A worked example
Jess is 35, lives in Brisbane, and works as a project manager earning $95,000 per year. Her current super balance is $68,000. Her employer pays the super guarantee rate of 12% (as of 2025-26), which works out to $10,925 per year. Jess also salary sacrifices $200 per month ($2,400 per year) to boost her balance.
Her total annual contributions are $13,800. Assuming an average investment return of 7% per year and 2.5% salary growth, here's how it adds up over 30 years until she's 65:
- Starting balance: $68,000
- Annual contributions growing with salary: starting at $13,800
- Investment returns compound on the growing balance
- Fees of roughly 1% per year reduce net returns to about 6%
At age 65, Jess projects a balance of approximately $1.28 million. This accounts for contributions tax at 15% on concessional contributions, reducing the $13,800 to about $11,730 after tax. The calculator shows her how small changes to salary sacrifice or investment returns can shift her final balance by hundreds of thousands of dollars.
State-by-state differences
Superannuation is a Commonwealth system, so the super guarantee rate, contribution caps, and tax treatment are identical whether you live in Cairns or Hobart. The differences appear in how your super interacts with state-based costs and planning:
- NSW, VIC, QLD: Higher cost of living means you may need a larger super balance to maintain the same retirement lifestyle. The ASFA Retirement Standard suggests around $690,000 for a couple (ASFA 2024 figure) for a comfortable retirement, but Sydney and Melbourne retirees often need more.
- WA, NT: Higher average wages (especially in mining and resources) mean larger super balances on average, but many workers are on FIFO arrangements with irregular contribution patterns.
- SA, TAS: Lower average incomes mean super balances tend to lag the national average. More retirees may rely on the Age Pension to supplement smaller super balances.
- ACT: Highest average super balances nationally due to public service employment and above-average incomes. Many APS employees also have defined benefit schemes that don't appear in standard calculators.
Your state affects retirement costs, not the rules around super growth itself.
Common mistakes people make
- Forgetting contributions tax: Many people assume their employer's 12% super guarantee goes straight into their account. It doesn't. Concessional contributions are taxed at 15% before they hit your balance, so a $12,000 contribution becomes $10,200. High earners above $250,000 also cop Division 293 tax (an extra 15%), making the total 30%.
- Ignoring insurance premiums: Most super funds automatically deduct life and TPD insurance premiums from your balance. These can be $300 to $1,500 per year, quietly eroding your balance. Check your fund's annual statement and cancel cover if you don't need it or have it elsewhere.
- Underestimating fees: A 1% fee difference sounds tiny, but over 30 years it can cost you $100,000 or more. Compare your fund's total fees (administration, investment, performance) on the ATO's YourSuper comparison tool, not just the headline rate.
- Assuming constant returns: Plugging in 7% every year feels tidy, but super returns fluctuate wildly. The GFC saw some balanced funds drop 20%. Build in some pessimism, or run the calculator with 5-6% to see a more conservative outcome.
What this calculator doesn't account for
This calculator assumes steady employment and regular contributions. It doesn't account for career breaks (parental leave, illness, redundancy), which can pause contributions for months or years. It also doesn't factor in non-concessional contributions (after-tax money you add yourself), government co-contributions for low earners, or spouse contribution splitting.
The calculator uses a single average investment return. In reality, your return depends on your fund's asset allocation (growth vs conservative), and this often shifts as you age. Many funds use a lifecycle strategy that automatically moves you to lower-risk options closer to retirement, reducing returns in your final decade.
It doesn't model Division 293 tax for high earners, insurance premiums, family law splits, or the impact of taking out super early under financial hardship or compassionate grounds. Policy changes (like future super guarantee increases or cap adjustments) aren't predicted.
Edge cases and nuances
Defined benefit schemes: If you're a public servant (Commonwealth, state, or older local government), you might have a defined benefit fund. These don't grow based on investment returns but on your final salary and years of service. Standard calculators don't work for these schemes at all.
Division 293 tax: Earn over $250,000 (including concessional super contributions and reportable fringe benefits) and you pay an extra 15% tax on some or all of your concessional contributions. This reduces the after-tax value of salary sacrifice and employer contributions, but the calculator typically doesn't adjust for it automatically.
Transfer balance cap: As of 2025-26, you can only transfer $2.0 million into retirement phase (tax-free pension mode). If your projected balance exceeds this, the excess stays in accumulation phase and earnings remain taxed at 15%. This matters for very high balances.
Non-residents: If you work in Australia temporarily and leave permanently, you may be able to claim your super under the Departing Australia Superannuation Payment (DASP) scheme, but it's taxed at 65% for working holiday makers or 47% for others. Your growth projections are irrelevant if you're not staying.
