Cross‑border equity tax rules remain unsettled
Coverage warns there’s still no clear global fix for taxing multinational tech profits and employee equity, as talks between major economies stall — leaving cross‑border RSU holders exposed to shifting rules and potential double taxation reported. Multinational work arrangements will keep creating tax complexity for Canadian engineers at U.S. firms.
OECD released the 2025 Update to the Model Tax Convention on Nov. 19, 2025), explicitly adding treaty guidance aimed at cross‑border remote work rather than a new global levy on digital profits.(pwc.com) Pillar One's reallocation mechanism (Amount A) remains unresolved after the U.S. circulated a July presentation and an Aug. 13 “side‑by‑side” proposal in 2025 that drew critiques from other Inclusive Framework members.(news.bloombergtax.com) The OECD/G20 Inclusive Framework still involves roughly 138–139 jurisdictions working on BEPS 2.0, with member states meeting at the 17th plenary in Cape Town on Apr. 7–10, 2025 to discuss Pillars One and Two.(oecd.org) Cross‑border RSU taxation commonly requires allocating vested compensation by the number of workdays performed in each country during the vesting window, and payroll teams often withhold based on current payroll location rather than that treaty‑based allocation.(mcacrossborder.com) The 2025 OECD commentary expanded Article 5 with 21 new paragraphs and five illustrative examples to try to clarify when home working can create a permanent establishment — a technical change that affects which country can claim employment income at source.(assets.kpmg.com) Practical relief remains bilateral: U.S. taxpayers facing Canadian withholding on RSUs typically seek a U.S. foreign tax credit to offset Canadian tax paid, but those credits are constrained by U.S. credit rules and timing mismatches.(ttlc.intuit.com) Until multilateral Pillar One outcomes or treaty updates land, multinational payroll practice is the immediate determinant of cashflow for affected employees — employers' withholding and reporting choices continue to drive real‑time exposure for Canadian engineers on U.S. payrolls.(mcacrossborder.com)
