CDL Tanker Vehicles Endorsement
The Tanker endorsement is required to drive any commercial vehicle that transports liquid or gaseous materials in a tank with an individual capacity of more than 119 gallons and an aggregate capacity of 1,000 gallons or more. This covers milk tankers, fuel delivery trucks, water haulers, and chemical transport vehicles. Tanker driving requires unique skills due to liquid surge and rollover risks.
Requirements
What you need to qualify for and obtain the Tanker Vehicles (N) endorsement.
CDL Test Study Topics
Focus your study time on these key knowledge areas for the N endorsement written test.
- Liquid surge effect and how it affects vehicle handling
- Tanker vehicle inspection procedures
- Baffled vs. unbaffled vs. bulkhead tanks
- Safe following distances with liquid loads
- Emergency procedures for tanker spills and leaks
- Weight distribution and center of gravity in tanker vehicles
Jobs That Require the N Endorsement
Earning Potential
Annual Pay Boost
+$3,000 - $10,000/year
Demand Level
High
Drivers with the N endorsement earn +$3,000 - $10,000/year more annually than non-endorsed CDL holders. The high demand ensures consistent job availability and strong negotiating leverage.
Top States for N-Endorsed Drivers
These states have the highest demand for drivers with the Tanker Vehicles endorsement.
Frequently Asked Questions
How hard is the Tanker endorsement test?
The Tanker written test is considered moderate difficulty. It covers liquid surge, tank types, inspection procedures, and safe driving techniques. Most drivers pass on their first attempt after studying the tanker section of their state CDL manual for 2-3 hours.
Do I need the Tanker endorsement for all liquid loads?
Yes, if the tank capacity exceeds 119 gallons individually or 1,000 gallons in aggregate. This includes milk trucks, fuel delivery, water haulers, and chemical tankers. Small portable tanks under these thresholds do not require the endorsement.
Should I get both Tanker and HazMat endorsements?
Yes, if possible. Combining Tanker (N) and HazMat (H) gives you the X endorsement, which is the highest-paying endorsement combination in trucking. Fuel tanker and chemical transport jobs require both and pay $8,000-$20,000 more annually.