10-Year TCO Scoreboard: EV Wins by $8,250 With Tax Credit, $750 Without
We ran the full 10-year total cost of ownership for a representative pairing — a $42K EV vs a $30K gas car of similar size and feature set, both driven 15,000 miles/year for a decade. Here’s where the money actually goes.
The full TCO breakdown
| Cost category | Gas car | EV | EV advantage |
|---|---|---|---|
| Purchase price | $30,000 | $42,000 | −$12,000 |
| US federal tax credit | — | −$7,500 | +$7,500 |
| Fuel (10 yr × 150K mi) | $17,500 | $6,000 | +$11,500 |
| Maintenance | $6,000 | $3,000 | +$3,000 |
| Insurance | $15,000 | $18,750 | −$3,750 |
| Resale value at year 10 | −$6,500 | −$8,500 | +$2,000 |
| 10-year total cost | $62,000 | $53,750 | +$8,250 |
The headline: with the tax credit, EV wins by $8,250 over 10 years. Without the credit, the gap shrinks to roughly $750 — well within the noise of any specific person’s actual rates.
Where each line comes from
Purchase + tax credit. EV starts $12K above the gas car. Tax credit (where applicable) cuts effective premium to $4,500. Without the credit (you don’t qualify, your specific EV doesn’t qualify, or the program changes), the full $12K gap stands.
Fuel. Gas car at 30 MPG × $3.50/gal × 150,000 miles = $17,500. EV at 3.5 mi/kWh × $0.14/kWh × 150,000 miles = $6,000. The $11,500 savings is the EV’s biggest TCO advantage — and the input most sensitive to your specific situation.
If you charge primarily at home overnight: $0.10-$0.15/kWh, EV stays cheap. If you charge primarily at public DC fast chargers: $0.30-$0.45/kWh, fuel cost climbs to $13,000-$18,000 — gas car wins on fuel.
Maintenance. Gas car: oil changes ($1,500), brake pads/rotors ($1,800), spark plugs/belts ($700), transmission service ($300), miscellaneous (~$2,000) = ~$6,000-$7,000. EV: tires ($1,800), brake fluid ($200), cabin filters/wipers ($300), miscellaneous ($700) = ~$3,000.
The EV maintenance edge isn’t just about oil. Regenerative braking dramatically extends brake life. No transmission. Fewer fluids. Fewer moving parts.
Insurance. EVs cost 15-25% more to insure. Higher repair costs (specialized parts, fewer shops), higher replacement values, and limited shop networks all push premiums up. Over 10 years, $3,750 working against the EV.
Resale value. Both depreciate ~80% over 10 years. EV depreciation is more variable: Tesla holds value well, some older non-Tesla EVs depreciate faster than ICE due to rapid tech improvement making older models look obsolete.
Without the tax credit, it’s a coin flip
Pull out the tax credit row, and the math nearly ties:
- EV TCO: $53,750 + $7,500 = $61,250
- Gas TCO: $62,000
EV wins by $750 over 10 years — roughly $75/year. That’s noise. Specific rates and habits flip this either direction.
The cases where EV wins clearly without the credit:
- High annual mileage (20K+ miles/year)
- Cheap home electricity ($0.10/kWh or below)
- Expensive gas ($4.50+/gallon)
The cases where gas wins:
- Low annual mileage (8K or less)
- Expensive electricity ($0.25+/kWh)
- Primary reliance on DC fast charging
- No home charging available
What changes the answer most
Annual mileage. The EV’s fuel-cost advantage scales linearly with miles. At 8K mi/year, the 10-year fuel savings drop to ~$6,000. At 25K mi/year, they grow to $19,000. Mileage is the single biggest swing factor.
Home vs DC fast charging. Home charging at $0.14/kWh: EV fuel cost $6,000 over 10 years. DC fast at $0.40/kWh: EV fuel cost $17,000. Same car, same miles. The infrastructure question is huge.
Tax credits. US federal credit: up to $7,500 for qualifying vehicles, but income caps and vehicle price caps apply. State credits add $500-$5,000 in some states. Without these, EVs need either lower purchase prices or higher mileage to break even.
Electricity rate. National average $0.14/kWh. CA: $0.30+/kWh. WA + parts of TN: $0.10/kWh. Local variance can move the EV’s fuel cost by 2x.
Where this scenario doesn’t apply
- Used EVs. Different math entirely — depreciation already absorbed, but battery health and out-of-warranty repair risk are concerns. Worth analyzing separately.
- Heavy-duty or fleet use. Commercial trucks, vans with continuous use have different fuel/maintenance ratios.
- Cold climates. EV range drops 20-40% in extreme cold; this affects “real” miles per kWh and may require higher-capacity battery, raising the entry price.
- Apartment or street parking. No home charging access. Public charging dependency makes the EV case much weaker.
What to actually do
- Get specific gas + electricity rates for your area.
- Run the calculator with your actual annual mileage.
- Verify tax credit eligibility for the specific EV you’re considering.
- Check whether you can install home charging.
- If home charging is a no, run the math at DC fast charge prices before committing.
Open the EV vs Gas Calculator → and run your specific rates. The break-even year is the critical output; everything else is intermediate.