Massachusetts Intestate Succession: Who Inherits When There Is No Will

When a Massachusetts resident dies without a valid will, state law decides who inherits everything. The Massachusetts Uniform Probate Code (MUPC) has a fixed hierarchy — and it does not care about the length of a relationship, the degree of financial dependence, or anyone's reasonable expectations. The rules are rigid, the results are sometimes surprising, and for unmarried partners in particular, the outcome can be devastating.

How the MUPC Distributes Assets Without a Will

The intestate succession rules under G.L. c. 190B §§ 2-101 through 2-114 follow a strict priority order. Only legally recognized relatives in the line of succession can inherit through intestate probate.

Scenario 1: Surviving Spouse, No Children, No Living Parents

The surviving spouse inherits 100% of the intestate estate. This is the cleanest outcome and the most common for long-married couples without surviving parents.

Scenario 2: Surviving Spouse and Children — All Children Shared

If all of the decedent's surviving descendants are also descendants of the surviving spouse, and the surviving spouse has no other living descendants from a different relationship, the surviving spouse again inherits 100% of the estate. This scenario covers most typical nuclear families.

Scenario 3: Surviving Spouse With Children — But the Spouse Has Other Children

If the surviving spouse has living descendants from a relationship other than the current marriage, the distribution changes. The surviving spouse receives the first $200,000 plus three-quarters of the remaining estate. The balance passes to the decedent's descendants.

Scenario 4: Surviving Spouse and the Decedent's Non-Shared Children (Stepchildren to the Survivor)

If the decedent leaves children who are not descendants of the surviving spouse — meaning the surviving spouse is their stepparent — the surviving spouse's share drops to the first $100,000 plus one-half of the remaining estate.

Scenario 5: Surviving Spouse and Surviving Parents, No Children

If the decedent has no living descendants but has a surviving parent, the surviving spouse receives the first $200,000 plus three-quarters of the remaining estate. The remainder passes to the decedent's parents.

Scenario 6: No Surviving Spouse

Assets pass to the decedent's descendants (children, then grandchildren by representation), then to parents, then to siblings and their descendants, then to more distant relatives. If no living relatives can be found, the estate escheats to the Commonwealth of Massachusetts.

The Most Important Rule Most Families Don't Know

Unmarried domestic partners inherit nothing under Massachusetts intestate succession law.

This is not a minor technical limitation — it is a complete bar. Under G.L. c. 190B, Massachusetts provides zero intestate inheritance rights to unmarried partners, regardless of:

• The length of the relationship
• Years of shared finances or cohabitation
• Financial dependence on the deceased
• Mutual intent to provide for each other

Without a valid will, a living trust, or direct beneficiary designations on specific accounts (such as a TOD/POD bank account or an IRA), an unmarried surviving partner has no legal claim to anything in the probate estate. Assets will bypass the partner entirely and flow to parents, siblings, or more distant blood relatives — people who may not have been part of the deceased's life for decades.

Massachusetts does not recognize common-law marriage. There is no pathway through the probate court to establish inheritance rights based on cohabitation alone.

If you are a surviving spouse working through what you're legally entitled to — and what steps protect those rights — the Massachusetts Survivor Benefits Navigator covers the full picture: intestate shares, the elective share, homestead protection, and property tax relief, in a single organized reference.

What "Surviving Spouse" Actually Means

For the purposes of intestate succession, a surviving spouse must have been legally married to the decedent at the time of death. A spouse who obtained a divorce decree before death is not a surviving spouse. A spouse who was separated but not yet divorced remains a surviving spouse with full statutory rights unless a valid will specifically disinherits them.

Remarriage after a previous death does not affect intestate rights in the current marriage.

How Debts Interact With Intestate Inheritance

Heirs do not inherit personal liability for the decedent's debts. Unsecured creditors may only collect from the probate estate itself — not from the heirs' personal assets — and only if they file a valid claim within one year of the date of death. After that window closes, unperfected claims are permanently barred under the MUPC.

However, the surviving spouse can still be held responsible for debts that were jointly held — a joint credit card, a co-signed mortgage, or a joint bank account with an overdraft. Those obligations exist independent of probate.

The Property Rights Surviving Spouses Often Don't Know They Have

Beyond the intestate share, Massachusetts law provides surviving spouses with several automatic protections that apply whether or not there is a will:

Elective share. Even if a will leaves a surviving spouse less than they would have received under intestacy, the surviving spouse generally has the right to take an augmented elective share under the MUPC. The specifics depend on the length of the marriage and the composition of the augmented estate.

Homestead protection. A declared homestead transfers automatically to the surviving spouse and minor children under G.L. c. 188, § 10 — no additional filing required during probate.

Property tax relief. Surviving spouses may qualify for municipal property tax exemptions under Clause 17D of G.L. c. 59, § 5. The application must be filed with the local Board of Assessors on or before April 1 of the applicable tax year. Miss this deadline and no extension is available — the assessor has no legal authority to waive it.

When Intestate Succession Is Not the Whole Story

A significant portion of assets do not pass through intestate succession at all. Life insurance proceeds, retirement accounts (IRAs, 401(k)s), and payable-on-death bank accounts transfer directly to named beneficiaries regardless of what the MUPC says. Joint tenancy property with right of survivorship passes to the surviving joint tenant by operation of law.

This means that even when someone dies without a will, the surviving spouse may already own or be entitled to the most valuable assets outright. The intestate share through probate may cover only a fraction of the total financial picture.

Understanding the full scope — what passes through probate, what transfers outside of probate, and what requires an affidavit or claims filing — is the starting point for protecting your position as a surviving spouse. The Massachusetts Survivor Benefits Navigator works through each step in the sequence they actually need to happen, covering everything from probate pathway selection to benefit claim windows.

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