How Underinsured Are Australians, Really?

🔍 What "underinsurance" actually means🔗

Most Australians assume they're covered. They've got life insurance through super, or they took out a home policy years ago, and they've been paying the premiums ever since. Job done, right?

Not quite. Having insurance and having enough insurance are two very different things, and millions of Australians fall into the gap between them without realising it until something goes wrong.

You're underinsured when the cover you have wouldn't actually cover the real cost of a claim. Your policy still pays out, just not enough. The gap between what you receive and what you actually need lands on you.

There are two distinct versions of this problem in Australia:

• Life and income protection underinsurance is about what happens to your family's finances if you die, become permanently disabled, or can't work due to illness or injury. Most Australians have some life insurance, usually through super, but the dollar amount is often a fraction of what a family would genuinely need.
• Home and contents underinsurance is about whether your policy would actually cover the cost of rebuilding your home or replacing your belongings if they were destroyed. The sum insured on most policies was set years ago and hasn't kept pace with rising construction costs or lifestyle changes.

🎯 The essential: Both problems are widespread, both are largely invisible until claim time, and both are almost entirely preventable with an hour or two of checking. Snowball Invest is an educational site, not an insurer or broker, so nothing below is a sales pitch, it's a guide to the questions worth asking yourself.

❤️ The life insurance & income protection underinsurance problem🔗

The numbers here are bigger than most people expect.

According to research commissioned by the Financial Services Council and published in its 2022 Australia's Life Underinsurance Gap report, approximately 1 million Australians are underinsured for death and TPD cover, and around 3.4 million are underinsured for income protection.

These aren't people with no insurance. They're people whose cover would leave a meaningful shortfall, a real gap between what they'd receive and what their family would actually need.

The super default trap. Here's where it gets uncomfortable. Most Australians do have life insurance, but it's the default cover sitting inside their super fund, and most people have never looked at the actual dollar amount.

Rice Warner's 2015 research (worth flagging clearly as dated, construction and living costs have moved a long way since) found that a typical 30-year-old with children might need around $680,000 in life cover, while the typical default super fund cover at the time was only around $200,000, roughly 30% of what was actually needed. The gap had narrowed somewhat by 2005 compared to earlier defaults, but Rice Warner's follow-up 2020 research found the underinsurance gap had actually widened again, partly driven by legislative changes that removed default insurance from inactive accounts and low-balance accounts under $6,000, a reform that helped some members but left others without any cover at all.

The mechanism behind all of this is simple. People accept the default cover when they join a super fund, or take out a standalone policy at some point, and then never revisit it. Meanwhile, life moves on: income grows, a mortgage gets taken out, kids arrive, the mortgage grows. The cover stays the same. The need doesn't.

We've written a full guide to life insurance in Australia if you want the basics, and a separate article on how much life insurance you actually need if you want to work through the numbers for your own situation. If you're specifically thinking about income replacement, our income protection insurance guide covers how that works in detail. And if you're weighing up whether to keep what's in your super or go standalone, insurance through super vs standalone walks through the real trade-offs.

🏠 The home & contents underinsurance problem🔗

This one is arguably even more widespread, and the consequences can be just as serious.

The scale of the problem. A 2024 analysis of more than 2,000 reports by MCG Quantity Surveyors found Australian residential properties are underinsured by an average of 18%. That figure is best treated as a secondary citation here, it's the number reported in The Australia Institute's February 2025 polling brief, which in turn attributes it to earlier media coverage of MCG's analysis, rather than a primary MCG report we can link to directly.

The same Australia Institute polling brief found that 19% of Australians say their home is under or uninsured, and 29% say the same about their contents. With roughly 7.5 million owner-occupied dwellings in Australia, 19% would represent well over a million homes, though that's our own extrapolation from the survey percentage, not a figure the report states directly.

The same report also cites a 2024 Compare the Market survey finding that 32.8% of home and contents policyholders were at risk of underinsurance because they'd guessed the value of their insured items rather than calculating it, and a 2025 Compare the Market survey finding that 72.1% of households hadn't updated their contents insurance since buying a major household item. Both of those are cited via the Australia Institute report rather than sourced directly from Compare the Market's own publications, worth knowing if you want to chase the primary data yourself.

Why it happens. Two things drive home and contents underinsurance, and they often work together. First, people set a sum insured and never update it. Construction costs have risen significantly in Australia since COVID, supply chain disruptions, labour shortages, and materials price increases all pushed rebuild costs up sharply, so a sum insured that was adequate in 2019 may be materially short today. Second, people insure for market value instead of rebuild cost. Market value, what you'd sell the house for, includes the land. Rebuild cost is just the structure: labour, materials, demolition, site clearance, architect fees, council approvals. Your land doesn't burn down. Your house does.

The average clause, and why it matters. This is the part that catches people off guard most, and it's worth understanding clearly. Some home insurance policies include what is called an average clause (sometimes called a coinsurance clause). If your home is insured for significantly less than its true rebuild cost, the insurer may only pay out a proportional amount of any claim, not just cap it at the sum insured.

Example: your home would cost $800,000 to rebuild. You've insured it for $600,000, 75% of the true value. Under an average clause, even a partial loss claim of $100,000 might only pay out $75,000 (75% of the claim), because you've effectively self-insured the remaining 25%.

We've written a full guide to home and contents insurance in Australia if you want to go deeper on how these policies actually work.

🧠 Why underinsurance is so common🔗

The numbers are striking. The more interesting question is why this keeps happening.

• Set-and-forget mentality. Insurance feels done once you have it. Taking out a policy is an active decision. Reviewing it every year, actually checking the numbers, takes effort with no immediate reward. Most people don't do it.
• Optimism bias. "It won't happen to me," or "if it does, it probably won't be that bad." That's human nature, not stupidity, but it's a poor basis for financial planning.
• Cost pressure. Some people deliberately underinsure to lower their premiums. It's a rational short-term calculation with a potentially serious long-term downside. Saving $200 a year on premiums by insuring for $100,000 less than you need is a bad trade if you ever have to claim.
• Complexity. Calculating the correct rebuild cost for a home is genuinely hard. It requires knowing construction costs per square metre for your area, plus site-specific factors, demolition costs, architect fees, and council requirements. Most people don't have that knowledge, and online calculators from different insurers can produce quite different estimates for the same property.
• The super illusion. Default super insurance feels like "proper" cover. It's automatic, it's there, and nobody told you it might not be enough. The gap between what's in your super and what your family would actually need stays invisible until it isn't.

⚠️ What happens when you're underinsured at claim time🔗

Let's make this concrete.

For life insurance, the shortfall falls directly on the people left behind. The mortgage doesn't get paid off. Income replacement runs out earlier than it should. Education costs for kids don't get covered. The gap between what the policy pays and what the family needed is real, immediate, and often arrives at the worst possible moment.

For home insurance, even without an average clause, if your sum insured is $600,000 but the rebuild costs $800,000, you're personally funding the $200,000 gap, potentially while displaced, dealing with a natural disaster, and navigating a claims process at the same time. If your policy does have an average clause and you're below the threshold, partial loss claims get proportionally reduced on top of that.

The point isn't to be alarmist. It's to make the consequence feel real enough to be worth a few hours of your time now, rather than finding out the hard way later.

✅ Your underinsurance checklist🔗

Use this as a starting point. It's not financial advice, it's a set of questions worth asking yourself and, where relevant, a financial adviser.

Life & income protection: questions to ask

• Do I have life insurance? Is it through super, standalone, or both?
• What is my actual sum insured for death cover? Does it cover mortgage payoff, several years of income replacement, and education costs for the kids?
• Do I have income protection? What's the benefit period and waiting period?
• When did I last review my cover? Has my income, mortgage, or family situation changed since?
• If I have insurance through super, have I actually checked the dollar amount, not just assumed it's "enough"?

Home & contents: questions to ask

• Is my home insured for rebuild cost, not market value?
• When did I last update my sum insured? Have construction costs risen since?
• Does my policy have an average clause? Check the PDS under "underinsurance," "average," or "coinsurance."
• Have I done a proper contents inventory, or did I just guess?
• Have I made major purchases or renovations since I last updated my policy?

❓ Frequently asked questions🔗