Enter the purchase price of both vehicles, your monthly mileage, fuel economy for the gas car, electricity cost, and EV efficiency — this calculator shows your monthly fuel savings, total savings including maintenance, and the exact break-even point in months. It also builds a 5-year total cost comparison so you can see whether the EV pays off over the life of the loan.
EV vs Gas Break-Even Calculator
| Gas Car | EV | EV Saves |
|---|
The Real Cost Comparison: What Most EV Articles Get Wrong
Most EV vs gas comparisons only count fuel savings. The complete picture includes four areas where EVs differ from gas cars on total cost:
| Cost Category | EV Advantage | EV Disadvantage |
|---|---|---|
| Fuel (fuel vs electricity) | Electricity is 3-4x cheaper per mile in most markets | Home charging requires level 2 installation ($500-1,500) |
| Maintenance | No oil changes, less brake wear (regen braking), no spark plugs, fewer fluid services | Tyre wear is higher due to weight and instant torque |
| Purchase price | Federal tax credit up to $7,500 on qualifying vehicles | EVs typically cost $5,000-15,000 more than comparable ICE |
| Depreciation | Brand-dependent — some EVs hold value well | Battery degradation affects resale; uncertain long-term market |
| Insurance | Similar for most models | Repair costs are higher; some models cost 10-15% more to insure |
What Is the True Cost Per Mile to Run an EV?
The US national average electricity price is around $0.13-0.16/kWh. Most EVs achieve 3-4 miles per kWh in real-world use. This gives an electricity cost of:
- At $0.13/kWh, 4 miles/kWh: $0.033 per mile
- At $0.16/kWh, 3.5 miles/kWh: $0.046 per mile
- Gas car at 30 MPG, $3.50/gal: $0.117 per mile
- Gas car at 25 MPG, $3.50/gal: $0.140 per mile
The EV fuel cost advantage is 3-4x per mile in most US markets. At 15,000 miles per year, that is a saving of roughly $1,000-1,500 annually on fuel alone. Use the Cost Per Mile Calculator to input your actual monthly figures and see where your specific situation lands.
EV Maintenance Savings: What You No Longer Pay For
A realistic annual maintenance savings estimate for most EVs versus a comparable gas car is $600-1,000/year. Here is what disappears from your maintenance schedule:
- No oil changes: $80-150/year for synthetic oil changes
- No spark plugs or ignition system service
- No transmission fluid: Most EVs use a single-speed reducer with sealed fluid
- Reduced brake pad wear: Regenerative braking handles most deceleration — EV brake pads often last 100,000+ miles
- No coolant flushes (battery thermal management systems use different intervals)
- No air filter replacements for the engine (cabin filter still applies)
What EVs still need: tyre rotations and replacements (more frequently than ICE due to weight and torque), cabin air filter, brake fluid, wiper blades, and occasional 12V battery replacement.
Federal Tax Credits and Incentives: What Qualifies in 2024-2025
The Inflation Reduction Act provides up to $7,500 in federal tax credit for qualifying new EVs purchased from 2023 onward. Key conditions:
- Vehicle MSRP cap: $55,000 for cars, $80,000 for trucks/SUVs/vans
- Income limits: $150,000 AGI for single filers, $300,000 for joint filers
- Battery sourcing requirements apply — not all EVs qualify
- The credit is now transferable to the dealer at point of sale (immediate discount)
- Used EV credit: up to $4,000 for qualifying used EVs under $25,000
Always check the official IRS list for eligible vehicles before calculating your break-even — the $7,500 credit directly reduces your price premium and can cut months off the break-even point.
When the Numbers Do Not Favour an EV
Not every situation suits an EV. The break-even case weakens significantly when:
- Low annual mileage: Under 8,000 miles/year, fuel savings are too small to recover the price premium within a reasonable ownership period
- Expensive home electricity: In states like Hawaii or California where electricity costs 25-35 cents/kWh, the fuel savings advantage shrinks substantially
- No home charging: Relying on public DC fast charging is expensive — Level 3 chargers often cost $0.30-0.45/kWh, reducing the cost advantage over gas
- Long daily range requirements: Regular routes over 200 miles require charging stops, which adds time and planning overhead
- Cold climate: EV range drops 20-40% in cold temperatures, affecting real-world efficiency assumptions
Mechanic’s Tip
The question I get most often is whether to buy an EV now or wait. My honest answer: if you drive more than 12,000 miles per year, have a garage or driveway where you can install a Level 2 charger, and the vehicle you want qualifies for the tax credit — the financial case is solid today. If you park on the street, rely on public charging, or drive fewer than 8,000 miles per year, the numbers usually do not work cleanly. Run this calculator with your real figures before making the decision.
Frequently Asked Questions
What EV efficiency should I use in the calculator?
Use the EPA combined efficiency in miles per kWh from the vehicle’s spec sheet, then reduce by 10-15% for real-world conditions. Common real-world figures: Tesla Model 3 Long Range ~4.0 miles/kWh, Chevy Bolt ~3.5 miles/kWh, Ford F-150 Lightning ~2.0 miles/kWh, Rivian R1T ~1.8 miles/kWh.
Does the calculator include battery replacement cost?
No — battery replacement is a low-probability but high-cost event. Most EV batteries carry 8-year/100,000-mile warranties on capacity. Real-world data from high-mileage Teslas shows less than 10% degradation at 200,000 miles in moderate climates. The risk is real but not a significant factor for most 5-7 year ownership periods.
How does depreciation compare between EVs and gas cars?
It varies significantly by brand. Tesla vehicles have historically depreciated less than average. Many other EVs have depreciated faster as newer models with better range arrive. Use the Car Depreciation Calculator to project residual value — a lower residual value on the EV weakens the financial case regardless of fuel savings.
As an Amazon Associate we earn from qualifying purchases.
