Finances for Unmarried Couples

Finances for unmarried couples covers the deliberate planning unmarried partners need to replicate the legal protections marriage provides automatically: inheritance rights, medical and financial decision-making authority, and beneficiary treatment. None of these attach to a relationship on their own, regardless of its length or how publicly the couple presents themselves as a family.

Inheritance is the starkest gap. Without a will, intestate succession statutes distribute a decedent's property to a defined list of relatives, typically a spouse, children, parents, then siblings, that does not include an unmarried partner at all, no matter how many years the couple lived together. A will is the only mechanism that lets an unmarried partner inherit by default the way a spouse automatically would.

Decision-making authority during incapacity works the same way. State default surrogate laws generally look to a spouse, adult children, or parents when someone is incapacitated and hasn't named an agent; an unmarried partner typically isn't anywhere on that list. A healthcare power of attorney and a financial power of attorney, each naming the partner explicitly, do for an unmarried couple what marriage does automatically for a married one, and without them a partner can be legally shut out of both medical and financial decisions during exactly the crisis when they matter most.

Beneficiary designations and titling sit outside a will entirely. Retirement accounts, life insurance policies, and payable-on-death bank accounts pass according to whoever is named on the account itself, regardless of what any will says, so keeping those designations current, and naming a partner where that's intended, matters at least as much as the will. Similarly, how jointly acquired property is titled, as joint tenants with right of survivorship, where a deceased owner's share passes automatically to the survivor, or as tenants in common, where it does not, determines what happens to shared property independently of either partner's will.

Government benefits and marriage-conditioned tax rules don't extend to unmarried partners either. Spousal and survivor Social Security benefits require marriage; length of relationship alone does not substitute for it in the large majority of states, though a small number of states still recognize common-law marriage under their own specific requirements, which shouldn't be assumed without confirming the actual rule where the couple lives. The unlimited marital deduction and similar marriage-only tax treatment likewise don't apply, so a sizable transfer to an unmarried partner can carry estate or gift tax exposure that an equivalent transfer between spouses would not.

Because property and financial arrangements between unmarried partners aren't governed by the marital property and divorce laws that apply to spouses, a cohabitation agreement, addressing shared expenses, jointly acquired property, and what happens if the relationship ends, functions as the unmarried-couple substitute for several of the defaults marriage would otherwise supply.

Addressing the gap generally means working through each default marriage would have supplied and building its equivalent directly: wills naming each other as intended, financial and healthcare powers of attorney naming each other as agent, current beneficiary designations on retirement and insurance accounts, a deliberate choice of how jointly acquired property is titled, and a cohabitation agreement if significant shared property or expenses are involved.

A hypothetical illustration of the inheritance gap. Jordan and Casey live together for 15 years and jointly own a $500,000 home as tenants in common, each holding a 50% interest, worth $250,000 apiece (500,000 ÷ 2 = 250,000). Neither has a will. When Jordan dies unexpectedly, Jordan's $250,000 share does not pass to Casey. Under intestate succession it goes to Jordan's parents, since the statute recognizes no spouse and no children for Jordan. Casey, who has lived in the home for 15 years, now co-owns it with Jordan's parents instead of owning it outright. A will naming Casey as beneficiary of that share, or titling the home as joint tenants with right of survivorship instead, would have prevented the outcome entirely. All figures are hypothetical.

What deliberate planning achieves

• Replicates the core protections marriage would have provided automatically, inheritance, medical and financial decision authority, without requiring marriage itself.
• Documents can be tailored precisely to what the couple actually wants, rather than to defaults designed around a different relationship structure.
• A cohabitation agreement can address the couple's real financial arrangement directly, instead of leaving it to whatever a court would otherwise apply.

What can still go wrong

• None of it happens automatically, so a couple that hasn't done the paperwork has none of these protections, regardless of how long they've been together or how committed the relationship is.
• State law on cohabitation agreements, common-law marriage, and default surrogate decision-making varies, so an assumption based on general knowledge may not match the couple's actual state.
• Every document has to be kept current as the relationship, assets, or intentions change, since nothing about the relationship itself updates them the way marriage's built-in defaults would.