The operational leasing contract specifies a price per kilometre. The kilometre adjustment is always made when a contract ends. The adjustment value is calculated by making a comparison between the kilometres contracted upon contract termination and those traveled on said date. So, the surcharge amount (amount payable per extra km traveled) or deduction (amount receivable per km not traveled) is multiplied by the difference between the kilometres contracted and traveled.
For example, your contract includes 25.000 kilometres with a duration of 30 months:
If, as at the contract termination date, in other words, after 30 months, it is observed that you have traveled a total of 30.000 km, it means 5.000 km more (+20%) than those initially contracted, if the price per extra kilometre is, for example, € 0.05, when multiplying by the difference in kilometres, it would have a cost of € 250 (5.000 km x € 0.05). If the extra kilometres traveled exceeds 25% over and above those initially stipulated, the surcharge cost per extra km increases by 50%.
if you travel less kilometres than those initially contracted, you will receive the deduction amount per km not traveled multiplied by the difference in kilometres, up to a maximum of 25% of the kilometres billed. If upon the contract termination date, it is observed that you have traveled a total of 20.000 km, 5.000 km less (-20%) than those initially contracted, if the price per kilometre deducted is, for example, € 0.02, when multiplying by the difference in kilometres, you would receive € 100 (5.000 km x € 0.02).
These values are provided by way of example, you must always confirm the surcharge and deduction amounts under your contractual conditions.
However, at any time of the contract, you may request an update of the terms of your contract by way of a recalculation, and adjust the number of kilometres owed to a significant deviation in them, with the respective rectification of the monthly fee amount. As from a deviation of 15% you are recommended to do so as in this way you will avoid any unexpected costs at the end of the contract.