What are the tax benefits of voluntary super contributions in Australia?

Making voluntary contributions to your superannuation can significantly reduce your tax bill, and understanding the two types of contributions is key to making the most of the tax benefits available.

Concessional (pre-tax) contributions: These are contributions made from pre-tax income, including salary sacrifice arrangements with your employer, or personal contributions for which you claim a tax deduction. They are taxed at 15% inside super (the concessional contributions tax), rather than at your marginal rate of up to 47%. If your marginal tax rate is 32.5% or above, making concessional contributions saves you real money. For the 2024-25 financial year, the concessional contribution cap is A$30,000 (including your employer's Superannuation Guarantee contributions). Contributions above this cap are taxed at your marginal rate plus an excess concessional contributions charge.

Non-concessional (after-tax) contributions: These are contributions from your take-home pay on which you have already paid income tax. They attract no further tax inside super (no contributions tax). While there is no immediate tax deduction, earnings on those contributions are taxed at just 15% (or 0% in pension phase), which is advantageous for long-term wealth building. For 2024-25, the cap is A$120,000 per year, or up to A$360,000 over three years using the bring-forward rule if you are under age 75.

Carry-forward rule: If your total super balance is below A$500,000, you can carry forward unused concessional contribution cap amounts from the previous five financial years (from 2018-19 onwards) and make a larger concessional contribution in a later year.