Most roommate disputes aren't about anything dramatic. They're about dishes in the sink at midnight, a friend who's been sleeping on the couch for two weeks, or who owes what when the electric bill spikes in January. A written roommate agreement doesn't prevent all of that—but it gives everyone something to point to instead of an argument.
Why You Need One Even If You Trust Each Other
Signing a roommate agreement with a close friend can feel awkward. Do it anyway. Memory is unreliable, circumstances change, and what feels like a mutual understanding in September often turns into a disagreement by March. The agreement isn't a sign of distrust—it's just a record of what you both agreed to when things were calm.
Without one, you're also exposed in practical ways. If your name is on the lease and your roommate stops paying rent, you're on the hook to the landlord regardless of your private arrangement. A written agreement gives you documentation if you ever need to recover money or sort out a deposit dispute. As BostonApartments.com notes on rent receipts, having a paper trail protects both parties when disagreements come up later—the same logic applies to any financial arrangement between people sharing a home.
The Core Financial Terms
Start with money, because that's where most serious problems come from.
- Rent split: Write down exactly who pays how much and when. If it's not 50/50—because one room is larger, or one person has a parking spot—spell out the reasoning so it's not relitigated later.
- Utilities: List each utility (electric, gas, internet, streaming subscriptions you're splitting), who pays the bill, and how reimbursement works. Set a deadline—"within five days of receiving the bill" is clearer than "when you get around to it."
- Security deposit: Record who contributed what and how it gets divided when someone moves out. This prevents one person from walking away with more than their share.
- Shared supplies: Toilet paper, dish soap, trash bags—decide whether you split these costs or each buy your own. Either system works; having no system doesn't.
House Rules: The Stuff That Actually Causes Conflict
The financial section is straightforward. This part takes more thought.
- Chores: A rotating schedule is more durable than vague agreements to "keep things clean." List specific tasks—vacuuming, bathroom scrubbing, taking out trash—and how often each needs doing.
- Quiet hours: If one of you works early shifts and the other keeps late hours, agree on a window when noise stays low. 10 p.m. to 7 a.m. is a common baseline, but adjust for your actual schedules.
- Guests and overnight visitors: How many nights per week can a partner or friend stay before it becomes a problem? Three nights is a reasonable threshold many roommates use. Beyond that, it starts affecting shared spaces and utility costs, and it can complicate your lease terms depending on what your landlord allows.
- Common areas: Who gets storage space in the living room? Can someone put their bike in the entryway? Small space conflicts are easier to prevent than resolve.
- Dishes and kitchen use: Be specific. "Clean your dishes the same day" is enforceable. "Keep the kitchen tidy" is not.
Move-Out Terms and Notice
People's situations change—jobs, relationships, finances. Your agreement should address what happens when someone wants or needs to leave.
- Notice period: Thirty days is the standard minimum, but sixty days gives everyone more breathing room to find a replacement. Match it to your lease terms where possible.
- Replacement roommates: Does everyone have veto power over a new roommate? Who manages the search? Decide this before it's urgent.
- Early departure: If someone leaves before the lease ends, are they responsible for rent until a replacement is found? Put a cap on it so the terms feel fair.
If you're browsing Boston listings and still lining up a roommate, sorting out these terms before you sign a lease together is much easier than revisiting them after move-in.
How Detailed Should It Be?
Long enough to cover the situations most likely to come up, short enough that both people actually read it. Two to three pages is typical. You don't need legal language—plain sentences work fine. Both people should sign and date it, and each should keep a copy.
A few things to include that people often forget: thermostat settings (genuinely a source of conflict when heating bills arrive), rules about smoking or vaping indoors, and whether pets are allowed if your lease permits them.
You don't need a lawyer to write this. Templates are easy to find, but even a shared Google Doc you both edit and agree to is better than nothing.
Find the Right Roommate First
An agreement helps manage differences, but it works better when there's already some basic compatibility. Before you write anything down, it helps to know whether your habits and expectations actually line up. Take the compatibility quiz to see where you and a potential roommate match—or where you'll need to negotiate—and post a free ad on RoommateAds to find someone worth making an agreement with in the first place.