Whenever cars come up lately, the question everyone argues about is: gas car or EV for commuting? EV fans say "a penny per mile," gas-car fans say "EVs save fuel but cost more overall, and resale value tanks." Both sides have a point — but both are telling only half the story. What actually decides it isn't any single liter of gas or kilowatt of electricity; it's the full five-year commuting bill. This guide takes no side — it just does the math.
First, the Hard Cost: How Big Is the Fuel-vs-Electricity Gap?
Energy is the biggest line item in commuting costs. Take a daily round trip of 40 km and roughly 250 commuting days a year — about 10,000 km annually. Assume a gas car that uses 7 L/100 km and gas at $1.1/L: run it through the fuel calculator and you get about $770 a year in gas, roughly $3,850 over five years. An EV using 15 kWh/100 km, with home charging at night at $0.055/kWh and public chargers around $0.17/kWh, at a realistic blended $0.085/kWh, costs about $130 a year — roughly $650 over five years. On energy alone, the EV saves about $3,200 over five years, the most straightforward and least disputed part of the whole gas-vs-EV debate.
But there's a precondition: that electricity price assumes home charging is your primary source. If you have no fixed parking spot and rely entirely on public fast charging, the cost jumps to near $0.21/kWh, and the five-year electricity bill becomes about $1,600 — cutting the advantage in half. So the first question in "is an EV cheaper" isn't about the car at all, it's: "can you install a home charger?"
Beyond Energy: The Full-Cycle Bill of Maintenance, Insurance, and Resale
| Item | Gas car (5 yrs) | EV (5 yrs) |
|---|---|---|
| Energy | ≈$3,850 | ≈$650 (home charging) |
| Maintenance | ≈$1,100 (oil, filters, spark plugs) | ≈$400 (mostly battery/motor checks) |
| Insurance | ≈$2,500 | ≈$2,900 (usually higher at same price point) |
| Resale depreciation | ≈$4,100 (≈50% retained value) | ≈$6,200 (≈35% retained value) |
| Total | ≈$11,550 | ≈$10,150 |
Put maintenance, insurance, and resale value on the table and the gap narrows dramatically: the EV's five-year advantage drops to roughly $1,400, and that advantage grows the more you drive. If you drive only 5,000 km a year, the fuel savings barely offset the resale hit and the EV stops making sense; at 20,000 km a year or more, the EV's energy advantage becomes very substantial.
When an EV Wins, and When a Gas Car Is the Smarter Pick
Put together, the conclusion can be compressed into one sentence: drive a lot, have home charging, and plan to keep it long — the EV saves; drive little, rely on public chargers, or trade in every few years — the gas car is steadier. Concretely:
- 15,000+ km/year with home charging: the EV's energy edge scales up, saving $2,000-$3,500 over five years
- Under 8,000 km/year: the fuel difference is small — a gas car is simpler and dodges resale risk
- Long highway trips: gas refuels in minutes with no range anxiety; EV charging queues can eat the money you saved
- Trading in within 3 years: EVs depreciate faster in the short term; gas retains value better
One more dimension people overlook: time cost. Five minutes at a gas station weekly versus hunting for and queuing at a public charger is dozens of hours a year. If your time is valuable, that's a cost too.
Calibrate with Your Salary: Keep Commuting Cost in Proportion
Whatever you drive, commuting costs should stay in a sane range — "saving money" isn't the whole goal. A practical rule of thumb: keep monthly commuting energy costs at or below 5%-8% of take-home pay. On a salary of ¥10,000 a month, keep commuting energy under ¥500-800; if it's above that, it's time to rethink your commute or your address. Use the salary calculator to work out your actual monthly take-home, then compare it against your gas or electricity bill to see whether the current setup is quietly weighing you down.
Buying a car is consumption, not investment — the right choice is the one that fits your life. Before you decide, open the fuel calculator and compute your real monthly fuel bill with your actual consumption and gas price, then estimate your home-charging situation and annual mileage. Put those two numbers side by side and the gas-vs-EV answer tends to reveal itself. Don't get swayed by the "a penny a mile" or "EVs save fuel but not money" one-liners — your bill is decided by your mileage alone.