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Related persons

Related persons, under subsection 251(2) of the Income Tax Act, include individuals connected by blood relationship, marriage, common-law partnership or adoption, a corporation and a person who controls it or is a member of a related group that controls it, and corporations under common or linked control. They are deemed not to deal at arm’s length.

Family sellers and buyers meet this definition because Income Tax Act rules refer to it, including the arm’s-length test in subsection 251(1) and the acquisition-of-control rules in subsection 256(7). The Act sets out who is related. It does not leave the question to the parties’ own description of their relationship.

Who the Act lists

  • Individuals connected by blood relationship, marriage, common-law partnership or adoption, as subsection 251(6) explains
  • A corporation and a person who controls it, or a member of a related group that controls it, and any person related to either of them
  • Two corporations controlled by the same person or group, or by persons who are themselves related, in the ways paragraph 251(2)(c) lists

What to check

Paragraph 251(1)(a) deems related persons not to deal at arm’s length, so the arm’s-length test follows. For the purposes of subsection 251(2), subsection 251(5) also treats some rights to acquire shares as ownership when deciding control. “Affiliated persons” under section 251.1 is a separate concept, so confirm which one a given rule uses. See selling to a child’s company.

Sources

This definition is checked against primary sources. Links were last confirmed on the dates shown.

  1. 01
    Government of CanadaGovernment
    Income Tax Act, R.S.C. 1985, c. 1 (5th Supp.)
    laws-lois.justice.gc.ca·Checked Oct 1, 2026
  2. 02
    Canada Revenue AgencyGovernment
    Income Tax Folio S1-F5-C1, Related Persons and Dealing at Arm’s Length
    canada.ca·Checked Oct 24, 2026

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