Super Co-contribution Mistakes Australians Make and How to Avoid Them

Updated 3 July 2026 · Super and retirement

A Super Co-contribution 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 super co-contribution 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

At least 10% of your income must come from employment or a business to be eligible.

How the government co-contribution changes with total income

A common mistake is getting one input slightly wrong. Here is what happens to the government co-contribution when “Total income ($)” is off by up to 20% in either direction, with everything else held steady.

Total income ($)	Government co-contribution
40,000	$500.00
45,000	$500.00
50,000	$416.27
55,000	$249.60
60,000	$82.93

At 40,000 the result is $500.00; at 60,000 it is $82.93. 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

The government adds 50 cents per dollar up to $500. The maximum falls evenly to zero between the lower and upper thresholds (update these each year). With typical inputs the calculator returns government co-contribution of $416.27. 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.