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When somebody moves out mid-month
Two separate sums, and they get muddled constantly. The leaver owes their normal share for the days they were there — their monthly share divided by the days in the month, times the days lived. Everything after that is a fresh split between whoever remains, recalculated from scratch rather than by adding the empty room's share onto the others.
50% of the rent
50% of the rent
Opens on these exact numbers for whoever you send it to.
The household as it is from next month — the people who remain, splitting the whole rent. Work the leaver's final days out separately.
Prorating the last month
Take the share the leaver was already paying, divide by the number of days in that month, and multiply by the days they actually lived there. A $800 share in a 30-day month is $26.67 a day; leaving on the 12th means $320.
Do it on their existing share rather than on a recalculated one. They were living there under the old arrangement, and changing the basis retroactively is how a straightforward sum turns into an argument.
Recalculate rather than absorb
The instinct is to divide the empty room's share between whoever is left. It gets the right total and the wrong shares: the arrangement was built around a household that no longer exists, and quietly carrying it forward means somebody is now paying a proportion nobody ever agreed to.
Start again. Same rent, the people who are actually there, whichever basis you use. If a new person is arriving, do it again when they do — grandfathering somebody into an old split is the same mistake with a longer fuse.
The deposit is not this sum
It is the thing that turns a tidy departure into a bad one. The deposit is usually held against the tenancy rather than against a person, so somebody leaving mid-lease is normally paid out by whoever remains or by their replacement, not by the landlord. Agree who is handing that money over before the last box goes in the van, and check the tenancy agreement — this part is genuinely legal and varies by where you live.
Questions people ask
- How do you prorate rent when a roommate moves out mid-month?
- Divide the share they were already paying by the number of days in that month, then multiply by the days they lived there. Use their existing share, not a recalculated one — they were there under the old arrangement.
- Should the remaining roommates just absorb the empty room's share?
- It reaches the right total and the wrong shares. Recalculate the split from scratch for the household that actually exists now, otherwise somebody ends up paying a proportion nobody agreed to.
- Who pays back the deposit when one roommate leaves?
- A deposit is usually held against the tenancy rather than against a person, so a leaver is normally paid out by the remaining housemates or by their replacement rather than by the landlord. Check the tenancy agreement — this part is legal and varies by location.
Other ways to split it
- Splitting rent by room sizeWork out each room's share of the rent by square footage, then adjust for the ensuite. Free calculator, no account, and a link you can send to the house.
- Splitting rent three waysThree people, one rent, and a number that rarely divides cleanly. Even, by income or by room size, with the leftover cents handled. No account needed.
- Splitting rent by what each of you earnsAdd both take-home figures, work out each share, apply it to the rent. Shows the percentage of each salary beside each amount. Free, no account.
Agreeing it once is the easy half
Applying it to the rent, the power, the internet and the four subscriptions, every month, is the half that needs help. Pairly holds the split and does that part — no bank connection, no card to start.