What to Do With a Work Bonus or Windfall
A bonus or unexpected windfall is one of the few moments where a single decision can meaningfully move your finances forward — worth a deliberate plan rather than default spending.
How a Bonus Is Actually Taxed
A bonus is taxed as ordinary income through PAYG withholding, at your marginal tax rate — but because it's often paid as a lump sum in one pay cycle, your payroll system may withhold more than your final annual tax bill actually requires, which typically evens out as a refund when you lodge your tax return. If a bonus pushes you into a higher tax bracket for that portion of income, directing some of it into super via salary sacrifice (taxed at 15% instead of your marginal rate) can reduce the immediate tax hit.
Where to Direct It First
Before anything else, check whether your emergency fund (see the guide on this site) is fully funded and any high-interest debt is cleared — a bonus is one of the fastest ways to close both gaps in one go. After that, consider whether extra super contributions (up to your annual concessional cap) or investing outside super make more sense, depending on how soon you might need the money.
Consider Salary Sacrifice for a Tax-Effective Boost
Directing part or all of a bonus into super via salary sacrifice reduces the tax on that amount to 15% (subject to your annual concessional contribution cap), instead of your marginal income tax rate — worth discussing with your payroll or HR team before the bonus is paid, since it usually needs to be arranged in advance, not after you've already received the payment.
Frequently Asked Questions
- How is a work bonus taxed in Australia?
- As ordinary income through PAYG withholding, at your marginal tax rate — the withholding on the bonus itself can look higher than expected, but this typically evens out as a refund when you lodge your tax return.
- Can I reduce tax on a bonus?
- Directing some or all of it into super via salary sacrifice taxes that amount at 15% instead of your marginal rate, subject to your annual concessional contribution cap — this needs to be arranged with your employer before the bonus is paid.
- What should I do with a bonus first?
- Check your emergency fund is fully funded and clear any high-interest debt first, then consider extra super contributions or investing outside super depending on your timeline.
- Is salary sacrifice always the best use of a bonus?
- Not necessarily — it locks the money away until your preservation age. If you might need the funds sooner, investing outside super or building your emergency fund may be the better priority despite the less favourable tax treatment.
Informational content, not financial, tax, or legal advice. Verify amounts, limits, and current conditions directly with official sources (ATO, ASIC, APRA) before making a decision.
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