ASC 260 (US GAAP) and IAS 33 (IFRS) are mostly converged: both require basic and diluted EPS, the treasury-stock method for options, and the if-converted method for convertibles.
| Area | US GAAP (ASC 260) | IFRS (IAS 33) |
|---|---|---|
| Contracts settleable in shares or cash | Rebuttable presumption of share settlement | Presumption of share settlement (applied slightly differently) |
| Year-to-date diluted computation | Specific averaging rules | Differs in detail |
| Contingently issuable shares | Included when conditions met | Broadly aligned |
An educational reference and original synthesis — not investment advice, and not a substitute for the standard. Consult ASC 260 / IAS 33 directly.