What shared expenses means
Shared expenses are the child-related costs that parents divide between their two households: uncovered medical and dental bills, school fees, childcare, extracurricular activities, and similar items. They are usually split in proportions set by the court order or the parents' agreement, sometimes evenly and sometimes by income.
Shared expenses are distinct from child support, which is a separate periodic payment set by formula. Keeping the two clearly apart avoids a common and draining dispute where one parent tries to treat support as covering costs that the order actually assigns separately.
The practical challenge is proof, so treat shared expenses as a ledger: each cost dated, categorized, and backed by a receipt, with each parent's share noted. That turns settling up from a recurring conflict into a straightforward reconciliation.
Example: logging a $95 school trip fee, tagging it as a school expense, attaching the receipt, and noting the agreed split gives both parents the same clear picture and removes the room for later disagreement.