The Excess Concessional Contributions are counted as personal assessable income taxed at the marginal tax rate. Learn more from the ATO
LodgeiT has a worksheet to help with concessional and non-concessional contributions tax.
Fill via "Estimate" page
Scroll through Division 293, make sure to toggle "Yes" the "Show Division 293 tax?"
Then, press the "Edit" > "Additional tax on concessional contributions (Division 293)"
If you have unused concessional contributions cap in the previous latest 5 years, then just click the "Edit" button and input it in the line item "Carried forward unused concessional contributions cap". Example below has only unused cap for 2 previous years (FY 2023 and FY 2022) $27,500 x 2 = $55,000. Here is the related ATO link for your reference: ATO link: https://www.ato.gov.au/individuals-and-families/super-for-individuals-and-families/super/growing-and-keeping-track-of-your-super/caps-limits-and-tax-on-super-contributions/concessional-contributions-cap
Notes:
- The tax offset had been calculated using the data from Division 293 worksheet and if you have adjustment, refer to this guide Adjustment for Super Contributions
The Division 293 is not added to Amount payable, but it is displayed in separate field at the end of Estimate section, after Amount payable.