Child Expense Split Calculator
Enter what each parent earns and we'll show a fair, income-proportional split of your kids' costs — or keep it 50/50. Then see each parent's exact share of any expense.
Stop doing this math by hand
CoParent Connect applies your agreed split automatically to every expense, gets your co-parent's approval, and settles balances bank-to-bank — so you never calculate or chase a reimbursement again.
How an income-proportional split works
A 50/50 split is simple, but when parents earn very different amounts it can feel lopsided. An income-proportional split divides each cost in the same ratio as the parents' incomes. If Parent A earns $60,000 and Parent B earns $40,000, A covers 60% and B covers 40% — so each contributes an equal share of their means, not an equal number of dollars.
Which split should co-parents use?
There's no universal right answer — it depends on your incomes, your custody arrangement, and any court order. Many families use 50/50 for everyday costs and an income-proportional split for big-ticket items. The most important thing is to agree on the method once, in writing, and apply it consistently so every expense isn't a fresh negotiation.