June 27, 2026 · 4 min read

Cohabitation vs Marriage: Legal Differences

You've been living together for 3 years. You split rent, share a pet, and combined finances. But legally, you're strangers. Here's what unmarried couples need to know.

No Automatic Legal Protections

Married couples get automatic rights: inheritance, medical decisions, property division upon divorce. Unmarried couples get none of these. If your partner is hospitalized, you may not even be allowed to visit — their parents decide, not you.

What a Cohabitation Agreement Does

It's a contract between unmarried partners that covers: financial arrangements, property ownership, debt responsibility, pet custody, and what happens if you separate. Think of it as creating your own legal framework where the law doesn't provide one.

Common Law Marriage Myth

Only 8 US states recognize common law marriage — and even then, simply living together isn't enough. You must hold yourselves out as married (joint tax returns, shared last name, referring to each other as spouses). Most cohabiting couples don't qualify.

The Conversation Nobody Wants to Have

Talking about what happens if you break up feels unromantic. But having the conversation now — while you like each other — is far easier than fighting over assets during a breakup. A cohabitation agreement makes the conversation structured and fair.