An apparatus for determining stress profiles of motor vehicles, in particular of motor vehicles of a vehicle fleet, including at least one driving state determination apparatus disposed in a motor vehicle, the driving state determination apparatus being configured to repeatedly determine at least one driving state parameter of the motor vehicle and transfer it to at least one driving state evaluation apparatus; at least one driving state evaluation apparatus that is configured to assign a numerical stress parameter to each driving state parameter determined by the driving state determination apparatus; and an addition apparatus that is configured to add up the numerical stress parameters of a motor vehicle to yield a numerical total stress parameter.