Equal split formula
The simplest roommate split adds rent and shared utilities, then divides by the number of people paying. That gives an equal monthly estimate before individual subscriptions, parking, pets, or one-off purchases.
When an equal split may not fit
Bedrooms can differ in size, one person may have parking, or one roommate may cover more utilities. In those cases, use this equal split as the starting point, then adjust the agreement in writing before signing a lease.
Use the split in the rent calculator
After finding the per-person rent, put that number into the homepage calculator as the rent you are checking. This keeps income, debt, savings, and move-in cash in the same estimate.
Three ways to split a shared home
Equal split: divide every shared cost by the number of people. Income-proportional split: assign each person's share according to their share of combined take-home pay. Room-value split: agree on premiums for a larger room, private bathroom, parking space, or shared bedroom, then divide the remaining rent.
Keep personal charges separate. A pet fee, private parking space, or individual subscription should usually stay with the person who uses it unless everyone agrees otherwise.
Split upfront costs separately
Deposits and application fees may not divide like monthly rent. Record who paid each amount, whether it is refundable, whose name appears on the receipt, and how any refund will be distributed after move-out. Put the agreement in writing before money changes hands.
Run a roommate-loss stress test
Calculate both the normal share and the amount each remaining person would owe if one roommate stopped paying for one month. That second number helps size an emergency buffer and reveals whether the lease depends on every payment arriving exactly on time.