Rent Split Calculator

By income spreads cost according to ability to pay, while even is the simplest. Many households combine both ideas, sometimes with room-size adjustments.

Each roommate pays the total rent times their income divided by the sum of all incomes, so higher earners pay a proportionally larger share.

This tool does not weight by room size. To account for that, assign a price to each room first, then split any shared space among everyone.

Add utilities to the rent total if you want one combined split, or run the utilities through separately using the same method.

It depends on what the roommates agree to. Splitting by income is fair from an ability-to-pay standpoint, especially when there is a big gap in earnings. But if everyone shares similar amenities and the rooms are equivalent, an even split is just as valid and simpler to manage.

In most cases, every roommate who signs the lease is jointly responsible to the landlord: if one does not pay, the others have to cover it. That is why it helps to talk openly about financial expectations before signing and to consider a written agreement between the roommates.

The security deposit is an upfront cost separate from the monthly rent. It is usually split evenly among the roommates or proportionally by income, following the same method you chose for the rent. Document who contributed what so the refund is easy to sort out when the lease ends.