Break-even Occupancy

What break-even occupancy means

Break-even occupancy estimates how much of a property's potential annual rent must be collected to cover the cash costs included in a model. Always state which costs are included. Covering operating costs alone gives a different answer from covering those costs plus loan repayments.

It is a cash-flow threshold under entered assumptions, not a recommended vacancy rate, a rent forecast or a guarantee that a property can pay its bills.

A model that allows for rent-linked fees

For a simple long-term rental scenario with one constant weekly rent:

Break-even occupancy = annual fixed cash costs / (weekly rent x 52 x (1 - rent-linked fee rate)) x 100

Here, fixed cash costs means costs held constant across the vacancy scenarios, not costs guaranteed never to change. They might include council rates, owner-paid water charges, insurance, strata, a maintenance allowance and the loan payments being modelled. Add any applicable land tax separately using the relevant jurisdiction and ownership details.

The rent-linked fee rate is the total fee charged as a proportion of rent actually collected. Use a GST-inclusive rate if that is the amount paid. Put letting fees, advertising and other separate charges in the annual cost estimate rather than assuming the ongoing percentage covers them.

The formula comes from setting collected rent, less the percentage fee and the fixed costs, equal to zero. It assumes no other income and no rent arrears during occupied periods.

Worked example

Suppose an illustrative rental has:

• rent of $700 per week, or $36,400 over 52 weeks;
• $28,000 of specified annual cash costs, including the chosen loan-payment assumption; and
• a management fee of 8% of rent collected, including GST.

At full occupancy, rent after that fee is $33,488. The break-even occupancy is $28,000 / $33,488 x 100 = 83.6%, rounded to one decimal place.

That is about 43.5 paid weeks out of the modelled 52. The remaining 8.5 weeks are a mathematical allowance, not a prediction of how long it will take to find a tenant.

At 90% paid occupancy, collected rent is $32,760 and the 8% fee is $2,620.80. After $28,000 of costs, the illustrative surplus is $2,139.20.

At 80%, the same calculation gives a $1,209.60 shortfall. An unexpected repair or a higher loan payment would change both results.

Important limits

A result above 100% means full rent collection cannot cover the included costs under those assumptions. A zero rent or a rent-linked fee of 100% makes this division unusable. Do not convert those cases into a reassuring zero-percent result.

Include principal repayments when checking the cash needed for a principal-and-interest loan. Do not confuse that cash budget with an interest-only estimate or a taxable rental profit. Depreciation is not a current cash payment. Tax treatment and after-tax results need separate assessment.

The model also assumes rent is received evenly enough to meet bills. Annual break-even does not prevent a cash shortage when insurance, repairs or a special levy falls due before rent is collected.

Related tools and reading

Use the Investment Property Yield Calculator to compare vacancy scenarios, recognising that its finance output uses an interest-only estimate. Use the Mortgage Repayment Calculator to estimate principal-and-interest payments for a separate cash budget.

The vacancy allowance explanation describes how to choose an input. The investment property expenses checklist helps gather the costs. Neither a local vacancy statistic nor national housing credit growth determines one property's break-even point.

Source and assumptions

ASIC Moneysmart: Buying an investment property, checked 5 September 2026, supports considering vacancy, ongoing costs and loan repayments. The formula above is an explicitly simplified cash-flow identity derived on this page, not an ASIC benchmark or an official lending rule. All example amounts are hypothetical.

General information and illustrative arithmetic only. This is not financial, investment, credit or tax advice, a return forecast or a recommendation about a property.

Last updated: 5 September 2026.