What an EV really costs over five years in Australia, compared with petrol

The great EV ownership debate is usually presented like a pub argument with spreadsheets: one side waving fuel savings, the other brandishing depreciation like a warning sign in the dark. The truth, annoyingly enough, is less dramatic and far more useful. An EV can be cheaper to own over five years, but only if the numbers are allowed to behave themselves.

The trick is that ‘cheaper’ is not a single number. Purchase price, electricity, fuel, servicing, insurance, registration, depreciation and finance all take a turn at the wheel. Ignore one of them and you are not doing a comparison. You are doing theatre with receipts.

Start with the ugly bit: purchase price

The first thing that skews any five-year ownership model is the price you pay to get the car in the first place. The evidence available here supports a simple but important point: the purchase price gap between an EV and a comparable petrol car is often large enough to swallow a lot of the running-cost advantage over five years. That does not mean an EV is always the expensive option. It means the upfront premium is not a footnote. It is the main event, wearing a fake moustache.

If you borrow to buy the car, finance costs make that gap even nastier. Interest on a higher EV purchase price can materially worsen total cost of ownership. In other words, the bank can turn a sensible spreadsheet into a small tragedy with monthly direct debits.

Charging costs can be tiny, or absolutely not

Electricity is where EV ownership can look gloriously efficient. Home charging is materially cheaper than public fast charging, but the real cost depends on what kind of electricity you use and how you charge. Rooftop solar, off-peak grid power and expensive DC fast charging are not remotely the same beast, and pretending otherwise is how you end up comparing a cheap commute with a very expensive coffee habit.

Any per-kilometre or per-100-kilometre EV running-cost figure needs to state three things clearly: the electricity price, the charging mix and the vehicle’s energy consumption. Leave out any of those and the answer becomes slippery enough to escape through a crack in the garage floor. The evidence also supports a broader point: a petrol car’s fuel bill over five years depends mostly on fuel price and real-world consumption, so the savings from EV charging vary wildly depending on where and how you charge.

Servicing usually favours the EV, but not by magic

EV servicing is generally lower than petrol-car servicing because there are fewer moving parts and no oil changes. That is a genuine advantage, not marketing confetti. But lower servicing does not mean no servicing. Tyres, brakes and other consumables still exist, stubbornly refusing to vanish just because the drivetrain is more elegant.

Some reports have also flagged that maintenance bills for EVs can rise in particular cases, especially when repair or servicing requirements are more specialised. So yes, the average EV often has the edge here. No, that does not mean every EV will quietly save you money in every workshop visit. Cars remain committed to being expensive in creative ways.

Insurance and depreciation are the two sneaky villains

Insurance premiums for EVs are often higher than for comparable petrol cars, although not universally so. The reasons are not mysterious. Higher vehicle values, more expensive repair parts, specialist labour and patchier repair networks all push premiums up. Insurance companies are not running a charity for battery packs and body panels.

Depreciation is the bigger beast. It is one of the largest cost factors in a five-year ownership model and can easily outweigh fuel savings if the EV costs much more to buy or the used market turns frosty. That matters because battery warranties do not erase resale risk. A covered battery is reassuring, but it does not stop buyers from worrying about degradation or replacement cost, and those fears can still drag on used values.

State taxes, registration and road-use charges complicate the tidy version

Australia does not offer one neat national rulebook here. Registration and road-use charges for EVs vary by state and territory, and the policy landscape has changed over time. Some jurisdictions have had EV-specific concessions while others have applied road-user charging. That is the kind of federalism that makes simple comparisons age badly and spreadsheets develop a twitch.

For the reader, the practical lesson is obvious. A five-year ownership comparison in Australia cannot be treated as universal without checking local charges. If someone presents you with a country-wide EV cost answer without mentioning state rules, they are either simplifying aggressively or hoping you will not notice the missing piece.

How much does usage change the answer? A lot.

Annual distance travelled matters because the running-cost savings only arrive when the car is actually driven. The evidence supports the need to state annual kilometres explicitly in any Australian ownership model. A low-kilometre driver has less chance to recover an EV’s higher upfront premium than a high-kilometre driver. That is not a moral judgement. It is arithmetic, the one form of discipline cars still respect.

The same goes for charging access. A driver who can charge at home is in a very different position from someone who must rely heavily on public fast chargers. Likewise, a petrol car driven hard with thirsty real-world consumption will rack up fuel costs faster than a light commuter. Put simply: the more kilometres you do, the more the running costs matter. The fewer you do, the more the purchase price and depreciation loom like tax time in a fluorescent vest.

What a cautious five-year model should include

If you want to compare two specific cars without getting mugged by bad assumptions, the model needs to be brutally explicit. State the purchase price of each car. State whether you are borrowing, and if so, include finance costs. State annual kilometres. State electricity price and charging mix for the EV. State petrol price and real-world consumption for the petrol car. Include servicing, insurance, registration and any road-use charges that apply in the relevant state or territory. Then include depreciation, because pretending it is optional is how people end up very attached to a spreadsheet and very disappointed by a resale quote.

Battery concerns should be included as a risk factor rather than a panic button. The evidence supports that battery warranties and degradation matter to ownership maths, but a warranty does not remove depreciation risk. That is the fine print doing what fine print does best: arriving late, looking innocent and costing money.

So, is an EV cheaper over five years?

The honest answer is: sometimes, and not always by much once every cost bucket is counted properly. EVs usually have lower energy and servicing costs, but those savings can be offset by higher purchase prices, higher insurance, depreciation and, for some drivers, expensive public charging or finance costs. If home charging is available and the vehicle is driven enough, the EV case strengthens. If charging is mostly public, the case weakens. If the car is driven very little, the upfront premium and depreciation loom larger. None of this is surprising. It is just inconvenient for anyone hoping for a one-size-fits-all answer.

So the sensible approach is not to ask whether EVs are always cheaper. They are not. Ask whether the specific EV you are considering, in your state, with your driving pattern and your charging setup, beats the specific petrol car you are comparing it with. That is less glamorous than a sweeping slogan, but far more useful. And unlike a slogan, it does not collapse the moment you look at the invoice.

Zachary Skinner

Zachary Skinner is the editor of TechDrivePlay.com, where tech, cars and adventure share the fast lane.
A former snowboarding pro and programmer, he brings both creative flair and technical know-how to his reviews. From high-performance cars to clever gadgets, he explores how innovation shapes the way we move, connect and live.