Spendthrift Spendthrift

How to split rent with roommates, three fair ways.

Equal by headcount is the simplest method and often the wrong one, because rooms are rarely identical. Here are three real ways households actually do it, and a calculator for whichever one you pick.

Three methods, and when each is fair.

  1. Equal, by headcount

    Total rent divided by the number of people. Fair when the rooms are genuinely similar, or when the household would rather not weigh anything.

  2. Weighted by room

    Each room gets a weight, its size in square feet, or a simple score everyone agrees on, and rent follows that weight exactly. Fair when rooms differ in size, light or a private bathroom.

  3. Weighted by income

    Each person's share follows their income instead of their room, so a bill costs a similar effort rather than the same rupee amount. See splitting bills by income for that calculator.

The bigger room pays for the bigger room.

Splitting rent by size

The rule is stored on the bill, so the conversation happens once rather than every month.

THE SAME RENT, SPLIT BY ROOM SIZE ₹42,000 a month, 420 square feet of bedroom Priya 180 sq ft ₹18,000 Rohan 140 sq ft ₹14,000 Meera 100 sq ft ₹10,000 The box is the room. The rent under it is what that room costs. Underneath, it is the share split the app already does, with the rule stored on the bill.

The bigger room pays for the bigger room.

The bigger room pays for the bigger room, and the rule is stored on the bill, so the conversation happens once rather than every month.

FOUR ROOMS, ONE RENT, ONE RATE 540 SQUARE FEET, ₹43,200 A MONTH, SO ₹80 A SQUARE FOOT Asha 180 sq ft ₹14,400 180 Vikram 150 sq ft ₹12,000 150 Meera 120 sq ft ₹9,600 120 Dev 90 sq ft ₹7,200 90 One rate, applied to what each person actually has. The four shares add to the rent.

Four rooms, one rent, one rate.

540 square feet at one rate a square foot. Each room pays for what it actually is.

WHEN SQUARE FEET IS NOT THE FAIR MEASURE AGREED SCORE PAYS Asha Balcony, own bathroom 10 of 10 ₹13,500 Vikram Quiet, no balcony 9 of 10 ₹12,150 Meera Faces the road 7 of 10 ₹9,450 Dev Smallest, shares a wall 6 of 10 ₹8,100 32 points, ₹43,200 ₹43,200 The four of you decide the scores. The app only does the arithmetic that follows.

When square feet is not the fair measure.

A balcony, a shared wall, a room facing the road. Score the rooms out of ten between you and the rent follows the scores.

Talking about it before the numbers go in.

The arithmetic is the mechanical part. The harder part is agreeing on the weight, a room's size, whether a private bathroom counts, whose income counts and how. Decide that as a conversation first, then enter the agreed weights, because a calculator can only be as fair as the numbers it is given. More elaborate rent-splitting tools exist, asking about individual preferences and amenities to find an envy-free split; this one is deliberately simpler, agree on a weight, enter it, done.

Questions.

Which method should we actually use

Whichever the household will actually agree is fair and stick to. Equal is simplest, weighted by room accounts for real differences between rooms, and weighted by income accounts for real differences in what a rupee costs each person.

What if we cannot agree on the weights

Size in square feet is the most objective starting point for a room weight. For income, a rounded monthly take-home figure is usually enough, the calculator only needs the proportion between people.

Can this split utilities too

Yes, run it again with the same rooms and a different total. For a whole month of shared expenses in one place, see split expenses.

See the split rent app for this calculator on its own page, splitting bills by income for the income method, or group expenses for a whole trip or flat's worth of bills at once.