My electric bill went up by about $80 the first month I got my electric car. Computing the cost is a bit tricky because I have tiered billing and I'm hitting the next higher tier since I got the car. My electric company (PG&E) does have an time-of-use billing plan tailored for EV, but, by my computations it didn't help a lot because we use A/C during the day:

https://www.pge.com/en_US/residential/solar-and-vehicles/opt...

If you charge at night and aren't home during the day, and your electric company has an EV plan, this might help.