How to Split the Cost of a Storage Unit With Roommates

You signed for a 10x10 storage unit because the apartment ran out of closet space. Now the bill lands every month and nobody wants to talk about it. Figuring out how to split the cost of a storage unit with roommates is one of those “we’ll deal with it later” tasks that turns into a Venmo fight by month three.

The short answer: split it by how much of the unit each person is actually using, not evenly. If one person is storing a couch and three bins and another is storing a bike, an even 50/50 split is not fair — and everyone knows it.

What’s the fairest way to split a storage unit with roommates?

Fairest is proportional to space used. Measure the unit in rough zones (front-left, back-right, top shelf, floor) and assign each roommate a percentage based on what they occupy. Multiply the monthly rent by that percentage. Someone using 60% of the unit pays 60%. Someone using 10% pays 10%. Everyone signs off before anything gets moved in.

Method 1 — Split by square footage

If your unit is 10x10 (100 sq ft), give each person a section. Tape the floor if you have to. Track it in a shared doc so nobody argues later.

Example: Alex takes 40 sq ft, Sam takes 30, Jordan takes 30. Rent is $180/mo. Alex pays $72, Sam pays $54, Jordan pays $54.

This works best when what you’re storing is bulky and obvious — furniture, seasonal gear, boxes.

Method 2 — Split by item count (when everything is small)

If it’s mostly bins and boxes, count them. Ten bins total, four are yours, you pay 40%. Simple and hard to argue with. Works for storage units full of clothes, books, or holiday decorations where volume isn’t wildly different per item.

Method 3 — Even split with a “big item” surcharge

If everyone’s storing roughly the same amount but one person shoved in a couch or a mattress, split the base rent evenly and add a flat surcharge for oversized items. $20/mo per big piece of furniture, paid by the owner. Feels fair without needing a tape measure.

Who pays the deposit and admin fees?

The person whose name is on the storage contract is legally on the hook — but that doesn’t mean they eat the deposit alone. Split the deposit and any one-time fees proportionally the same way you split the monthly rent. Write it down. When someone moves out, they get their portion of the deposit back (assuming their stuff is out and the unit isn’t trashed).

For the ongoing bill, one person pays the storage facility and the others reimburse monthly. If you’re already dividing rent and utilities, add this to the same system — don’t run a separate Venmo request for it every month. That’s how you end up with the same “did you send me for storage?” text every four weeks.

What happens when a roommate moves out and leaves stuff behind?

This is where it gets ugly. Set the rule upfront: if you move out of the apartment, you have 30 days to get your stuff out of the storage unit or it goes to the curb. Otherwise you’re paying rent on a unit half-full of your ex-roommate’s ski gear forever.

Put it in your roommate agreement before you sign the storage contract. “If you move out, you remove your items within 30 days or forfeit them and your share of the deposit.” That one line prevents 90% of the drama.

If they’ve already ghosted and left stuff behind, document everything (photos, dated), send one clear message with the 30-day deadline, and stop paying for their share after the deadline hits. If your name is on the contract, downsize to a smaller unit or cancel — you’re not obligated to store their stuff on your dime.

How homies handles it

homies. lets you set up a recurring shared expense for the storage unit, split by whatever percentage you agree on. Everyone sees the balance, gets reminders on the same day, and the split updates automatically if someone moves out. No math, no monthly Venmo request, no “wait, whose bin is that.” rooming, minus the drama. Join the waitlist at joinhomies.app.