| Application deadline | Unconfirmed — check official site | January 13, 2027 (2027 cycle) | Unconfirmed — check official site |
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| Cost | Last year's cycle (2026): $3,900; 2027: Unconfirmed — check official site | $4,180–$15,980 (2027 cycle) | Last year's cycle (2026): $4,615–$7,100; 2027: Unconfirmed — check official site |
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| Financial aid | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Expenses and aid conditions | Unconfirmed — check official site | 2027 application fee: $75 (2027 cycle) | Last year's cycle (2026): Application fee: Amount: Unconfirmed — check official site. The current FAQ confirms the fee is nonrefundable but does not state its amount.; Tuition deposit: Amount: Unconfirmed — check official site. The current FAQ confirms a deposit and historical refund rules but not the amount.; Required international health insurance: Amount: Unconfirmed — check official site. Required for international scholars; current price is not stated.; 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 9–12; Grade timing: Unconfirmed — check official site | Unconfirmed — check official site | Grades 6–9; Grade timing: Unconfirmed — check official site |
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| Additional eligibility | Minimum age 14; Residency: Currently studying and residing in the United States; Requirement: Be at least 14 by program start; Requirement: Be a current high-school student; Requirement: Demonstrate good programming ability in Python, Java, C/C++, or another language; Requirement: Understand computer-science fundamentals; Requirement: Commit to the full-time six-week commuter or virtual schedule; Requirement: Provide one science, mathematics, or computer-science teacher reference; Exclusion: Applicants under 14 at program start; Exclusion: Applicants not currently studying and residing in the United States; Exclusion: Applicants unable to commit to the complete schedule; Exclusion: Applicants whose skills do not match available mentor projects | Ages 16–18; Citizenship: International students may apply to eligible formats with visa/English requirements; Citizenship: Financial aid is limited to U.S. citizens, permanent residents, and DACA recipients; Residency: Residential students live on campus; Residency: Commuters must live with a parent/guardian or approved adult age 25+ within reasonable commuting distance in New England; Residency: Online students participate from home; Requirement: Graduate high school and enter college in 2027, 2028 or 2029.; Requirement: Be at least 16 by June 13, 2027 and not turn 19 before July 31, 2027.; Requirement: Show maturity and academic readiness for intensive college-level work; Requirement: Meet selected-course prerequisites; Requirement: Submit English-proficiency evidence if English is not the native language; Requirement: Clear the calendar for the full program, especially residential study; Exclusion: An applicant may apply to only one Harvard Summer School high-school program in a year; Exclusion: International students using a Harvard-sponsored I-20 cannot take online classes; Exclusion: Participation does not guarantee Harvard College admission or another institution's acceptance of credit; Exclusion: No minimum GPA or required PSAT/SAT/ACT score is published | Residency: Students from the United States and other countries; Requirement: Be entering grade 6, 7, 8, or 9 after the summer; Requirement: Attend the full three-week program; Requirement: Upload a recent grade report and teacher comments; Requirement: Have English proficiency sufficient for discussion-centered classes; Requirement: Provide a local guardian able to assume responsibility within four hours in an emergency; Requirement: Bring a laptop and basic school supplies; Exclusion: Students entering grades 10-12 are not in the published eligibility range; Exclusion: International scholars generally need a Vericant Spoken English Evaluation score of at least 4.0 unless waived; Exclusion: International scholars must purchase the school health-insurance plan; Exclusion: Lawrenceville does not provide visa assistance or arrival/departure transportation |
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| Session dates or duration | Catalog terms: 6 weeks; 2027: Unconfirmed — check official site | Catalog terms: 4–7 weeks; 2027: Unconfirmed — check official site | Catalog terms: 3 weeks; 2027: Unconfirmed — check official site |
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| Format | In person / Online | In person / Online | In person |
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| Housing and supervision | Non-residential. Supervision and housing details: Unconfirmed — check official site | Unconfirmed — check official site | Non-residential. Supervision and housing details: Unconfirmed — check official site |
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| Location | Stony Brook, New York (commuter track), United States residency and study required; virtual track for students unable to commute | Cambridge, Massachusetts | Lawrenceville, New Jersey |
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| Selection and application | Selection: Mentors evaluate application strength and fit to limited project capacity; each accepted student receives a mentor assignment with the offer. Application materials: Essay of no more than two pages on a computing or data-analytics interest, motivation, programming skills, and past projects; One science, mathematics, or computer-science teacher recommendation submitted separately | Selection: Harvard evaluates essays, transcripts/current grades, counselor report, GPA, maturity, readiness, and program fit holistically; it publishes no minimum GPA and does not require standardized academic tests. Application totals, admit rate, option/course capacities, waitlist odds, and scholarship odds are not published. Application materials: Student-created online application and short essays | Selection: Registration is rolling and capacity-limited. The program may use a waitlist and class-specific waitlists, but it does not publish seats, applicant volume, acceptance rates, or course capacity. |
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| Official sources | Source 1 · checked 2026-08-20Source 2 · checked 2026-08-20 | Source 1 · checked 2026-10-09Source 2 · checked 2026-10-09Source 3 · checked 2026-10-09Source 4 · checked 2026-10-09Source 5 · checked 2026-10-09 | Source 1 · checked 2026-08-21Source 2 · checked 2026-08-21Source 3 · checked 2026-08-21Source 4 · checked 2026-08-21 |
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