How to Split Expenses With Roommates Fairly

Money is one of the most common sources of tension between roommates and couples. The good news is that most arguments can be avoided with a clear agreement up front and a simple way to track who paid for what.

Three fair ways to split rent

1. Split evenly

Everyone pays the same share. This is simplest and works well when bedrooms are similar in size and everyone shares common spaces equally.

2. Split by room size or features

If one bedroom is larger, has a private bathroom, or includes a parking space, that person pays more. One approach: split half of the rent evenly (for shared spaces) and divide the other half by each bedroom's square footage.

For example, with $2,400 rent and two roommates, $1,200 is split evenly ($600 each). If bedroom A is 180 sq ft and bedroom B is 120 sq ft, bedroom A covers 60% of the remaining $1,200 ($720) and bedroom B covers 40% ($480). Total: $1,320 and $1,080.

3. Split by income

Common for couples: each person pays a share proportional to their income. If one partner earns $60,000 and the other $40,000, they might split shared costs 60/40.

Utilities and groceries

• Utilities (electricity, internet, water) are usually split evenly. If one person works from home and runs the AC all day, consider adjusting.
• Groceries: decide whether you'll share staples (oil, spices, cleaning supplies) and buy personal food separately, or pool everything.
• Streaming and subscriptions: only split the ones everyone uses.

Put it in writing

A short roommate agreement covering rent shares, bill due dates, how shared purchases work, and what happens if someone moves out early prevents misunderstandings later. It doesn't need to be formal — a shared note everyone agrees to is enough.

Track expenses as they happen

The biggest source of conflict is usually not the split itself but losing track of who paid for what. Record every shared expense as it happens, then settle up on a regular schedule, such as monthly. Instead of everyone paying everyone back, calculate net balances so the fewest payments clear all debts.

Our free Split Expenses tool does this for you: create a group, share the link with your roommates, add expenses as they happen, and see exactly who owes whom.

Tips for keeping the peace

• Agree on the rules before the first bill arrives.
• Settle up on a regular schedule rather than letting balances grow.
• Keep receipts or photos for larger shared purchases.
• Talk early if someone is having trouble paying their share.
• Fit your share into your own monthly budget.