Methodology
How the numbers are computed.
Ironlake shows its work. These pages document the assumptions, sources, and - just as important - the limitations behind each calculation, so you can judge the math for yourself.
- How the projection engine works
Ironlake's projection is deterministic - three explicit scenarios from inputs you can see and change, with a failure marker per trace and stated limitations.
- Tax-character and after-tax math
How Ironlake computes after-tax yield by tax character - every category, the federal/state/NIIT treatment of each, the sources, and the limitations.