A 23-year-old with two investment properties tends to attract more disbelief than admiration. The story always sounds the same — a small deposit, a regional one-bedder, then another, then somehow a third — and it sounds like either luck or a wealthy family. Sometimes it is. But more often it's a specific sequence of tax and lending mechanics that, when stacked in the right order, do exactly what they're designed to do. This is what's actually happening behind those headlines.
Rentvesting: the entry move
The first piece of the playbook is rentvesting — renting where you want to live, and buying where you can afford to invest. It's now the dominant first move for younger buyers. CommBank, citing its own lending data, says millennials and Gen Z account for more than 50% of all property investment purchases in Australia, and Australian Bureau of Statistics data shows the number of first-home buyers taking out investor loans grew faster in 2024 than traditional owner-occupier first-home buyer lending.
Why? Two reasons, both tax-related. Tenants don't pay tax on the rent they save by living somewhere cheaper. And as an investor, the holding costs of the property they buy — interest, rates, insurance, depreciation — become deductible against their salary. The same house, occupied by the same person as their home, gives neither benefit.
Negative gearing: the salary subsidy
An Australian investor whose rental property runs at a loss can deduct that loss against any other income — including their wages. The Treasury fact sheet describes it plainly: investors deduct net rental losses against other taxable income. That's negative gearing.
In year one of an investment property, most are negatively geared by design. Interest on a 90% loan is large; depreciation on a newish build is large; rent has not yet caught up. The result is a paper loss — often $5,000 to $15,000 — that comes straight off the investor's taxable income. At a 30% marginal rate plus 2% Medicare levy, a $10,000 loss returns about $3,200 in tax saved. At 39% (the 37% bracket plus Medicare) the same loss returns $3,900.
So the strategy depends on this loop: the wage absorbs the property's running cost, the tax system refunds a third of it back, and the rest is absorbed by ongoing rent and (the investor hopes) capital growth.
Lenders mortgage insurance: the leverage shortcut
Most young investors don't have a 20% deposit. The standard rule on home loans in Australia is that any loan above 80% of the property value attracts lenders mortgage insurance (LMI) — a one-off premium that protects the lender, not the borrower, if the loan defaults.
LMI is expensive — sometimes tens of thousands of dollars on a higher-LVR loan — but it lets buyers enter the market with as little as 5% down. From 1 October 2025, the expanded First Home Guarantee allows eligible first home buyers to take out a home loan with a deposit of as little as 5% without paying for LMI, with no income or property-price caps. The scheme only applies to owner-occupied purchases, not investment properties — so rentvestors making their first move as an investor don't qualify and either save the full 20%, capitalise LMI into the loan, or buy somewhere small enough that the maths still works.
The trade-off is simple: LMI lets you control a $500,000 asset with $25,000 of your own money instead of $100,000. If the property rises 10%, your $25,000 turns into roughly $75,000 of equity (the $50,000 gain plus the original deposit, minus LMI and costs). In a flat or falling market, the same leverage works the other way.
Equity recycling: how the second property happens
This is the move that converts one property into two. After 18 months to a few years, if the first property has risen in value, the investor goes back to the bank for a valuation. If the new valuation supports it, the bank will release some of that built-up equity as a separate loan, secured against the property.
The released equity isn't taxed. It's borrowed money, not income — drawing equity isn't a CGT event because the property hasn't been sold. That borrowed cash becomes the deposit on property number two.
Lenders treat the second purchase as a fresh deal, with its own LMI calculation and its own deposit requirement, but the deposit is now funded by the first property's growth instead of more out-of-pocket cash. Repeat the cycle and you get the headline.
The catch sits at the back end. Each new property adds a new loan. Each new loan adds new interest. And the interest is only deductible against rental income and salary — it isn't free. The investor's personal cash flow becomes a balancing act between rent received, interest paid, rates, repairs, and any property-management fees, with the tax refund propping up the bottom line.
The 50% CGT discount — for now
The long-term payoff sits in the capital gains tax discount. Under current rules, an Australian individual who holds a CGT asset for more than 12 months pays tax on only half of the eventual gain. That's the 50% CGT discount — and across multiple properties, it's the mechanic that turns paper growth into kept wealth.
The 2026 federal budget announced that the 50% CGT discount will be replaced from 1 July 2027 with a different system — cost-base indexation plus a 30% minimum tax on gains. Gains that built up before 1 July 2027 keep the existing discount; only the gain after that date is taxed under the new rules. This is announced, not yet law, and the design may change before it takes effect. We covered the change in detail in our 2026 federal budget article.
What can go wrong
The playbook only runs forwards when prices are rising. Several things can derail it.
- A flat market. No equity growth means no second deposit. The strategy stops where it stands.
- A rate rise. When mortgage rates climb, holding costs climb with them. Negative gearing losses get bigger — which generates more tax refunds, but only if the salary is large enough to absorb the loss. Carry-forward applies to unabsorbed losses, but cash flow is what kills portfolios, not tax.
- Vacancy. A property without a tenant still has interest, rates and insurance running. Three months of vacancy across two properties is enough to put many highly-leveraged young investors into stress.
- Settlement and legal costs. Stamp duty on a $500,000 investment purchase in NSW is around $18,000; in Victoria it's similar. Those costs aren't immediately deductible — they roll into the cost base for CGT, but they're cash out the door now.
- The rules change. The 2026 budget changes to CGT and (separately announced) negative gearing arrangements show how quickly the calculus can shift. Strategies that work on today's rules don't always survive the next budget.
The bottom line
None of the mechanics in the playbook are secret. Rentvesting, negative gearing, LMI-funded leverage, equity recycling and the 50% CGT discount are all features of the Australian tax and lending system as designed. What's changed is that information about them is now extremely accessible, and a generation locked out of owner-occupied buying in capital cities has reorganised those features into a sequence — buying first, living later — that older buyers never had to consider.
The headline "23-year-old with three properties" is real. It's also leverage on leverage on leverage, exposed to interest rates, vacancy, market direction and policy change. It's the same trade older property investors have always made — just earlier, with smaller deposits, and on a system designed to amplify both sides of whatever happens next.