Free calculator

Property Cash Flow Calculator

See the after-tax weekly position on any property — including depreciation, interest, and your marginal tax rate.

How this calculator works

Methodology and assumptions

  • · Marginal tax rate default 40% (specialist average); adjustable to actual MTR
  • · Depreciation modelled at typical 2.5% capital works + plant and equipment estimates
  • · Interest deductibility assumed for investment loans (not owner-occupied)
  • · Rental income assumed 4–4.5% gross yield (capital city investment-grade typical)
  • · Ownership costs include rates, insurance, body corporate, property management

Important: Property investment carries risk — values may rise or fall. Past performance is not a reliable indicator of future performance. Rental yields, depreciation schedules, and ownership costs vary materially by location and property type. Personal advice required for any property investment decision.

Frequently asked questions

Common questions

Why does the after-tax position matter more than yield? +

A 4% gross yield property at -$200/week pre-tax can become -$80/week after-tax when 40% marginal rate is applied to losses. The cash you need to fund each week is the after-tax number, not the gross.

What is "negative gearing" really? +

Negative gearing means your investment expenses (interest + depreciation + ownership costs) exceed your rental income. The net loss reduces your taxable income, lowering your tax bill — the ATO effectively shares your loss at your marginal rate.

Is depreciation always claimable? +

Depreciation on the building (capital works at 2.5% per year for 40 years) is generally claimable on properties built after 1987. Plant and equipment depreciation is restricted on second-hand properties bought after May 2017. A QS report is required.

What about land tax? +

Land tax varies significantly by state. NSW levies it on investment property above thresholds. Queensland and Victoria have different rules. The calculator includes a representative estimate but actual land tax should be confirmed for the specific property.

Does interest-only vs principal-and-interest change the calculation? +

Interest-only loans have lower repayments and higher tax-deductible interest. The trade-off: no principal reduction. Most doctors structure investment loans as interest-only while maintaining offset accounts for flexibility.

Beyond the calculator

Want personal advice on your situation?

The calculator gives an indicative answer. A 15-minute consultation gives you specific guidance for your facts. Free, no obligation.

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General Advice Warning. The information and calculator output on this page is general information only and does not take into account your personal objectives, financial situation, or needs. Calculator outputs are illustrative and based on stated assumptions. Actual outcomes vary materially. Before making any financial, tax, credit, or property decision, seek personal advice from a qualified adviser. Tax law and lender criteria change. Past performance is not a reliable indicator of future performance.