How to Split Rent With Roommates Fairly

Method 1: Equal Split

The simplest approach is to divide the total rent equally among all roommates. This works well when all bedrooms are roughly the same size and all roommates have similar financial situations.

Example: A three-bedroom apartment renting for $2,400 per month splits to $800 per person.

The advantage of an equal split is that it is completely transparent and requires no ongoing negotiation. The disadvantage is that it can feel unfair if rooms are significantly different in size or quality.

Method 2: Proportional Split Based on Room Size

If bedrooms are different sizes, a proportional split based on square footage is more equitable. Measure each bedroom and calculate each person's share as a percentage of the total bedroom square footage.

Example: Three bedrooms of 120, 100, and 80 square feet (300 total). The person in the largest room pays 40% of rent, the middle room pays 33%, and the smallest room pays 27%.

You can also factor in other differences like a private bathroom, a larger closet, or better natural light. Agree on these adjustments before moving in.

Method 3: Income-Based Split

Some roommates choose to split rent proportionally based on income, so that each person pays a similar percentage of their earnings rather than the same dollar amount. This approach is more common among close friends who are comfortable sharing financial information.

It requires a high level of trust and transparency, and it needs to be revisited if anyone's income changes significantly during the lease.

How to Split Utilities

Utilities are usually split equally unless one person uses significantly more than others. The simplest approach is to add utilities to the monthly rent calculation and split the total.

• Electricity and gas: Split equally unless one person works from home and uses significantly more power
• Internet: Split equally since everyone benefits
• Water: Usually included in rent, but if not, split equally
• Streaming services and subscriptions: Decide upfront whether these are shared or individual expenses

Managing Shared Household Expenses

Beyond rent and utilities, shared expenses like cleaning supplies, toilet paper, dish soap, and shared food can create friction if not handled systematically.

• Create a shared household fund: Each person contributes a fixed amount monthly (typically $20 to $40) into a shared account or cash envelope for household supplies
• Use a shared expense app: Splitwise is free and widely used among college students. It tracks who paid for what and calculates who owes whom at any given time.
• Settle up monthly rather than tracking every small transaction. This reduces friction and keeps the accounting simple.

Put Everything in Writing

Verbal agreements are easy to misremember. A written roommate agreement that everyone has signed prevents disputes about what was originally agreed.

• Document each person's monthly rent amount
• Specify how utilities are split and who is responsible for paying each bill
• Agree on what happens if someone cannot pay their share one month
• Clarify what happens if someone wants to leave before the lease ends