Non-GAAP numbers can genuinely improve comparability by removing acquisition amortisation or a genuine one-off legal settlement. They can also remove real, recurring costs such as stock-based pay and annual restructuring.
Regulators require equal prominence for the GAAP figure and a line-by-line reconciliation, which is where the analysis happens. Track the gap between GAAP and adjusted earnings over five years: a widening gap is the signal.
Example: Northwind Tools reports $78M of GAAP net income and $118M adjusted, excluding $32M of stock-based pay, $11M of restructuring and $8M of acquisition amortisation, net of tax.
Related: adjusted-ebitda, pro-forma, earnings-quality, sbc-as-percent-of-revenue, one-time-charge