A fuel truck that sits at the rack for three hours does not stop costing money. The driver is on the clock, the tractor and trailer are paid for, and the next load is later. Detention pay is how a carrier gets some of that back, but only if the terms exist before the load.
The math is the same whether you haul for a supplier or a buyer, and a wait at the customer’s tank works the same way as one at the rack.
What is detention pay in fuel trucking?
Detention pay is a fee a carrier charges when a truck waits past an agreed free time at pickup or delivery. The U.S. DOT Office of Inspector General’s 2018 report on driver detention describes how detention is measured: time spent at a shipper or receiver’s facility beyond the limit established in shipping contracts. It separates that from dwell time, the total time a truck spends at a facility.
Two parts make a detention term: free time (the hours the rate already covers) and an hourly rate for every hour after. If either is missing, there is nothing to invoice.
In fuel, the facility is usually a terminal rack. It can also be the customer’s site, where a driver waits for a tank to be gauged or for someone to unlock a gate.
Why does the rack line cost more than it looks?
Each hour in the rack line costs you the whole truck’s hourly cost, including the driver’s wage. Lines form when several trucks arrive for the same product, a loading arm is down, or a loading number is not ready when the truck gets there. Each of those delays is real money to you and invisible to whoever set the rate.
The OIG report put national numbers on the problem, with a caveat. It found no industrywide detention-time figure because accurate data do not exist. What it did estimate:
- A 15-minute increase in average dwell time increases the average expected crash rate by 6.2 percent.
- Detention is associated with reductions in annual earnings of $1.1 billion to $1.3 billion for for-hire truckload drivers.
- For truckload motor carriers, detention reduces net income by $250.6 million to $302.9 million a year.
Those are truckload figures for the whole industry, not fuel tankers. Use them as a reason to price waiting, not as a rate.
How much does an hour at the rack cost you?
Take your all-in hourly cost for a truck and driver and multiply by the hours waited. The numbers below are illustrative, not market rates or customer data. Say you haul 8,000 gallons for a flat $600, and your truck-and-driver cost is $90 an hour. The shipping terms give 2 hours of free time and a $60 detention rate. The truck waits 3 hours.
| Line | Dollars | Cents per gallon (8,000 gal) |
|---|---|---|
| Your cost of the wait (3 hours x $90) | $270 | 3.375 |
| Detention billed (1 hour past free time x $60) | $60 | 0.750 |
| Cost of the wait not recovered ($270 - $60) | $210 | 2.625 |
Even with a detention term, this load is out $210 for the wait, 35% of the $600 haul. The two free hours cost you $180 and the billable hour costs $90 against $60 billed. Free time is only paid for if your base rate prices it in, and a detention rate below your hourly cost only slows the loss.
Add the cost of the wait to your normal haul math. Fuel hauling rates from per mile to per gallon walks through the conversion, and the freight cost per gallon calculator runs your own figures.
Who bills whom when a truck waits?
Detention is billed along the contract chain, so the party that can bill you is the party you have a contract with. This table shows a common shape. Your agreements decide the real answer.
| Party | Who it can bill | Who can bill it | What to check |
|---|---|---|---|
| Carrier | The party that hired it: a supplier, a buyer or a broker | Nobody downstream, unless it hired a sub-hauler | Free time and hourly rate in the rate confirmation or hauling agreement |
| Supplier | Often the buyer, through delivered price terms | The carrier, if the supplier hired it | Whether the supplier pays you for waits it did not cause |
| Terminal | Not a detention party; its terms are with the supplier or account holder that loads there | Usually not the carrier directly | Whether the terminal keeps wait times at all |
| Buyer | Rarely anyone; it is at the end of the chain | The carrier or supplier, if its site holds the truck | Who owns the delivery appointment |
Two things follow. First, if you haul on a carded terminal under the supplier’s account, the terminal is still not your counterparty for rack waits. The party that hired you is, whether that is the supplier or the buyer. Second, if a broker is in the middle, the broker’s term with the shipper may differ from yours. Ask whether detention flows through, and see how fuel brokers get paid before you assume it does.
How do you prove the wait?
Record the arrival time and the time the truck left, and keep it where the other side can see it. Whoever tracks the truck, usually the dispatcher, should log both times as they happen. A claim with no timestamps is hard to argue.
- Time in at the gate and time out of the rack, from the driver, in writing.
- The product, terminal and loading number on the load.
- The ticket from the rack, with how to read a fuel delivery ticket as a reference for the fields.
- Anything that explains the delay: an arm down, a product outage, a missing authorization.
Send the claim with the invoice, not months later.
What should the terms say?
Put five items in the rate confirmation or hauling agreement before the first load.
- Free time: hours included at the rack and at the drop, counted from arrival.
- Rate: dollars an hour after free time, and whether it is prorated by the quarter hour.
- Clock: which timestamp starts and stops it.
- Cause: whether delays outside the carrier’s control, like a product outage, still count.
- Cap and notice: any maximum, and how fast you must claim.
When you compare quotes from different carriers, include these in the comparison. How to compare bulk fuel quotes covers the other line items. A low per-mile price with generous free time and no detention rate can cost more than a higher price that has one.
How Energy Connect handles it
Energy Connect is a load board and marketplace. Carriers can bid on a posted load, and the poster can accept or decline each bid. A bid quoted as a freight rate can also be countered; a bid priced off an index or terminal can only be accepted or declined. Agree free time and your detention rate with the poster before the load, at the same time as the freight rate.