I'm a small business owner but my income is designated as personal services income. I have an arrangement with the ATO to settle my tax at the end of each tax year. This year my income will be around $32,000 taxable, so I'm eligible for full pre-tax and after-tax co-contributions. I'm about to put a lump sum into my superannuation, let's say $1000 - with my main aim to maximise the government co-contribution. Option A is to put it in as pre-tax. I pay 15% tax return, but get it back from the government via the low income superannuation contribution. I pay no income tax on the $1000, saving $190 (19% marginal tax rate). Net benefit is $190 in my pocket. If I put that in my super instead the total amount is about $1190 in super contributions (ignoring the flow on effects for next year). Option B is to make it an after-tax contribution, where I will pay around $190 income tax (19% marginal tax rate) on the $1000, but get $500 (50c in the dollar) government super co-contribution. Net benefit is $310 ($500-$190) all in my super. Total of $1500 in super contributions. Seems like B is a no-brainer, but am I missing something here?