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Care arrangements are usually counted in overnight stays, because nights rather than daytime contact drive both the practical routine and, in many jurisdictions, child maintenance bands. Routine nights across term time plus allocated holiday nights give the annual total.
Routine nights
Routine = Nights per fortnight x (Weeks in the routine / 2)
Annual total
Total nights = Routine nights + Holiday nights
Indicative estimate only. Fees, entitlements, limits and formulas vary by jurisdiction, statute, policy wording and the facts of the case. This is not legal, tax, insurance or financial advice — confirm with a qualified professional or the relevant authority.
Because overnight care is objectively verifiable and is the metric most maintenance formulas and court orders use.
In many systems shared care reduces or eliminates the maintenance liability once nights pass a threshold. The thresholds vary considerably.