Are common-law partners covered under each other's employer health benefits in Ontario?

Whether a common-law partner is covered under an employer's group benefits plan depends entirely on the terms of the plan, not Ontario family law directly. Most group insurance plans in Ontario have expanded their definitions of "spouse" or "dependent" to include common-law partners, but the qualifying period varies — commonly one year, but sometimes as long as three years of cohabitation.

To add a common-law partner to your plan, you typically need to notify your employer's HR department and provide documentation (such as a statutory declaration of cohabitation or proof of shared address). Many plans have an enrolment window when a qualifying event occurs, so there can be deadlines to act.

If your employer's plan does not cover common-law partners, or if you are self-employed, alternative options include purchasing individual health coverage or looking at group plans offered through professional associations. Ontario's provincial health insurance (OHIP) is individual and not affected by relationship status. For plan-specific questions, ask your plan administrator for a copy of the benefit booklet and the definition of eligible dependent.