Castle Island Bilingual Montessori shows signs of real financial distress. On the latest filing, net assets are negative on the latest filing — liabilities exceed total assets, so there is no reserve cushion. Revenue runs 80% tuition-dependent (peer median 85%), diversified by day-school standards, with meaningful contribution and investment income. Staff compensation runs 73% of expenses, generous relative to peers. Expenses are outpacing revenue 15.6% vs 12.1% per year over three years, signaling margin compression worth flagging. NACUBO Composite Financial Index: -2.1 / 10, distressed.
Castle Island Bilingual Montessori reported $637K in revenue against $662K in expenses in fiscal year 2024, the most recent filing on record. Net assets stood at -$28K.
Operating margin landed at -4.0%, with 79.8% of revenue coming from tuition. Among same-size peers, that puts Castle Island Bilingual Montessori at the p27 on operating margin.
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Why “revenue scale” and not “endowment per student”: independent-school 990s don’t carry per-school enrollment, and NCES PSS coverage is partial, so we cannot divide endowment by a verified student count for every school. The bar above is each school’s latest reported total revenue. True endowment-per-student is scheduled for v1.1+ once Schedule D Part V parsing lands.
Peers are scored by similarity along three equal-weighted dimensions: size cohort (Form 990 employee count + max-revenue tier, a proxy for student enrollment, which the 990 does not carry), geographic region (eight-region grouping), and association overlap (NAIS, NBOA, regional councils). We rank the top 20 nearest peers and chart the first 12 by latest reported revenue. Values are the school’s most recently filed total revenue on IRS Form 990.