Briana McDonagh — Mortgage Adviser

Rental yield calculator

Work out whether a rental property stacks up. Enter the mortgage, rates, insurance and other costs against the rent you could charge, and see your real weekly cash flow.

Income and costs

Rental income

Expected weekly rent

Mortgage

Mortgage repayment

Frequency

Ongoing costs

Council rates

Frequency

Insurance

Frequency

Other costs — maintenance, body corporate, etc.

Frequency

Property management

Management fee

Frequency

Management fee (%)

Optional

Property purchase price — adds a gross yield %

Income vs costs (weekly)

Rent

Costs

Weekly cost breakdown

Item	Weekly

This is an estimate for illustration only and reflects cash flow, not your tax position. It doesn't account for depreciation, interest deductibility, vacancy periods, or one-off costs like a new roof or a broken hot water cylinder. Get in touch for an accurate assessment, and speak to your accountant about the tax side.

Reading these numbers

Gross yield tells you how a property's rent compares to its price, useful for quickly comparing different properties. Net weekly cash flow tells you what actually lands in or leaves your pocket each week once every cost is accounted for. A property can look great on yield and still be cash-flow negative once rates, insurance, management and the mortgage are all in, so it's worth checking both.

Being cash-flow negative isn't automatically a bad thing. Some investors take on a shortfall deliberately, planning for the property's value to grow over time or expecting rent to catch up. What matters is going in with your eyes open about what it actually costs you each week, not finding out by surprise.

Things worth thinking through

Is your mortgage figure interest-only or principal and interest? If it's interest-only, remember that repayment will step up once the interest-only period ends and you start paying down the balance, so today's cash flow may not be next year's cash flow.

Rent doesn't stay fixed and neither do interest rates. A property that's cash-flow neutral today could look different after your next refix, or if the property sits vacant between tenants for a few weeks.

This calculator gives you a starting point, not financial advice. It doesn't know your income, your other lending, your goals, or how this property fits into your wider financial picture. Talk to a mortgage adviser before making a decision based on these numbers, we can look at your actual situation and structure things properly around it.