Free calculator
Split bills by income calculator
When one of you earns much more, 50/50 can feel unfair. Enter each income and the bills you share — rent, groceries, utilities — and see what each person pays when you split in proportion to income.
Shared bills
Incomes
Each person pays
How the income split works
Add up the bills you share each month and enter each person’s income. Take-home pay is the usual choice; what matters is using the same kind of income for everyone. Each person then pays the same percentage of their income: if Alex earns 60% of what the two of you earn together, Alex pays 60% of the bills.
Everything is worked out in whole cents, and the parts always add up to exactly the bills. Next to each part you see what that person would pay at an equal split, so you can see what the choice is actually worth. Nothing you type leaves this page.
When 50/50 works better, and how to talk about it: how to split expenses as a couple
Short answers
Gross or net income?
Net (take-home) income is usually fairer, because it is what each of you actually has to spend. Whichever you pick, use the same kind for everyone.
Is splitting by income fairer than 50/50?
When incomes differ a lot, usually yes: each of you gives up the same share of your pay, so the one who earns less is not left with nothing. When incomes are close, 50/50 is simpler and the difference is small.
What counts as a shared bill?
Usually rent or mortgage, utilities, internet, groceries for the home and shared subscriptions. Personal spending — clothes, hobbies, your own phone — stays out.
Can flatmates use it, not just couples?
Yes, add as many people as you need. Flatmates more often split rent by room size; for that there is the rent split calculator.
Keep the split going, month after month
In kisir you can split each expense by shares — 60/40, or whatever you agreed — and always see the balance between you. Free, no account, on iPhone and Android.
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