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Cash-on-Cash Return Calculator
Cash-on-Cash Return Calculator
Cash-on-Cash Return
4.92%
Return Analysis
After the 20% deposit of $80,000 and $12,000 in purchase costs, your total cash invested is $92,000. The property nets $28,800 of NOI, and after $24,271.41 of mortgage payments, you keep $4,528.59 a year — a 4.92% cash-on-cash return.
*Assumes the stated loan terms, full occupancy, and principal-and-interest financing only. Excludes vacancy beyond rent assumptions, income tax (negative/positive gearing), depreciation and appreciation. Educational only, not investment advice.
What Your Cash Actually Earns on a Leveraged Rental
A rental property's price is only partly yours — the mortgage funds the rest. Cash-on-cash return answers the question that matters to the investor property buyer: how much annual pre-tax cash flow does the property produce for every dollar of cash you personally put in, including the deposit and purchase costs? Buy a $650,000 house with a $130,000 deposit plus $30,000 of stamp duty, conveyancing and other costs and collect $8,000 of after-mortgage cash flow, and your money is earning about 5 per cent a year, even though the property itself may only yield around 4.5 per cent unleveraged. This is the metric that anchors Australian investment property decisions. A broad ASX share ETF has historically returned roughly 9–10 per cent a year with zero tenants or plumbing; any rental an investor buys with finance should produce a credible premium over passive alternatives to justify vacancies, maintenance and management. Cash-on-cash also exposes leverage's double edge: the same mortgage that magnifies a good purchase can drag a marginal one into negative territory when rates rise. With Australian investment loan rates hovering near 6 per cent, the difference between a property that cash flows and one that quietly bleeds often comes down to a few hundred dollars of monthly rent — exactly what this calculation surfaces before signing anything.
After-Debt Cash Flow Over Cash Invested
Two sides of a fraction. The denominator is every dollar of cash that leaves your account at settlement: the deposit (price times deposit percentage) plus purchase costs — stamp duty, conveyancing, pest and building inspections, loan establishment fees and any upfront insurance premiums. The numerator is built in layers: annual gross rent minus operating expenses (property management fees, council and water rates, insurance, maintenance allowance, strata/body corporate fees and a vacancy reserve) equals net operating income; then subtract annual debt service, the total of all twelve mortgage payments, to reach annual cash flow. Cash-on-Cash = Annual Cash Flow ÷ Total Cash Invested × 100. The mortgage payment uses the standard amortisation formula: P × r ÷ (1 − (1 + r)^−n), where P is the loan amount, r the monthly interest rate, and n the number of monthly payments. A $520,000 loan at 6.2 per cent over 30 years runs about $3,187 a month. Note what the ratio excludes: principal paydown, capital growth, negative gearing benefits and Division 40/43 depreciation — real wealth-builders for Australian landlords, but hard to guarantee. Cash-on-cash measures only the income you can bank on today: deals that clear your hurdle on cash flow alone get every tailwind for free.
Expert Insights
Set a Hurdle Above the Share Market, Not Above Zero
Any positive cash flow feels like a win until you remember what it competes against. An index-tracking ASX share ETF has averaged around 9–10 per cent a year with zero toilets and zero tenants. Most experienced Australian investors demand a cash-on-cash hurdle of 6 to 9 per cent to compensate for leverage risk, concentration and effort. If a deal returns 3 per cent cash-on-cash, you are taking landlord risk for less than the market pays passive owners. The hurdle rate is what turns 'this rents for more than the mortgage' into an actual investment decision.
Leverage Magnifies Both Directions — Model the Rate You'll Actually Get
The same 20 per cent deposit that lifts a 5 per cent cap-rate property to a healthy cash-on-cash can crush a 4.5 per cent one into negative returns at a higher loan rate. Run the calculator with your actual quoted rate, then with one percentage point more. If the return collapses across that range, the deal's viability is a rate bet, not a property bet. Professional buyers treat debt-service sensitivity as part of underwriting precisely because the mortgage rate is the variable they control least after settlement.
Cash-on-Cash Versus Cap Rate Tells the Leverage Story
Compare the two outputs this calculator produces: when cash-on-cash comfortably exceeds the cap rate, leverage is working — you borrowed at less than the property earns and pocketed the spread (positive leverage). When the loan rate exceeds the cap rate, leverage is negative: the mortgage costs more than the property earns, and every borrowed dollar reduces your return. In the current Australian rate environment, buying a 4 per cent cap-rate property with finance is structurally paying for the privilege of owning it. The spread between the two numbers is the cleanest read on whether financing is helping or hurting.
Actionable Tips
- 1
Underwrite Expenses With a Margin Before Trusting the Return
Real-estate-agent appraisals routinely understate costs — no line for vacancy, optimistic maintenance and management fees from the agent's own books. Re-run this calculator with operating expenses 15 per cent higher and check the agent's letting fee (typically 5–10 per cent of rent) and any body corporate levies. If the cash-on-cash return still clears your hurdle, the deal has a genuine margin of safety. If it goes negative, you have just learned what the glossy brochure was hiding, before it was your problem.
- 2
Include Stamp Duty in Every Comparison
Two otherwise identical purchases can rank differently once stamp duty enters the denominator. Stamp duty on a $650,000 Australian property often exceeds $25,000 — far more when foreign buyer surcharges apply in some states. A buyer who ignores purchase costs consistently overestimates returns. Every dollar that leaves your account at settlement, including conveyancing and inspections, belongs in the denominator of the cash-on-cash fraction.
- 3
Re-Run the Numbers Every Time the Loan Terms Change
A quarter-point rate difference, a shift from 30 to 25 years, or switching between interest-only and principal-and-interest all move annual debt service by hundreds or thousands — enough to flip a deal across your hurdle. Before final finance approval, rebuild the calculation with the exact terms on the loan offer. The same discipline applies at refinance: when rates fall or your equity rises, re-run the math and capture the improved cash-on-cash by refinancing, or confirm the current loan is still the best structure.
Real-World Examples
Angela Walked Away From a 'Cash-Flowing' Listing
Angela found a suburban investment house listed with a projected 7.9 per cent cash-on-cash return — until she rebuilt the inputs: the insurance quote was 40 per cent higher than the listing claimed, the property manager quoted 8 per cent instead of the assumed 5.5, and council rates were rising. Her version of the calculator returned 4.1 per cent against a 6.3 per cent loan — negative leverage. She passed; three months later the property sat with a tenant turnover and a price cut. The spreadsheet she walked away with was worth more than the keys.
The Garcias Found Their Spread in a Bigger Deposit
The Garcias had extra cash and were choosing between two deposit sizes on a $440,000 unit. At 20 per cent deposit their cash-on-cash was 4.2 per cent; at 25 per cent it rose to 5.1 per cent because the smaller loan cut debt service faster than the extra invested cash reduced the return. The loan rate of 6.5 per cent sat above the unit's 5.4 per cent cap, so every dollar of mortgage was costing them. They put down 25 per cent, got closer to their hurdle, and used the freed monthly cash flow to accelerate their next purchase.
Tom's Duplex Taught Him the Tailwind Side
Tom bought a $560,000 regional duplex with 30 per cent deposit at 6.4 per cent, banking on a 5.8 per cent cash-on-cash return and no more. Over four years, rents climbed 16 per cent with no change to his fixed payment, lifting his cash-on-cash on original cost past 7 per cent while the loan paid down $46,000 and the property appreciated modestly. The cash flow got him in the door; the fixed mortgage converted every rent review directly into return. That asymmetry is the reason he now owns three properties.
Glossary of Terms
- Cash-on-Cash Return
- Annual pre-tax cash flow divided by total cash invested (deposit plus stamp duty and purchase costs) — the current income yield on your own money in a financed purchase.
- Debt Service
- The total of all mortgage payments in a year, principal and interest combined, subtracted from net operating income to reach cash flow.
- Positive Leverage
- When a property earns more than its mortgage costs, so borrowed money raises the investor's cash return above the unleveraged cap rate.
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Ivy Sinclair-Wren
Financial Chaos Analyst
Ivy Sinclair-Wren is a Financial Chaos Analyst covering investing, AI, wealth psychology, and the emotional consequences of opening finance apps during market crashes. Based in Melbourne, she specializes in demystifying the Australian tax code and helping users navigate the intersection of spreadsheet logic and human irrationality.