CRA indicates that the payer of TOSI does not have to identify it as such on its tax-reporting slips

CRA indicated that the ITA did not impose any specific reporting requirements (e.g., making a notation on the applicable T5 or T3 tax slip) on the payer of income subject to the tax on split income (TOSI) – but noted that where a trust is allocating TOSI to a beneficiary, an additional statement indicating the beneficiary's share of the income and the type of income must be attached to the T3 slip. The beneficiary should also be advised in writing that the beneficiary can be required to file Form T1206., “Tax on Split Income”.

Neal Armstrong. Summary of 9 October 2025 APFF Financial Planning Roundtable, Q.5 under Reg. 201(1).