- Ontario's Family Law Act gives married spouses an automatic right to share in pension value accumulated during the marriage, as part of equalizing net family property.
- Before going further, it helps to separate two things people often lump together: 1.
- For married spouses, a pension earned during the marriage is treated as property, valued as of the separation date, and folded into each spouse's net family property calculation.
Pensions are often the single largest asset a couple has, sometimes larger than the family home. So when a common-law relationship ends, it's a fair question: does either partner get a share of the other's pension the way married spouses do? In Ontario, the short answer is no — and the reason why comes down to a legal right that simply doesn't extend to unmarried couples.
The Short Answer
Ontario's Family Law Act gives married spouses an automatic right to share in pension value accumulated during the marriage, as part of equalizing net family property. That right does not extend to common-law partners, regardless of how long they lived together or how the household finances were arranged.
Two Very Different Kinds of "Pension"
Before going further, it helps to separate two things people often lump together:
- Employer or workplace pensions — a defined-benefit or defined-contribution plan tied to a specific job, addressed for married spouses through the Family Law Act's equalization framework
- CPP credits — a federal government pension program with its own separate "credit splitting" process on relationship breakdown, which operates independently of Ontario's provincial equalization rules and under its own eligibility rules
The answer to "do common-law partners split pensions" differs depending on which of these you mean — this article focuses on workplace and retirement pensions; CPP credit splitting works differently and is worth researching separately.
Why Married Spouses Get an Automatic Share
For married spouses, a pension earned during the marriage is treated as property, valued as of the separation date, and folded into each spouse's net family property calculation. Because equalization applies automatically to married spouses by law, neither spouse needs a separate agreement in place for pension value to be shared — it happens as part of the standard equalization process.
Why Common-Law Partners Don't
Common-law partners in Ontario are not eligible for equalization of net family property under the Family Law Act, at any length of cohabitation. Since a pension's inclusion in equalization flows directly from that broader property-sharing right, and common-law partners don't have the underlying right, there's no equivalent mechanism that automatically shares pension value between unmarried partners on separation.
Three Common Situations
Situation 1 — No agreement, no joint contributions. The partner whose name is on the pension keeps it in full. The other partner has no automatic claim.
Situation 2 — A cohabitation agreement addresses pensions. Whatever the agreement says controls, provided it meets the Family Law Act's formal requirements: in writing, signed, and witnessed. This is the most reliable way for common-law partners to create pension-sharing rights that don't otherwise exist.
Situation 3 — One partner supported the other's career, enabling pension growth, but there's no agreement. This partner may have a potential claim through general trust or property law, but it requires proving specific legal elements on the facts — a genuinely harder and less certain path than the automatic right married spouses have.
What a Common-Law Partner Can Still Do
- Negotiate a cohabitation agreement early in the relationship that specifically addresses pension and retirement-asset treatment
- Keep records of financial and non-financial contributions to the household, in case a trust-based claim becomes relevant later
- Look into CPP credit splitting separately, since it operates under its own federal rules independent of provincial pension-division law
- Speak with a family lawyer before assuming either that nothing can be done, or that a claim is automatic
Frequently asked questions
If we've lived together for over ten years, does that change anything?
No. Ontario doesn't recognize a "common-law marriage" concept that creates property or pension-sharing rights after any specific length of cohabitation.
Does it matter if my name was added as a beneficiary on the pension?
Being named a beneficiary generally only affects what happens if the pension holder dies — it's a different question from whether you have a right to share the pension's value on separation while both partners are alive.
Can we agree now to split pensions if we ever separate?
Yes. A written, signed, and witnessed cohabitation agreement can set out pension-sharing terms in advance, which is generally far more reliable than trying to establish a claim after the fact.
Is CPP credit splitting available even without a formal agreement?
CPP credit splitting operates under its own separate federal process, distinct from Ontario's provincial pension-division rules — eligibility and how to apply are worth confirming directly with Service Canada or a lawyer familiar with the federal process.
What if my common-law partner and I already own our home together?
Joint ownership of a home is a separate question from pension division — jointly held property is generally dealt with according to the ownership shares and any agreement between the partners, while a pension in one partner's name alone still falls outside the automatic sharing that married spouses get.
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