What is the difference between trucking contract and spot rates?

Contractual rate agreements vary in length and are customized between shippers, brokers and carriers, but they tend to average three to six months in duration. As trucking market volatility increases, contractual agreements tend to go through a rebidding process by either the shipper or the transportation provider depending on which way spot rates move. 

Contract trucking rates are heavily influenced by recent spot market movements. If spot rates are currently above contract rates, there tends to be upward pressure on current and future contractual rates for as long as this relationship holds. Said differently, spot market rates are a leading indicator for contract rates both to the upside and the downside. In this sense, current contract rates can be thought of as spot rates from the relatively recent past. FreightWaves’ survey data indicates that when spot and contract rates diverge by more than 10% (on a per mile basis) for a one- to three-month period, new contractual agreements are often negotiated in order to mark-to-market the purchased cost of transportation.

Spot rates

Spot rates, which make up the remaining 20% of the trucking market, are based on the current supply and demand for trucks and are for one-time or inconsistent load volumes for specific origins and destinations. The spot market is significantly more volatile than the contract market because spot trucking rates are negotiated on a lane-by-lane, load-by-load basis and load specifications can vary wildly. Spot market loads are often same-day loads from shippers who offer loads at inconsistent times or on low traffic, inconsistent lanes. 

An example of a spot market rate would be for a custom equipment manufacturer that ships its custom-designed and fabricated equipment to job sites across the United States. In such a scenario, the volumes are low, timing is inconsistent and the destinations vary. When the equipment is ready for delivery, it then has to be matched with a truck on short notice. The shipper will then purchase the trucking capacity on the spot market and will pay spot rates. 

Spot market rates are determined by the ratio of the number of loads in the market compared to the number of trucks available to move this freight. When load volumes are high and truck capacity is tight, spot rates tend to rise. Conversely, when load volumes are falling and truck capacity increases (or is held constant), spot rates tend to decline. 

Every trucking market can be highly volatile when measured across hours, days and weeks because inbound and outbound freight volumes are dynamic and nonlinear.

Some final factors to consider that often impact both contract and spot rates include the type of commodity being transported (high or low value), the delivery time frame (faster is more expensive), the weight of the freight (heavier is more expensive), the specialization required by the carrier (e.g. transporting wind turbines) and whether the freight is being delivered into a headhaul or backhaul market. The latter characteristic influences pricing per mile as delivering freight into headhaul markets costs less because it is much easier for a carrier to obtain a load after delivery of the original load. On the contrary, delivering freight into a backhaul market is more expensive because carriers often have trouble finding a return load and must deadhead empty miles on the way to their next load. 

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