Common-Law Separation

How Does Common-Law Separation Work in the United States?

Common-law separation in the United States applies only when partners established a valid common-law marriage in one of the 8 states that recognize it: Colorado, Iowa, Kansas, Montana, Oklahoma, Rhode Island, Texas, and Utah, plus the District of Columbia. New Hampshire recognizes common-law marriage solely for inheritance purposes under RSA 457:39. Partners in these jurisdictions must file for divorce to legally end their common-law marriage—there is no separate "common-law separation" procedure.

State-by-State Recognition and Requirements

Texas (Texas Family Code § 2.401): Texas requires proof of three elements: (1) agreement to be married, (2) cohabitation in Texas as spouses, and (3) holding out to others as married. Couples may alternatively file a Declaration of Informal Marriage with the county clerk. The statute imposes a 2-year limitation period—if separation proceedings aren't commenced within 2 years of the date partners separated, a rebuttable presumption arises that no marriage agreement existed. Texas prohibits common-law marriage for persons under 18 years of age.

Colorado (C.R.S. § 14-2-109.5): Colorado requires mutual consent to be married and open assumption of a marital relationship. Since September 1, 2006, both parties must be 18 or older. Unlike Texas, Colorado has no time-based cohabitation requirement—the Lucero decision established that a common-law marriage could exist after one month or not exist after 10 years, depending on the parties' conduct and intent.

Kansas (K.S.A. § 23-2502): Kansas requires capacity to marry, present agreement to be married, and public representation as married. Both parties must be 18 years of age. Courts examine factors including joint tax filings, designation as spouse on insurance or benefits documents, and use of the same last name.

Iowa (Iowa Code § 595.11): Iowa courts apply a three-part test: intent and agreement to marry, continuous cohabitation, and public declarations of the marriage. No minimum cohabitation period exists, but evidence of public acknowledgment is crucial.

States That Abolished Common-Law Marriage

Several states previously recognized common-law marriage but no longer allow new common-law marriages: Alabama (abolished 2017), Florida (abolished 1968), Georgia (abolished 1997), Indiana (abolished 1958), Ohio (abolished 1991), Pennsylvania (abolished 2005), and South Carolina (abolished 2019). Marriages validly created before abolition remain recognized.

Property Rights for Unmarried Partners Without Common-Law Marriage

In the 42 states that don't recognize common-law marriage, unmarried partners have no automatic property rights upon separation. Property division follows title ownership—assets belong to whoever holds legal title. Partners may pursue three alternative remedies:

Marvin Claims (Palimony): Following Marvin v. Marvin, 557 P.2d 106 (Cal. 1976), California and approximately 30 other states recognize express or implied contracts between cohabitants regarding property and support, provided such agreements aren't based solely on sexual services. California courts may enforce oral agreements, though proving terms presents significant evidentiary challenges. Minnesota's "anti-palimony statutes" (Minn. Stat. § 513.075-076, enacted 1980) require written contracts for enforcement.

Constructive Trust: Courts may impose constructive trust remedies when one partner unjustly benefits from the other's contributions. The claimant must demonstrate a direct connection between their contributions and specific property acquisition or improvement.

Partnership Theory: Some courts apply partnership principles when couples operated joint businesses or systematically combined finances, though this theory is narrowly applied.

Domestic Partnership and Civil Union Alternatives

Several states offer domestic partnership or civil union registration that provides varying degrees of legal protection:

• California: Domestic partnerships available to same-sex couples of any age and opposite-sex couples where at least one partner is 62+ (Cal. Fam. Code § 297)
• Colorado: Designated beneficiary agreements under C.R.S. § 15-22
• Hawaii: Reciprocal beneficiary relationships under HRS Chapter 572C
• Illinois: Civil unions under 750 ILCS 75

Federal Recognition Limitations

The federal government recognizes common-law marriages valid under state law for Social Security benefits (42 U.S.C. § 416), federal income tax filing (26 U.S.C. § 7703), and immigration purposes (INA § 101(a)(35)). The Full Faith and Credit Clause requires all states to recognize common-law marriages validly created in recognizing states.

Practical Steps for Ending a Common-Law Marriage

Partners in a valid common-law marriage must:

1. File for divorce in family court (no simplified "separation" procedure exists)
2. Address property division under state equitable distribution or community property laws
3. Resolve spousal support (alimony) if applicable
4. Determine parenting arrangements and child support if children are involved

The divorce process and requirements mirror those for ceremonially married couples—the fact that no marriage license exists doesn't simplify dissolution.

How Does Common-Law Separation Work in Canada?

Canada has 1.9 million common-law couples representing 22.7% of all partnerships—the highest rate among G7 countries. In Quebec, 42.7% of couples live common-law compared to 16.9% in the rest of Canada. Common-law separation in Canada differs fundamentally from the US because family law falls under provincial jurisdiction, creating a patchwork of rights that varies dramatically by province.

Federal Definition vs. Provincial Requirements

The Canada Revenue Agency recognizes common-law partners after 12 continuous months of cohabitation for tax purposes under the Income Tax Act. However, this federal definition doesn't determine property or support rights—provincial legislation controls those matters.

Provinces with Automatic Property Division Rights

British Columbia (Family Law Act, S.B.C. 2011, c. 25, § 3): After 2 years of cohabitation in a "marriage-like relationship," common-law partners receive identical property division rights to married spouses. Family property acquired during the relationship is divided equally regardless of whose name appears on title. The 2-year limitation period under section 198(2) requires claims to be filed within 2 years of separation. Importantly, having a child together does not automatically trigger property division rights—the 2-year cohabitation threshold still applies.

Saskatchewan (The Family Property Act, S.S. 1997, c. F-6.3): Similar to BC, common-law partners in a relationship of 2+ years have equal property division rights. The legislation applies the same framework as married couples.

Manitoba (The Family Property Act, C.C.S.M. c. F25, § 1(1)): Common-law partners have equal rights to family property division after meeting cohabitation requirements. The basic rule provides both partners an equal share of family property value upon separation.

Alberta (Family Property Act, R.S.A. 2000, c. F-4.7 as amended 2020): Since January 1, 2020, Adult Interdependent Partners under the Adult Interdependent Relationships Act (AIRA) qualify for property division. Requirements: 3 years continuous cohabitation in a "relationship of interdependence," OR any cohabitation duration with a shared child, OR signing an Adult Interdependent Partner Agreement. Claims must be filed within 2 years of knowing the relationship ended.

Provinces Requiring Unjust Enrichment Claims

Ontario (Family Law Act, R.S.O. 1990, c. F.3): The equalization scheme applies only to legally married spouses. Common-law partners must pursue claims through the equitable doctrine of unjust enrichment as established in Kerr v. Baranow, 2011 SCC 10. The Supreme Court's "joint family venture" framework requires proving: (1) enrichment of one partner, (2) corresponding deprivation of the other, (3) absence of legal justification, and (4) connection to family asset accumulation. Successful claims typically result in monetary awards; constructive trust remedies over specific property require showing that money damages are insufficient.

Quebec (Civil Code of Québec, Arts. 401-430): Quebec traditionally provided no property rights to de facto (common-law) spouses. Bill 56, effective June 30, 2025, creates the "parental union regime" for unmarried couples who become parents after that date. The regime provides:

• Automatic application to couples having children after June 30, 2025
• Division of "parental union patrimony" (family-related assets) on separation
• Protection of the family residence requiring both partners' consent for sale
• Inheritance rights of 1/3 of the deceased partner's estate
• Exclusions: No spousal support rights, no inclusion of RRSPs/pension funds in divisible patrimony

Pre-existing couples may opt in voluntarily but aren't automatically covered.

Atlantic Provinces (NS, NB, PEI, NL): Common-law partners must rely on unjust enrichment or constructive trust claims similar to Ontario.

Spousal Support for Common-Law Partners

Unlike property division, most provinces provide spousal support entitlement after 2-3 years of cohabitation:

• BC Family Law Act § 3(1)(b): Support available after 2 years cohabitation
• Ontario Family Law Act § 29: Support available after 3 years continuous cohabitation OR in a relationship of "some permanence" with a shared child
• Alberta Adult Interdependent Relationships Act: Support available after 3 years OR with shared child

Spousal Support Advisory Guidelines (SSAG)

The SSAG, though developed for the Divorce Act context, are widely applied to common-law separations provincially. Key formulas:

Without Child Support Formula: Duration ranges from 0.5 to 1 year per year of relationship. A 10-year relationship would generate 5-10 years of support.

Rule of 65: If the recipient's age plus relationship length equals 65 or more, indefinite support may be appropriate. Example: 50-year-old partner after 15-year relationship (50+15=65) qualifies for potential indefinite support.

Parenting Arrangements (Decision-Making Responsibility and Parenting Time)

Under the 2021 Divorce Act amendments, unmarried parents have identical rights regarding their children. Courts apply the "best interests of the child" test under provincial family law statutes. Key considerations include:

• Maximum contact principle (preserving relationships with both parents)
• Child's physical, emotional, and psychological safety
• Each parent's willingness to support the child's relationship with the other parent

Child support follows the Federal Child Support Guidelines (SOR/97-175) regardless of parents' marital status.

Cohabitation Agreements: Essential Protection

Given the inconsistent provincial frameworks, cohabitation agreements provide critical protection. A valid agreement can:

• Define property ownership and division terms
• Establish or waive spousal support obligations
• Address debt responsibility
• Specify procedures if the relationship ends

Agreements must be in writing, signed by both parties, and ideally include independent legal advice certificates for enforceability.