How to Split Rent and Bills With Flatmates
Equal split, room-size split, or income-based — the common ways flatmates divide rent and utilities, and how to avoid the arguments that come with getting it wrong.
Equal split
The simplest approach: total rent divided by the number of flatmates, regardless of room size. It works best when the rooms are genuinely similar — otherwise whoever gets the smaller room ends up quietly resentful within a month.
Room-size or attached-bathroom split
When rooms differ noticeably — one has an attached bathroom, one is significantly bigger, one gets more natural light — a weighted split is fairer. A common method: price each room individually so they add up to the total rent, based on size and amenities, then everyone pays their room's price rather than an even share.
Utilities — split separately from rent
Electricity, WiFi, and gas are usually fairer split equally regardless of room size, since everyone uses them roughly the same. Keep a shared expense list (a simple spreadsheet or a splitting app) rather than trusting memory — this is where most flatmate disputes actually start.
Put it in writing on day one
Before anyone moves in, agree in writing (even just a shared note) on: the split method, the due date each month, what happens if someone pays late, and the notice period if someone wants to move out. It feels unnecessary when everyone's getting along — it's exactly what prevents the argument three months later when someone isn't.