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How to split rent fairly

To split rent fairly, pick a method that matches how different the rooms are: equal if they are similar, by room size or features if they are not, or by income for couples. Below, one apartment is worked through all four methods so you can compare.

Updated November 2026

The four common ways to split rent

Most households use one of four methods, or a mix of two:

• Equal. Everyone pays the same. Best when the rooms are about the same.
• By room size. Rent follows bedroom floor area. Best when rooms differ clearly in size.
• Weighted by features. Each room gets points for things like a private bathroom or a balcony. Best when size is not the whole story.
• By income. Each person pays in proportion to what they earn. Common for couples, less so for flatmates.

To compare them, we will use one apartment: three bedrooms, $3,000 a month. Room A is 180 sq ft with a private bathroom. Room B is 140 sq ft with a small balcony. Room C is 120 sq ft and has neither.

Method 1: split rent equally

$3,000 ÷ 3 = $1,000 each. It is simple and nobody has to measure anything. The problem is obvious in our apartment: the person in Room C pays the same as the person with the biggest room and their own bathroom. If the rooms are close to identical, use this. If they are not, it tends to cause friction later.

Method 2: split rent by room size

Add up the bedroom areas: 180 + 140 + 120 = 440 sq ft. Each person pays their room's share of that total.

Pure size-based splits can overstate the difference, because everyone shares the kitchen, living room and bathroom equally. A popular fix is a hybrid: split half the rent equally (for shared space) and half by bedroom size.

The hybrid narrows the gap between the largest and smallest rooms from about $409 to about $205. Many groups find that feels right.

Method 3: weight rooms by features

Size is not everything. A private bathroom is worth a lot more to most people than an extra 20 sq ft. With a points system, every room starts at 10 points and gains points for extras that your group agrees on. Here we give 3 points for a private bathroom and 1 for a balcony:

Each room pays its points ÷ 34 × $3,000. The point values are a judgement call. The trick is to agree them before anyone knows which room they will get, or at least before anyone has strong feelings about it.

Method 4: split rent by income

Some households, especially couples, split rent by income so housing costs take the same percentage of everyone's pay. Suppose the three tenants earn $6,000, $4,500 and $3,000 a month, $13,500 combined:

Everyone pays about 22.2% of their income in rent. This works well for couples and families. Between friends it can feel intrusive, because it requires sharing salaries, and it ignores which room each person gets. Our page on couples expense sharing covers income-based splits for shared costs beyond rent.

Which method is the fairest?

There is no single fair answer, but there is a fair process. The method is fair if everyone understood it and agreed to it before moving in. In practice:

• Rooms about the same: split equally.
• Rooms differ mainly in size: half equal, half by size.
• One room has a big extra (own bathroom, parking spot): weighted points.
• A couple sharing one room in a shared flat: treat the room as one share, or as 1.5 shares if they use more of the shared space. Agree it explicitly.
• Partners with different incomes: by income.

Use the rent split calculator to try each method with your own numbers.

Step by step: agreeing on a rent split

1. Write down the total rent and what it includes. Note whether utilities, parking or furniture are part of the rent, so you split the same thing everyone thinks you are splitting.
2. List what makes each room different. Floor area, private bathroom, balcony, closet space, noise, light. Agree which of these matter to your group.
3. Pick a method. Equal, by room size, weighted by features, or by income. You can also blend them, such as half equal and half by size.
4. Do the maths and check it adds up. The shares must add up to exactly the total rent. Round to the cent and give any leftover cent to one person.
5. Agree it out loud and write it down. Everyone should say yes to the final numbers before the lease starts. Record them where everyone can see them.
6. Track rent and bills in one place. Add the rent each month with an exact split, plus shared bills, and settle the balance regularly.

What about utilities and bills?

Utilities are usually split equally, whatever the rent split. Everyone uses the Wi-Fi and the heating about the same. If one person works from home all day, some households give them a slightly bigger share of electricity. Keep it simple unless the difference is large. If one person runs an AC most nights, see how to split the electricity bill with roommates for a fair base-plus-AC method. Our guide to tracking shared expenses with roommates covers bills in detail.

How to track it in SplitSimple

Create a group for your home and add the rent each month with an exact split, entering each person's agreed amount. You can also use a percentage split if you agreed on percentages. Bills go in with an equal split. The balance shows who owes whom at any point, and Settle up gives the fewest payments to clear it.

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• Rent split calculator
• Flatmate expense tracker
• How to track shared expenses with roommates
• How to split the electricity bill with roommates