Levine expects New York's public schools to shed another 150,000 students in a decade

If Levine's projection holds, the system lands near 735,000 students, a further cut of about 17% from today's 885,000 ^[19]. The decade just ended already took more than 115,000 (more than, because the starting point was "over 1 million") ^[20], so over twenty years the city would be running a school system more than a quarter smaller ^[21].

Two separate forces feed those numbers. Migration is one. In Fiscal Policy Institute (FPI) data from 2024, households with a child under 6 were 30% of out-migrants and 14% of the population ^[2]. That ratio of about 2.1 matches the report's finding that they were 112% more likely to leave ^[18]. Births are the other. Each year's cohort since 2020 has been at least 10,000 children, roughly 9%, below 2019's, and the 2020 cohort turned five in 2025 ^[22]. Levine allows for both. "Affordability is a major factor, but not the only one, and we need to better understand every driver of this trend to respond with viable, data-driven solutions," he said ^[3]. None of the figures Fortune reports split the 150,000 between the two causes ^[5], or put a dollar cost on the decline for the city's budget or its bonds.

Affordability spending can slow the migration. It cannot enlarge the cohorts already born since 2020. Levine has drawn the practical conclusion. "This is not sustainable," he wrote of the shrinking schools ^[8], and the city will have to consolidate schools with sharply declining enrollment, Gothamist reported ^[9]. A school under 200 students still needs a principal and a heated building, so merging is how a falling headcount becomes lower spending. Planning to consolidate also means the city is not holding seats open on a bet that families come back.

On this evidence the revenue side looks steadier. A newer FPI report found that in typical years the top 1% of earners leave at one-quarter the rate of everyone else ^[10]. The households going are the ones using the schools, or rather the ones about to use them, since the exit gap is widest for families with children under 6 ^[1]. FPI's 2024 report still calls the outflow a policy failure that raises long-run fiscal and economic concerns ^[11].

The idea that demand for family housing is falling fits the record least. StreetEasy puts the income needed for a median-priced city home at $211,970 ^[12]. Only 15% of city households earn $200,000 or more ^[13], so fewer than 15% clear the bar ^[23]. The threshold fell $10,625 in a year ^[12], from about $222,595, a drop of under 5% ^[24]. Childcare adds to the bill: according to figures Fortune cites, care for an infant and a 4-year-old averages $28,190 a year nationally, about 19% of the $145,656 an average two-child household earns ^[16][17][25]. "There's basically no options for families to find an affordable housing situation," Emily Eisner, executive director of the Fiscal Policy Institute, told Fortune ^[15].

If the city merges schools as fast as enrollment falls, spending drops roughly in step with students. Keeping buildings open would spread the same budget over fewer children each year. Departures spreading up the income scale would reach the city's revenue and its credit, and the top-1% exit rate is the evidence against that for now ^[10]. I think the risk sits between the first two cases, in consolidation that runs years behind the headcount. The counter-thesis is that a further 17% drop is big enough to strain the budget however fast the mergers come ^[19]. This view fails if top earners start leaving at something close to everyone else's rate. The outflow would then hit revenue as well as school spending.