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Split the bill so nobody feels cheated
Rent, electric, internet, anything shared. Split it evenly, by bedroom size, or with a bump for whoever gets the private bathroom. The amounts add up to the exact cent.
Each person pays
The breakdown
| Person | Share | vs. even | Pays |
|---|
Worth knowing
This is a general estimate to help roommates agree on a split, not financial or legal advice. How you divide a bill between yourselves doesn’t change what you owe the landlord or utility company. On many leases, every tenant who signs can be held responsible for the full rent.
The three ways to split, explained
Equally
The total divided by the number of people. It’s the default for utilities and internet, and for rent when the bedrooms are roughly the same.
By room size
Each person’s share follows their bedroom’s square footage. The shared-space setting lets you split part of the bill equally first, since the kitchen and living room are everyone’s. That part is shared evenly, and only the remainder follows bedroom size.
Private bathroom adjustment
Everyone starts from an even share. Each person with a private bathroom pays a premium on top, and the total of those premiums is taken off the shares of the people who share a bathroom, so the bill still adds up.
Amounts are rounded to the cent so they add back to the exact total. When a bill doesn’t divide evenly, the leftover cent or two goes to whoever’s share was rounded down the most. The breakdown tells you when that happens.
Common questions
What’s the fairest way to split rent with roommates?
If the bedrooms are similar, split evenly. It’s simple and nobody has to measure anything. If one room is noticeably bigger, has a private bathroom, a balcony, or its own entrance, the person getting it usually pays more.
The fairest split is the one everyone agrees to before the lease is signed and rooms are picked. Once someone has moved into the big room, renegotiating gets awkward.
How do you split rent by room size?
Measure each bedroom (length × width in feet gives square feet), add them up, and give each person the percentage of the total their room represents. A 150 sq ft room out of 400 total bedroom square feet pays 37.5%.
Pure square footage can feel harsh on the person with the biggest room, because everyone uses the kitchen and living room equally. Setting part of the bill as shared space, split evenly before room size is applied, softens that.
How much more should the person with the private bathroom pay?
There’s no standard figure. It’s whatever the roommates agree is worth it. Some groups use a percentage on top of an even share, some agree a flat dollar amount per month. This calculator uses a percentage you set, and moves that money off the shared-bathroom roommates’ shares so the total stays the same.
A useful gut check: ask the person taking the private bath what they’d pay to keep it if someone else wanted it.
How should we split utilities if one person uses more?
Most roommates split utilities evenly, since tracking individual use is impractical. If one person clearly uses much more, like running a space heater all winter or working from home all day, agree on an adjustment up front rather than arguing bill by bill.
Keep rent and utilities as separate splits: it’s common to split rent by room size but utilities evenly.
If a roommate doesn’t pay, am I on the hook?
Possibly. Many leases make every tenant who signs “jointly and severally” liable, which means the landlord can hold any one of you responsible for the full rent, not just your share. Your split is an agreement between roommates, not with the landlord.
Read your lease for that clause, and consider a short written roommate agreement covering the split, due dates and what happens if someone moves out early.
Whose name should the utility bills be in?
Whoever’s name is on an account is the one the company bills and holds responsible, and late payments can follow that person. Spread the accounts around (one person has electric, another has internet) so no single roommate carries all the risk, and settle up on the same day each month.