Estate Planning for Unmarried Couples in Long Island

If you and your partner live together in Nassau or Suffolk County but have never legally married, here is the fact that surprises most couples: under New York law, your partner is a legal stranger to your estate. Estate planning for unmarried couples in Long Island is not optional fine-tuning — it is the only thing standing between your partner and total exclusion. New York’s intestacy statute, EPTL 4-1.1, distributes the property of someone who dies without a will to a spouse, children, parents, and siblings, in that order. An unmarried partner of twenty years appears nowhere on that list and inherits nothing by default. New York abolished common-law marriage in 1933, so no amount of time living together creates a legal claim. Without deliberate documents, the person you built a life with has no automatic right to your home, your bank accounts, your retirement, or even a say in your medical care.

Why New York Treats Unmarried Partners as Strangers

Married couples enjoy dozens of automatic legal protections — the right of election, intestate succession, spousal healthcare authority, estate-tax marital deductions, and priority to administer an estate. None of these flow to unmarried partners, regardless of how committed or long-standing the relationship is. New York recognizes neither common-law marriage nor domestic partnership as a statewide estate-planning status. (New York City and a few municipalities maintain domestic-partnership registries, but they confer limited benefits and do not rewrite the EPTL.)

This means that for unmarried couples on Long Island, every protection a married couple takes for granted must be created on purpose through written legal instruments. The default rules are not just unhelpful — they are actively adverse, routing your assets and decision-making authority to blood relatives you may not have spoken to in years.

What “Intestate” Really Means for Your Partner

When someone dies without a valid will in New York, the Surrogate’s Court applies EPTL 4-1.1. For an unmarried person with no children, the estate typically passes to surviving parents, and if none, then to siblings, then to more distant relatives. Your partner is legally invisible to this process. Worse, those relatives — not your partner — have priority under SCPA 1001 to be appointed administrator of your estate, giving them control over your home and finances while your partner has no standing at all.

The Core Documents Every Unmarried Couple Needs

Because nothing is automatic, the planning framework for unmarried couples is built almost entirely from documents you sign while you are alive and well. The table below shows what each document does and what happens without it.

Healthcare Decisions: The Most Urgent Gap

Under New York’s Health Care Proxy law (Public Health Law Article 29-C), you may appoint anyone — including an unmarried partner — to make medical decisions when you cannot speak for yourself. Without it, the Family Health Care Decisions Act establishes a surrogate priority list that puts spouses, adult children, and parents ahead of a partner. Long Island hospitals such as North Shore University Hospital in Manhasset or Stony Brook University Hospital will follow that statutory list, not your relationship. A signed health care proxy and a HIPAA authorization are the difference between sitting at your partner’s bedside with decision-making power and being told you are “not family.”

Protecting the Long Island Home

For most couples, the house is the single largest asset — and on Long Island, often a substantial one. How title is held determines everything. Two unmarried partners can hold real property as joint tenants with right of survivorship, so that on the first death the home passes automatically to the survivor outside probate. If the deed instead reads “tenants in common,” each partner’s share passes through their own estate — meaning your relatives could inherit half the house your partner still lives in. Reviewing and, where appropriate, re-recording the deed at the Nassau or Suffolk County Clerk is one of the highest-impact steps an unmarried couple can take.

Real Long Island Scenarios

Consider how these rules play out in practice across Nassau and Suffolk:

1. The Massapequa homeowners. Two partners buy a home but the deed lists only one of them. That partner dies without a will. Under EPTL 4-1.1 the house passes to his estranged brother, who can list it for sale while the surviving partner has no legal right to stay.
2. The Huntington retirement account. A partner names her ex-spouse as the IRA beneficiary years earlier and never updates it. Beneficiary designations override a will, so the ex receives the account no matter what the will says.
3. The Smithtown hospital crisis. One partner suffers a stroke. With no health care proxy on file, the hospital turns to the patient’s adult daughter from a prior relationship for decisions, sidelining the partner of fifteen years.
4. The shared business in Garden City. Partners co-own a small business but never document succession. On one partner’s death, the deceased’s relatives inherit that interest and can force a sale or buyout, destabilizing the surviving partner’s livelihood.

Each of these outcomes is fully avoidable with documents that take far less time and expense than the litigation that follows when they are missing.

Common Mistakes Unmarried Couples Make

• Assuming time together creates legal rights. It does not. New York ended common-law marriage in 1933, and cohabitation alone confers nothing.
• Relying on a will alone. A will still passes through Surrogate’s Court, where disinherited relatives can mount a will contest. A revocable trust keeps transfers private and far harder to challenge.
• Forgetting beneficiary forms. Life insurance, IRAs, and 401(k)s pass by designation, not by will. Outdated forms naming a parent or ex undo your entire plan.
• Naming a partner as executor without a backup. Understand the scope of executor duties and always name a successor in case your partner cannot serve.
• Holding the home as tenants in common by accident. Many deeds default this way; without survivorship language, half the home leaves the surviving partner.
• Ignoring incapacity, not just death. A durable power of attorney under General Obligations Law 5-1501 prevents a guardianship proceeding where a relative — not your partner — controls your finances.

For unmarried couples, the law assumes nothing in your favor. Every protection a married couple receives automatically, you must grant deliberately and in writing.

When to Call an Estate Planning Attorney

If you own a home together, share financial accounts, have children from a prior relationship, run a business, or simply want your partner to inherit and to direct your care, you should not rely on do-it-yourself forms. The coordination among your will, trust, deed, beneficiary designations, and incapacity documents is exactly where unmarried couples get tripped up — a single mismatched beneficiary form can defeat an otherwise perfect plan. An attorney experienced in estate planning in Long Island can audit how each asset is titled, draft documents that the Nassau and Suffolk County Surrogate’s Courts will honor, and structure the plan to minimize exposure to the New York estate tax, which in 2026 applies above a state exemption set by the Department of Taxation and Finance.

For a broader overview of how these pieces fit together, our Long Island estate planning guide walks through the full framework. If you want to verify how the Surrogate’s Court process works in your county, the New York State Surrogate’s Court publishes county-level information for the 10th Judicial District covering Nassau and Suffolk. The takeaway for 2026 is simple: an unmarried partner protected by signed documents is secure; an unmarried partner protected only by love and time is, in the eyes of New York law, protected by nothing.

Frequently Asked Questions

Does my partner inherit anything if we lived together for years but never married?

No. New York’s intestacy statute, EPTL 4-1.1, gives nothing to an unmarried partner. Without a will, trust, or beneficiary designation naming your partner, your assets pass to blood relatives — a spouse, children, parents, or siblings. Time living together creates no legal claim.

Does New York recognize common-law marriage for Long Island couples?

No. New York abolished common-law marriage in 1933. No amount of cohabitation, shared finances, or holding yourselves out as a couple creates a marriage or any inheritance rights. You must create protection through signed estate-planning documents.

Can my unmarried partner make my medical decisions if I'm incapacitated?

Only if you sign a Health Care Proxy under Public Health Law Article 29-C naming them. Without it, New York’s surrogate priority list puts spouses, adult children, and parents ahead of an unmarried partner, so a relative would decide instead.

How should an unmarried couple hold title to a Long Island home?

Holding the deed as joint tenants with right of survivorship lets the home pass automatically to the surviving partner outside probate. If the deed reads tenants in common, each share passes through that partner’s own estate, which can send half the home to relatives.

Will a will alone fully protect my unmarried partner?

Not entirely. A will still goes through Surrogate’s Court, where excluded relatives can file a will contest. A revocable living trust passes property privately and is far harder to challenge, so most couples pair a will with a trust.

Do beneficiary designations override my will?

Yes. Life insurance, IRAs, and 401(k)s pass by beneficiary designation regardless of what your will says. Outdated forms naming a parent or former partner will defeat your plan, so review and update every designation.

Which court handles estates for unmarried partners on Long Island?

The Nassau County Surrogate’s Court in Mineola or the Suffolk County Surrogate’s Court in Riverhead handles estate administration, both within the 10th Judicial District. Without documents, your partner has no standing there to administer your estate or inherit.

What happens to our shared business if my partner dies without a plan?

The deceased partner’s business interest passes under EPTL 4-1.1 to their relatives, who can force a sale or buyout. A buy-sell agreement, trust, or will provision is needed to keep control with the surviving partner.