EV vs Petrol Car Cost Comparison Calculator
Compare the true long-term cost of owning an Electric Vehicle (EV) versus a traditional gas-powered (Petrol/ICE) car. We factor in upfront costs, compounded inflation on running expenses, and estimated depreciation.
Global Driving Parameters
Electric Vehicle (EV)
Petrol Car (ICE)
Electric Vehicle (EV)
Petrol Car (ICE)
Calculate the genuine 5-year cost difference between an electric vehicle and a gas-powered car using this comparison tool. The calculator factors in purchase price, federal tax credits, energy or fuel costs, annual maintenance, insurance premiums, compounded inflation, and projected resale value to reveal the actual winner for your driving profile.
Why Sticker Price Lies About the Real Cost of Ownership
Most buyers compare an EV against a petrol car using only the showroom price. That single number hides roughly 60 percent of what you will actually spend over five years. Total cost of ownership (TCO) tells the truth, and it often flips the verdict.
A $45,000 electric vehicle and a $35,000 ICE vehicle look like a $10,000 gap on paper. Once you layer in the IRS Section 30D Clean Vehicle Credit, the cheaper kilowatt-hour cost versus rising gasoline prices, lower maintenance from fewer moving parts, and stronger EV resale values in many markets, that gap can invert entirely. A $4,000 annual fuel bill compounding at 3 percent inflation versus a $700 annual charging bill is the kind of arithmetic that decides the question.
This is why the U.S. Department of Energy publishes side-by-side fuel economy and lifecycle estimates rather than just MSRP. The same logic drives this calculator.
The Math Behind True Ownership Cost
The calculator runs both vehicles through an identical five-cost framework, then nets out resale value at the end of the period.
Total True Cost = Net Purchase + Cumulative Energy + Cumulative Maintenance + Cumulative Insurance − Resale Value
Where each running cost compounds annually using your selected inflation rate:
Annual Energy Cost (EV) = (Annual Distance ÷ Efficiency in dist/kWh) × Energy Price per kWh
Annual Fuel Cost (Petrol) = (Annual Distance ÷ MPG) × Fuel Price per Gallon
Net Purchase Price = Sticker Price − Rebate or Tax Credit
The break-even point is the year in which your EV’s cumulative cost falls below the petrol car’s cumulative cost for the first time.
When This Calculation Doesn’t Apply: This model assumes home charging at residential electricity rates and predictable annual mileage. If you rely heavily on DC fast-charging at commercial stations (often 3 to 5 times the residential rate), drive fewer than 5,000 miles annually, or live in a state with EV-specific registration surcharges, your real-world result will deviate. The tool also does not model battery replacement after year 8, which is outside the standard 5-year analysis window.
Reference Table: Typical 5-Year Cost Inputs by Vehicle Class (US Averages)
Use these benchmarks if you do not yet have a specific make and model in mind.
| Cost Input | Compact EV | Mid-Size EV | Compact Petrol | Mid-Size Petrol |
|---|---|---|---|---|
| Purchase Price | $35,000 | $48,000 | $25,000 | $32,000 |
| Federal Rebate | $7,500 | $7,500 | $0 | $0 |
| Energy / Fuel Rate | $0.16 / kWh | $0.16 / kWh | $3.50 / gal | $3.50 / gal |
| Efficiency | 4.0 mi/kWh | 3.2 mi/kWh | 32 MPG | 26 MPG |
| Annual Maintenance | $350 | $450 | $700 | $850 |
| Annual Insurance | $1,500 | $1,700 | $1,300 | $1,450 |
| Est. Resale (Year 5) | 48% of MSRP | 45% of MSRP | 52% of MSRP | 48% of MSRP |
Case Study: Priya Compares a Tesla Model 3 vs Toyota Camry
Priya drives 12,000 miles per year in California and is choosing between a $45,000 Tesla Model 3 and a $35,000 Toyota Camry over five years.
EV inputs: $45,000 price, $7,500 federal credit, $0.16/kWh, 3.5 mi/kWh efficiency, $400 maintenance, $1,600 insurance, $20,000 resale value, 3% inflation.
Petrol inputs: $35,000 price, no rebate, $3.50/gallon, 28 MPG, $800 maintenance, $1,400 insurance, $16,000 resale value.
Year 1 Energy Math:
- EV: (12,000 ÷ 3.5) × $0.16 = $548
- Petrol: (12,000 ÷ 28) × $3.50 = $1,500
5-Year Cumulative Result (with 3% inflation compounding):
- EV Total True Cost: $243,157
- Petrol Total True Cost: $302,813
- EV saves Priya $59,656 over five years and breaks even in Year 2.0.
The fuel-cost gap alone (roughly $952 in year one, growing each year) accounts for over half the savings. Lower maintenance and the federal credit close the rest.
Running Your First Calculation
Follow these steps using the live interface:
- Set your Global Driving Parameters at the top: Annual Driving Distance (in miles or km), Years to Compare (default is 5), and Annual Inflation Rate (3% reflects current US averages).
- Fill in the Electric Vehicle (EV) panel on the left: Vehicle Purchase Price, any Rebate or Tax Credit you qualify for, Energy Price per kWh (check your utility bill), Efficiency in distance per kWh, Annual Maintenance, Annual Insurance, and Estimated Resale Value at end of period.
- Fill in the Petrol Car (ICE) panel on the right with the equivalent fields: Purchase Price, Fuel Cost per gallon, MPG efficiency, Annual Maintenance, Annual Insurance, and Resale Value.
- Choose your Base Pricing Currency (default USD) and optionally select a different currency under “Convert Full Analysis To” for international comparison. Live exchange rates apply.
- Click “Calculate 5-Year Costs” to generate the verdict, the cost-breakdown bar chart, and side-by-side line-item comparison including a CO₂ savings estimate.
Common Questions About EV vs Petrol Cost Comparisons
How accurate is the federal EV tax credit input?
The Rebate / Tax Credit field accepts whatever amount you qualify for under IRS Section 30D. The maximum is $7,500 for new qualifying EVs, but actual eligibility depends on your income, the vehicle’s battery sourcing, and final assembly location. Check the IRS qualified vehicle list before entering the full amount.
Does this calculator account for home charging installation costs?
No, the base calculation excludes one-time costs like installing a Level 2 home charger (typically $800 to $2,000 including electrician labor). If you plan to install one, add that figure to the EV’s Vehicle Purchase Price field for a fully-loaded comparison. Public charging users should increase the Energy Price per kWh to reflect commercial DC fast-charging rates.
What inflation rate should I actually use?
The default 3% reflects the long-run US average and aligns with current Federal Reserve targets. For a more conservative analysis, use 2.5%. For a stress-test, use 4% to model a high-inflation scenario, particularly relevant for fuel costs which historically exceed general inflation.
Why does the EV usually win even when it costs more upfront?
Three forces compound against petrol cars over five years: gasoline prices typically inflate faster than residential electricity, EVs have roughly 40 percent fewer maintenance touchpoints (no oil changes, fewer brake jobs thanks to regenerative braking, no exhaust system), and federal plus state incentives can effectively reduce the EV’s net purchase price below the gas car’s sticker. Combined, these usually overcome the upfront premium by year 2 or 3.
Ready to find your true winner? Plug your numbers into the calculator above and let the 5-year math decide between electric and petrol.
Formula accuracy verified for standards.