Fuel Surcharge Calculator
Calculate commercial freight and parcel fuel surcharges using indexed carrier benchmark tables pegged to US Energy Information Administration (EIA) national diesel prices.
Diesel Price Index & Peg Table
Total Freight Bill
$1,710.00
Base + Fuel Surcharge
Fuel Surcharge ($)
$210.00
14.0% surcharge rate
Diesel Price Delta
+$1.40 / gal
Above $2.50 base peg
Indexing Step Count
28 steps
0.5% per $0.05 step
Fuel Surcharge Index Formula
Surcharge \% = \left\lfloor \frac{\text{Current Diesel Price} - \text{Baseline Peg Price}}{\text{Step Interval}} \right\rfloor \times \text{Step Surcharge \%}- Current Diesel Price: Weekly US Department of Energy / EIA national retail on-highway diesel average.
- Baseline Peg Price: Contract base threshold below which no fuel surcharge is assessed (typically \$2.00 to \$2.50/gal).
- Step Interval: Price increment (usually \$0.05/gallon) triggering each step increase.
- Step Surcharge: Percentage added per interval (e.g. 0.5% linehaul per 5-cent diesel rise).
Step-by-Step Worked Example
Calculation Steps:
- Price Delta Above Peg = \$3.90 - \$2.50 = \$1.40 / gallon
- Number of 5-Cent Steps = \$1.40 / \$0.05 = 28 steps
- Calculated Surcharge Percentage = 28 × 0.5% = 14.0%
- Fuel Surcharge Dollar Amount = \$1,500.00 × 0.14 = \$210.00
- Total Adjusted Freight Bill = \$1,500.00 + \$210.00 = \$1,710.00
How to Use This Calculator
- 1Enter your base freight linehaul charge.
- 2Input the current national or regional average diesel fuel price.
- 3Enter your carrier contract baseline peg price (default \$2.50/gal).
- 4Review the calculated fuel surcharge percentage and total adjusted freight charge.
Assumptions & Limitations
- Diesel prices reflect standard US On-Highway Retail Diesel Prices published by the EIA.
- Surcharge applies strictly to base linehaul charges unless accessorial indexing is contractually agreed.
Frequently Asked Questions
How often do carrier fuel surcharges change?
Major freight and parcel carriers adjust their fuel surcharge percentages weekly on Mondays or Wednesdays, directly tied to the diesel price index published by the US Energy Information Administration.
What is a diesel fuel peg in freight contracts?
The fuel peg is the baseline diesel price (e.g. \$2.50/gal) built into the carrier’s core linehaul rate. When fuel prices rise above the peg, a surcharge activates to protect carrier operating margins.
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