Co-Parenting Cost Splitter
Child costs split by an agreed ratio and itemised, so the same argument is not had again every month.
Splitting shared child costs by income share rather than equally shifts about 1% of the annual total per percentage point of income difference — roughly £210 a year on £3,540 of shared costs, which is why the itemised list matters more than the basis.
Co-Parenting Cost Splitter
Frequently asked
Should costs be split equally or by income?
Both are used and both are defensible. Income-share splits are more common where incomes differ sharply, and courts in several countries use an income-based formula for maintenance. What matters more in practice is that the basis is written down once rather than renegotiated per purchase.
What counts as a shared cost?
The usual line is that shared costs are the ones the child needs regardless of which house they are in — school, health, activities, clothing — while day-to-day food and household bills sit with whoever the child is with. Disagreements almost always concentrate on activities and technology, so name those explicitly.
Does this replace child maintenance?
No. Statutory maintenance is calculated by a government formula in most countries and is separate from a private agreement about extras. Treat this as the layer on top, not as a substitute.
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