Superannuation Balance Mistakes Australians Make and How to Avoid Them

Updated 29 June 2026 · Super and retirement

A Superannuation Balance Projection gives a fast answer, but the answer is only as good as what goes in. These are the mistakes we see most often with superannuation balance calculations in Australia, and how to avoid them.

1. Leaving multiple accounts open

Each account charges fees and may carry insurance premiums. Consolidating through myGov is usually quick.

2. Ignoring fees

A fee difference of 1% a year looks tiny but can reduce a balance by six figures over a working life.

3. Going over the contribution caps

Excess concessional contributions are taxed at your marginal rate, and the cap includes your employer’s contributions.

4. Not checking your employer pays super

Check your fund statements or myGov to confirm contributions arrive. Unpaid super can be reported to the ATO.

5. Overlooking the detail that matters most here

A 1% difference in fees over 30 years can cost tens of thousands of dollars. Compare funds on the ATO YourSuper tool.

How the projected balance changes with salary

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

Salary ($)	Projected balance
72,000	$867,777.88
81,000	$940,353.29
90,000	$1,012,928.71
99,000	$1,085,504.12
108,000	$1,158,079.54

At 72,000 the result is $867,777.88; at 108,000 it is $1,158,079.54. 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

Each year: balance × (1 + return − fees) + employer contributions after 15% tax. The result is also shown in today’s dollars. With typical inputs the calculator returns projected balance of $1,012,928.71. 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.