One of the biggest savings, we realized, was on maintenance. We've had our Fiat 500e for a little over a year, and our total maintenance cost has been... zero. We had to take it into the dealership once, for a software upgrade, and they rotated the tires while we were there (all at no cost). We would normally have had to change the wiper blades, but (unfortunately) there hasn't been any rain here in California. We'll eventually have to change the tires - but probably not before the end of our 3-year lease.
The biggest reason, IMHO, that the car companies and dealerships aren't keen on having us all switch to EVs is that their business model is built on the profit they make from parts and service. Remember, with EVs there are no spark plugs to replace, no oil filters or air filters or fuel injectors or radiators or fan belts or the zillion other things you just have to replace on a regular basis in a gas car.
And did I mention that EVs are WAY more fun to drive?
People also ask us how much it costs to charge the car. We mostly plug in at home, using just a 110v plug, so we incurred no EVSE (aka charging station) installation charges. The additional electricity cost is roughly equivalent to the cost of plugging in an additional fridge.
A few things you need to know to complete the spreadsheet:
* State rebates vary - a lot - by state. California's current rebate is $2500. Our dealer did the paperwork for us, and we received our rebate within a couple of months. (I've heard that there have been backlogs in CA, but we didn't experience one.) Check out this awesome map to find out what rebates your state has available.
* The Federal government offers a $7500 rebate for most EVs, but this is only available for car sales. (For leasing, the dealer gets the federal rebate and usually rolls that into the cost of the lease.) State rebates are only available for 3-year leases (at least in California). But again - the monthly cost of a two-year lease is often lower because it includes the state rebate.
* I entered $20/month into the spreadsheet as the cost of public charging - which is approximately what we pay, using public chargers for maybe 20% of our charging needs. Your costs may vary. You can find more information on charging rates at Chargepoint and NRG-eVgo and BLiNK. You can find a map of the many charging stations now available at PlugShare.
* I included a section for car-sharing. We share an old Prius with two other families, in order to have access to a long-range gas car - or a second car - on the rare occasions when we need one. (Our lease with Fiat also includes 12 free days of car rentals per year.) We regularly drive our EV from Palo Alto to San Francisco and Berkeley. (I've also driven it as far as Monterey and Sonoma.) We have only needed a gas car about a dozen times over the past year - usually because we just needed two cars on the same day (a problem that would be solved with better public transit).
Questions? Comments? Please let me know what you think!