Buying or selling a car worth $10,000 or more? The ATO will be able to see it. The tax office has renewed its motor vehicle data-matching program for another five years, collecting records on about 2.5 million individuals a year from every state and territory registry.

The program covers 2025–26 to 2029–30. It means the details of a vehicle transfer at the registry counter can end up in the ATO's systems, where they are checked against what buyers and sellers report on their tax returns and Business statements.

What the ATO is collecting, and from where

According to the ATO's program protocol, updated on 4 August 2026, data will come from all eight vehicle registries: the ACT, New South Wales, the Northern Territory, Queensland, South Australia, Tasmania, Victoria and Western Australia.

It covers vehicles transferred or registered where the purchase price or Market Value is $10,000 or more. The ATO says that threshold was set after reviewing vehicle price trends and weighing costs and benefits.

The data items fall into two groups. Identification details include names, addresses, phone numbers, email addresses, dates of birth, and any ABN or ACN. Transaction details include the date and type of transaction, sale price, market value, vehicle details, registration number, vehicle identification number (VIN) and stamp duty information.

The ATO estimates the records will relate to about 2.5 million individuals each financial year. It collects the information under section 353-10 of Schedule 1 to the Taxation Administration Act 1953, which lets the Commissioner require information for tax purposes.

Why a car purchase can interest the tax office

A vehicle is one of the most visible Assets most people buy, so it offers a useful check on whether someone's spending matches their declared income.

The protocol lists the ATO's objectives. They include identifying people whose assets do not match their reported financial position, investigating "proxy" ownership where assets are held in someone else's name, and checking compliance with GST, Fringe Benefits tax (FBT), luxury car tax, fuel tax credits and income tax.

Proxy ownership is a particular focus. It refers to arrangements where an expensive asset is registered to a relative, friend or entity, while someone else pays for it and uses it. Registry data showing who holds a vehicle, combined with other ATO information, can help expose those arrangements.

Luxury car tax is another link. It applies to vehicles above set value thresholds, so registry data on sale prices and market values gives the ATO a way to test whether dealers and importers have accounted for it correctly.

The data is also used to find people and businesses who have not registered, lodged or paid, and to spot broader risks and trends.

This sits within a wider push. The ATO's latest tax gap estimates, for 2022–23, put tax lost to the shadow economy at about $25 billion. Small businesses accounted for the largest share of the overall gap, at $27.2 billion.

A worked example: how a mismatch might be flagged

The following examples are hypothetical and simplified.

Ben runs a cash-heavy trade business as a sole trader and reports Taxable Income of $48,000. In the same year, registry data shows him buying a vehicle with a market value of $95,000. That gap between spending and declared income is the kind of Wealth mismatch the program is designed to surface.

It does not mean Ben has done anything wrong. He may have used savings, taken out finance, received an inheritance or had a family member help. But it may prompt the ATO to ask questions.

A different risk involves GST. Suppose a GST-registered business buys a work vehicle for $55,000, including GST, and uses it only for business. It would generally be entitled to a GST Credit of $5,000, which is one-eleventh of the price, subject to the car limit that applies to passenger cars. Registry data can help the ATO check whether claims like this line up with actual purchases, and whether GST is reported when business vehicles are later sold.

What happens if the data doesn't match

Data-matching does not trigger automatic audits. The ATO uses the information to build risk profiles and to decide where education or compliance action may be needed. The protocol says the data also helps it deliver tailored education and products to taxpayers.

According to the protocol, where the ATO does contact someone about a discrepancy, they will have up to 28 days to verify the information and respond before any administrative action is taken.

The ATO also says that for people who are meeting their obligations, the data should reduce the likelihood of contact.

Records are kept for five years after the ATO receives the final verified data for each financial year.

One of 29 programs watching Australians' spending

Cars are not the only thing the ATO is tracking. Its list of data-matching programs, updated on 21 September 2026, names 29 programs.

They include lifestyle assets, real property transactions, share transactions, rental bonds, online selling, Sharing Economy accommodation, novated leases and private Health Insurance statements. Together, they give the ATO a detailed picture of how income is earned and spent.

The previous motor vehicle program ran from 2016–17 to 2024–25. Some online summaries still describe an older version covering about 1.5 million people a year, but the renewed program covers about 2.5 million.

What to watch between now and 2030

The program is not new law. It is an administrative exercise under existing powers, and the ATO says it published a gazette notice on the Federal Register of Legislation in the week starting 4 August 2026.

For individuals, the practical steps are simple. Keep records of how a vehicle was paid for, report any business use correctly, and remember that motor vehicle expenses and sales may need to appear in a tax return or business activity statement.

For businesses, vehicle purchases and sales can affect GST, FBT and income tax. Employers providing cars should also watch the government's announced, but not yet legislated, changes to the FBT exemption for electric cars, which are proposed to start from 1 April 2027. The data will continue to flow each year to 30 June 2030.

Anyone who receives an ATO letter about vehicle data should respond within the time given. A registered tax agent may help explain a discrepancy or correct an earlier return.