Do stepchildren or unmarried partners inherit in New Mexico?

Under New Mexico intestacy law, stepchildren and unmarried partners do not inherit unless legally adopted or otherwise recognized by statute (NMSA § 45-2-102). Only legally recognized spouses and blood or adopted relatives are included in the intestate succession order. A will or trust is the only way to provide for stepchildren or unmarried partners.

What Happens If You Die Without a Will in New Mexico?

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This calculator provides general information about intestate succession and is not legal advice. Intestacy laws vary by state and situation. Consult a licensed attorney in your state for guidance specific to your family.Data verified 2026-07-15

Frequently Asked Questions

New Mexico intestacy laws determine who inherits when there is no will. As a community property state, New Mexico distinguishes between community property (acquired during marriage) and separate property (owned before marriage or received as a gift or inheritance). The surviving spouse's share differs for each type. The order of priority is: surviving spouse, children, parents, siblings, then more distant relatives.

The surviving spouse's share in New Mexico depends on family structure. With no children: Community property: decedent's 1/2 passes to spouse (spouse holds 100%). Separate property: 100% to spouse.. With shared children: Community property: decedent's 1/2 passes to spouse (spouse holds 100%). Separate property: 1/4 to spouse, 3/4 to children.. When children from a prior relationship survive: Community property: decedent's 1/2 passes to spouse (spouse holds 100%). Separate property: 1/4 to spouse, 3/4 to children..

New Mexico uses the "per capita at each generation" distribution method. Under this method, surviving descendants at each generational level share equally, with deceased members' shares pooled and redistributed at the next level. Per capita at each generation (by representation)

New Mexico requires an heir to survive the decedent by 120 hours to inherit. If an heir dies within this period, they are treated as having predeceased the decedent, and their share passes to the next eligible heirs.

Under New Mexico intestacy law, stepchildren and unmarried partners do not inherit unless legally adopted or otherwise recognized by statute. Only legally recognized spouses and blood or adopted relatives are included in the intestate succession order. A will or trust is the only way to provide for stepchildren or unmarried partners. The New Mexico will signing requirements page outlines what is needed to execute a valid will.

Probate costs in New Mexico depend on estate size and complexity. Estates valued at $50,000 or less may qualify for a simplified procedure that avoids formal probate. For larger estates, fees include court costs, attorney fees, and executor compensation. Use the New Mexico probate cost calculator for a detailed estimate.

New Mexico is a community property state, meaning most assets acquired during marriage are jointly owned. When one spouse dies without a will, the surviving spouse's share of community property and separate property are calculated under different rules. Community property with shared children: Community property: decedent's 1/2 passes to spouse (spouse holds 100%). Separate property: 1/4 to spouse, 3/4 to children.. Separate property follows a different distribution depending on surviving relatives.

Intestacy Laws in New Mexico

As a community property state, New Mexico treats most assets acquired during marriage as jointly owned. The Yes designation affects how property is divided when one spouse dies without a will. Separate property follows a different set of rules.

Assets passing to children and descendants in New Mexico are divided by Per capita at each generation. The state also imposes a 120 hours survival requirement, meaning an heir who dies within that window is treated as having predeceased the decedent.

Intestate estates in New Mexico valued under $50,000 may qualify for a simplified transfer procedure that avoids formal probate. Use the New Mexico probate calculator to estimate costs for larger estates.

A revocable living trust overrides New Mexico intestacy law and bypasses probate. Assets in the trust transfer privately to named beneficiaries without the delays, costs, or public exposure of the probate process.

SimplyTrust Editorial·Updated July 15, 2026

Legal Sources

Data sourced from New Mexico statutes and official state code. How we research.

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