Good Debt vs Bad Debt — and the Smart Debt Most Australians Miss

The good debt vs bad debt question isn’t about the size of the loan or the rate on it. Context is everything — and most Australians stop at two categories when there are actually three. Bad. Good. And the one almost no one teaches: smart.

Ask ten Australian families to define good debt and you’ll get ten different answers. Some say a mortgage is always good. Others insist all debt is bad. Both are guessing, because the honest answer to the good debt vs bad debt question depends entirely on what the borrowed money is doing. Crucially, almost none of them will mention the third category that actually builds wealth: smart debt.

This matters more in 2026. In May, the Reserve Bank lifted the cash rate to 4.35%, the third rise this year, which means carrying the wrong debt now hurts more than it did. Therefore a clear framework for good debt vs bad debt — and the smart debt most families never reach — isn’t academic. It’s the difference between a household that compounds and one that treads water on a strong income.

Does it produce, or does it consume?

Forget the headline rate for a moment. The first test in any good debt vs bad debt decision is a simple one: does the borrowed money produce something, or consume something? Bad debt buys things that lose value the instant you own them. Good debt — like your mortgage — sits in between, building equity even without a tax deduction. Smart debt produces income or growth, and it’s often deductible on top.

Australia’s tax system happens to reward this exact distinction. Generally, interest on money borrowed to earn assessable income is deductible, while interest on private borrowing is not. The ATO sets out the rule plainly in its guidance on investment income deductions. In other words, the law tends to agree with the framework — and it quietly rewards smart debt over the other two.

Bad debt is the rung you climb off first, because none of it works for you. Credit cards, Buy Now Pay Later, car loans, and personal loans all fund things that lose value, and none of the interest is deductible. Crucially, at a 4.35% cash rate the carrying cost has climbed, so the case for clearing bad debt has never been stronger.

On a benchmark $280,000 household, bad-debt interest commonly runs around $375 a month — roughly $4,500 a year that buys no future asset. That figure isn’t a sign of recklessness. More often, it’s simply structural: small balances spread across several accounts, each feeling harmless on its own.

Why the home loan sits in its own rung

The family home loan refuses to fit neatly into bad or smart. On one hand, the interest on your own home isn’t deductible, which looks like bad debt. On the other hand, it builds equity, provides a roof, and forms the launch pad for nearly every later strategy. That’s why we call it good debt — necessary, manageable, and the foundation of everything that follows.

What keeps good debt working for you is how you handle it. First, an offset account reduces the interest you pay while keeping your cash accessible. Next comes the bridge to smart debt: returns from investments help pay down the home loan, the repayment builds equity, and that equity is redrawn as a deductible investment loan. As a result, non-deductible good debt gradually converts into deductible smart debt. Our piece on turning your mortgage into a quiet wealth engine walks through the loop in detail.

For couples in their 30s and 40s, this recycling approach generally takes priority over extra super contributions, because it builds an accessible asset base sooner. Closer to retirement, super does more of the work. To hear how a mortgage strategist structures this in practice, the Elevate Your Wealth episode on building wealth through property is worth your time.

Smart debt is the level most Australian families never quite reach. It’s deliberate, structured borrowing pointed at assets that grow or pay income — a diversified share portfolio, an income-producing property, your own business. The asset can grow, it can pay income, and the interest is generally deductible against that income. Consequently, the after-tax cost of smart debt is materially lower than the headline rate suggests.

However, smart doesn’t mean risk-free. Borrowing to invest amplifies both gains and losses, so asset quality and your capacity to hold through a downturn matter enormously. For that reason, smart debt belongs only on top of solid foundations: bad debt cleared, good debt under control, an emergency fund in place. If you want a grounded view of which assets actually suit borrowed money, our guide on choosing the right investment is a useful starting point.

Two couples on $275,000

Consider a couple earning $180,000 and $95,000 — a combined $275,000. Couple A directs surplus toward a credit card and a car loan — pure bad debt — carries no smart debt, and claims nothing at tax time. Couple B clears bad debt first, manages good debt with an offset, then recycles into a modest deductible investment loan. Same income, very different trajectory.

For a household at this level, the tax gap alone often sits between $8,000 and $14,000 a year — money lost simply because the structure stopped at bad and good debt instead of building any smart debt. Over ten years, that gap compounds into a deposit, a portfolio, or years off a working life. Put simply, the good debt vs bad debt question isn’t even the full question on its own — the smart-debt layer is what changes the outcome.

A framework only works if your money actually flows that way. That’s why we structure clients around four automatic accounts — Long Term for wealth and super, Short Term for known expenses and buffers, Discretionary for each partner with no reporting, and Bills for the day-to-day. An emergency fund sits beneath all four as a backstop, and everything is funded automatically the day after payday.

Within that structure, smart debt is serviced from the Long Term account, good debt (the mortgage) runs through Bills with an offset attached, and bad debt is wound down deliberately rather than left to drift. As a result, the bad-good-smart framework stops being a concept and becomes a system that runs itself.

What to do before June

With EOFY approaching, now is the moment to sort your debt onto the three rungs. First, list every balance you carry. Next, tag each as bad, good, or smart. Finally, check whether any deductible interest on smart debt deserves attention before 30 June — a question worth raising with your accountant or adviser this month, not in July.

If the good-debt grey zone is where you feel stuck, you’re in good company — the mortgage is the hardest rung to optimise alone. For the bigger picture on cash flow and where money quietly escapes, our four leaks draining dual-income families pairs naturally with this framework.

Prefer to listen? Catch this episode on the Two Incomes, One Plan podcast.

This article contains general information only and does not take into account your objectives, financial situation, or needs. It is not personal financial advice. CFV Advisory and Victor Idoko are authorised representatives operating under the relevant Australian Financial Services Licence. Consider seeking personal advice and reviewing the relevant disclosure documents before making any financial decision.