New Mexico does not permit couples to form common law marriages within the state under NMSA § 40-1-1, which requires a marriage license and formal ceremony for all legally recognized unions. However, New Mexico courts will recognize common law marriages validly established in other states under the Full Faith and Credit Clause of the U.S. Constitution. If your common law marriage from Colorado, Texas, Kansas, Iowa, Montana, South Carolina, Oklahoma, or the District of Columbia is recognized as valid by a New Mexico court, you must file for divorce to legally end the relationship—separation alone does not dissolve the marriage. The divorce filing fee is $137 across all 13 judicial districts, and at least one spouse must have resided in New Mexico for six months immediately before filing to establish jurisdiction under NMSA § 40-4-5(A).
Key Facts: Common Law Divorce in New Mexico
| Element | Details |
|---|---|
| Common Law Marriage Created in NM | Not permitted under NMSA § 40-1-1 |
| Out-of-State Common Law Marriage | Recognized under Full Faith and Credit |
| Filing Fee | $137 (uniform across all 13 districts, as of March 2026) |
| Residency Requirement | 6 months domicile under NMSA § 40-4-5(A) |
| Waiting Period to File | None |
| Response Period After Service | 30 days under NMRA 4A-100 |
| Grounds for Divorce | Incompatibility (no-fault) under NMSA § 40-4-1 |
| Property Division | Community property (50/50) under NMSA § 40-3-8 |
| Uncontested Timeline | 30-60 days |
| Contested Timeline | 6-18+ months |
Does New Mexico Recognize Common Law Marriage?
New Mexico does not permit common law marriages to be formed within its borders, but the state will recognize a common law marriage validly created in another jurisdiction under the Full Faith and Credit Clause. This distinction is critical: if you lived together in New Mexico and held yourselves out as married without a license, you are not legally married. However, if you established a valid common law marriage in Colorado, Texas, Kansas, Iowa, Montana, Oklahoma, South Carolina (before July 2019), or the District of Columbia before relocating to New Mexico, the state's courts will treat your union as a legal marriage.
The landmark case Gallegos v. Wilkerson (1968) established that although a valid common law marriage may not be consummated in New Mexico, if valid where consummated, it will be recognized in New Mexico. The New Mexico Court of Appeals reaffirmed this principle in In re Estate of Bivians (1982), holding that New Mexico applies the rule of comity—meaning the law of the jurisdiction where the marriage was contracted governs its validity.
States That Currently Allow Common Law Marriage (2026)
| State | Key Requirements |
|---|---|
| Colorado | Mutual consent, cohabitation, public reputation as married |
| Texas | Agreement to marry, cohabitation, holding out as married |
| Kansas | Capacity, present agreement, public reputation (both parties 18+) |
| Iowa | Intent to marry, continuous cohabitation, public declaration |
| Montana | Capacity, mutual consent, cohabitation, public reputation |
| Oklahoma | Consent, legal capacity, cohabitation |
| District of Columbia | Intent to marry, cohabitation, holding out |
| South Carolina | Pre-July 2019 only; abolished effective July 24, 2019 |
Proving a Valid Out-of-State Common Law Marriage
To divorce a common law spouse in New Mexico, you must first prove that a valid common law marriage existed under the laws of the state where it was formed—this burden falls entirely on the party asserting the marriage. New Mexico courts require clear and convincing evidence that all elements of a valid common law marriage were satisfied in the originating jurisdiction, including mutual agreement to marry, cohabitation, and holding yourselves out publicly as husband and wife.
In re Estate of Lamb (1982) established that the threshold question is whether a couple established significant contacts with a jurisdiction recognizing common law marriage. The court examines factors including the length of residence in the common law state, joint tax filings as a married couple, joint bank accounts, shared property titles, use of the same last name, introduction of each other as spouse, and testimony from friends and family who understood the couple to be married.
Evidence Categories for Common Law Marriage Claims
| Category | Strong Evidence | Weak Evidence |
|---|---|---|
| Agreement to Marry | Written declaration, affidavits | Verbal assertions alone |
| Cohabitation | Joint lease in common law state, utility bills | Occasional overnight stays |
| Holding Out | Joint tax returns filed as married, insurance beneficiary forms | Social media posts only |
| Reputation | Testimony from multiple witnesses in the common law state | Witnesses from New Mexico only |
Filing for Divorce After Common Law Marriage Recognition
Once a New Mexico court recognizes your out-of-state common law marriage as valid, the divorce process proceeds identically to any other dissolution of marriage under NMSA § 40-4-1. You will file a Petition for Dissolution of Marriage in the district court of the county where either spouse resides, pay the $137 filing fee, and serve your spouse with the petition. The 30-day response period under NMRA 4A-100 begins upon service, after which the court may schedule hearings or approve an uncontested settlement.
New Mexico is a pure no-fault divorce state, meaning over 95% of divorces proceed on the ground of incompatibility under NMSA § 40-4-2. Incompatibility is defined as discord or conflict of personalities that destroys the legitimate ends of the marriage with no reasonable expectation of reconciliation. The court must grant the divorce upon a finding of incompatibility—there is no discretion to deny dissolution when statutory requirements are met, as established in Garner v. Garner (1973-NMSC-067).
Divorce Timeline Comparison
| Divorce Type | Typical Duration | Cost Range |
|---|---|---|
| Uncontested with full agreement | 30-60 days | $137-$500 |
| Uncontested requiring negotiation | 60-120 days | $500-$2,500 |
| Contested without trial | 6-12 months | $5,000-$15,000 |
| Contested with trial | 12-24+ months | $15,000-$50,000+ |
Property Division in Common Law Divorce
New Mexico is one of nine community property states, meaning all property acquired during the marriage—including a recognized common law marriage—is presumed to belong equally to both spouses under NMSA § 40-3-8. Community property must be divided equitably upon divorce, which in New Mexico generally means a 50/50 split. Separate property, which includes assets owned before marriage, gifts, and inheritances, remains with the original owner.
The classification of property follows NMSA § 40-3-8, which defines separate property as property acquired before marriage, property received by gift or inheritance, and property designated separate by written agreement. Property acquired by either spouse during the marriage—including income, real estate, retirement contributions, and debts—is community property regardless of whose name appears on the title.
Property Classification Under NMSA § 40-3-8
| Property Type | Classification | Division Upon Divorce |
|---|---|---|
| Income earned during marriage | Community | 50/50 |
| Home purchased during marriage | Community | 50/50 |
| Retirement contributions during marriage | Community | 50/50 |
| Inheritance received during marriage | Separate | Stays with recipient |
| Property owned before marriage | Separate | Stays with original owner |
| Gifts from third parties | Separate | Stays with recipient |
| Debts incurred during marriage | Community | 50/50 |
Importantly, fault cannot be considered when dividing property. Under NMSA § 40-4-1, misconduct such as adultery does not affect property division because New Mexico abolished fault-based considerations for asset allocation.
When No Valid Marriage Exists: Property Rights for Unmarried Couples
If you lived together in New Mexico without establishing a common law marriage in another state, you have no marital rights under state law and cannot file for divorce. Property acquired during cohabitation is generally considered the separate property of the person who purchased it, with each partner retaining ownership of assets titled in their individual name. Community property rules under NMSA § 40-3-8 do not apply to unmarried couples, regardless of the length of cohabitation.
Unmarried couples who separate must pursue civil remedies rather than family court proceedings. Available legal options include partition actions to divide jointly titled real estate, unjust enrichment claims if one partner significantly contributed to assets titled in the other's name, constructive trust claims where one partner was promised an ownership interest, and contract claims if a written cohabitation agreement exists. These civil remedies are typically more expensive and difficult to prove than standard divorce proceedings.
Legal Options for Unmarried Couples Separating
| Legal Remedy | Purpose | Court |
|---|---|---|
| Partition Action | Divide jointly owned real estate | District Court (Civil) |
| Unjust Enrichment | Recover value of contributions to partner's assets | District Court (Civil) |
| Constructive Trust | Establish ownership interest in titled property | District Court (Civil) |
| Contract Enforcement | Enforce written cohabitation agreement | District Court (Civil) |
| Palimony | Enforce oral support agreement (limited recognition) | District Court (Civil) |
Residency Requirements for Filing
At least one spouse must have resided in New Mexico for a minimum of six months immediately preceding the filing of the divorce petition and must have established domicile in the state under NMSA § 40-4-5(A). Domicile requires both physical presence and the intent to remain in New Mexico permanently or indefinitely, as the New Mexico Supreme Court clarified in Hagan v. Hardwick (1981-NMSC-002).
Continuous physical presence for the entire six months is not required. Temporary absences for work, travel, or family obligations do not defeat the residency requirement provided the spouse maintains a New Mexico domicile throughout the period. Evidence of domicile includes a New Mexico driver's license, voter registration, property ownership, employment, and other indicators of intent to remain.
Military personnel have special provisions under NMSA § 40-4-5(B). Service members stationed continuously at any New Mexico military installation for six months are deemed to have domicile in the state and county where the installation is located, regardless of their official state of legal residence.
Court Costs and Filing Fees
The divorce filing fee in New Mexico is $137, which applies uniformly across all 13 judicial districts as of March 2026. This is one of the more affordable filing fees in the American Southwest. Additional costs include service of process ($25-$50 for sheriff service or private process server), motion filing fees ($25-$50 per motion), and certified copies ($1.50 per page).
For contested cases involving children, a guardian ad litem investigation adds $1,500-$5,000 to total costs. Mediation fees average $150-$300 per hour, with most mediations requiring 4-8 hours. Attorney fees in New Mexico average $270 per hour, with initial retainers typically ranging from $2,500 to $5,000.
Cost Breakdown by Divorce Type
| Expense | Uncontested | Contested |
|---|---|---|
| Filing Fee | $137 | $137 |
| Service of Process | $25-$50 | $25-$50 |
| Attorney Retainer | $0-$2,500 | $2,500-$5,000 |
| Total Attorney Fees | $500-$2,000 | $10,000-$25,000+ |
| Mediation | $0-$600 | $600-$2,400 |
| Guardian ad Litem | N/A | $1,500-$5,000 |
| Expert Witnesses | N/A | $2,000-$10,000 |
| Total Range | $137-$3,000 | $10,000-$50,000+ |
Fee Waiver Availability
New Mexico offers fee waivers through the Application for Free Process (Form 4-206) for individuals who cannot afford court costs. Eligibility is generally based on household income at or below 200% of the federal poverty guidelines. The waiver covers the $137 filing fee and may also cover service of process costs.
Child Custody and Support in Common Law Divorce
Child custody and support determinations in a common law divorce follow the same standards as any other dissolution proceeding in New Mexico. Custody decisions are governed by the best interests of the child under NMSA § 40-4-9, considering factors including the child's wishes (if of sufficient age and maturity), each parent's willingness to accept custody responsibilities, the child's adjustment to home and community, and the mental and physical health of all parties.
New Mexico calculates child support using income shares guidelines under NMSA § 40-4-11.1. The formula considers both parents' gross income, the number of children, health insurance costs, childcare expenses, and the parenting time schedule. Support obligations continue until the child reaches age 18 or graduates high school, whichever occurs later, up to age 19.
Spousal Support Considerations
Spousal support (alimony) in New Mexico common law divorces follows the same factors as traditional divorces under NMSA § 40-4-7. Courts consider the duration of the marriage, each spouse's earning capacity and employability, the standard of living established during the marriage, each spouse's age and health, and the property division outcome. The length of your common law marriage—counting from when you established the marital relationship in the recognizing state—affects support duration.
New Mexico courts may award rehabilitative support (temporary support while a spouse gains education or job skills), transitional support (fixed-term support to assist adjustment), or indefinite support (rare, typically reserved for long marriages where one spouse cannot become self-supporting). Fault, including adultery or abandonment, cannot be considered when determining spousal support amounts.
Frequently Asked Questions
Can I get a common law divorce in New Mexico if we only lived together in this state?
No, New Mexico does not recognize common law marriages created within the state, so there is no marriage to dissolve. If you cohabitated only in New Mexico without a marriage license and ceremony, you are legally unmarried regardless of how long you lived together or whether you used the same last name. You cannot file for divorce, and you have no automatic rights to your partner's property under community property laws.
How do I prove my common law marriage from another state is valid?
You must provide clear and convincing evidence satisfying the elements required by the state where you formed the marriage. Evidence includes joint tax returns filed as married filing jointly, affidavits from witnesses who knew you as a married couple in that state, joint property deeds, shared financial accounts, insurance beneficiary designations, and documentation showing you used the same last name. The burden of proof falls on the party asserting the marriage exists.
What if my spouse denies we had a common law marriage?
The court will hold an evidentiary hearing to determine whether a valid common law marriage existed under the laws of the originating state. You will need to present documentary evidence and witness testimony establishing mutual agreement to marry, cohabitation in the common law state, and holding yourselves out as married. If the court finds no valid marriage existed, your case will be dismissed and you must pursue civil remedies for any property disputes.
How long does a common law divorce take in New Mexico?
Once the court recognizes your common law marriage as valid, the timeline matches standard divorces. Uncontested cases where both parties agree on all issues finalize in 30-60 days. Contested divorces involving disputes over property, custody, or support take 6-18 months, with complex cases exceeding 24 months. The additional step of proving the common law marriage's validity can add 1-3 months to contested proceedings.
Is my common law marriage from Texas recognized in New Mexico?
Yes, if you meet Texas's requirements for informal marriage under Texas Family Code § 2.401. Texas requires: (1) agreement to be married, (2) living together in Texas as spouses, and (3) representing to others that you are married. Alternatively, you may have filed a Declaration of Informal Marriage with a Texas county clerk. With proper documentation, New Mexico courts will recognize your Texas common law marriage and process your divorce accordingly.
What happens to property we bought while living together in New Mexico?
If your common law marriage is recognized, property acquired during the marriage is community property subject to 50/50 division under NMSA § 40-3-8. If no valid marriage exists, you have no community property rights—each person owns what is titled in their name. Jointly titled property would require a partition action in civil court to divide, not family court divorce proceedings.
Can I receive alimony from a common law divorce?
Yes, once your common law marriage is recognized as valid, you have the same rights to spousal support as any divorcing spouse under NMSA § 40-4-7. Courts consider factors including marriage duration, each spouse's earning capacity, the marital standard of living, and contributions to the marriage. Long-term common law marriages (10+ years) have stronger claims for transitional or indefinite support.
Do I need a lawyer for a common law divorce in New Mexico?
While not legally required, attorney representation is strongly recommended for common law divorces because you must first prove the marriage's validity under another state's law. This requires knowledge of that state's common law marriage elements and evidentiary standards. Attorney fees average $270 per hour in New Mexico, with retainers of $2,500-$5,000 typical for contested matters.
What if we lived in multiple states that recognize common law marriage?
You only need to prove a valid common law marriage was established in one state. Courts will look for the jurisdiction where you first met all elements of a common law marriage—typically where you initially agreed to marry, began cohabiting, and started holding yourselves out as married. Evidence from your time in that state carries the most weight.
How does child custody work if our common law marriage is not recognized?
Even if no valid marriage exists, both biological or legal parents have custody and support rights under NMSA § 40-4-9. Parentage proceedings under the Uniform Parentage Act establish these rights. Child support follows the same guidelines as divorcing parents, calculated based on both parents' incomes under NMSA § 40-4-11.1. Marriage status does not affect parental rights to children.
Author: Antonio G. Jimenez, Esq. | Florida Bar No. 21022 | Covering New Mexico divorce law
Disclaimer: Filing fees and court costs verified as of March 2026. Verify current fees with your local district court clerk before filing. This guide provides general legal information and does not constitute legal advice for your specific situation.