New Mexico inheritance law starts with one fact that reshapes everything else: this is a community property state. A surviving spouse already owns half of the couple’s community property outright, so only the decedent’s half is available to pass by will or through intestate succession. New Mexico imposes no state estate tax and no state inheritance tax, which means for most families the state-level questions are about who inherits, not what gets taxed.
Community Property and Separate Property
Property acquired during a marriage generally belongs equally to both spouses, no matter whose name is on the title or who earned the paycheck. When one spouse dies, only their half of the community property is part of the estate. The surviving spouse’s half was never the decedent’s to give away.
Separate property is different. It covers what a spouse owned before the marriage, plus gifts and inheritances received individually during the marriage. All of the decedent’s separate property passes through the estate.
Under New Mexico law, when a spouse dies without a will, the decedent’s half of community property passes to the surviving spouse, and the surviving spouse keeps their own half.1Justia. New Mexico Code 45-2-807 – Death of Spouse; Community Property The effect is that the surviving spouse ends up with all of the community property, even though the legal path splits it into two halves.
Separate property is where the picture changes. If the decedent left both a spouse and descendants, the spouse takes only one-quarter of the separate property, and the descendants take the remaining three-quarters.2Justia. New Mexico Code 45-2-102 – Share of the Spouse If there are no descendants, the spouse inherits all of it. Most confusion about what a surviving spouse “really gets” comes from mixing these two categories together.
Who Inherits When There Is No Will
New Mexico’s Uniform Probate Code sets a strict order for intestate succession, starting with the closest family and working outward.
The Surviving Spouse’s Share
For community property, the decedent’s half passes entirely to the surviving spouse. For separate property, the spouse takes all of it if no descendants survive and one-quarter if descendants survive.2Justia. New Mexico Code 45-2-102 – Share of the Spouse
Everyone Else
Anything not passing to a surviving spouse goes to heirs in this order:3FindLaw. New Mexico Code 45-2-103 – Share of Heirs Other Than Surviving Spouse
- Descendants first. Children, grandchildren, and further descendants share by representation. If a child died before the decedent but left children, those grandchildren step into their parent’s share.
- If no descendants survive, the estate passes to the decedent’s parents equally, or to the surviving parent alone.
- If no parents survive, the estate goes to descendants of the decedent’s parents, meaning siblings, then nieces and nephews. Half-siblings inherit the same as full siblings.
- If none of those relatives survive, the estate splits between the maternal and paternal sides, going to grandparents or their descendants on each side.
- If no blood relatives survive on either side, descendants of a predeceased spouse can inherit.
When no heir at all can be found under these categories, the estate escheats to the state.
Adopted Children and Stepchildren
Adopted children inherit exactly the same as biological children. The Uniform Probate Code’s definition of “child” specifically excludes stepchildren, foster children, and grandchildren.4Justia. New Mexico Code 45-1-201 – Definitions
A stepchild does not inherit from a stepparent by intestate succession, even after decades of being raised in the home. The only ways to pass property to a stepchild are legal adoption, a will, or a beneficiary designation. Families who assume otherwise often discover the rule too late.
Spouse and Family Allowances During Probate
Two protections put money in the hands of the surviving spouse or dependent children before general heirs and most creditors see anything.
The surviving spouse is entitled to a family allowance of $30,000 from the estate, regardless of what the will says or how intestate succession divides the rest.5Justia. New Mexico Code 45-2-402 – Family Allowance With no surviving spouse, the $30,000 is divided among the decedent’s minor and dependent children. This allowance has priority over almost every other claim against the estate.
On top of that, the surviving spouse can claim up to $15,000 in personal property, such as household furnishings, appliances, and personal effects. If there is no surviving spouse, the decedent’s children take this exempt property allowance. It also has priority over general debts.
Making a Valid Will
To be valid in New Mexico, a will must be in writing, signed by the person making it (or by another person at their direction and in their presence), and signed by at least two witnesses. Each witness must have watched the will being signed and must sign in the presence of both the testator and each other.6Justia. New Mexico Code 45-2-502 – Execution; Witnessed or Notarized Wills
A handwritten (holographic) will can also be valid under New Mexico’s version of the Uniform Probate Code, provided the material portions are in the testator’s own handwriting. Proving one after death is harder, and disputes are more likely, so relying on a holographic will when a witnessed will is available is a risk with no upside.
A valid will lets you override intestate succession, name the personal representative who will manage the estate, and designate guardians for minor children. Without one, the probate court decides those questions using the statutory defaults.
Assets That Pass Outside Probate
A will controls only the assets that don’t already have a transfer mechanism built in. Several common assets pass automatically to a named beneficiary, and those designations override the will.
- A transfer on death deed lets a real estate owner name a beneficiary who receives the property automatically at death, with no probate. The owner keeps full control during life, including the right to sell, refinance, or revoke the deed.7Justia. New Mexico Code 45-6-416 – Optional Form of Transfer on Death Deed
- Payable on death designations on bank accounts, savings accounts, and certificates of deposit let the beneficiary claim the funds after death by presenting a death certificate and identification. The beneficiary has no access while the owner is alive.
- Life insurance proceeds and retirement account balances go directly to the named beneficiary, bypassing both probate and the will. Beneficiary designations need to be reviewed after divorce, remarriage, or the death of a named beneficiary, or the money can end up in the wrong hands.
- Property held in joint tenancy with right of survivorship passes automatically to the surviving co-owner.
For many families the non-probate assets outweigh the probate estate, which makes keeping beneficiary designations current at least as important as writing a good will.
Small Estate Shortcut
If the total value of the estate, minus debts and liens, is $50,000 or less, a successor can collect and distribute assets using a small estate affidavit instead of going through formal probate. At least 30 days must have passed since the death, and no application for a personal representative can be pending or already granted.8Social Security Administration. GN 02315.069 – New Mexico Small Estates
Creditor Claims and Payment Order
The estate has to pay debts before heirs receive anything. The personal representative can publish a notice to creditors in a local newspaper once a week for three consecutive weeks, which starts a four-month deadline. Creditors who miss it are permanently barred.9Justia. New Mexico Code 45-3-801 – Notice to Creditors Known creditors who receive direct written notice have the later of four months after publication or 60 days after the mailing.
Debts are paid in priority order: administrative costs first (court fees, attorney fees), then funeral expenses, taxes, secured debts like mortgages, and finally unsecured debts like credit cards and medical bills. Heirs receive their shares only after everything above them is paid. If the estate is insolvent, lower-priority creditors and heirs can end up with nothing. The family and exempt property allowances outrank general creditors, so the surviving spouse and minor children keep some protection even when the estate is underwater.
Estate and Inheritance Taxes
New Mexico does not have a state estate tax or a state inheritance tax.10Tax Foundation. Estate and Inheritance Taxes by State, 2025 Only 12 states and the District of Columbia levy estate taxes, and only five states impose inheritance taxes. New Mexico is on neither list.
Federal estate tax still applies to very large estates. Under the One, Big, Beautiful Bill Act signed into law on July 4, 2025, the federal estate tax exemption rises to $15,000,000 per individual for 2026, with inflation adjustments starting in 2027.11Internal Revenue Service. What’s New – Estate and Gift Tax Married couples can shelter up to $30 million combined through portability. Estates below these thresholds owe no federal estate tax.
Separately from the estate tax, an estate that generates more than $600 in gross income during administration (rental income, dividends, interest) has to file Form 1041. Income distributed to beneficiaries is reported to them on Schedule K-1 and taxed on their own returns.12Internal Revenue Service. File an Estate Tax Income Tax Return
Contesting a Will or Removing a Personal Representative
A formal testacy proceeding can result in a court order determining whether the decedent left a valid will and identifying the heirs. That order is final as to all issues the court considered or could have considered.13Justia. New Mexico Code 45-3-412 – Formal Testacy Proceedings; Effect of Order; Vacation
A will can be challenged on three main grounds: undue influence, meaning someone pressured or manipulated the decedent; lack of testamentary capacity, meaning the decedent did not understand what they owned, who their heirs were, or what the will would do; and improper execution, meaning the will didn’t meet the statutory signing and witnessing requirements. Each of these requires actual evidence, and the person contesting bears the burden of proof.
Beneficiaries who believe the personal representative is mishandling the estate can petition the court for removal. Grounds include embezzlement or self-dealing, failure to communicate with beneficiaries, failure to appear at court proceedings, and general incompetence that reduces the estate’s value. A serious change in the representative’s circumstances, such as a major health condition or pending criminal charges, can also support removal.
Disputes also arise without a full will contest, most often over whether particular assets are community or separate property. When funds have been commingled over years of marriage, sorting out what belongs where can require expert accounting help, and the answer changes what the surviving spouse and the descendants each receive.