Rental Yield: What to Check Before You Trust the Number

Updated 17 July 2026 · Property and home loans

A Rental Yield Calculator gives a fast answer, but the answer is only as good as what goes in. These are the mistakes we see most often with rental yield calculations in Australia, and how to avoid them.

1. Forgetting purchase costs

Stamp duty, conveyancing, inspections and moving can add several percent to the price.

2. Comparing headline rates only

Fees, offset accounts and flexibility on extra repayments can matter as much as the rate.

3. Assuming prices always rise

Property growth varies by location and period. Plan for flat or falling prices too.

4. Borrowing the maximum

Lenders test you at a higher rate, but your budget still needs room for rate rises, repairs and life changes.

5. Overlooking the detail that matters most here

Allow for a few weeks of vacancy a year. Two vacant weeks cuts rental income by about 4%.

How the gross rental yield changes with weekly rent

A common mistake is getting one input slightly wrong. Here is what happens to the gross rental yield when “Weekly rent ($)” is off by up to 20% in either direction, with everything else held steady.

Weekly rent ($)	Gross rental yield
480	3.84%
540	4.32%
600	4.8%
660	5.28%
720	5.76%

At 480 the result is 3.84%; at 720 it is 5.76%. If a small change in this input moves the answer a lot, it is worth double-checking that figure before you rely on the result.

A quick sense check

Gross yield = weekly rent × 52 ÷ price. Net yield subtracts rates, insurance, management and maintenance. With typical inputs the calculator returns gross rental yield of 4.8%. If your own result looks wildly different, check that each figure is in the right unit and period (weekly, monthly or yearly) before drawing conclusions.