Smart ways to diversify when most of your wealth is your home

Most affluent Australian families have the bulk of their wealth tied up in the family home. That feels safe, but it’s still concentration risk: too much exposure to one asset class, in one city, often funded by one or two incomes. Diversifying when most of your net worth is in your home means deliberately shifting some of that equity into buffers and productive assets – without putting your roof or lifestyle at risk.

In this guide we’ll unpack how to measure your current exposure, set safe boundaries, and map two or three practical moves you can start this week.

When most of your wealth sits in the family home, you’re exposed to concentration risk.

1. Why “all in the family home” is a real risk

1.1 What concentration risk looks like in real life

Concentration risk is when a large share of your wealth is exposed to a single risk – in this case, Australian residential property and your personal income.

For many professional couples and business owners, the pattern looks like this:

• $2–4 million family home in Sydney or Melbourne
• Large mortgage, often $1–2.5 million
• Super balances building but still smaller than home equity
• Some cash in offset, little outside investment portfolio

That can mean 60–80% of your net worth is in one illiquid asset.

If the housing market stalls, your industry hits a rough patch, or the RBA keeps rates higher for longer, your wealth and your cashflow are both hit at the same time. Roy Morgan’s 2026 research shows around one‑third of owner‑occupier borrowers are now ‘At Risk’ of mortgage stress as higher rates and softer incomes bite.

1.2 Why relying on the home alone is dangerous

Putting most of your wealth into the family home creates several practical risks:

• Illiquidity – you can’t sell the front room to fund school fees or a business opportunity.
• Income mismatch – the home doesn’t pay you an income unless you rent a room or take in a lodger.
• Refinance risk – accessing equity depends on bank policies, your income, and valuations at that point in time.
• Retirement risk – a big, valuable house with little super can force late‑life downsizing under pressure.

The goal is not to feel guilty about your home. The goal is to use it as the foundation of a resilient balance sheet, not the whole structure.

1.3 A healthier long‑term wealth mix

There is no magic percentage that suits everyone, but for many affluent households a more resilient mix over time looks like:

• 40–60% of net worth in home equity
• 20–40% in superannuation
• 10–30% in other diversified investments (managed funds, ETFs, term deposits, investment property)
• 3–12 months of living and loan costs in cash or true offset buffers

If you’re sitting at 70–90% in home equity today, the question becomes: how do you migrate towards a better mix over the next 5–15 years without breaking your lifestyle?

2. Step one: map your real exposure this week

2.1 Build a simple before‑and‑after balance sheet

You can’t manage what you haven’t mapped. Take 30 minutes this week to list:

Assets

• Family home (conservative market value)
• Super accounts (each spouse)
• Investment properties
• Shares/ETFs/managed funds
• Business value (if saleable)
• Cash, offset, term deposits

Liabilities

• Home loans (all splits)
• Investment loans
• Business loans/overdrafts
• ATO and personal loans

Then calculate:

• Home equity % = (Home value – home loans secured to it) ÷ Net worth
• Liquid wealth % = (Cash + offset + listed investments + easily accessible super for over‑60s) ÷ Net worth

Do it twice: now, and what it would look like if property fell 10–15% and rates were 3% higher (APRA’s standard serviceability buffer).

2.2 Example: an Eastern Suburbs family

Let’s take a simplified worked example.

• Home value: $3.0m
• Home loan: $1.8m
• Super (both spouses): $600k
• Other investments: $150k
• Cash/offset: $100k

Net worth = $3.0m – $1.8m + $600k + $150k + $100k = $2.05m

• Home equity = $1.2m → 59% of net worth
• Super + investments + cash = $850k → 41% of net worth

That’s not terrible, but if super were only $300k and no other investments, home equity could be 75–80% of total wealth. That’s when diversification should climb the priority list.

2.3 Don’t forget business and guarantee risk

If you run a practice or business, your home may also be exposed through:

• Personal guarantees on leases and loans
• Using the home as security for business debt
• Cross‑collateralised loans that tie everything together

Unwinding risky links between business and home, as discussed in more depth in /insights/protect-dover-heights-home-when-you-run-business-practice, is often step zero in any diversification plan.

3. Buffers first: protect the roof over your head

3.1 How much buffer is enough?

Before talking about new investments, the priority is a safety margin around your existing loans.

A practical rule of thumb that comes up across our work is:

• 3–6 months of total living expenses and loan repayments in cash or true offset as a minimum
• 6–12 months if you’re highly geared, self‑employed or in a volatile industry

This aligns with the buffer guidance in multiple pieces of our framework, including /insights/how-much-equity-safely-release-home-australia and /insights/insurance-buffers-contingency-plans-when-you-restructure-loans.

3.2 A numerical buffer example

Say your household spends:

• $9,000 per month on living costs
• $7,000 per month on home loan repayments (tested at a rate 3% above today)

Total stressed monthly outgoings = $16,000.

A 6‑month buffer = $96,000 in cash or real offset (not redraw attached to a fixed loan you can’t easily access).

If your current offset is $30,000, your first diversification move is topping that up, not buying another property.

3.3 Insurance as part of diversification

Proper personal insurance (life, TPD, income protection, key person cover for business owners) doesn’t increase your investment diversification, but it does reduce your reliance on a single asset – the home – to bail you out in a crisis.

Think of it this way: the more of your wealth is in the house, the more you’re tempted to sell or refinance it when life goes sideways. Adequate cover lowers the chance you have to liquidate or gear the home at the worst possible time.