Calculator
Rental Property Calculator
Rental Property Calculator
Taxes, insurance, maintenance, HOA, property management — exclude mortgage principal and interest.
Monthly Cash Flow
$65.17
Property Analysis
The property cash-flows $65.17/month — positive, but a 0.8% cash-on-cash return is thin after accounting for repairs, turnover, and your management time. The 6.2% cap rate and 11.5% first-year total return (with appreciation) improve the picture, yet the hurdle for most rental investors is 8%+ cash-on-cash. Pushing rent, trimming financing cost, or negotiating the price are the three levers worth testing in this calculator.
*Cash flow, cap rate and cash-on-cash figures exclude purchase costs such as stamp duty and legal fees, income tax and negative gearing effects, and land tax. Expenses vary by property, state and management arrangement. Educational only, not investment or tax advice.
Underwriting an Australian Rental Before You Bid
Australian residential property is the country's favourite investment — more than two million taxpayers own at least one rental — yet most buyers still decide with their heart and a broker's pre-approval rather than a spreadsheet. The result is a market famous for properties that lose money every month and hope to make it back in capital growth. That strategy can work, but it should be chosen deliberately, with the cash-flow truth priced in advance rather than discovered at the first interest-rate rise. A disciplined deal analysis answers four questions before you bid. What does the property actually earn once vacancy and expenses are counted? What is it worth as a yield — the cap rate that professional buyers use to compare across markets? What does it return on the cash you personally tip in, once a loan amplifies or drags on the result? And what does the growth assumption need to do for the whole thing to make sense? Australian specifics matter at every step: rents are quoted weekly but paid monthly, property management runs five to eight percent plus letting fees, council and water rates and strata levies bite monthly, and land tax looms above state thresholds. This calculator runs the full underwriting on any deal — enter the price, deposit, rate, rent and expenses, and see the monthly cash flow, cap rate, cash-on-cash return and ten-year projection before emotions get involved at the auction.
From Weekly Rent to Cash-on-Cash
The engine starts with effective income: monthly rent reduced by your vacancy allowance, because empty weeks, reletting costs and tenant turnover are recurring facts, not anomalies. Operating expenses — management commission, rates, insurance, strata and maintenance — are subtracted to reach net operating income (NOI), the property's raw earning power independent of how you finance it. Dividing NOI by the purchase price gives the capitalisation rate, the yield a buyer would earn paying all cash; it is the cleanest cross-market comparison because it ignores leverage and tax. Financing then enters: the deposit funds the purchase, the loan covers the rest, and the amortised repayment is deducted from NOI to give pre-tax cash flow — the money that lands in, or leaves, your account each month. Dividing annual cash flow by your total cash invested produces the cash-on-cash return, the number most relevant to a leveraged investor. Two Australian realities sit just outside these formulas but belong in your judgement: stamp duty and purchase costs are not included in the cash-invested base here, and the tax system can return part of any loss at your marginal rate under negative gearing while taxing positive cash flow as income. Growth compounds the property value at your assumed rate for a ten-year projection, but the cash-flow lines are where most Australian deals are actually won or lost.
Expert Insights
The Yield Gap Tells You Who Is Paying for the Growth
Compare the cap rate to your borrowing rate: when a property's yield sits well below the loan rate — the norm in Sydney and Melbourne, where gross yields run three to four percent — every leveraged dollar bleeds cash monthly and the investment only works if growth outruns the shortfall. Regional markets and some units invert the gap, paying you to hold while growth does less. Neither is wrong, but know which deal you are buying: negative-cash-flow growth plays need a wage to subsidise them and a rising market to justify the subsidy.
Strata Levies and Land Tax Are the Silent Deal-Breakers
Two expense lines kill more Australian unit purchases than interest rates do. Older apartment blocks can carry strata levies — and special levies for concrete repairs or cladding remediation — that add hundreds per month with no warning in the listing. And above each state's land tax threshold, investors pay an annual charge owners never mention at open homes. Model both honestly: a deal that looks tight with $600 of expenses may be deeply negative with a $40,000 special levy amortised in. Houses avoid levies but carry their full land value into the land tax calculation.
Cash-on-Cash Is Your Reality Check; Cap Rate Is Your Discipline
Cash-on-cash return answers 'what does my deposit earn this year?' and is the number to compare against simply buying an ASX index fund with the same money — if shares return eight percent with one click and the property returns two percent with tenants, vacancies and levies, the growth bet needs explicit justification. The cap rate answers a different question: what is the asset worth as a machine? Professional buyers walk away below roughly three percent in most Australian capitals unless there is a documented reason. Use both numbers, and let neither your agent nor your optimism fill in the blanks.
Actionable Tips
- 1
Convert Weekly Quotes Before You Compare
Australian rents are advertised weekly but paid in monthly cycles, and mixing the two is how buyers misjudge yields. Multiply weekly rent by 52 and divide by 12 for the true monthly figure — $600 per week is $2,600 per month, not $2,400. Enter that honest monthly number here, and use the same convention when comparing against the agent's appraisal so every deal on your shortlist is measured identically.
- 2
Build the Expense Line From Real Quotes
Before bidding, assemble actual numbers: a property management agreement at 5.5–7.7 percent plus letting fees, the council's rate notice for the suburb, an insurance quote for the dwelling type, the strata disclosure statement's current levies and sinking fund for units, and a maintenance allowance near one percent of value per year. Deals priced on listing-page optimism collapse under quoted costs; deals that survive real quotes are the ones worth owning through a rate cycle.
- 3
Stress-Test at Two Points Higher and a Vacancy Quarter
Enter the numbers again with the rate two percentage points higher and vacancy at ten percent — a realistic bad year. If cash flow stays survivable, the deal is robust to a normal cycle; if the shortfall becomes a monthly emergency, you have learned now what some investors learn at the first RBA hike. Australian lenders apply a serviceability buffer of around three points for the same reason: the loan must survive the world you will actually live in, not the one at application date.
Real-World Examples
Priya Chose the Regional Cash Cow Over the Prestige Suburb
Priya had the deposit for either a $780,000 house in a blue-chip Brisbane suburb or two $420,000 regional properties. The prestige house projected $700 a month negative; each regional property returned $180 a month positive with a cap rate near five percent. She bought the regional pair, and the combined positive cash flow funded a third deposit within four years while the portfolio grew at a slower but steadier rate. Her friends' prestige house grew faster on paper — but hers was paying her to hold it through every rate rise.
Marcus Nearly Bought the Levy Trap
Marcus fell for a $590,000 inner-city unit with strong rent and a glossy listing. The strata disclosure told a different story: a $38,000 special levy pending for facade repairs, on top of quarterly levies already at $3,100 a year. Modelled honestly, his 'tight but workable' margin became a $600-a-month hole. He walked, and the buyer who didn't spent two years funding remediation work. The lesson: the expense line you enter here must come from the disclosure documents, not the listing.
The Okafors Ran the Stress Test and Resized
The Okafor family planned to stretch to an $850,000 property on a 10 percent deposit. At two points above the going rate the shortfall hit $1,400 a month — more than their entire wage cushion. They resized to a $620,000 townhouse with a 20 percent deposit, avoiding LMI as well as the cash-flow cliff, and the stressed scenario showed a manageable $350 monthly gap their salaries absorbed without drama. Three years and one rate cycle later, the smaller deal was positive and they were borrowing against it for the next one.
Glossary of Terms
- Capitalisation Rate (Cap Rate)
- Net operating income divided by the property price — the unleveraged yield the property earns as an asset. The standard measure for comparing properties across markets, independent of financing and tax.
- Cash-on-Cash Return
- Annual pre-tax cash flow divided by the actual cash you invested. It measures what your deposit is genuinely earning each year once the loan's effect is included.
- Negative Gearing
- The Australian tax arrangement where a property's running costs and interest exceed its rent, and the loss is deducted against your other taxable income, reducing tax at your marginal rate.
Frequently Asked Questions
Everything you need to know about this topic.
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.