Doubles and Triples Endorsement Costs Vary by State
A doubles endorsement allows you to haul two trailers behind a single tractor; a triples endorsement allows three. The cost of adding either one to your commercial driver's license (CDL) depends entirely on your state. Some states charge a flat fee between $10 and $50 to add the endorsement to an existing CDL. Other states bundle the endorsement fee into their renewal cost or charge nothing extra at all. A few states do not offer triples endorsements at all, or restrict them to specific routes or conditions.
The endorsement itself is not a separate license — it is a notation added to your existing CDL. You cannot buy it without already holding a valid CDL with a Class A or Class B designation. The fee covers the administrative cost of updating your record and, in some states, the written test you must pass to prove you understand the handling and braking requirements of pulling multiple trailers.
Key Takeaways
- Doubles and triples endorsement fees range from $0 to $50 depending on your state, with most states charging between $10 and $30.
- You must already hold a valid Class A or Class B commercial driver's license before you can add either endorsement.
- Most states require you to pass a written test covering multi-trailer handling, braking, and safety before the endorsement is issued.
- Some states charge the endorsement fee only at renewal time, while others allow you to add it between renewals for a separate fee.
- A handful of states do not offer triples endorsements, and a few restrict them to certain highways or weather conditions.
How State Fees Break Down
States fall into three general categories. The first group charges a small one-time fee to add the endorsement to your existing CDL. California, for example, charges $15 to add a doubles endorsement and $20 to add a triples endorsement. Texas charges $20 for either one. Florida charges $10 for doubles and $15 for triples. These fees are separate from your CDL renewal fee and can usually be paid at any time during your license validity period.
The second group includes states that do not charge a separate endorsement fee at all. Some of these states cover the cost in your regular CDL renewal fee; others straightforward do not charge for the endorsement. Idaho, for instance, does not charge extra for doubles or triples. Montana charges no separate fee for doubles but does charge for triples. You will need to check your specific state's Department of Motor Vehicles website or call their commercial driver's license section to confirm whether your state falls into this category.
The third group includes states that restrict triples endorsements or do not offer them. Some states allow doubles but not triples. Others allow triples only on certain interstate highways or during daylight hours. A few states, including Hawaii and some northeastern states, do not issue triples endorsements under any circumstances. If you plan to haul triples, you must first confirm that your state permits it and under what conditions.
Testing Requirements and What They Cover
Most states require you to pass a written test before the endorsement is added to your license. The test covers the mechanics of handling multiple trailers, including how weight distribution changes with each additional trailer, how braking systems work on multi-trailer rigs, and how to perform pre-trip inspections on all trailers. Some states also test your knowledge of state-specific regulations governing doubles and triples, such as length limits, weight limits, or restricted routes.
The test is usually administered at the same location where you renew or modify your CDL — typically your state's DMV or a third-party testing facility. You do not need to take a separate road test for the endorsement in most states; the written test is the only requirement. A few states do require a skills test or observation period, but this is uncommon. The test fee, if charged separately, is usually included in the endorsement fee or is waived if your state does not charge for the endorsement itself.
When You Can Add the Endorsement
You can add a doubles or triples endorsement to your CDL at any time during your license validity period in most states. You do not have to wait until your renewal date. This means if you obtain a new job that requires hauling doubles or triples, you can add the endorsement within days or weeks rather than waiting months. The process typically takes a few minutes at your local DMV office, though some states allow you to mail in the request with payment and your test results.
A few states require you to add the endorsement only at renewal time. If your state follows this rule, you will have to wait until your CDL renewal date to add it, unless you choose to renew early. Check your state's rules before you plan around a job start date, because missing this detail can delay your ability to work.
Comparing Doubles and Triples Endorsement Fees by Region
| State or Region | Doubles Fee | Triples Fee | Notes |
|---|---|---|---|
| California | $15 | $20 | Separate from renewal fee; can add anytime |
| Texas | $20 | $20 | Same fee for both; paid at DMV |
| Florida | $10 | $15 | Lower fees; separate from renewal |
| Idaho | No charge | No charge | Both endorsements free |
| Montana | No charge | Fee varies | Doubles free; triples charged |
| Hawaii | Not offered | Not offered | Neither endorsement available |
This table shows a sample of state fees as of the most recent update, but fees change periodically and vary widely. The best way to find your state's current fee is to visit your state's Department of Motor Vehicles website or call their commercial driver's license section directly. Many states post their fee schedules online, and staff can confirm whether your state charges for the endorsement and what the current amount is.
What Happens If You Haul Doubles or Triples Without the Endorsement
Operating a vehicle with multiple trailers without the proper endorsement on your CDL is a violation in every state. Penalties vary but typically include fines ranging from $100 to $500 or more, depending on the state and whether it is a first offense. In some states, you may also face points on your driving record, suspension of your CDL, or both. Law enforcement can check your endorsements during a traffic stop or at a weigh station.
Beyond legal penalties, operating without the endorsement can affect your insurance coverage. If you are involved in an accident while hauling doubles or triples without the endorsement, your insurance company may deny your claim, leaving you personally liable for damages. Employers are also aware of this risk and will not hire you to haul multiple trailers without proof of the endorsement on your license.
Frequently Asked Questions
Do I need a doubles endorsement if I haul a tractor with one trailer and a dolly?
It depends on your state's definition. Some states consider a tractor-trailer-dolly combination a doubles setup and require the endorsement. Others do not. Check your state's DMV website or call their commercial driver's license section to confirm whether your specific configuration requires the endorsement.
Can I add both doubles and triples endorsements at the same time?
Yes. Most states allow you to add both endorsements in a single visit to the DMV. You will typically take one written test that covers both, and pay a combined fee if your state charges separately. Some states charge one fee for both endorsements; others charge separately for each.
What if I move to a different state after getting a doubles or triples endorsement?
Your current endorsement remains valid on your out-of-state license while you are driving. When you renew or transfer your license to your new state, you will need to meet that state's requirements for the endorsement. Some states recognize endorsements from other states automatically; others require you to pass their written test again.
Is there a written test I have to pass to get the endorsement?
Most states require a written test covering multi-trailer handling, braking systems, and safety procedures. A few states do not test for doubles but do test for triples. Some states with no endorsement fee also waive the test. Your state's DMV can tell you whether a test is required and what it covers.
How long does it take to add the endorsement to my license?
If you visit your DMV in person and pass the test, the endorsement is usually added to your license the same day or within a few business days. If you mail in your request, it may take one to two weeks. Some states offer expedited processing for an additional fee.