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How to split expenses with roommates (rent, bills and shared supplies)

By Leandro @ Even · June 12, 2026 · 6 min read

Living together works great until the electricity bill arrives and nobody is sure who paid for the internet last month. A little structure up front saves months of awkward conversations.

Set the ground rules on day one

Before moving in, agree on three things: what is shared, how it's split, and when balances are settled. Write it down — even informally. The moment money is handled by a clear rule instead of a mood, the deposit arrives, the groceries are bought and nobody feels they're carrying the house.

What should you split?

• Rent — equal or by % if bedrooms/bathrooms differ widely.
• Utilities — electricity, water, gas, internet: usually equal, since everyone uses them.
• Shared groceries — staples, cleaning supplies, toilet paper.
• Household items — furniture or appliances bought together should be a clear split with an agreement on ownership.

Personal items (your food, your phone plan) stay out of the shared ledger. That boundary prevents most conflict.

A monthly rhythm avoids pile-ups

Keep a shared group and record expenses when they happen. Then, once a month, settle the balances — whoever overpaid gets the difference, in one transfer. Short cycles mean nobody fronts the whole household for months.

Handling the one who pays for everything

Often one roommate holds the lease, pays the bills and goes to the supermarket. That's a lot of floating money. Recording every expense in a shared ledger turns that invisible debt into clear numbers, so the "main payer" gets repaid reliably at the end of the month without asking.

Make it effortless with a shared ledger

Spreadsheets work, but everyone has to edit them and someone has to reconcile the totals. An expense-sharing app keeps a single synchronized record every roommate can see, handles the division by %, shares or unequal parts, and works out who owes whom. No manual math, no resentment.