Australia Superannuation: the 12% that never appears on your payslip

Superannuation is Australia's compulsory retirement savings system. Employers must pay a percentage of ordinary time earnings into a fund of the employee's choosing, and that percentage, the Superannuation Guarantee, now stands at 12%.

The crucial structural point is that it is paid on top of salary, not deducted from it. An Australian payslip showing A$90,000 gross and A$70,412 net, as set out in what A$90,000 leaves after tax, is also generating A$10,800 a year of superannuation that appears nowhere in either figure.

What the guarantee is worth

Contributions are taxed at 15% on the way in, against a marginal income tax rate of 32% at A$90,000 and 39% above A$135,000. That gap is the entire tax advantage, and it is substantial: the same money taken as salary at A$120,000 would have arrived as roughly A$9,790 in the bank rather than A$12,240 in the fund.

Earnings inside the fund are taxed at 15% as well, against marginal rates outside it. Over a thirty year working life the compounding difference between 15% and 39% on investment returns dwarfs the contribution advantage.

Concessional contributions and the cap

Employer contributions, salary sacrifice and personal deductible contributions all count towards the same annual concessional cap, currently A$30,000. Someone on A$180,000 receiving A$21,600 in employer super has only A$8,400 of room left.

Two refinements matter. Unused cap from the previous five years can be carried forward if your total super balance is below A$500,000, which is useful for anyone returning from parental leave or from working overseas. And exceeding the cap is not catastrophic: the excess is taxed at your marginal rate with an interest charge, so it costs you the advantage rather than creating a penalty.

Division 293

Above an income threshold of A$250,000, including concessional contributions, an additional 15% tax applies to contributions, taking the effective rate to 30%. Against a 47% marginal rate the arrangement remains worthwhile, but the margin narrows considerably.

The threshold counts income plus contributions together, so someone on A$240,000 with employer super is already over it. The assessment arrives separately from the normal return, months later, which catches people out.

Salary sacrifice into super

Employees can direct part of pre-tax salary into super, within the concessional cap. At a 32% marginal rate the saving is 17 cents in the dollar; at 39% it is 24 cents; at 47% it is 32 cents.

There is a specifically Australian trap here. HELP and HECS student loan repayments are calculated on repayment income, which adds salary sacrificed super back in. Sacrificing to reduce a student loan repayment does not work, and anyone told otherwise has been misinformed. The general logic of pre-tax contributions is set out in the guide to salary sacrifice.

Choosing a fund, which matters more than the tax

Fees compound in exactly the same way returns do. A one percentage point difference in annual fees across a forty year career costs something in the order of a fifth of the final balance.

• Consolidate accounts. Multiple funds mean multiple sets of fees and often multiple insurance premiums for cover you cannot claim twice.
• Check the insurance. Default death and disability cover inside super is deducted from the balance. It is frequently worth having and occasionally worth cancelling.
• Check the investment option. Balanced defaults are conservative for someone thirty years from retirement and the difference in expected return is larger than any fee saving.

Leaving Australia

Temporary residents who depart permanently can claim a Departing Australia Superannuation Payment, but the withholding on it is heavy, typically 35% on the taxed element and 65% on amounts attributable to a working holiday visa. Permanent residents and citizens cannot claim it at all; the money stays preserved until retirement age regardless of where they live.

This is a genuine difference from Singapore's CPF, which similarly locks money away but through employee deductions rather than employer payments on top, as the CPF guide explains, and from New Zealand's KiwiSaver, which is opt-out rather than compulsory and considerably smaller, covered in the KiwiSaver guide.

What this means for comparing offers

A package quoted as A$120,000 plus super is worth A$134,400 of employer cost. A package quoted as A$120,000 including super is A$107,143 of salary plus A$12,857 of super. These are meaningfully different offers and the phrasing is easy to miss.

Against a British or German offer, the Australian figure needs superannuation added back before the comparison means anything, precisely because those systems fund retirement through employee deductions that do appear on the payslip. That correction is what makes the UK versus Australia comparison less lopsided than the raw net figures suggest.