| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Unconfirmed — check official site | Catalog terms: $4,499–$15,999; 2027: Unconfirmed — check official site | $8,250–$11,850 (2027 cycle) |
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| Financial aid | Last year's cycle (2026): Free for U.S. families with adjusted gross income under $80,000; need-based aid up to full cost: Amount: Unconfirmed — check official site. Aid for international students is decided case by case.; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Catalog terms: Need-based financial aid (U.S. applicants only): Amount: Unconfirmed — check official site. Limited and competitive; not available to international applicants or to students who received Exeter Summer aid before.; 2027: Unconfirmed — check official site |
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| Expenses and aid conditions | Last year's cycle (2026): Free for U.S. families with adjusted gross income under $80,000; need-based aid up to full cost: Amount: Unconfirmed — check official site. Aid for international students is decided case by case.; 2027: Unconfirmed — check official site | Catalog terms: Application fee (non-refundable): $100; Enrollment deposit (by enrollment date): $1,900–$3,500; International student registration fee: $239–$379. For students living outside the United States; $239 commuter, $379 residential.; 2027: Unconfirmed — check official site | Catalog terms: Application fee: $100; Need-based financial aid (U.S. applicants only): Amount: Unconfirmed — check official site. Limited and competitive; not available to international applicants or to students who received Exeter Summer aid before.; 2027: Unconfirmed — check official site |
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| Stipend or pay | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Eligibility | Grades 10–12; Grade timing: Unconfirmed — check official site | Grades 9–12; Grade timing: Unconfirmed — check official site | Grades 7–12 when applying; check the provider's rules for graduating seniors |
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| Additional eligibility | Ages 14–18; Requirement: Open to grades 10–12; Requirement: Have completed 9th grade (or its equivalent) by the first day of the program; Requirement: Not yet enrolled as a full-time college or university student; Requirement: Graduating seniors may attend in the summer between high school and college or during a gap year | Requirement: Open to grades 9–12 | Ages 13–18; Requirement: Open to students currently in grades 7–12 when applying; Requirement: Must attend the entire length of the program; Requirement: Non-native English speakers with fewer than five years of primary-language instruction in English need a TOEFL iBT score of 100 or higher |
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| Session dates or duration | Starts June 27, 2027; Ends August 7, 2027; 6 weeks (2027 cycle) | Catalog terms: 2–5 weeks; 2027: Unconfirmed — check official site | Starts July 5, 2027; Ends August 5, 2027 (2027 cycle) |
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| Format | In person | In person | In person |
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| Housing and supervision | Residential. Supervision and housing details: Unconfirmed — check official site | Residential. Supervision and housing details: Unconfirmed — check official site | Unconfirmed — check official site |
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| Location | Boston, MA | Los Angeles, CA | Exeter, NH |
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| Selection and application | Selection: About 80 high-school students are selected through demonstrated mathematical thinking in the problem set, academic context, recommendation, transcript, and short answers. PROMYS does not publish the current applicant count or acceptance rate. Application materials: One letter of recommendation | Unconfirmed — check official site | Application materials: One- to two-page personal essay; School official recommendation (with attendance information and a grade report); English teacher recommendation; Math or science teacher recommendation |
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| Official sources | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-08-20Source 5 · checked 2026-08-20Source 6 · checked 2026-08-20Source 7 · checked 2026-08-20 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-10-09Source 5 · checked 2026-08-20 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-10-09 |
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