1. Check GFA
If GRV looks low, confirm the GFA. A wrong unit count or average size is the most common cause.
2. Check the construction rate
Construction rates vary widely by typology and city. The default may be wrong for your project. Compare to a recent QS estimate.
3. Check GST treatment
Margin scheme versus full GST changes net realisation materially. Make sure the right option is selected.
4. Check finance assumptions
A wrong drawdown profile or interest rate can shift IRR by several points. Open the finance panel and review.
5. Check the timing
A long design phase with no revenue inflates interest. Confirm the start and end of each stage.
If everything looks right and the numbers are still off, email dan@popurise.com with the scenario name.