The Volatile Cost of Movement
In the logistics industry, fuel is the most volatile expense. To protect themselves from price spikes, carriers use "Fuel Surcharges" (FSC)—a fee that fluctuates based on national fuel price averages.
How the Index Works
Most FSC programs are based on a "Base Fuel Price." If the current price of diesel is above that base, a surcharge percentage is applied to the base freight rate. This allows the carrier to keep their base rates stable regardless of the price of oil.
Standard FSC Calculation
If the base rate is $2.00/mile and the FSC is 25%, the shipper pays $2.50/mile. As fuel prices go up, that 25% might jump to 40%.
Why It Matters for Your Supply Chain
If you are a shipper, failing to account for FSC fluctuations can lead to massive budget overruns. In 2026, many companies are moving toward "Fuel Capping" agreements to provide more financial predictability.
Conclusion
Logistics is a game of margins. Use our Fuel Surcharge calculator to verify carrier quotes and project your shipping costs for the next quarter.