Is this child expense split legally binding?
No. This calculator helps with planning and coordination. If you have a court order, parenting plan, or legal agreement, use that as your source of truth.
Free child expense calculator
Split child expenses fairly without the spreadsheet.
Choose a method, add shared costs, and see what each parent pays before you create an account.
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Common questions
Clear math, not legal advice.
Which split method should we use?
Many families use 50/50 for simplicity or income-proportional when incomes are different. Custody-time-weighted can help when one parent covers much more day-to-day time.
What counts as a shared child expense?
Common shared expenses include medical costs, childcare, school fees, activities, clothing, transportation, and insurance.
Can I send this to my co-parent?
Yes. You can copy a share link, download a PDF, export a CSV, or email a copy after the result is created.
Learn more
Use a method both homes can understand.
After the split
Keep expenses, receipts, and balances connected.
CoHaven turns one split into an ongoing shared expense system both homes can review.