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№ 77 Family Law

How Long Must You Live Together to Be Common-Law in Alberta?

Find out how long couples must live together in Alberta to be adult interdependent partners, when a child or agreement shortens it, and how it is judged.

Family Law5 min readTSLBy the Treadstone Law Team · AlbertaUpdated November 6, 2026
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Key takeaways
  • The general rule is 3 years of continuous living together in a relationship of interdependence.
  • You can qualify sooner if you have a child of the relationship, or by signing an agreement, though limits apply to who can sign one.
  • Living together is judged by how you share your lives, not just by a shared address.

Many couples ask whether there is a magic number of months that turns a relationship into a "common-law" one in Alberta. There is a general time rule, but there are also shortcuts, and the nature of the relationship matters as much as the calendar.

This article walks through the 3-year rule, the exceptions, how a relationship of interdependence is judged, and why the label matters. A lawyer can confirm how these rules apply to your situation.

This article covers the law of Alberta.

The 3-year rule

Under the Adult Interdependent Relationships Act (AIRA), two people become adult interdependent partners if they live together in a relationship of interdependence for a continuous period of not less than 3 years. Alberta.ca describes the same rule for will and estate purposes.

The period must be continuous. A single period of not more than 90 days with reconciliation as its primary purpose is treated as not interrupting a separation, which matters when a couple splits and tries again.

Shorter routes: a child or an agreement

Two people who are living together, or intend to live together, in a relationship of interdependence may enter into an agreement. A person cannot sign if already party to an existing adult interdependent partner agreement, if married, or if a minor, unless the minor is at least 16 and the minor's guardians gave prior written consent. A married person also cannot become a partner while living with his or her spouse.

An agreement is invalid if a party was induced by fraud, duress or undue influence, or if the parties were neither living together nor intending to live together when they signed.

How a relationship of interdependence is judged

Sharing an address is not enough by itself. The Act defines a relationship of interdependence as one outside marriage in which two people share one another's lives, are emotionally committed to one another, and function as an economic and domestic unit.

Alberta.ca lists factors for whether two people function as an economic and domestic unit:

How these factors apply depends on the facts of your relationship, so it is worth confirming with a lawyer.

Situations where the rules differ

Roommates, for example, may share a home without the emotional commitment and shared economic life the definition requires. Whether a particular arrangement qualifies is a question of fact worth confirming with a lawyer.

Why partner status matters

Once you are adult interdependent partners, other Alberta laws treat you much like spouses in some areas. The Family Property Act applies to adult interdependent partners as well as spouses, and it can be used by partners who separate on or after January 1, 2020. A couple that has not met the 3-year, child or agreement test cannot use that Act and must rely on other claims, such as unjust enrichment or trust claims.

Status also matters if one partner dies without a will. If the deceased leaves a partner but no descendants, the entire intestate estate goes to the partner. If the deceased leaves a partner and descendants who are all also the partner's descendants, the partner again receives the entire intestate estate. If some descendants are not also the partner's, the partner gets the greater of the prescribed amount or 50% of the net value of the intestate estate, and the residue goes to the deceased's descendants. The prescribed amount is set by the Preferential Share (Intestate Estates) Regulation and was $150 000 in the version current as of October 20, 2021, so it is worth confirming the current figure.

Status can also end. Alberta.ca says partners who stop living together are separated, and that partners may also end the relationship by agreement. The Act's own rule looks at living separate and apart for more than one year with one or both partners intending the relationship not to continue.

What to do next

Frequently asked questions

Is it a year, as some people say?

The Alberta rule in the AIRA is a continuous period of not less than 3 years, not one year. A shorter period can qualify if there is a child of the relationship or you sign an agreement.

Do we qualify sooner if we have a baby?

You can qualify in under 3 years if you live in a relationship of interdependence of some permanence and there is a child of the relationship by birth or adoption. Whether the relationship has that permanence depends on the facts.

Does a short break reset the clock?

The Act treats a single period of not more than 90 days with reconciliation as its primary purpose as not interrupting a separation. Longer or repeated breaks raise fact-based questions a lawyer can assess.

Can we sign something instead of waiting?

Possibly, if you are both eligible to sign. Signing an adult interdependent partner agreement lets two people become partners with no minimum time. A person cannot sign if already party to an existing agreement, if married, or if a minor (unless the minor is at least 16 and the guardians gave prior written consent). You must also be living together or intend to live together when you sign.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Alberta laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a lawyer who practises in Alberta. Reach us at 1-844-900-1070 or send our Team a message.

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