Household budgeting
Allocate the complete monthly rent in proportion to positive incomes, while keeping every displayed share reconciled to the exact rent total.
Income inputs stay on this page
Enter positive monthly or annual income amounts using the same period for every person.
Income values are not added to links, local storage, events, metadata, logs, or requests. The copied summary includes percentages and shares, not entered incomes.
Exact-cent result
The complete rent is reconciled to whole cents using stable remainder ordering.
For a monthly rent of $3,000.00, Alex pays $1,800.00 (60%), Sam pays $1,200.00 (40%). The complete rent is allocated in proportion to the positive income amounts entered and reconciled to whole cents. This is one household-budgeting approach, not a default rule for unrelated roommates and not a legal or financial requirement.
For each participant, calculate entered income divided by total entered income, then multiply that ratio by the monthly rent. RentSplit converts the rent and incomes to integer cents, applies proportional weights, and distributes residual cents deterministically.
Example: with $6,000 and $4,000 of entered monthly income, the percentages are 60% and 40%. A $3,000 rent becomes $1,800 and $1,200.
Income weighting can support partners, family members, or another household that has deliberately chosen to distribute housing cost according to financial capacity. It should be an explicit agreement because it treats personal finances as the allocation basis.
For unrelated roommates who mainly rent rooms of different value, the room-value calculator usually provides a clearer starting point.
Names and income values stay in the controlled form state for the current page session. This route has no share-link action, autosave, device snapshot, analytics event, runtime request, account, database, or external service.
Copying a result writes only the neutral allocation explanation to the browser clipboard after an explicit button press. The copied explanation contains names, percentages, and shares, while raw income amounts are omitted.
Each person's positive income is divided by the total entered income. That percentage is applied to the complete monthly rent, then the shares are reconciled deterministically to whole cents.
No. It is one household-budgeting approach and is often more relevant when people intentionally share finances. Unrelated roommates may prefer a room-value or equal split.
No. This calculator does not place income values in URL fragments, device storage, metadata, generic events, logs, requests, or external services.
No. Every participant must have a positive, finite income using whole-cent precision so the proportional weights are defined.
No. The result applies the entered formula only. It is not legal or financial advice and does not determine affordability or an obligation under a lease.