Financial Calculator

Proportional Expense Splitter

Calculate a fair, income-based split of your shared household expenses. Ditch the 50/50 and find your proportional contribution.

Income & Expenses
Enter both incomes and your shared household bills.

Partner 1 Income

$80,000
$

Partner 2 Income

$120,000
$

Shared Expenses (Monthly)

$
$
$
Total Shared:$3,600
The Proportional Split
How much each partner needs to contribute to the "Ours" joint checking account every month to cover the shared bills fairly.
Total Monthly Shared Bills
$3,600

Contribution Breakdown

Partner 140%
$1,440 /mo
Partner 260%
$2,160 /mo

Fairness Check: Both partners contribute an identical share of their overall personal income towards the household. It feels mathematically equal.

How is this calculated?

This calculator uses the Proportional Split method. It ensures that both partners contribute the exact same percentage of their personal income towards shared household bills, leaving both with fair discretionary income regardless of wage differences.

The "Fair" vs. "Equal" Dilemma

If there is a significant income gap, a strict 50/50 split of expenses leaves the lower earner financially strained while the higher earner builds individual wealth. A proportional split levels the playing field.

The "Ours" Account

This math works best with the "Yours, Mine, and Ours" hybrid approach. You both transfer your calculated share into a joint account for bills, keeping the rest of your income private for guilt-free spending.