# How to split rent when roommates include a couple

Canonical URL: https://www.evenoutapp.com/guides/how-to-split-rent-with-a-couple
Updated: 2026-10-06

A couple can count as two people, as one room, or as something in between. On a $2,400 two bedroom apartment shared with one single roommate, the couple pays $1,600 per head, $1,200 per room, or $1,440 if each partner counts as 0.75 of a person. Pick the method before anyone signs, and write it down.

Key points:
- There are three ways to count a couple: per head (two people), per room (one tenant), or weighted, with each partner counting less than one.
- On $2,400 with one single roommate, the couple pays $1,600, $1,200 or $1,440, and the single roommate pays $800, $1,200 or $960.
- Costs that grow with use, like electric and water, fit a per head count. A flat internet plan fits per household.
- Before a partner moves in mid lease, agree the start date, whether the rent shifts, a review date and what happens if they leave.

## How do you count a couple when you split rent?

There are three ways, and each is defensible. Say a couple and one single roommate rent a two bedroom apartment for $2,400.

- **Per head.** Count each person once. That is three people at $800, so the couple pays $1,600 and the single roommate pays $800.
- **Per room.** Count each bedroom once. That is two rooms at $1,200, so the couple pays $1,200 and the single roommate pays $1,200.
- **Weighted.** Count each partner as 0.75 of a person. The couple is 1.5 and the single roommate is 1, which makes 2.5 in all. $2,400 ÷ 2.5 = $960 for each whole unit, so the couple pays $1,440 and the single roommate pays $960.

Per head says the rent pays for people: two of them use the kitchen and the bathroom. Per room says the rent pays for the bedroom, and a couple sleeps in one. Weighted says both are partly true. The 0.75 is only an example to agree on, and 0.5 or 0.8 would use the same arithmetic.

## What changes in a bigger apartment?

Say a three bedroom apartment also costs $2,400, with a couple and two single roommates. Now the choice changes what the single roommates pay too: $600 each per head, or $800 each per room.

| Method | Couple pays | Each single pays |
|---|---|---|
| Per head (4 people) | $1,200 | $600 |
| Per room (3 rooms) | $800 | $800 |
| Weighted (0.75 each) | $1,028.57 | $685.71 |

The weighted figures come to $2,399.99, so one single roommate pays the spare cent. With the weights at 1.5, 1 and 1, the unit is $2,400 ÷ 3.5 = $685.71.

## Which method fits your apartment?

Per room fits when the bedrooms are similar and the couple does not use the shared spaces more than anyone else. Per head fits when shared space is a large part of what you are renting, such as small bedrooms and a big living room. Weighted fits when neither feels right and each side wants to give a little.

Whichever you choose, apply it to the whole lease and not month by month. If the couple takes the bigger bedroom, that is a separate premium on top, covered in [how much more the master bedroom should pay](https://www.evenoutapp.com/guides/how-much-more-should-the-master-bedroom-pay). If you split by income, add the couple's incomes and count them as one entry, as in [how to split rent based on income](https://www.evenoutapp.com/guides/how-to-split-rent-based-on-income).

## How do you split utilities and internet with a couple?

Count what grows with use per head, and what is flat per household. Per household treats the couple as one household that pays one share. Say the bills are $150 for electric, gas and water and $60 for internet, with the same couple and single roommate.

| Bill | Per head | Per household |
|---|---|---|
| Utilities, $150 | Couple $100, single $50 | $75 each |
| Internet, $60 | Couple $40, single $20 | $30 each |
| Both, $210 | Couple $140, single $70 | $105 each |

Two people use more water and electricity than one, so utilities fit per head. An internet plan costs the same for one user or two, so it fits per household. Mixing the two puts the couple at $100 + $30 = $130 and the single roommate at $50 + $30 = $80. The mix still adds up to $210.

## Who buys the groceries?

Decide whether food is shared before it comes up. If the couple cooks together and the single roommate cooks alone, keep groceries separate and share only a short staples list. If everyone eats from the same shelf, count the couple as two heads, because two people eat. On $360 of shared staples a month, the couple pays $240 and the single roommate pays $120. The full set of systems is in [how to split groceries with roommates](https://www.evenoutapp.com/guides/how-to-split-groceries-with-roommates).

## What should you agree before a partner moves in mid lease?

Settle these in writing before the move, not after the first bill.

1. **The start date.** Per head costs begin the day the partner starts staying, not the day of the conversation.
2. **The lease.** Read what it says about extra people living in the apartment, and talk to the landlord before the move if it covers this.
3. **Whether the rent shifts.** Say three roommates pay $2,700 at $900 each, and Dev's partner moves into Dev's room. If the weighted count from the first example applies to the whole rent, Dev and the partner count 0.75 each, so Dev's room is 1.5 units and the apartment is 3.5. $2,700 ÷ 3.5 = $771.43 a unit, so the other two pay $771.43 each and Dev's room pays $1,157.14. The other choice is to leave the rent alone and share only the costs that rise with use. Either is fine if it is agreed.
4. **A review date.** Look at the arrangement again after two or three months.
5. **What happens if they leave.** The shares go back to the old split from the day the partner stops staying.

[Should a roommate's partner pay rent or utilities](https://www.evenoutapp.com/guides/should-a-roommates-partner-pay-rent) looks at when a partner who stays over should start sharing costs.

## How do you enter it in EvenOut?

Add the rent as one expense in a Household group. Say the couple is one member of the group and the single roommate is the other. "Split equally" is then per room and gives $1,200 each. For per head, choose "Shares" and type 2 for the couple and 1 for the single roommate, which shows 3 shares at $800 a share. For the 0.75 weighting, type 3 and 2, the same ratio as 1.5 to 1, which shows 5 shares at $480 a share: $1,440 and $960.

If both partners are members, "Split equally" among the three people gives per head, and "Exact amounts" lets you type each partner's half of the couple's total. The pill reads "All assigned" when the amounts match. Set Repeat to Monthly under "Photo, repeat, pending or note" and EvenOut adds each later month with the same payer and split.

## What should you do next?

Pick one method, apply it to rent and bills, and record it in the roommate agreement. The [rent split calculator for a couple](https://www.evenoutapp.com/tools/rent-split-calculator-for-a-couple) runs the three counts on your own rent, and [how to split utilities between roommates](https://www.evenoutapp.com/guides/how-to-split-utilities-between-roommates) covers the bills in more detail.

## Frequently asked questions

### How do you split rent by income when one roommate is a couple?

Add the couple's incomes together and treat them as one earner. On $2,400, with the couple earning $5,000 combined and a single roommate earning $3,000, the total is $8,000. The couple pays $1,500 and the single roommate pays $900.

### What if the couple takes the bigger bedroom?

Add a room premium on top of whichever method you chose. If the group agrees the bigger room is worth $150 a month, per room goes from $1,200 each to $1,350 for the couple and $1,050 for the single roommate. The two amounts still add up to $2,400.

### How should the couple divide their own share?

That is theirs to settle. On a $1,440 share, half each is $720. If they split by income at 60 to 40, it is $864 and $576. The other roommates only need to know the couple's total.