How to split nanny share costs fairly

Split nanny share costs by separating shared hours (both families’ care at once) from solo hours (one family only), applying your agreed percentage to shared time only, and reconciling one statement before anyone pays the nanny through payroll.

Shared hours vs solo hours

Shared hours are when the caregiver is providing care that both families benefit from, typically both children are in the share, often at the host home. Solo hours cover only one family’s children, even if the same nanny is working.

You still need a household rule for what you log as shared vs solo: drive time between homes, early drop-off, nap coverage for one child, and similar edge cases. If the Jones household logs solo and the Williams household logs shared for the same block, you will split dollars twice.

Nap coverage is a common trap. If both children are in the house but only one is awake, that is still shared unless you agreed that quiet time for one child is a solo block. Say it out loud before the first sleepy Friday.

Document the rule in plain language and mirror it in NannySplit. The setup guide covers what to decide up front; the host vs guest guide helps when care location drives those calls.

How split math works

Shared math uses your percentage on the shared subtotal only. Solo lines stay with the family that used them.

NannySplit applies the split you configure to shared segments. The planning calculator uses the same idea for what-if estimates; default 50/50 there is a convenience while you try scenarios.

Treat overtime dollars as a separate conversation (see overtime in a share) and agree how OT lines appear on the statement before the week goes long.

When hourly rates differ between families

Some shares use one blended rate for shared time; others keep separate base rates per household and show two wage lines that sum to what the nanny earns. What matters is that both families see the same breakdown before approving.

If Jones pays $25/hour and Williams pays $27/hour for shared segments, document how the statement presents that (separate lines vs weighted average). NannySplit should mirror what you agreed; changing mid-year without telling the nanny guarantees confusion.

Solo hours almost always bill at the using family’s rate. Do not split solo time “for fairness” unless everyone signed up for that explicitly.

Why twin spreadsheets fail

Spreadsheets hide assumptions. One family rounds up while the other rounds down, and pennies become trust issues. Payroll calendars rarely match Sunday-to-Saturday care logs. Overtime gets guessed in two imaginary 40-hour buckets instead of the nanny’s real workweek.

One exported statement both households approve fixes the social problem: you argue about the same rows. NannySplit is built for that reconciliation layer. Keep payroll for taxes. This statement is who owes what for the hours that happened.

Using the free calculator vs signing up

Use the planning calculator when you are negotiating rates or testing split percentages. Sign up and start a share when you are ready to log real periods, invite the other family, and settle from hours that actually happened. The calculator helps you talk; NannySplit helps you close the week.

More background lives on the guides hub and in the nanny share setup overview.

Checklist before you close a period

• Shared and solo hours tagged consistently for every day.
• Split percentage matches what both families signed up for.
• Overtime lines visible and agreed (if total hours crossed your threshold).
• Statement total matches what each household will pay.

When those checks pass, approve the period. NannySplit already answered who owed what for the split.

Worked example with solo and shared in one week

Imagine:

Day	Type	Hours	Notes
Mon–Thu	Shared	8/day	Both kids at host home
Fri	Solo (B)	6	Guest child out sick

Shared subtotal: 32 hours at $24/hour → $768 for shared time. At a 50/50 split, each family owes $384 for shared time.

Williams solo: 6 hours at $26/hour → $156 owed by the Williams household only.

Jones owes $384; Williams owes $384 + $156 = $540 for that week before overtime. Your rates and split will differ. The point is one table both families approve.

If you had agreed 60/40 (Jones/Williams) instead of 50/50, Jones’s share of the $768 would be $460.80 and Williams’s $307.20. Williams still adds the $156 solo line. The percentage only touches shared time. Hosting more days does not change that unless you also changed the percentage.

Mid-year rate changes belong in the next period, not patched into last Tuesday. If Williams’s solo rate goes from $26 to $28 on the first of the month, log the new rate from that day forward so the statement does not mix two prices on one line.