Maintenance costs might be lower for EVs, although as someone who gets his hands dirty on his ICE car I doubt it's going to be significant; most of the time I'm fixing stuff EVs also have (brakes, suspension, sensors, tires, paint damage, lights, wiper blades and fluid, trunk gas struts, indicator stalk, washing the car etc.). I'm also hearing from colleagues of decreased lifetime esp. on brakes of EVs since they get used too infrequently because of regenerative braking, so they get stuck due to rust.

But my point wasn't that but this: using your EV as a taxi will increase maintenance costs (and depreciation) vs. leaving it in the garage.