Split Bills Based on Income Calculator
Enter each person's monthly take-home pay and the bills you share to compare two ways to divide the total.
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Your monthly numbers
Use take-home income for the same month. Amounts are in US dollars.
Shared monthly bills
Your inputs stay in this page. Refreshing clears them.
About the split bills based on income calculator
An income-based split divides shared expenses in proportion to each person's take-home pay. If one person brings in 60% of the combined income, that person pays 60% of the shared bill total.
Fairness can also include caregiving, debt payments, disability, personal needs and unpaid work. Use the calculation as a starting point for an agreement both people can choose freely.
How it works
Add take-home income
Enter what each person receives after taxes for the same month. Zero is okay for one person.
List shared bills
Include only expenses you have agreed to share, such as rent, utilities or groceries.
Compare the shares
See each person's proportional amount and the amount they would pay if you split the total equally.
Ways couples use this tool
Different incomes
See how a proportional contribution changes the amount each person pays.
A monthly check-in
Revisit the split when pay, work hours or shared expenses change.
Things to keep in mind
- Use the same pay period for both incomes.
- Include only expenses both people consider shared.
- Review the arrangement when circumstances change.
Frequently asked questions
How is each person's share calculated?
Each person's income is divided by combined income. That percentage is applied to the total shared bills; the second amount is adjusted by a cent if needed so both shares add up exactly.
Can one person have no income?
Yes. One person's income can be zero, but the combined income must be greater than zero to calculate a percentage.
Is an income-based split always fair?
Not necessarily. A fair agreement can also account for unpaid work, debt, access to money, individual needs and preferences.