On this page
  1. Option 1: Split rent 50/50
  2. Option 2: Split rent in proportion to income
  3. Option 3: Split by space or use
  4. How to choose the right split
  5. Don't forget the other housing costs
  6. Keep track without spreadsheets
  7. The bottom line

Rent is usually the biggest bill a couple shares, so it is also the one most likely to feel unfair. There is no single right answer: the best split is the one you both agree on and can explain in one sentence. Here are the three common methods, how to calculate each one, and how to choose.

Option 1: Split rent 50/50

Each partner pays half. If rent is $1,800 a month, you each pay $900.

Works well when you earn roughly the same, or when you both want a simple rule that never needs recalculating.

Watch out when one partner earns much more. Paying the same amount can take a much bigger share of the lower earner's income and leave them with little for savings or personal spending.

Option 2: Split rent in proportion to income

Each partner pays the same percentage of their income instead of the same amount.

  1. Add your monthly take-home pay together.
  2. Divide each income by the total to get each person's share.
  3. Multiply the rent by each share.

Example: Sam takes home $4,000 and Alex takes home $2,000, so the total is $6,000. Sam's share is 4,000 ÷ 6,000 = 67%, and Alex's is 33%. On $1,800 rent, Sam pays $1,200 and Alex pays $600. Both are paying 30% of their income.

Works well when incomes differ and you want both of you to feel the same pressure from the bill. For a deeper walk-through with other shared bills, see how to split bills fairly when you earn different amounts.

Use take-home pay (after tax), not salary. It reflects what each of you can actually spend.

Option 3: Split by space or use

Sometimes one partner uses more of the home: a dedicated office, the larger bedroom, or a room for a hobby. You can adjust the split to reflect that, for example 55/45 instead of 50/50.

Works well when the difference in use is clear and lasting. Keep it simple: agree on one adjustment rather than measuring square metres every month.

How to choose the right split

Ask yourselves three questions:

  • Does the split leave both of us room to save? If one partner has nothing left after rent, the split may need to change.
  • Can we each explain the rule in one sentence? Simple rules cause fewer arguments later.
  • When will we review it? Agree to revisit the split when either income changes, or once a year.

If the conversation itself feels awkward, these tips on how to talk to your partner about money can help you start it.

Don't forget the other housing costs

Rent is only part of the picture. Decide up front how you will share:

  • the security deposit, and who gets it back if one of you moves out
  • utilities, internet and renters' insurance
  • furniture and one-off household purchases

If you are moving in together soon, our moving-in-together finances checklist covers each of these step by step.

Keep track without spreadsheets

Whichever method you choose, write it down and track who paid what each month, so nobody has to remember. Mutual Save & Split lets you set an income-based split once and applies it to rent and every other shared expense, with both of you seeing updates in real time.

The bottom line

A 50/50 split is simple, an income-based split is often fairer when earnings differ, and a space-based adjustment handles unequal use. Pick the method you can both explain, review it when your situation changes, and track it so the rule stays clear.

Written by Yassine, CEO of Mutual APP

Hey guys im the CEO of Mutual save and split i hope you install the app and give it a chance to try it