A diesel surcharge is a variable fee added to transportation and logistics service charges to compensate carriers and logistics providers for fluctuations in diesel fuel costs. This supplemental charge is calculated separately from the base freight rate and adjusts periodically—typically weekly or monthly—based on current diesel fuel prices as measured against a predetermined baseline price. The surcharge serves as a cost-recovery mechanism that protects transportation providers from the financial impact of volatile fuel markets while maintaining predictable base pricing structures for core logistics services.
