home Rent Split Calculator
Work out who pays what for rent and shared bills - evenly, by income, or weighted by room size.
Shares always add up to exactly the total - any rounding remainder goes to the last person, so nobody is left a cent short. Works for utilities, groceries and any other shared cost, not just rent.
Splitting rent sounds simple until the bedrooms are different sizes or the incomes are far apart. This calculator gives you three ways to divide a rent or any shared bill: evenly, in proportion to income, or weighted by room size. It shows each person's dollar amount and their share as a percentage, and the totals always add up exactly - the rounding remainder is assigned rather than left floating, so the household is never a cent short.
How to use this tool
- Enter the totalThe full rent, utility bill or shared cost you are dividing.
- Choose a methodEven, by income, or by room size - whichever your household has agreed on.
- Add everyoneAdd a row per person. Names are optional but make the result easier to share.
- Fill in the numbers your method needsIncomes for an income split, or relative room sizes for a room split. An even split needs neither.
- Copy the resultOne button copies the whole breakdown as text you can paste into a group chat.
Why use it
- Three methods, so you can model the split your household actually wants rather than the one the tool assumes.
- Shares always sum to exactly the total, with rounding handled explicitly.
- Percentages shown alongside dollars, which is what makes an income-based split feel fair.
- Works for any number of people and for any shared cost, not just rent.
Common uses
- Roommates moving into a place with unequal bedrooms.
- Couples with different incomes deciding a fair contribution.
- Housemates dividing utilities, internet or groceries.
- Students splitting a lease near campus.
- Anyone settling a shared holiday rental at the end of a trip.
Tips for better results
- For an income split, use take-home pay rather than gross. It reflects what people can actually spend.
- For a room split, the numbers are relative - entering 2 and 1 simply means one room is worth twice the other. Square footage works well, adjusted for an ensuite or a balcony.
- Agree the method before you sign the lease. Renegotiating a split after moving in is far harder.
- Whoever holds the lease is usually liable for the whole rent regardless of your private arrangement, so keep a written record of what was agreed.
Mistakes to avoid
- Splitting evenly when bedrooms differ substantially in size, which quietly builds resentment.
- Using gross income for an income split, which overstates what a higher earner has available after tax.
- Forgetting to include utilities, parking and internet in the total.
- Letting rounding drift, so the household is repeatedly a few cents short and nobody knows why.
Frequently asked questions
There is no single right answer. An even split is simplest and works when rooms and incomes are similar. An income split keeps the burden equal as a proportion of what each person earns. A room split reflects that a larger or better room is worth more. Most households pick one and stick with it.
Add everyone's incomes, work out each person's percentage of the total, and apply that percentage to the rent. Someone earning 60% of the household income pays 60% of the rent. Select the income method above and it does this for you.
Give each room a relative weight - square footage works well - and the rent divides in proportion. A 200 sq ft room and a 100 sq ft room split two-to-one. Adjust the weights up for an ensuite, more windows or a balcony.
Usually yes, and it is the most common source of roommate friction when they do not. The room method above makes the difference explicit so it can be discussed openly rather than resented quietly.
Yes. Any shared cost works - electricity, internet, water, groceries. Enter the total and split it the same way.
Yes. Dividing $1,000 three ways gives $333.33 each with a cent left over, so the remainder is assigned to the last person rather than dropped. The total allocated is shown so you can confirm it.
As many as you need. Add a row per person; there is no limit.
Take-home is generally the better basis, because it reflects what people can actually spend. Gross income can overstate a higher earner's capacity once their higher tax rate is accounted for.
No. Everything is calculated in your browser. Names and incomes are never uploaded or saved.
Work out their pro-rata share separately: divide the monthly rent by the number of days in the month and multiply by the days they are there, then split the remainder among the others for the rest.
Yes. The copy button puts the whole breakdown on your clipboard as plain text, ready to paste into a message.
Not separately. Deposits are usually split the same way as rent, so you can run the deposit through as its own total using the same method.