Changes to the Canada-US tax treaty will impact pensions and stock options of employees commuting across borders The recently announced fifth protocol to the 1980 Canada-US Income Tax Convention contains two proposals of specific interest to employees and their employers. The protocol addresses longstanding concerns regarding the deducibility of contributions to cross-border pension plans. In addition, Annex B to the protocol contains measures to bring relief from the possibility of double taxation of stock option benefits to internationally mobile employees.
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