One parking spot, one driver
A parking space is a separate thing of value bundled into the rent. Put a monthly number on it, charge it to whoever uses it, and split the remaining rent normally.
Kitchen, living room, shared bath. The rest of the rent follows each room.
Closet, light, noise
Closet, light, noise
Weights you agree on
The link holds the whole split. Nothing is stored on our server until you make it a household.
The working, room by room
| Room | People | Weight | Shared part | Room part | Extras | Pays |
|---|---|---|---|---|---|---|
| Driver | 1 | 140 × 1 | $475.00 | $725.45 | $125.00 | $1,325.45 |
| No car | 1 | 135 × 1 | $475.00 | $699.55 | $0.00 | $1,174.55 |
| Total | 2 | $950.00 | $1,425.00 | $125.00 | $2,500.00 |
Weight = floor area × the room’s multiplier (private bath and factors). Unrounded parts are shown; the “Pays” column is rounded to cents so it adds up exactly.
The numbers, step by step
Two roommates rent a $2,500 two-bedroom that comes with one parking space. Only one of them has a car. They agree the space is worth about $125 a month (a figure they chose by looking at what nearby spaces rent for), so that amount is charged to the driver and the remaining $2,375 is split by the usual formula.
- Driver pays $1,325.45: 1.02× average floor area, parking spot ($125).
- No car pays $1,174.55: 0.98× average floor area.
- Total: $2,500.00, exactly the rent.
Names and amounts are samples. Change any number in the calculator above and the result updates.
A fairness test you can run together
Fair-division research calls a split envy-free when each person feels they got the best piece “in her own estimation”, as Francis Su puts it. Ask: at these prices, would anyone rather swap rooms? If not, nobody envies anyone. Bid mode makes that a guarantee.
Keep it running
Turn this into a household: rent posts at the agreed split each month, bills split by days home, and housr works out who owes whom. Roommates join with a link and a name.
Make it a householdWhen this split is fair, and when it isn’t
Fair when
- The value is grounded in something outside the household, such as what a comparable space rents for nearby, rather than in who argues hardest.
- If the non-driver later gets a car, the same rule tells you how to share or rotate the space.
- The driver’s room is split on the same terms as everyone else’s; only the parking is extra.
Not so fair when
- If the space can’t be rented separately and has no market value where you live, charging much for it is arbitrary; a token amount or nothing may be fairer.
- If the landlord itemises parking in the lease at a stated price, use that price instead of a guess; the lease is the document your landlord goes by.
- If the space is a guest spot everyone uses for visitors, it is shared space, not one person’s.
This is general information about splitting costs between yourselves, not legal advice. Your lease and your state’s law decide what you owe the landlord.
Sources
- Spliddit, Assign Rooms and Share Rent. Checked 2026-10-05.
- Gal, Mash, Procaccia and Zick, Which Is the Fairest (Rent Division) of Them All? (J. ACM 64(6), 2017). Checked 2026-10-05.
- Office of the Texas Attorney General, Renter’s Rights. Checked 2026-10-05.
Related situations
One room is furnished, the others aren’t
Furniture saves the person who gets it real money. Treat it like parking: a monthly value carved out of the rent and charged to that room.
Open the example Split rentHow much more should the master bedroom pay?
A private bathroom and roughly twice the floor area are worth something to whoever gets them. Price both openly, so nobody quietly subsidises the bigger room.
Open the example Split rentOne roommate pays the landlord. Who sends them what?
Many landlords take one payment. Whoever sends it is fronting money for everyone, so make the amounts exact and the record shared.
Open the example