Most new electric cars will require a 2-year first service to maintain the car's warranty and servicing costs are normally lower than the costs for a combustion car. You can also opt for a service plan when taking out a lease which is a small monthly cost on top of your lease.
After the first 3-years of owning an EV you will be required to get an MOT and then for each year after. But there are so few moving parts on an electric car that were will be no combustion car parts to replace.
The regenerative braking will also mean you have dramatically less brake pad and disc wear, meaning your brakes will last twice to three times as long.
EV owners have been around for as long as 10 years now and can in 90% of cases vouch for the affordability of servicing of EVs. There's really so much less to go wrong on them.