Estate Planning for Unmarried Couples and Inheritance Rights

Why Unmarried Couples Need an Estate Plan

Here's the blunt version: without written documents, your partner receives nothing when you die and has no legal authority to speak for you if you're incapacitated. Marriage comes bundled with automatic legal rights. A partnership without a certificate does not, no matter how many years, homes, or kids you share.

This affects a large and growing group. More than 17 million unmarried adults live with a partner in the US, up from an estimated 6 million in 1996, and today's cohabiting couples tend to be older, more educated, and higher earning than in decades past. Some choose not to marry. Some are older couples keeping finances separate for adult children. Some are LGBTQ+ couples in states with weaker domestic-partnership recognition. The legal gap is the same for all of them.

The point of planning isn't to brace for a bad ending. It's to sit down together and decide, on the record, what you want for each other. You're creating alignment now so that a court, a hospital, or a distant relative doesn't get to decide later. That's a partnership decision, and it's one you make side by side.

How Inheritance Rights Work for Unmarried Partners

Intestate succession is the default rulebook every state has written for people who die without a valid will. It runs down a family tree: spouse first, then children, then parents, then siblings, then more distant relatives. An unmarried partner appears nowhere on that list in any state. If your partner dies without a will, their estate passes to their next of kin, and you have no standing to challenge it. The Consumer Financial Protection Bureau points to estate planning documents as the primary way to make your wishes stick when you're not married.

A common and costly assumption is that living together long enough creates a common-law marriage. Few states recognize it, and those that do require more than shared rent. As of 2026, common-law marriage is recognized in Colorado, Iowa, Kansas, Montana, Oklahoma (limited), Rhode Island, South Carolina (limited), Texas, Utah, and Washington DC. Even in those places, you generally have to hold yourselves out publicly as married and intend to be married. Assuming you're covered without checking your state's rules is a gamble with your partner's security.

The gap lands hardest on couples who've built the most together. A 30-year partner can be locked out of an ICU by a parent, or forced to move out of a home titled only in the deceased partner's name. None of that reflects the relationship. It reflects the absence of paperwork.

Essential Documents for Domestic Partner Estate Planning

A will is the most direct way to name your partner as a beneficiary and to choose your own executor (the person who administers your estate) rather than letting a court appoint one. For a will to be valid, it generally has to be in writing, signed by you, and witnessed by the number of witnesses your state requires. Some states also recognize handwritten (holographic) wills, but the formal, witnessed version leaves far less room for dispute.

A will only handles what happens after death. You also need documents for the living. A durable power of attorney for finances lets your partner handle bills, accounts, and legal decisions if you can't. A healthcare proxy (also called a medical power of attorney) names your partner to make medical decisions, and an advance directive or living will spells out your wishes for treatment. Without these, hospitals default to blood relatives. A HIPAA authorization is the piece couples most often forget; it lets your partner access your medical information at all, which even a healthcare proxy may need to function.

Because these documents interact and state formalities vary, working with a qualified attorney to draft and execute them is generally worth the cost. A complete package from an attorney typically runs $1,500 to $5,000, depending on complexity and where you live.

Beneficiary Designations and Property Titling for Couples

Here's the part that surprises people: your will does not control your retirement accounts, life insurance, or transfer-on-death and payable-on-death accounts. Those pass by the beneficiary line you filled out, and that designation overrides whatever your will says. If you never named your partner, or you named an ex years ago, that's where the money goes. Naming each other on every account with a beneficiary line is the single fastest way to make sure assets actually reach your partner.

How you title your home and joint accounts matters just as much, and the wrong choice can trigger a tax bill or send property to the wrong person.

Unmarried couples also miss several automatic spousal benefits. There are no Social Security survivor benefits for a partner. There's no IRA spousal rollover, which changes how an inherited retirement account can be handled. And there's no unlimited estate tax marital deduction, the rule that lets spouses pass unlimited assets to each other tax-free. For 2025, the federal estate and gift tax exemption is $13.99 million per person, and gifts above the $19,000 annual exclusion may require filing a gift tax return. A CPA can help you title assets and time transfers so you don't create an avoidable tax problem.

Cohabitation Agreements and Trusts as Planning Tools

A cohabitation agreement is a written contract between partners that outlines expectations for shared property, expenses, and what happens to jointly acquired assets if the partnership ends. Think of it as the clarity conversation put in writing: who owns what, who pays for what, and how you'll divide things you built together. It fills a gap that marriage would otherwise address by default.

A revocable living trust is a second tool worth considering. You move assets into the trust, name yourself as trustee while you're alive, and name your partner (and a successor trustee) to take over. Assets held in a properly funded trust pass to your partner without going through probate, which keeps the transfer faster, private, and harder to contest. For unmarried couples, avoiding probate matters because the process can otherwise expose your partner to challenges from relatives.

Used together, these documents create a plan that speaks clearly on both partners' behalf: a will for anything outside the trust, matched beneficiary designations, coordinated titling, powers of attorney for incapacity, and a cohabitation agreement setting shared expectations. Independent counsel for each partner is highly recommended for an enforceable agreement.

Building Your Plan With the Right Professionals

DIY forms handle the simplest cases, but unmarried couples usually have layers those templates miss: property titled the wrong way, beneficiary lines that conflict with a will, tax exposure from gifting, and state-specific formalities that can invalidate a document. Coordinated guidance from an attorney, a Certified Financial Planner (CFP), and a CPA keeps those pieces from working against each other.

That's the model Neptune runs. Neptune manages the full process end to end, pairing couples with attorneys who have 20+ years of experience, along with CFPs and CPAs, and guiding the conversations that turn intentions into enforceable documents. You're not left assembling a pile of forms and hoping they line up.

Good planning starts with an honest conversation about money, which is really a conversation about each other. As Michael C. Cotugno, Esq., Managing Partner, Neptune Legal, puts it: "Understanding a partner's relationship with money, their historical experiences of abundance or scarcity, their anxieties tied to financial stability, or their personal definitions of success, allows for a deeper, more empathetic understanding of them as a whole individual."

And this isn't a one-time filing. Beneficiaries change, laws change, and life changes, so a plan is something you revisit together. "The real work, the true magic, lies in the ongoing practice of conscious partnership each and every day." Couples who plan together, grow together.