More Americans are choosing to live together without getting married than at any point in history. Pew Research estimates that roughly 18 million Americans currently cohabit with a partner outside of marriage, and for many, this is a conscious, long-term choice — not just a stepping stone.
But the legal system was not built for this. Every default legal rule — intestacy, spousal rights, healthcare decision-making, automatic joint property inheritance — assumes marriage. Unmarried partners have none of these automatic protections, regardless of how committed or long-standing the relationship.
Here's why you need more than a will — and what a complete protection plan looks like.
Let's be direct about what you don't have without legal documentation:
Under every U.S. state's intestacy laws (what happens when you die without a will), unmarried partners receive nothing. Zero. Your entire estate goes to legal relatives in this order:
If you have no surviving relatives, your estate escheats to the state government before your partner would receive anything.
Hospitals defer to "next of kin" for medical decisions when a patient is incapacitated. The legal definition of next of kin does not include unmarried partners. If you're in a serious accident, your partner may be barred from the room while your parents — whom you haven't spoken to in years — make decisions about your medical care.
Without a power of attorney, your partner cannot access your bank accounts, pay your bills, or manage your finances during an extended illness or incapacity. They cannot negotiate with creditors on your behalf or handle your taxes. Each of these requires explicit legal authority.
Unless property is titled as joint tenants, your partner has no right to your share of your home, vehicles, or personal property. Even if you've lived there for 20 years and paid half the mortgage, if the deed is in your name alone, your legal heirs inherit your share — not your partner.
A will explicitly names your partner as beneficiary. Without a will, they get nothing from your estate under intestacy. With a will, you control what they receive.
Important limitations of a will for unmarried partners:
A will is necessary but not sufficient. Think of it as the foundation, not the complete structure.
A living trust is often a better primary estate planning tool for unmarried couples because:
This single document prevents the nightmare scenario: your partner excluded from medical decisions while estranged family members make choices you would never want.
What to include:
Distribution: both partners should carry a copy, file with primary care physician, and have digital copies accessible on their phones.
Documents your own medical wishes for end-of-life situations. Relieves your partner from having to guess about life support, CPR, feeding tubes, and organ donation. Provides clear legal guidance that doctors must follow regardless of what family members prefer.
Gives your partner authority to manage finances during incapacity:
Without this, your partner cannot manage your financial life during a prolonged illness — they would need to petition a court for guardianship, which is expensive, time-consuming, and uncertain.
A cohabitation agreement is a contract that establishes your financial rights and obligations as a couple. It addresses both what happens during the relationship and what happens if it ends (either through death or separation).
Key provisions:
ExpatLegalWills and similar services provide cohabitation agreement templates, though complex financial situations may warrant attorney review.
How you hold title to your home and other significant property is as important as your estate planning documents:
| Title Type | Effect at Death | Best For |
|---|---|---|
| Joint tenancy with right of survivorship (JTWROS) | Survivor inherits automatically; no probate | Equal-ownership couples wanting clean transfer |
| Tenancy in common | Each share passes through estate; requires will/trust | Unequal ownership; inheritance to children from prior relationship |
| One name only | Passes per will/trust; risk if no documents | Generally avoid for shared homes |
| Held in living trust | Passes per trust; maximum protection | Complex estates; privacy priority |
Update all financial accounts to name your partner:
Carol and Patricia had been together for 20 years in a state without common law marriage. They owned their home together — but in Carol's name alone (Patricia had credit issues when they bought it). They had separate finances, though Patricia had been contributing to household expenses for years.
Carol died in a car accident at 62, no will. Under intestacy, Carol's estate — including the house — went to her adult son from a previous relationship. Patricia was given 60 days to vacate the home she had lived in for 18 years.
The legal outcome was unambiguous. No fraud, no injustice in the technical sense — just a complete absence of documents that would have taken a few hours and a few hundred dollars to create.
A joint tenancy deed for the home would have cost $200 to record. A will would have cost $199 on an online platform. A total of under $400 would have completely changed this outcome.
ExpatLegalWills provides comprehensive estate planning documents for unmarried and non-traditional couples, including cohabitation agreements, wills, and healthcare directives.
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Some couples assume they have "common law marriage" after living together for a certain number of years. This is a myth in most states. Common law marriage is only recognized in:
Colorado, Iowa, Kansas, Montana, New Hampshire (inheritance only), Oklahoma, Rhode Island, South Carolina, Texas, Utah, and Washington D.C.
Even in these states, specific requirements must be met — it's not automatic based on cohabitation length alone. The requirements typically include: a mutual agreement to be married, living together as a couple, and publicly presenting as a married couple.
If you're not in one of these states, common law marriage does not exist regardless of how long you've been together or how committed your relationship is.