Short answer: yes, especially if you're not married.
Long answer: it depends on your situation, but the situations where it matters most are more common than most couples realize.
What a cohabitation agreement actually does
A cohabitation agreement is a private written contract between two people who live together. It covers how you'll handle:
- Shared and separate finances
- Property bought before and during the relationship
- Debts each person is responsible for
- What happens to shared property and housing if the relationship ends
- How you'll resolve disputes
It's not a prenuptial agreement (that's for married couples). It's not a legal requirement. It's a documented understanding between two people who've decided to share a home.
Who needs one most
Couples with unequal incomes. When one partner earns significantly more, financial arrangements that "feel fair" in conversation can create serious imbalance over time. A written agreement locks in what you actually agreed to.
Couples where one partner owns property. If one partner owns the home the other is moving into, there are real legal questions about whether the non-owning partner builds any equity interest over time. Document this explicitly.
Couples with pets. Pets are property under most U.S. state laws. Without documentation, a breakup creates a legal gray zone over who owns the animals you've both been raising.
Couples who've been together a long time. The longer you've cohabitated without an agreement, the more entangled your finances and property become — and the harder a separation gets.
Couples with one name on the lease. If one person isn't on the lease, they may have very limited rights to remain in the home if the relationship ends. A cohabitation agreement can document their contribution and establish reasonable notice requirements.
Who thinks they don't need one — until they do
Most couples who end up in conflict over finances, property, or a breakup also thought they didn't need a written agreement. They trusted each other. They didn't want to be "that couple." They assumed their shared understanding was a legal agreement.
It isn't.
Memory diverges. Circumstances change. People who loved each other become people who can't agree on who gets the couch.
What it costs to not have one
If the relationship ends without a documented agreement, you're left with:
- Informal recollection of who agreed to what, which rarely matches
- No legal standing for verbal agreements in most states
- Negotiation under emotional stress, which is the worst time to negotiate anything
- Potential court involvement for significant disputes over property or housing
What it costs to have one
About 5 minutes.
Our free cohabitation agreement generator walks you through each section — finances, property, pets, separation terms — and produces a ready-to-sign document you can download immediately.
You don't need a lawyer for this. You need each other's honest answers and a form that turns them into a document.