# EV vs Gas Savings: Compare Fuel Cost, Charging Cost, and Annual Savings

Compare electric vehicle charging cost with gasoline fuel cost using annual mileage, gas price, MPG, electricity rate, and EV kWh per mile.

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- **Canonical URL:** https://dothecalculation.com/blog/green/electric-vehicle-savings-analysis
- **Category:** Eco & Sustainability
- **Author:** Do The Calculation Team
- **Published:** 2026-06-04
- **Last updated:** 2026-07-03
- **Reading time:** 18 min read
- **Publisher:** Do The Calculation (https://dothecalculation.com)
- **Methodology:** https://dothecalculation.com/methodology

---

## Quick Answer: EV Fuel Savings Come From Price per Mile

The simplest EV-vs-gas comparison is operating energy cost per year. A gasoline car uses gallons. An EV uses kilowatt-hours. Once both are converted to annual cost, the savings estimate is straightforward: annual gas cost minus annual EV charging cost.

The DTC EV vs Gas Savings Calculator focuses on that operating-cost comparison. It does not decide whether an EV is the cheaper total vehicle. Purchase price, depreciation, financing, insurance, registration fees, charger installation, repair cost, incentives, and resale value all need separate review.

> **Current U.S. clean-vehicle credit caveat** — As of this July 3, 2026 review, IRS guidance says the New Clean Vehicle Credit and Previously-Owned Clean Vehicle Credit are not available for vehicles acquired after September 30, 2025. The DTC calculator does not include tax credits in its savings result.

_[Figure: The calculator compares annual energy cost only — It is a fuel/charging model, not a full total-cost-of-ownership model.]_

## How the DTC EV vs Gas Calculator Works

**Live EV vs gas formula**

```
Gas cost = (annual mileage / gas MPG) x gas price per gallon
EV kWh needed = annual mileage x EV kWh per mile
EV cost = EV kWh needed x electricity rate per kWh
Annual savings = gas cost - EV cost
Monthly equivalent = annual savings / 12
```
- Gas MPG is clamped to at least 1 to avoid division by zero.
- Negative savings are possible if charging is expensive, EV efficiency is poor, or gasoline is cheap.
- The result is operating energy cost only.

Tool: [Use the EV vs Gas Savings Calculator](https://dothecalculation.com/calculators/ev-vs-gas-calculator) — Enter mileage, gas price, gas MPG, electricity rate, and EV kWh per mile to compare annual energy costs.

## Worked Example Using the Live Default Inputs

The live default inputs are 15,000 annual miles, $3.50 per gallon gasoline, 30 MPG, $0.15 per kWh electricity, and 0.30 kWh per mile. The gasoline vehicle uses 500 gallons, costing $1,750 per year. The EV uses 4,500 kWh, costing $675 per year. The modeled annual savings are $1,075, or about $90 per month.

**Default EV vs gas scenario**
| Metric | Formula | Result |
| --- | --- | --- |
| Gas gallons | 15,000 / 30 | 500 gallons |
| Gas cost | 500 x $3.50 | $1,750 |
| EV electricity use | 15,000 x 0.30 | 4,500 kWh |
| EV charging cost | 4,500 x $0.15 | $675 |
| Annual savings | $1,750 - $675 | $1,075 |
| Monthly equivalent | $1,075 / 12 | About $90 |

_[Figure: Default annual energy cost comparison — At the default assumptions, EV charging costs less than gasoline fuel.]_

## Inputs That Matter Most

The savings estimate changes quickly with local prices and vehicle efficiency. A driver with high annual mileage, expensive gasoline, efficient EV charging, and low residential electricity rates will usually see a larger operating-cost gap. A driver relying on expensive public fast charging may see much smaller savings.

- Use your real annual mileage, not the national average, if your driving pattern is unusual.
- Use actual gasoline price in your area and rerun the scenario when prices change.
- Use combined MPG from your real vehicle or EPA/fueleconomy.gov data.
- Use the electricity rate you actually pay for charging, including time-of-use pricing if applicable.
- Use kWh per mile from the EV window sticker, EPA data, or your vehicle’s energy history.
- Run a separate case for public DC fast charging if you expect to rely on it often.

## MPGe, kWh per Mile, and Why the Calculator Uses kWh per Mile

MPGe is useful for comparing energy efficiency on a common label. EPA explains that 33.7 kWh is treated as the energy equivalent of one gallon of gasoline. But for household cost planning, kWh per mile is more direct: it tells you how many kilowatt-hours the vehicle uses for each mile you drive.

**EV efficiency terms**
| Term | What it means | How it is used |
| --- | --- | --- |
| kWh per mile | Electricity consumed per mile | Direct input for DTC cost calculation |
| kWh per 100 miles | Electricity consumed per 100 miles | Divide by 100 to get kWh per mile |
| Miles per kWh | Miles driven per kWh | Take 1 / miles per kWh to get kWh per mile |
| MPGe | Miles per gallon equivalent | Useful label comparison, not the direct bill input |

## Why Fuel Savings Are Not the Same as Total Cost of Ownership

A lower energy cost does not automatically mean the EV is cheaper overall. Purchase price, trade-in value, depreciation, financing, insurance, tires, registration fees, charger installation, maintenance, battery warranty, and local incentives can all change the total decision.

**What to review outside the DTC fuel calculator**
| Cost area | Why it matters | Where to check |
| --- | --- | --- |
| Purchase price | Higher upfront price can offset fuel savings | Dealer quote and financing offer |
| Depreciation | Resale value can dominate total cost | Used-market comparisons |
| Insurance | Repair cost and parts can change premiums | Actual insurance quotes |
| Charging setup | Home charger installation may add upfront cost | Electrician quote and utility rules |
| Incentives | Eligibility changes by date, vehicle, buyer, and jurisdiction | IRS, state, and utility sources |
| Maintenance | EVs avoid some services but still need tires, brakes, fluids, and repairs | Owner manual and service history |

## Sources to Verify or Cite

- DTC calculator-core-v2 calculateEvVsGasSavings implementation and ev-vs-gas calculator page, reviewed July 3, 2026.
- EPA and DOE, FuelEconomy.gov vehicle efficiency data: https://www.fueleconomy.gov/
- EPA, Fuel Economy and EV Range Testing: https://www.epa.gov/greenvehicles/fuel-economy-and-ev-range-testing
- EPA, Greenhouse Gas Emissions from a Typical Passenger Vehicle: https://www.epa.gov/greenvehicles/greenhouse-gas-emissions-typical-passenger-vehicle
- EIA, Gasoline and Diesel Fuel Update: https://www.eia.gov/petroleum/gasdiesel/
- EIA, Electric Power Monthly electricity prices: https://www.eia.gov/electricity/monthly/
- IRS, Clean Vehicle Tax Credits: https://www.irs.gov/clean-vehicle-tax-credits

## Editorial Trust Note

> **How this guide was reviewed** — Last reviewed July 3, 2026. The formula and worked example were checked against the live DTC calculator. Current incentive caveats were checked against IRS guidance, but vehicle, buyer, and state eligibility can change and should be verified before purchase.

## Frequently Asked Questions

**What does a positive EV savings result mean?**

It means the modeled annual gasoline cost is higher than the modeled annual EV charging cost for the entered assumptions.

**Can the savings result be negative?**

Yes. Expensive charging, low gasoline prices, low annual mileage, poor EV efficiency, or a very efficient gas car can make EV charging cost more in the model.

**Does the calculator include EV tax credits?**

No. It compares fuel and charging cost only. IRS guidance reviewed July 3, 2026 says clean vehicle credits are not available for vehicles acquired after September 30, 2025.

**What electricity rate should I enter?**

Enter the rate you actually pay for charging. If you use time-of-use pricing, run separate scenarios for off-peak home charging and public fast charging.

**How do I convert kWh per 100 miles to kWh per mile?**

Divide by 100. For example, 30 kWh per 100 miles equals 0.30 kWh per mile.

**How do I convert miles per kWh to kWh per mile?**

Take the reciprocal. For example, 3.3 miles per kWh is about 0.303 kWh per mile.

**Does public fast charging change the result?**

Often, yes. Public DC fast charging can cost more than residential electricity, reducing or eliminating the fuel-cost advantage.

**Is EV charging always cleaner than gasoline?**

EVs have no tailpipe emissions, but electricity generation emissions vary by grid region. Use EPA or utility tools for location-specific emissions comparisons.

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_Source: [Do The Calculation](https://dothecalculation.com/blog/green/electric-vehicle-savings-analysis). Quote freely with attribution and a link to this page._