Roommate Rent & Bills Splitter
Split rent by bedroom size, decide how much of it covers shared space, share bills evenly, and see what each person pays.
Everyone uses the kitchen and living room equally. Set how much of the rent covers those shared areas; that part is split evenly and the rest by room size. 0% splits all rent by room size, 100% splits it evenly.
An extra amount on top of the bills, split evenly, so there's money set aside when a bill comes in higher than usual. Set it to 0% if your group doesn't want one.
Roommates and room sizes
What each person pays per month
| Roommate | Share of rent | Rent | Bills | Cushion | Total |
|---|---|---|---|---|---|
| Roommate 1 | 40.9% | $818.18 | $70.00 | $3.50 | $891.68 |
| Roommate 2 | 31.8% | $636.36 | $70.00 | $3.50 | $709.86 |
| Roommate 3 | 27.3% | $545.45 | $70.00 | $3.50 | $618.95 |
Payment gap
$272.73
The highest payer pays $272.73 more per month than the lowest payer (44% more). Over a 12-month lease that is $3,273.
If the gap feels too large or too small for the difference in rooms, adjust the shared-space slider until everyone agrees, then write the numbers down.
Guide: Splitting rent and bills fairly
Why an even split often isn't fair
Splitting rent evenly is simple, but if one bedroom is much bigger than another, or has its own bathroom, the person in the smaller room is paying for space they don't get. Weighting rent by room size fixes that.
Weighting all of the rent by bedroom size goes too far the other way, because everyone shares the kitchen, living room and hallways equally. A middle ground is to split the part of the rent that covers shared space evenly and weight only the rest. There's no single correct percentage, so try a few values above and agree on one together before anyone signs the lease.
Bills: whose name is on the account matters
Utility and internet accounts are usually in one person's name. That person is responsible to the provider if a bill goes unpaid, and an unpaid bill that goes to collections can end up on their credit report. Agree on a date each month when everyone pays their share to the account holder, ideally before the bill is due.
Bills like heating and electricity change with the seasons. A small shared cushion, collected each month and kept aside, covers a higher-than-usual bill without anyone having to chase money. If you use one, agree on what happens to any leftover amount when someone moves out.