How High‑Income Professionals Can Use Gearing To Build A Portfolio

High‑income professionals can use gearing to build a serious property portfolio, but the rules are changing. You can no longer rely on generous negative gearing and capital gains tax (CGT) discounts to mop up mistakes.

In plain English: gearing is borrowing to invest. For a doctor, lawyer, executive or senior public servant on a high marginal tax rate, gearing can accelerate wealth – if you cap risk, build in buffers and assume tax benefits will be weaker after the 2026–27 reforms.

This guide gives you a decision‑grade framework you can use this week: how much to gear, what to buy, how to structure loans, and how to adapt to the new tax settings.

Gearing uses your income and borrowing power to accelerate property wealth – if you cap risk and protect cashflow.

1. Why high‑income professionals are different – and what that means for gearing

High‑income professionals (surgeons, GPs, specialists, partners, senior associates, executives, consultants and senior tech/finance staff) have a few common features:

1. Income is high – but often volatile and heavily taxed.
2. Career and family demands are intense – time and headspace are limited.
3. Lifestyle costs tend to creep up quickly.
4. Your future earning power is a major asset worth protecting.

These realities change how you should think about gearing.

1.1 Your real “investable surplus” – not your headline salary

A $400,000 package sounds huge. But after tax, super, school fees, mortgage, practice or career costs and lifestyle, your real surplus can be surprisingly modest.

A simple rule of thumb:

• Try to keep total housing + investment loan repayments (after tax) within 30–35% of your net household income.
• Once you push beyond ~40%, financial stress and forced decisions become much more likely, especially if rates rise or income dips (HEM‑style benchmarks and ABS data consistently link >30–40% housing costs with higher stress).

This is one reason high‑income professionals should run the numbers much more conservatively than the bank’s maximum borrowing limit.

1.2 Why chasing tax deductions is dangerous now

Under the 2026–27 Federal Budget measures, several big changes are coming:

• The 50% CGT discount for individuals and trusts is being abolished from 1 July 2027, replaced with CPI indexation and a 30% minimum tax on most capital gains.
• Negative gearing for residential property is being tightened, with losses increasingly quarantined and new purchases of established property after mid‑2026 getting far less favourable treatment.

For high‑income investors, this means:

• Relying on big tax refunds from rental losses is risky; rules are tightening and may tighten again.
• You should assess every deal on pre‑tax cashflow and quality, with tax benefits treated as upside, not the core rationale (see also /insights/self-employed-business-owners-high-income-professionals-negative-gearing-cgt-strategy).

2. How much gearing is sensible for a high‑income professional?

Rather than asking “How many properties can I accumulate?”, a better question is:

“What level of debt can my household safely carry through a full interest rate and career cycle?”

2.1 Key guardrails to protect your lifestyle

Use these as practical ceilings, not targets:

• Total LVR (loan‑to‑value ratio) across your home plus investments: aim to stay ≤70–75% once your portfolio is established.
• On new individual investment purchases, 80% LVR is often reasonable if you have strong buffers.
• Keep liquid buffers equal to 6–12 months of all loan repayments and living costs in offset accounts.
• Stress‑test at 3% above current rates (APRA style) and under halved tax benefits from negative gearing and CGT.

2.2 A worked example: surgeon couple building a portfolio

Assumptions (illustrative only):

• Household income: $600,000 before tax.
• Net income (after tax, before super): ~ $360,000.
• Existing home worth $2.5m, home loan $1.5m (60% LVR).

They’re considering a $1.2m investment unit at 80% LVR:

• Investment loan: $960,000, interest‑only at 6.5% p.a. (illustrative).
• Interest: $62,400 p.a.
• Rent: 3.5% gross yield = $42,000 p.a.
• Expenses (strata, rates, insurance, maintenance, management): say $14,000.

Pre‑tax cashflow:

• Rent: $42,000
• Less expenses: $14,000
• Less interest: $62,400
• Net cash loss: $34,400 p.a. (~$2,867 per month) before tax.

On a high marginal tax rate, you might currently get a significant portion of that loss back at tax time – but post‑reforms, that benefit may be substantially reduced.

Question to ask: “Would we still be comfortable carrying a $34,000 p.a. cash loss for several years if the tax benefits halved?”

If the answer is no, this is too aggressively geared – regardless of what a property spruiker or even your accountant says.