Unmarried Partner Inheritance Rights in Massachusetts: A Critical Gap

Two people build a life together for fifteen years. They share a home, share finances, care for each other through illness. When one of them dies without a will, the surviving partner discovers — often in a state of shock — that they have no legal right to a single dollar of their partner's estate.

This is not a hypothetical. It happens in Massachusetts regularly, and the outcome is legally brutal.

Massachusetts Gives Unmarried Partners Nothing

Massachusetts intestate succession law — the rules that govern who inherits when someone dies without a will — contains no provision for unmarried partners, regardless of the length or depth of the relationship. The law distributes assets to blood relatives and legal spouses in a defined order:

1. Surviving spouse
2. Children and their descendants
3. Parents
4. Siblings and their descendants
5. More distant relatives

If none of these relatives exist, the estate escheats to the Commonwealth of Massachusetts. An unmarried partner of twenty years comes before the state in exactly no scenario under intestate succession. They are legally invisible.

Massachusetts Does Not Recognize Common-Law Marriage

Some people believe — incorrectly — that a long-term, live-together relationship eventually becomes a "common-law marriage," granting the same rights as a legal marriage. This is not how Massachusetts law works.

Massachusetts does not recognize common-law marriages formed in Massachusetts. It never has. No matter how many years two people live together, how intermingled their finances are, or how they present themselves to the world, they are not legally married unless they obtained a marriage license and went through the formal ceremony.

The one exception: if a common-law marriage was validly formed in a state that does recognize them (a small number of states still do), Massachusetts may recognize that marriage as valid. But if the relationship formed and remained in Massachusetts, no amount of time or cohabitation creates any legal rights.

What Can Be Lost

The financial exposure for an unmarried surviving partner can be staggering. Consider what passes by default to blood relatives instead:

• A home held solely in the deceased partner's name — even if the surviving partner made mortgage payments for a decade
• Bank accounts in the deceased's name alone
• Retirement accounts without a named beneficiary
• A car
• Business interests
• Personal property: furniture, jewelry, collections

The surviving partner may be asked to vacate the shared home by the deceased's family. They may be unable to access bank accounts that paid the household bills. They may have contributed financially to assets for years and have no legal claim to any of it.

And unlike a surviving spouse, an unmarried partner has no right to a family allowance, no elective share of the estate, and no legal standing as an interested party in probate proceedings.

If you're a surviving partner navigating these rights in Massachusetts, the Massachusetts Survivor Benefits Navigator covers what you may still be able to claim — and how to document your position.

How to Protect an Unmarried Partner

The law does not protect unmarried partners automatically. Protection requires deliberate legal action during life. The tools available are entirely effective — but they require actually using them.

A Valid Will

The single most important protection for an unmarried partner is a valid Massachusetts will. A will can leave any or all of the estate to an unmarried partner, bypassing the intestate succession rules entirely. The will must meet Massachusetts execution requirements: signed by the testator, witnessed by two independent witnesses who are both present at the signing.

A handwritten (holographic) will is not valid in Massachusetts unless executed with the same witness requirements. Do not assume an unwitnessed handwritten document will hold up.

Beneficiary Designations on Every Account

Life insurance, retirement accounts (IRAs, 401(k)s), and bank accounts with POD (Payable on Death) designations all pass outside of probate directly to the named beneficiary. This is one of the most powerful and overlooked tools for unmarried partners.

Naming your partner as beneficiary on a $500,000 life insurance policy costs nothing and requires only a form. If you die without doing it and the policy defaults to the estate, your partner is back to square one.

Review beneficiary designations on:

• Life insurance policies (personal and employer group coverage)
• 401(k) and 403(b) plans
• IRAs (traditional and Roth)
• Bank accounts (set up POD designation at the bank)
• Brokerage accounts (set up TOD designation)

Joint Tenancy With Right of Survivorship on Real Estate

For shared real estate, title matters enormously. If a home is titled as joint tenants with right of survivorship, the surviving partner inherits the property automatically at death — outside of probate, regardless of what any will says.

If the home is in one partner's name alone, or held as tenants in common, it does not pass automatically. An unmarried surviving partner of a solely-owned home has no automatic right to remain there.

Changing the title to JTWROS requires a new deed. An attorney can prepare and record this for a few hundred dollars. The cost of not doing it can be losing the home.

A Living Trust

A revocable living trust allows you to transfer property to a trust during your lifetime, name your partner as beneficiary, and have the property pass automatically at death without probate. Trusts offer additional benefits: privacy (trust distributions are not public record, unlike probate), flexibility (the trustor can change the trust during life), and the ability to include conditions or timing on distributions.

For couples with significant assets or a complicated family situation, a living trust drafted by an estate attorney provides the most comprehensive protection.

Domestic Partner Benefits: A Narrower Category

"Domestic partner benefits" in the context of employer benefits (health insurance, life insurance, pension survivor options) are governed by each employer's specific policies, not Massachusetts law. Some employers extend benefits to registered domestic partners or cohabiting partners; others do not.

For Massachusetts public employees, the definition of eligible survivors for pension benefits is set by statute. MTRS and MSERS typically require a legal marriage for pension continuation benefits (Option C). An unmarried partner is generally not eligible for a pension survivor benefit unless the employee made a specific election that includes them — and most pension systems don't offer that option for unmarried partners.

Check directly with the employer and any applicable retirement system for the specific rules.

If Your Partner Has Died Without a Will

If you are a surviving unmarried partner and your partner died without a will, the situation is difficult but not necessarily hopeless. Consider:

Document any financial contributions: If you contributed to a mortgage, renovations, or other assets in the deceased's name, you may have equitable claims in certain circumstances. This is complex and requires legal counsel.

Check for any written agreements: Cohabitation agreements, written loan agreements, or other documents may establish legal claims even absent a will.

Look for beneficiary designations: Check all accounts for any beneficiary designations that name you. These control regardless of the absence of a will.

Consult an estate attorney immediately: Before the estate moves through probate, an attorney can advise whether any equitable claims exist and whether it's worth asserting them. The window to act may be short.

The Takeaway

Massachusetts law does not recognize emotional reality. Two people can build a life together for decades, and the law will distribute the deceased's estate to a distant cousin before it gives anything to the surviving partner — unless specific legal steps were taken in advance.

This is not a reason for despair; it's a reason for action. A will, updated beneficiary designations, and JTWROS title on shared real estate together constitute a complete legal shield against this outcome. Each of these steps is accessible, affordable, and takes far less time than people assume.

The gap in Massachusetts law for unmarried partners is real. The tools to bridge it are also real.

The Massachusetts Survivor Benefits Navigator covers survivor rights, government benefits, and estate steps for families navigating loss in Massachusetts — including guidance for unmarried partners on what they may still be able to claim.

See more Massachusetts guides →