Mass accretion rate vs. stellar mass for the Chamaeleon I sample presented by Manara et al. (2023) (blue dots) and the Chamaeleon I sample analyzed in this work. Objects that have an accretion luminosity lower than the criterion given in Eq. (6) are marked with a red dot. The limits we derived based on the uncertainties on the chromospheric emission are shown with the blue, orange, and green lines for 1.2, 3, and 6 Myr old objects respectively. The red errorbars indicate the uncertainties on the stellar mass and mass accretion rate. The gray arrows indicate sources listed as upper limits by Manara et al. (2023).