Author: DamienATO(Community Support)Community Support 18 Dec 2025
Hi @Mantas,
Your estimated balance being lower than expected is likely due to a few common factors that affect superannuation calculations. The difference between your manual calculation and the estimated balance can change based on several reasons.
Your calculation assumes a consistent 4% return throughout the year, but superannuation returns fluctuate daily based on market performance. The fund's advertised year-to-date return might not reflect the exact timing of when your contributions were invested or the actual performance during specific periods.
Other factors that could affect your estimated balance include:
- fees and charges deducted from your account
- insurance premiums if you have cover through your super
- timing differences between when contributions are made and invested
- variations in investment performance throughout the year
- tax on contributions that may not be immediately reflected.
The estimated balance shown in ATO online services is based on information reported by your super fund, and there can be delays in reporting or differences in how returns are calculated versus applied to individual accounts.
Contact your super fund directly to get a detailed breakdown of your account activity and ask them to explain the specific factors affecting your balance calculation. They can provide the most accurate information about fees, investment timing, and performance that impacts your individual account.