it out, along with your licence and address proof.

What Happens After You Pass

If you pass the written test, DriveTest issues your Class DZ learner's permit on the spot or mails it to you within a few business days, depending on the centre. Your permit is valid for two years from the date it is issued. During this time, you must complete the next steps: a road test with a certified examiner and, in some cases, an air brake test.

While you hold the learner's permit, you can only drive a heavy truck if a fully licensed Class DZ driver is with you. That driver must be at least 21 years old and sitting in the front seat. You cannot drive on certain highways or in certain conditions (such as at night) depending on Ontario's rules for learner's permits — check the current restrictions when you receive your permit.

Many people work with a driving school that specializes in heavy truck training. These schools provide the supervising driver during practice and can prepare you for the road test. The cost varies widely depending on the school and how many hours of training you book.

If You Fail the Written Test

You can retake the written test. There is no waiting period — you can book another test when ready if you wish, though most people study for a week or two before trying again. Each attempt costs the same fee. You can take the test as many times as you need until you pass.

If you fail, DriveTest will tell you which topic areas you scored lowest on. Use that feedback to focus your studying. The official study guide breaks down each topic, so you can review the sections where you struggled.

Frequently Asked Questions

Can I get a DZ learner's permit if my Ontario licence is suspended?

No. Your licence must be valid and in good standing. If it is suspended for any reason — unpaid fines, medical reasons, or a driving violation — you must resolve the suspension first. Contact ServiceOntario or the Ministry of Transportation to clear the suspension before booking your DZ test.

How long does the DZ learner's permit stay valid?

Your permit is valid for two years from the date it is issued. During that time, you must pass the road test and any other required tests to move toward a full Class DZ licence. If your two years expire before you complete the road test, your permit lapses and you must retake the written test.

Do I need to take an air brake test as well as the written test?

The written test is required for everyone. An air brake test is required only if you want to drive a truck with air brakes. If you plan to drive only trucks with hydraulic brakes, you may not need the air brake test — but most heavy trucks use air brakes, so most people take both. Confirm with DriveTest or your driving school which tests you need.

Can I use my learner's permit to drive a heavy truck for work?

No. A learner's permit is for learning only. You must have a fully licensed Class DZ driver supervising you. You cannot be paid to drive while you hold only the learner's permit. Once you pass your road test and receive your full Class DZ licence, you can drive commercially.

What if I took my DZ test in another province — do I need to retake it in Ontario?

If you hold a valid Class DZ licence from another Canadian province, you may be able to convert it to an Ontario licence without retaking the test. Contact ServiceOntario to ask about interprovincial licence recognition. If you hold a learner's permit from another province, the rules are stricter — you may need to retake Ontario's written test.