Split child expenses by your income ratio
Daycare, medical, school and activities split 60/40, 70/30 or 50/50 — with what-ifs if the ratio moved by 5 or 10 points.
Many support orders and parenting plans split extra child costs in proportion to income. Kidtally applies your ratio to every shared expense, shows each parent's share per category, and shows what the balance would be at 50/50 or with the ratio moved by 5 or 10 points — handy when incomes change.
Load one row per expense: which parent paid, the amount and who shares it — all splits it by your agreed ratio (Maria:60; Sam:40), Maria; Sam makes that row 50/50, and a single other name records a payment or reimbursement between you. Add an optional category (Childcare, Medical, School…) to get totals per category. Each share is split in whole cents, so both balances net to exactly zero.
Worked example
The sample is fictional: co-parents Maria and Sam, two kids, January–June 2026, with an agreed ratio of Maria 60% / Sam 40%. 16 rows — daycare, the dentist, soccer, camp, piano, school costs, an insurance payback and one $1,500 payment from Sam to Maria. Shared child expenses come to $7,501.45. After the payment, Sam still owes Maria $600.37. At 50/50 instead it would be $1,337.67.
Your expenses stay on your computer
Kidtally reads your file with JavaScript in this browser tab. Names and amounts are never uploaded and nothing is saved — close the tab and it's gone. Neither parent needs an account.
How it works
- List the kid costs — who paid, amount and who shares it — in the template, or try the sample.
- Enter your agreed ratio, or use 50/50.
- Share the statement: each parent's share and the amount still owed.
FAQ
Is my data uploaded?
No. Your files are read by JavaScript in your browser tab and never sent to us or anyone else. Expenses aren't stored, so closing the tab clears them. The currency, ratio and split can be saved in this browser if you ask; the statement name never is.
Where does the ratio come from?
Usually your parenting plan, separation agreement or support order — often each parent's share of combined income (for example $60,000 and $40,000 gives 60/40). Kidtally doesn't work out what you're required to pay; it applies the ratio you enter.
How do I write the split?
all (or blank) splits the row by your agreed ratio. Maria; Sam makes that row 50/50, and Maria:3; Sam:1 is a custom split. A single name other than the payer records a payment between you, like Sam paying Maria back.
How are reimbursements and insurance handled?
When one parent pays the other, enter a row paid by them with only the other parent in the split — it counts as a payment, not a shared cost. When insurance or a school pays something back, enter it as a negative amount on the row of the parent who got the money.
How are the cents handled?
Each share is worked out by rounding down and giving the leftover cents to the largest remainders, so shares always add up exactly to the expense and both balances net to zero.
How is this different from OurFamilyWizard?
OurFamilyWizard is a full co-parenting platform with messaging, calendars and an expense log, and its plans are priced per parent. Kidtally only does the expense maths from a list you already have, one parent can run it, and nothing is uploaded. If a court requires a specific app, use that.
What's free?
Both balances, the amount owed, every flag, 3 what-ifs and 12 expenses on screen and in print (with a footer). Pro shows every expense and every what-if and adds a statement for each parent, the Excel workbook and CSV exports.
Is this legal or financial advice?
No. Kidtally does the arithmetic on the expenses and ratio you enter. Your order or agreement decides which expenses are shared.