Do you actually know what would happen to your security deposit if you and your partner broke up tomorrow?

Not what you assume would happen. Not what feels fair. What would legally happen, based on anything you have in writing right now.

Maya, 29, did not know. She and her boyfriend of two years signed a lease together in Austin, split the deposit 50/50, and moved in six months after dating seriously. They never wrote anything down beyond that lease. When the relationship ended 14 months later, he argued the furniture they bought together was his. She had no documentation. The security deposit went entirely to his account because his name appeared first on the lease. She walked away with her clothes, her dog, and a $4,200 lesson she is still paying off emotionally and financially.

Here is what nobody tells you: love does not create legal standing. Cohabitation agreements do.

Maya is not an outlier. She is the majority.

According to a 2023 report from the Pew Research Center, 59% of adults under 35 have lived with a romantic partner outside of marriage, making unmarried cohabitation the dominant living arrangement for young adults in the United States. And yet, a 2022 survey by LawDepot found that fewer than 9% of unmarried cohabitating couples had any written agreement governing their shared financial lives.

That gap is closing, slowly and meaningfully, because of a generation that watched their parents fight over furniture in divorce court and decided to do it differently before things got ugly.

Cohabitation agreements, once considered a niche legal tool for wealthy older couples, are now being downloaded, drafted, and signed by people in their mid-twenties who have only been together for eight months. They are not planning for failure. They are protecting the relationship they are actually trying to build.

Have you and your partner actually talked about what happens to your stuff if this ends? Not in a hypothetical, abstract, someday kind of way. In a specific, what-is-your-name-on kind of way.

If that question made your stomach tighten, keep reading.

Did You Know: A 2023 study by Avvo found that 71% of family law attorneys reported an increase in cohabitation agreement consultations from clients under 35 compared to five years prior. The most common trigger? A friend’s messy breakup, not their own.

Side A: The Practical Case for Putting It in Writing

A cohabitation agreement is a legal document that two unmarried partners sign before or shortly after moving in together. It can cover rent splits, what happens to shared property if the relationship ends, who owns the furniture, how joint bank accounts are handled, and what obligations each person has if one loses their income.

It is not a prenuptial agreement. It does not require marriage as a precondition. And it does not require a lawyer to be legally useful in many states, though having one review it makes it significantly stronger.

What surprises most people is how clarifying the process of writing one actually is. You are not just creating a legal safety net. You are having the conversations that most couples skip entirely because they feel too serious or too premature. Who pays what if one of us loses a job? What do we do with the couch we bought together? If I move across town for work and you do not want to come, what happens to this lease?

Those are not scary questions. Those are the questions that determine whether two people are actually compatible enough to share a bathroom for two years.

Warning: Verbal agreements about financial contributions between unmarried cohabiting partners carry almost no legal weight in a housing dispute. If your partner has been paying half the rent in cash, covering utilities, or contributing to furnishings without their name on any documentation, verbal contributions to rent, utilities, or furnishings are almost never recognized as legal claims in housing disputes without written documentation. If you have been operating on good faith and a handshake, you are not protected.

Side B: The Emotional Case, Because This Is Not Just About Money

Here is where it gets more honest.

Dr. Alexandra Orenstein, a licensed marriage and family therapist based in New York, has written extensively on what she calls “financial avoidance behavior” in young couples. Her 2022 research, published in the Journal of Couple and Relationship Therapy, found that couples who discussed financial expectations explicitly before moving in reported 34% higher relationship satisfaction at the 18-month mark than couples who did not.

The couples who skipped the money talk were not more romantic. They were more anxious.

Think about that for a second. The couples who did the uncomfortable work upfront felt better about their relationship 18 months later, not worse. The contract did not kill the romance. The silence was doing that instead.

Pro Tip: If the idea of a formal contract feels too cold, start with a shared Google Doc. Write down three financial expectations and three exit assumptions together. What you owe each other on the lease. Who keeps what if you separate. How you handle a financial emergency. That document is already a cohabitation agreement. It just does not have a lawyer’s name on it yet.

If you are reading this at 2am wondering whether you are being paranoid or practical, this paragraph is for you. You are not paranoid. You are noticing something real. The person who loves you can also be the person who, in the middle of heartbreak, forgets what was fair. Not because they are a bad person. Because grief makes people selfish. Because hurt makes people protective. Because without a document, “what I remember” is all either of you has to go on.

I have been in that exact conversation. It is not comfortable. Writing it down ahead of time is.

If your partner lost their job tomorrow, do you have anything in writing about how rent gets covered? If that question has no clean answer, you already know what the next conversation needs to be.

It is messier than the advice columns suggest. And that is exactly why it matters.

What the Script Actually Sounds Like

Here is a communication script you can use, word for word, if you do not know how to start this conversation.

“I want us to talk about something practical before we move in. Not because I am worried about us, but because I want us to both feel secure. I want to put together a simple written agreement about how we handle finances, the lease, and what happens to our stuff if things ever change. I think it will actually make me feel closer to you, not further away. Can we do that together this weekend?”

That is it. That is the whole script. No ultimatum. No accusation. Just two people choosing clarity over assumption.

Your Next 3 Steps

Step 1: Go to LawDepot or Rocket Lawyer tonight and download a free cohabitation agreement template. Read it together this weekend, not alone, so it becomes a shared conversation rather than a document one of you is presenting to the other.

Step 2: Open a shared Google Doc with your partner this week and write down three financial expectations: how rent is split, who owns the security deposit, and what happens to shared furniture if you separate. Starting with three specific items makes the conversation feel manageable rather than overwhelming.

Step 3: Book a 30-minute consultation with a family law attorney in your state. LegalZoom and Avvo both offer free or low-cost initial consultations, and you do not have to be in crisis to use them. Getting a professional review of any agreement you draft adds legal enforceability and takes the guesswork out of whether your document actually protects you.

Maya has a cohabitation agreement now. She is seeing someone new, and three months before they moved in together, they sat down and wrote out exactly what each of them owned, what they were contributing, and what they would each walk away with if it ended. She said it was the least romantic evening of her life and one of the most important.

You deserve to know this before you sign a lease and hope for the best.