In the long run, EVs are cheaper to run, maintain and service. Ongoing servicing costs can be a pain point for petrol and/or diesel-powered vehicles that have done more kilometres. Servicing an EV is comparatively easier, less frequent and cheaper than their petrol/diesel counterparts.
Further, the cost of using electricity to charge an EV is about 40% less than what you will spend on petrol if you use a similar vehicle over the same distance. You can learn more about the savings you can pocket if you own an EV through this calculator on the Electric Vehicle Council website.