Free tool
Expense Split Calculator
Add shared kid expenses, pick a split method, and see exactly who owes whom, down to the cent.
Total shared expenses
$205.00
Parent B owes Parent A
$17.50
How the math works
Even split vs. income-based split
Even (50/50)
Every expense is split down the middle regardless of who paid it. If Parent A paid $200 total and the fair share is $100 each, Parent B owes Parent A $100.
By income (pro rata)
Each parent's share is proportional to their income. If Parent A earns twice what Parent B does, Parent A's fair share of any expense is about two-thirds, not half.
FAQ
Questions, answered
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