Check your current Fuel Levy Rate with the Freight Metrics Fuel Levy Calculator. A fuel levy or surcharge is an additional fee on top of the base freight price, used to visibly adjust the total freight cost with fuel cost fluctuations. A fuel levy (fuel surcharge) is the fuel portion cost of the total freight value which is adjusted upwards or downwards based directly on fuel costs without having to re-address the agreed freight rate and freight terms with each fuel price change.