Should You Trade In Your Petrol Car for an EV or Sell It Privately? (Australia 2026)

If you trade in your petrol car for an EV at the dealer, you get rid of it in one easy step, but it usually costs you money. A dealer’s trade-in offer is typically 10 to 20 percent below what the same car fetches in a private sale, according to marketplace Cars24. In 2026 that gap has widened for some cars as used petrol and diesel values slide. Instant online offers sit in between. Most people who sell privately get more, but they pay for it in time, test drives and scam messages.

The right choice depends on your car, your patience and when your rego falls due. A popular SUV in good condition can sell privately within days. An older diesel 4WD or a car with a few faults can sit online for months. This guide covers what the market is doing in late 2026, how each selling route compares and the paperwork every state requires.

Owners who recently made the switch tell a consistent story. Dealer trade-in offers often came in thousands below the private price. Some got good results from free local listings and nothing from paid ads, while others found the opposite. Several simply wanted the car gone before the next rego bill. All prices below are as of October 2026.

What has happened to used petrol car prices in 2026

Used car prices are falling, and petrol and diesel models are falling fastest. Carma’s Used Car Market Report found used prices 6.5 percent lower in the 12 months to September 2026. Some family SUVs dropped harder. The Nissan X-Trail fell 14.3 percent and the Subaru Forester 11.6 percent.

Data from Datium Insights, published in Pickles’ first-quarter 2026 report, showed petrol and diesel used values about 5 percent lower than a year earlier. Over the same period, its used EV index rose.

Demand hasn’t dried up. The Australian Automotive Dealer Association reported 258,127 used vehicle sales in September 2026, the third monthly rise in a row. The average car took 52.8 days to sell. Used EV sales grew fastest, up 29.8 percent on August.

Several forces are pushing in the same direction. Battery EVs outsold petrol cars in Australia for the first time in August 2026, taking 24.9 percent of new sales. Cheap new Chinese EVs undercut many used petrol cars on price. Fuel shocks earlier in the year sent buyers looking for EVs: diesel peaked at a national average of 319 cents a litre in the week to 12 April 2026, according to the Australian Institute of Petroleum.

Wholesale auctions tell a slightly different story. Cox Automotive’s Manheim reported wholesale prices up 6.1 percent year on year in the March quarter. Dealers are still buying stock, but they price trade-ins to leave room for a falling retail market. That’s one reason trade-in offers feel low.

What it means for you: a petrol car is unlikely to be worth more next year than it is now. If you’ve already ordered an EV, selling the old car soon usually beats waiting.

Trade in your petrol car for an EV, sell privately or take an instant offer?

The choice comes down to how much money you’ll give up to save time and hassle. Each route has a different trade-off.

Route	Typical price	Speed	Effort	Best for
Trade-in at the EV dealer	Lowest, often 10–20% below private	Same day as delivery	Minimal	Older or faulty cars, busy buyers
Instant online offer	Between trade-in and private	Days	Low: one inspection	Clean cars, sellers who hate tyre-kickers
Private sale	Highest	Days to months	High	Popular models in good condition
Wreckers	Scrap value	Same day	Minimal	Cars not worth repairing

Trade-in

A trade-in is the simplest route. You hand over the old car when you collect the new one. The dealer handles the paperwork and pays out any loan.

The cost is the price. Owners regularly report trade-in offers $5,000 to $8,500 below what they later sold for privately on mid-size SUVs. One owner of a diesel ute was told the dealer’s offer would be about half the private price. Dealers also bundle the trade with the new car, which can hide a weak offer behind a generous-looking discount. Consumer group CHOICE suggests asking for the net price you’ll pay after the trade-in, so you can compare deals on one number.

Tesla is running a $2,000 trade-in bonus on new and demo Model 3 and Model Y orders delivered by 31 December 2026. Reports differ on which variants it covers, so confirm with Tesla before you count on it. A bonus helps, but compare the total against an instant offer before you accept.

Instant online offers

Instant-offer services value your car online, inspect it once, and pay quickly. Carsales Instant Offer and Carma are the best-known; dealers make the final offer after an inspection. Payment usually lands within a business day, and they handle any finance payout.

Expect the offer to fall if the inspection finds missing service records, faults or damage. Owners who used these services generally described the price as fair rather than generous. One owner of a four-year-old hybrid SUV sold to an online buyer for about $8,000 less than they paid new, with the money in their account the next day.

Private sale

A private sale gets the most money, but only if you put in the work. The owners who sold quickly at full value had a few habits in common:

• They cleaned the car properly and photographed it in good light from every angle.
• They wrote a detailed description with the service history and any faults.
• They listed on more than one platform. Results varied: some sold on free local marketplaces within days, others found serious buyers only on paid listing sites.
• They priced slightly above their target and expected to negotiate.

Dealer-listed cars took an average of 85 days to sell in the year to September 2026, according to Carma’s report. Diesel 4WDs and less popular brands are the slowest movers. Several owners said theirs sat unsold for months even below the online valuation.

Wreckers and keeping the old car

If a car needs expensive repairs, a wrecker may be the honest answer. Quotes vary widely, so ring several. One owner of a 12-year-old diesel wagon with a failed transmission was offered $100 to $250 by the first wreckers called and $1,000 by another a day later.

Keeping the petrol car as a second vehicle costs more than people expect. In NSW, rego for a mid-size car costs an $84 fee plus private vehicle tax of $391 to $596, depending on weight, according to the NSW Government’s fee table. Fees rose 2.65 percent from 1 July 2026, partly offset by a one-off $100 discount on renewals until August 2027. The average green slip was $536 in 2024–25, according to SIRA. That’s roughly $1,000 to $1,200 a year before insurance, servicing and the car’s own depreciation. Keep it only if you’ll genuinely use it, for towing or a second driver.

The paperwork in each state

Every state requires the seller to notify the transport authority after a sale, and some require an inspection first. Miss the notice and you can be liable for the new owner’s tolls and fines.

State	Notice of disposal	Inspection needed to sell	Rego refund if you cancel instead
NSW	Within 14 days, free	No general requirement	Partial; unused vehicle tax only
VIC	Within 14 days	Roadworthy certificate for most cars	Unused rego, less a fee
QLD	Buyer transfers within 14 days	Safety certificate, $102.70	Unused rego and CTP, less a fee
SA	Free online notice	Special categories only	Unused rego and CTP, less a fee
WA	Seller within 7 days	None	Only if plates returned before sale
TAS	Within 7 days	None	Pro-rata, no fee
ACT	Online or in person	Buyer inspects cars over 6 years	Unused rego and insurance, less a fee
NT	Within 14 days	Inspection on transfer for cars 7+ years	Whole months remaining, less a fee

Queensland’s rules changed recently. You no longer need a safety certificate to advertise a registered car, but you do need one to sell it to anyone other than a dealer. The certificate lasts two months or 2,000 km for a private seller, and selling without one risks a fine of more than $700, according to the Queensland Government.

State links for lodging the notice: VicRoads, South Australia, Western Australia, Tasmania, ACT and the Northern Territory.

Timing your sale around rego helps. If renewal is a month or two away, selling first saves the bill. Several owners accepted a slightly lower price for exactly that reason.

Selling a car with finance or a novated lease

You can sell a car that still has finance owing, but the loan has to be cleared when ownership changes. Ask your lender for a payout letter showing the exact amount, including any early-exit fees. Tell buyers up front. Settle the loan at handover so the buyer’s money pays the lender and you receive the balance.

Buyers will check this. A PPSR search costs $2 online and shows whether money is owed, and whether the car is recorded as stolen or written off. Expect any sensible private buyer to run one. Dealers and instant-offer services pay the lender directly.

A petrol car on a novated lease is more complicated. At the end of the term you can pay the residual and sell the car yourself, trade it to cover the residual, or refinance. Ending a lease early means paying out the remaining payments and the residual, plus fees. One owner at the end of a three-year lease found the original dealer would buy the car back for a couple of thousand dollars less than the balloon. Our novated lease residual value guide explains how residuals are set.

If you’re moving to an EV on a novated lease, the timing matters. Under Treasury’s September 2026 draft law, EVs with a base value over $75,000 lose most of the FBT exemption on leases committed to from 1 April 2027. Our EV FBT exemption guide explains what changes.

Scams to watch for when selling privately

Private sellers are a favourite target for scammers, and the scams are predictable. Shopping scams were the most-reported loss category in 2025, with 12,248 people reporting losses totalling $10.8 million, according to the National Anti-Scam Centre’s March 2026 report.

The common car-selling scams:

• Overpayment: a buyer “accidentally” sends more than the price and asks you to refund the difference. The original payment later bounces or is reversed.
• Fake PayID upgrades: an email claims the payment is “on hold” until you pay a fee to upgrade your account. PayID doesn’t work that way.
• Shipping agents: an interstate buyer who can’t inspect the car wants you to pay a transport company they nominate.
• Fake test drives: someone takes the car for a “test drive” and doesn’t come back.

Hand over the car and keys only once cleared funds show in your own account, and check the name on any PayID matches the buyer. Go on every test drive and photograph the driver’s licence first. Scamwatch lists current overpayment scams and how to report one.

Owners who sold on free local listings consistently reported a flood of scam messages before a genuine buyer appeared. A phone call screens out most of them.

Making the numbers work on your EV

Whatever you get for the old car, compare the whole switch, not just the sale price. An EV that costs $5 per 100 km to charge at home, against $18 for a petrol SUV using 9 litres per 100 km at $2.00 a litre, saves about $1,950 a year over 15,000 km. That saving often outweighs the difference between a trade-in and a private sale within a couple of years.

Run your own figures with the petrol equivalent price calculator, and see our EV vs petrol total cost of ownership guide for the full picture. If you’re still choosing the car, start with our electric vehicles hub, and read our guide to how EVs hold their value before you sign.