
Step Transaction Doctrine: How the IRS Collapses Multi-Step Tax Plans
The step transaction doctrine lets the IRS treat a sequence of formally separate steps as one taxable transaction. This guide explains the three tests courts apply — end result, mutual interdependence, and binding commitment — the landmark cases (Gregory v. Helvering, Court Holding, Kimbell-Diamond), the 2026 transactions most exposed (1031 drop-and-swaps, pre-sale entity conversions, gifts before the estate exemption sunset), and the documentation habits that keep multi-step plans defensible.










