EV vs Gas Break-even Calculator

How to use the break-even calculator

Enter the purchase prices of the EV and its closest gas equivalent, select your federal credit eligibility status, choose your state, and fill in your annual mileage. The calculator pre-fills electricity rates from EIA's residential average for your selected state and gas prices from EIA's weekly retail survey — but override these if you know your actual home rate from your utility bill.

The horizon (years) input controls how far out the total-cost comparison runs. Seven years is the default because it aligns with most auto loan terms and typical ownership durations. Use 5 years for a conservative estimate, 10 for a full ownership lifecycle comparison.

The state incentive field is a manual input — we cannot automate every utility rebate and state program because they change frequently and vary by income and address. Use your state guide to find your current eligible amount, then enter it here to see its effect on break-even.

How to interpret the results

The break-even year is the point at which the EV's cumulative total cost (purchase minus incentives, plus operating costs) falls below the gas vehicle's cumulative total cost. Before that year, the gas car is cheaper in aggregate. After it, the EV is. A break-even of year 3.5 means that if you drive this EV for fewer than 3.5 years, the gas car would have been cheaper; beyond 3.5 years, the EV comes out ahead.

What moves the break-even year most:

• Federal incentive eligibility — the $7,500 credit directly reduces the price gap. The single biggest lever. A buyer eligible for the full credit often sees break-even 1.5–2.5 years earlier than one who isn't.
• Electricity rate vs gas price ratio — states with cheap electricity and expensive gas (like Washington, Oregon, Louisiana) favor EVs. States with expensive electricity and cheap gas (like Hawaii, Connecticut) see slower break-even.
• Annual miles driven — more miles means the per-mile operating savings compound faster. A 20,000 mile/year driver reaches break-even roughly twice as fast as a 10,000 mile/year driver, everything else equal.
• Price gap between the EV and its gas equivalent — a smaller gap (e.g., Chevrolet Equinox EV vs Equinox gas) breaks even much faster than a large gap (e.g., Rivian R1T vs Ford F-150). Use our model comparison pages for pre-built scenarios.

Sensitivity: what a $0.01 change in electricity rate does

At 12,000 miles/year and 28 kWh/100mi efficiency, a $0.01/kWh increase in your electricity rate adds approximately $34/year to your EV operating cost. That shifts break-even forward by about 0.1–0.3 years depending on the price gap. Conversely, a $0.10/gallon drop in gas price reduces annual gas savings by about $40 at 28 MPG. These numbers matter at the margin — but the dominant drivers are incentive eligibility and price gap, not small rate fluctuations.

What this calculator excludes (and why)

• Financing costs. Auto loan APR ranges from 0% (manufacturer-subvented) to 14%+ (subprime). Including APR would require an amortization model that obscures the pure EV-vs-gas comparison. Run the price delta through any auto-loan calculator separately to layer financing costs on top of our break-even output.
• Maintenance differential. EVs skip oil changes, spark plugs, fuel filters, and most brake wear (regenerative braking). They still require tire rotations (more frequently — EVs are heavier), cabin filters, 12V battery replacement, and brake fluid flushes. The net annual saving is roughly $400–$800 but variance is high. We exclude it rather than fake precision. See our methodology page for detail.
• Insurance differential. EV insurance runs 10–20% higher than equivalent ICE in most US markets due to higher repair costs. Excluding it understates the EV's operating cost slightly — an honest disclosure.
• Depreciation. EV residual values are difficult to forecast, especially as battery costs continue to fall and new models displace older ones. We present a purchase-cost comparison, not a depreciation-adjusted lease-equivalent analysis.

Where the data comes from

Electricity rates: U.S. Energy Information Administration (EIA) Electric Power Monthly, residential average by state, refreshed quarterly. Gas prices: EIA Gasoline and Diesel Fuel Update, regular-grade weekly retail, refreshed monthly. Vehicle MSRPs and EPA efficiency ratings: fueleconomy.gov plus manufacturer specifications. Federal incentive logic: IRS Section 30D and 25E. State and utility incentives: state energy office publications and DSIRE database.