Childcare Is a 5-Year Decision That Reshapes the Next 30

The honest cost of one parent staying home

The headline 'I save $30K of daycare' misses two huge numbers: the foregone income (often $80K–$300K/yr after taxes), and the long-term comp penalty for a 5-year career gap (typically 10–25% lower lifetime earnings even after re-entry).

That doesn't mean staying home is wrong — for many families it's clearly the right call. It means the real comparison is rarely 'daycare cost vs $0,' and a real model will surface the actual lifetime number.

• Account for foregone retirement contributions + employer match
• Career re-entry math: comp penalty + skills decay
• Tax credits + DCFSA can shift daycare math meaningfully

Nanny share, au pair, and hybrid options

Nanny share can deliver near-nanny coverage at near-daycare cost; au pair is a strong fit for households with a guest room and flexible schedules. Hybrid models (3 days daycare + 2 days grandparent) are common and often the sweet spot.

What changes when the youngest hits kindergarten

Childcare costs typically drop 60–80% the moment the youngest enters public school. Households that planned for that cliff use the freed cash flow to accelerate retirement contributions, pay down debt, or fund a sabbatical.

How PeakWorth models a childcare path

Each path — daycare, nanny, or a stay-at-home year — is modeled with its foregone income (net of the federal + state taxes that income would have carried), care cost, and career re-entry penalty, then reported as a change in your FI Age (the year your portfolio reaches ~25× the expenses it must cover after Social Security — roughly 20× your total annual expenses) and PeakWorth (highest projected lifetime net worth), so the comparison becomes a dated, dollar-and-year answer rather than 'daycare cost vs $0.'