This story starts with a boyfriend. Specifically, my roommate Sarah's boyfriend, who I'll call Tom because that's not his name and I'm not trying to get sued.
Tom started staying over on weekends. Then weekends plus Tuesday nights. Then "just Tuesdays and Thursdays and most weekends but he has his own place so it's fine." By month three, Tom was showering at our apartment four times a week, doing laundry at our apartment, and receiving mail at our apartment. But he "wasn't living there."
I didn't say anything for two months because I didn't want to be "that roommate." You know the one. The roommate who counts overnight stays and keeps a spreadsheet of who uses the shower. I didn't want to be her. But I also didn't want to pay equal rent while supporting a third person who wasn't on the lease.
The breaking point was the water bill. It went up $38. The electricity went up $24. Over three months, Tom's "not living here" lifestyle cost me about $60 in extra utilities. Not a lot, but enough to be annoying. And the principle mattered more than the money.
I brought it up on a Sunday afternoon because I've learned that Sunday afternoons are the only acceptable time for roommate money conversations. I didn't accuse anyone. I just said: "Hey, so the bills have been higher and I think it's related to usage. Should we figure out a guest policy so we're all on the same page?"
Sarah was defensive at first. "He's not living here." I agreed. "I know. But he's here a lot, and that affects bills and space. I'm not mad. I just want us to have a rule so nobody has to guess."
We wrote a one-page guest policy. It took 20 minutes. Here's what it said:
**Overnight guests:** Max 3 nights per week per roommate. If someone wants more, they pay an extra $50/month toward utilities.
**Common space:** If a guest is in the living room for more than 4 hours, they're using shared space and the roommate should check with others.
**Bills:** If a guest is here more than 3 nights a week for more than two weeks, they contribute to utilities.
**Notice:** Give 24 hours heads up for overnight guests when possible. Not permission, just courtesy.
**The talk:** If anyone feels like a guest has become a de facto roommate, we have a conversation within a week. No waiting until resentment builds.
That's it. One page. We all signed it. Tom started staying over two nights a week instead of four. Sarah paid the extra utility share when he stayed more. Our water bill went back to normal. And more importantly, Sarah and I stayed friends.
The policy didn't solve the problem by punishing anyone. It solved the problem by removing ambiguity. Before the policy, "a lot" meant different things to different people. After the policy, "3 nights" meant 3 nights. No guessing. No resentment.
If you're living with roommates and someone's partner is starting to feel like a third roommate, have the conversation now. Not when you're angry. Not when you've already calculated how much extra money it's costing you. Now. Use the calculator on this site to figure out what "fair" looks like for your specific situation, then write it down.
A simple guest policy takes 20 minutes to write and can save a friendship. That's a pretty good return on investment.