Loading
ctjbns(Initiate)Initiate
28 Jan 2026

Hi,

I have a salary sacrifice arrangement in place to deposit $1,115 each month into my super account on top my employer's contributions. My goal is to reach the maximum amount of $50,000 plus interest to put the money towards a deposit.

I have been using ATO's web site to monitor the growth and see when I hit the $50k ceiling, using FHSS Determination tool. Each month, after my salary sacrifice contributions appear on ATO's website, I request a new determination. However, since November 2025, despite the fact that individual deposits into my superannuation account are visible on the web site, total amount is not increasing by much. Here are the numbers:

  • November 2025: $48,226.50 (Concessional contributions (before tax) $40,468.50)
  • December 2025: $48,793.00 (Concessional contributions (before tax) $40,919.00)
  • January 2026: $48,998.00 (Concessional contributions (before tax) $40,919.00)

My math is not very good. However, I was expecting the amount to grow by 85% of $1,115 plus 6% interest each month. ATO's web site says if I disagree with the calculations, I should fill out a form and either snail post or hand deliver it to their office, which is a waste of time on my part and resources on ATO's part.

Does anyone know how ATO does their calculations? Does anyone at ATO know?


Cheers,

84 views
1 replies
84 views
1 replies

All replies

KaraATO(Community Support)Community Support
29 Jan 2026

Hi @ctjbns

 

The FHSS scheme doesn't include interests, but associated earnings on both concessional and non-concessional contributions. Associated earnings are a notional amount of earnings calculated at the shortfall interest charge rate. When your associated earnings under the FHSS scheme are calculated we look at each eligible contribution separately.

 

The earnings are worked out based on how many days pass between the date each contribution was made and the FHSS determination date. This means each contribution can end up with a different earnings amount.

 

Because this is a complex area, I'd recommend giving our super team a call. They go through your account and provide a more thorough explanation. If the consultant is unsure, you can ask to have your question discussed with an FHSS specialist.

Loading
First Home Super Saver Scheme Calculation | ATO Community