Two kids cost about 1.7× one, not 2×. Here's how much you actually save by city.
A common fear for growing families: "another child means another full bill." The data says otherwise. Because of shared bedrooms, hand-me-downs, sibling discounts, and bulk buying, the per-child cost falls as family size grows. We modeled 1, 2, and 3 children on a moderate, public-school path across 10 cities.
| City | 1 child | 2 children | 3 children | Per-child saving (2 kids) |
|---|---|---|---|---|
| New York | $380,000 | $646,000 | $874,000 | 15% |
| London | $270,000 | $459,000 | $621,000 | 15% |
| Tokyo | $180,000 | $306,000 | $414,000 | 15% |
| Shanghai | $200,000 | $340,000 | $460,000 | 15% |
| Singapore | $280,000 | $476,000 | $644,000 | 15% |
| Sydney | $230,000 | $391,000 | $529,000 | 15% |
| Toronto | $240,000 | $408,000 | $552,000 | 15% |
| Dubai | $260,000 | $442,000 | $598,000 | 15% |
| Hong Kong | $260,000 | $442,000 | $598,000 | 15% |
| Seoul | $220,000 | $374,000 | $506,000 | 15% |
Across our cities, two children cost about 1.7× one child (roughly a 15% per-child saving) and three children about 2.3× one (roughly a 23% per-child saving). The saving percentage itself varies a little by city because housing and clothing shares differ.
Compare your own scenario with the calculator, or see a side-by-side city comparison.
No. Two children cost about 1.7× the cost of one (roughly a 15% per-child saving) because of shared housing, hand-me-downs, and sibling discounts. Three children cost about 2.3× one (roughly a 23% per-child saving).
Economies of scale: one extra bedroom serves multiple kids, clothing and gear are reused, and activities/bulk buying get cheaper per head.
Yes, slightly. Cities where housing and clothing are a larger share of total cost show a marginally bigger scale saving, because those are exactly the categories that benefit most from sharing.
They are gross modeling estimates and do not net out tax credits or allowances. See our Sources & References page for the subsidy frameworks we reference per country.
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