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How to Split Utilities and Rent Costs with Roommates

What to split equally, what to split by meter, and how to stop recalculating it every month.

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Sharing a flat means a monthly puzzle: rent, electricity, water, internet, and the running tab of "I bought the dish soap again." Do it by memory and someone always feels they overpay. The fix is a simple rulebook plus one shared record — set it up once and the monthly argument disappears.

Short answer: each type of cost gets its own rule. Anything metered — water, electricity, gas — goes per head, rent goes by room area, and flat charges like internet are split evenly. Write the agreement down rather than trusting five memories.

Decide the principle for each cost type

CostFair way to split
RentEqually, or by room size if rooms differ a lot
Internet, waste, fixed feesEqually — everyone uses them the same
Metered utilities (power, water, gas)By number of occupants; adjust if someone's away for weeks
Shared household goodsEqually — track who bought what so it evens out
Personal food, deliveriesNot shared at all

The trap: fixed vs variable

Rent is the easy part — it's the same every month. The friction is the variable stuff: the utility bill that swings with the season, and the constant small purchases (soap, filters, light bulbs) that one person keeps fronting. Those are exactly the costs memory gets wrong, and exactly why a written record matters.

One record beats five memories

Instead of monthly "who owes what," keep a running group where every bill and household purchase is logged. At any moment each roommate can see their balance, and settling up is one transfer — the same balance method that powers any expense tracker. It's the household version of a shared budget with roommates.

Doing it in DeliBabki

  1. Create a group "Flat on Lenina" and add all roommates.
  2. Log rent and fixed bills as equal-split expenses.
  3. Log the utility bill each month, split by occupants.
  4. Add household purchases as they happen, marking who paid.
  5. Settle up monthly — the app shows the minimal transfers.

Frequently asked questions

What's split equally vs by meter?

Rent and fixed fees equally or by room; metered utilities by occupants; personal not shared.

How do we avoid arguing every month?

One running shared record — log bills and purchases, settle up in one transfer.

End the monthly recalculation

One shared group for the flat. Log bills, see balances, settle up. Free.

Create Free Group 🚀