Sticker price is only part of the picture. An EV usually costs more to buy than an equivalent petrol car, but is dramatically cheaper to run. The real question for an Australian buyer in 2025–26 is how long it takes for the running-cost difference to overhaul the higher purchase price — and whether you'll keep the car long enough to benefit.
This breakdown uses current Australian numbers and a side-by-side mid-size SUV comparison. You can rerun any of these scenarios in the EV vs petrol calculator with your own inputs.
The four costs that matter
For a fair, like-for-like cost-of-ownership comparison, four numbers do the heavy lifting:
- Purchase price — drive-away, after any state EV incentive or stamp-duty concession.
- Annual fuel — petrol litres × pump price, or kWh × home electricity rate.
- Annual servicing — capped-price service costs, plus tyres and consumables.
- Annual kilometres — the multiplier that decides how fast each year's running-cost difference accumulates.
Depreciation, registration, CTP and insurance all matter eventually, but they're often broadly comparable across body styles and not where the EV/petrol difference lives. Get specific quotes for both vehicles before locking in a final decision.
Worked example: mid-size SUV
Pick a representative pair: an EV at $55,000 drive-away versus a petrol equivalent at $38,000 drive-away. Australian average annual mileage of 15,000 km. Petrol at 195 c/L and a 10 L/100km combined-cycle figure. Home electricity at 30 c/kWh and an 18 kWh/100km EV. Servicing of $300/yr (EV) versus $1,200/yr (petrol).
Annual running costs
| Item | EV | Petrol |
|---|---|---|
| Fuel / electricity | $810 | $2,925 |
| Servicing & consumables | $300 | $1,200 |
| Annual total | $1,110 | $4,125 |
The EV runs $3,015 cheaper per year. Spread over the $17,000 purchase-price gap, that means the EV breaks even at around 5.6 years. Hold the car for 10 years and the EV ends up roughly $13,000 cheaper overall.
10-year cumulative cost
| Year | EV cumulative | Petrol cumulative | Difference |
|---|---|---|---|
| Purchase | $55,000 | $38,000 | −$17,000 |
| Year 5 | $60,550 | $58,625 | −$1,925 |
| Year 6 | $61,660 | $62,750 | +$1,090 |
| Year 10 | $66,100 | $79,250 | +$13,150 |
What changes the answer
Three inputs swing the result more than any others:
- Annual kilometres. At 25,000 km/year (a long commute), the break-even drops to under 4 years and 10-year savings jump to over $25,000. At 8,000 km/year (occasional driver), the EV may never break even within 10 years.
- Home electricity rate. Charging from rooftop solar export (effective 5 c/kWh) cuts EV fuel cost to around $135/year and shrinks break-even to under 4 years. Relying on public DC fast charging at 60 c/kWh more than doubles EV fuel cost and pushes break-even to 8+ years.
- Petrol price. Each 20 c/L move in pump prices changes annual petrol cost by ~$300 for our example driver, and break-even by roughly half a year.
What about depreciation?
EV residual values in Australia have stabilised after a wobbly 2024. Glass's Guide and major novated-lease operators publish residual values that sit broadly within the same band as petrol equivalents for the most popular models, with marked variation by brand. If you have a specific resale forecast you trust, subtract the resale value from each vehicle's purchase price and rerun the comparison with those net costs.
Charging mix: the most-overlooked input
The single biggest mistake when modelling EV running costs is using a single electricity rate. In reality, most owners charge with a blend of home overnight (often 20–25 c/kWh on a time-of-use plan), home daytime from solar (effectively 5 c/kWh if it would otherwise have been exported), and occasional public DC fast charging (35–70 c/kWh).
Build a realistic blended rate before rerunning the calculator. For example: 70% overnight at 22 c/kWh, 20% daytime solar at 5 c/kWh, 10% public at 60 c/kWh works out to a blended rate of about 22 c/kWh — meaningfully cheaper than the 30 c/kWh default.
State incentives still matter at the margin
The federal Fringe Benefits Tax exemption for eligible EVs under the Luxury Car Tax fuel-efficient threshold remains the single largest financial advantage for novated-lease buyers, and it materially changes the after-tax break-even maths for salaried employees. State stamp-duty concessions and registration discounts vary widely — Victoria, NSW and the ACT have all adjusted their EV-specific incentives in the past 18 months, and the Northern Territory and South Australia run smaller schemes. Treat any state incentive as time-limited until you've checked the current published settings on your state revenue office's website.
Outside salary packaging, the headline EV incentives in 2025–26 are smaller than they were two years ago, but cumulative running-cost savings remain the dominant lever in the calculator. The single biggest decision still sits with how much you'll drive and where you'll charge.
The verdict for 2026
For an average Australian driver doing 12,000–18,000 km a year, charging mostly at home, an EV in 2026 is cheaper to own over 6+ years than an equivalent petrol car. The break-even pushes earlier with high mileage, solar self-charging or a TOU plan, and later with low mileage or heavy reliance on public fast charging. The arithmetic is unforgiving in both directions: an EV bought to do 6,000 city kilometres a year, charged on a flat 35 c/kWh tariff, will struggle to pay back its purchase premium inside a typical ownership cycle.
If you're considering charging from rooftop solar, the solar payback calculator shows how the panels themselves pay back over 25 years. For the highest-impact household electricity moves alongside an EV, see the guide to reducing your electricity bill.
Sources
- Australian Institute of Petroleum — weekly retail petrol prices.
- Australian Energy Regulator — Default Market Offer 2025–26.
- ATO — vehicle running-cost conventions and logbook method.
- Electric Vehicle Council — Australian EV market and incentive snapshots.