Spousal support is federal in name only once you leave the divorce itself, so the province you live in shapes the practical analysis far more than most people expect.
Ontario governs unmarried partners through its Family Law Act, which extends support eligibility to common-law partners who cohabited continuously for at least three years or who have a child together and lived in a relationship of some permanence. The same Act drives spousal support for married spouses outside the divorce context, and Ontario courts lean heavily on the Spousal Support Advisory Guidelines when fixing amounts. The Family Responsibility Office enforces support orders and registered agreements, which is why filing your agreement with the right body matters as much as signing it.
British Columbia sets a lower threshold under its Family Law Act, treating partners as spouses for support purposes after two years of a marriage-like relationship, or immediately if they have a child together. BC was an early adopter of treating common-law and married spouses almost identically for support, so the married-versus-common-law gap narrows considerably here compared with other provinces.
Alberta applies its Family Property Act and, for support, recognizes adult interdependent partners, a defined status that captures many unmarried couples after three years of cohabitation or sooner with a child. The terminology differs from other provinces, so an agreement drafted for an Ontario couple should never be copied wholesale for an Alberta one without adjusting the status language.
Quebec stands apart entirely. The province does not recognize a support obligation between common-law partners (de facto spouses) the way the rest of Canada does, a position the Supreme Court upheld in the Eric v Lola litigation. Married spouses in Quebec are covered by the Divorce Act on divorce, but unmarried couples generally cannot claim spousal support, which makes a privately negotiated contract the only route to any obligation. If your matter touches property as well as support, our Canadian real estate and property agreement templates cover the home transfer side of a separation.