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Cost & Financial Aid

Annual Tuition

  • St. Thomas2,790,000 (2026-27 rate)
  • O'Connell910,000 (2025-26 rate (newest published))
  • St. Agnes2,840,000 (2026-27 rate)
  • Duchesne3,360,000 (2026-27 rate · Upper School)

Merit Scholarships

  • St. ThomasYes (Academic Scholarship Program (ISEE-based), Gabel Scholarship (80% tuition, ~2/yr), Basilian Fathers', Principal's/Aquinas scholarships (GPA-renewable). Sibling discount $2,000/yr after first.)
  • O'ConnellYes (Merit awards for academic performance + extracurricular involvement; parish/community scholarships; multi-student assistance)
  • St. AgnesNo (Explicit: aid is need-based only, regardless of talents)
  • DuchesneYes ($15,000/yr renewable: Janet Erskine Stuart (Catholic middle-schoolers), Madeleine Sophie Barat (continuing Duchesne 8th), Rose Philippine Duchesne (incoming 9th, other schools))

Need-Based Financial Aid

  • St. ThomasYes (~1/3 of students aided; $2.7M+/yr; awards 10-95% of tuition; Blackbaud; deadline Jan 15, 2027; awards mid-March)
  • O'ConnellYes (Guardian Angel Scholarship (needs-based, volunteer component) via FACTS Grant & Aid; TEFA state accounts accepted)
  • St. AgnesYes (~20% of students receive aid; ~$2.95M/yr (2025-26). Blackbaud, school code 14060, $35 fee.)
  • DuchesneYes ($2M+ awarded annually to ~26% of students; Clarity portal)

Payment Plans

  • St. ThomasNot Published
  • O'ConnellNot Published
  • St. AgnesAnnual (Jul 1) · Semi-annual $13,950 × 2 (Jul 1 / Dec 1) · 10 monthly Jul–Apr (+4% deferral fee)
  • DuchesneFull (May 20) · 2-pay (May / Nov) · 12-month monthly

Sibling Discount

  • St. Thomas$2,000/yr per sibling after the first
  • O'ConnellMulti-student assistance available (amount not published)
  • St. AgnesNot Published
  • DuchesneNot Published

Aid Award Notification

  • St. ThomasNot Published
  • O'ConnellNot Published
  • St. AgnesNot Published
  • Duchesne2027-03-05 (Award acceptance Mar 24, 2027.)

Included in Tuition

  • St. ThomasLaptop & technology
  • O'ConnellNot Published
  • St. AgnesNot Published
  • DuchesneNot Published
Commute from home
Tuition
$27,900

2026-27 rate

$9,100

2025-26 rate (newest published)

$28,400

2026-27 rate

$33,600

2026-27 rate · Upper School

What's included
Included in tuition see list
  • Laptop & technology

Charged separately:

  • Application fee: $75
  • Registration fee: $700
  • Camp Aquinas (freshman retreat): $650 (freshmen)
  • Class retreat: $325 (returning/transfer students)
  • Books: $550
  • Athletics fee: $250 (per sport) — optional
  • AP exam: $99 (per course) — optional
Fees listed separately see fees
  • Registration fee: $450
  • Technology fee: $200
  • Sports fee: $150–$250 (per sport ($450 all-season package)) — optional
Fees listed separately see fees
  • Application fee: $75 ($125 for transfer applicants)
  • Enrollment deposit: $500
  • Tablet PC (technology): $1,725
  • AP test fee: $105 (per AP / Honors-AP class) — optional
  • Senior fee: $350 (seniors only) — optional
  • Athletics fee: $150 (per sport) — optional
Fees listed separately see fees
  • New Student Fee: $1,500
  • Enrollment deposit: $1,000
  • Technology fee (Grade 9): $2,600
  • Textbooks: $350 (approximate, Upper School)
  • Grade 10 College Tour: $500 (grade 10)
  • Graduation fee: $600 (seniors)
  • Class trips: $175–$2,800 — optional
  • AP exams: $100–$200 (per exam) — optional
  • Athletics fee: $150–$300 (per sport) — optional
Sibling discount$2,000/yr per sibling after the firstMulti-student assistance available (amount not published)Not PublishedNot Published
Lower school on campusHS onlyHS onlyHS only
Yes

PK3–12

Open houseDec 6, 2026Not postedNot postedNov 1, 2026
Required test
ISEE

Offered on campus: Nov 14, 2026 · Jan 9, 2027

In-house placement test
ISEE

Offered on campus: Nov 14, 2026

ISEE
Application deadlineJan 15, 2027Not postedNot postedNot posted
Decision dateMar 5, 2027Not postedNot postedNot posted
Financial aid
Need-based + Merit
Need-based + Merit
Need-based

No merit scholarships

Need-based + Merit
AP courses21Not posted2520
Enrollment79180934300
Student:Teacher9:14.5:19:18.1:1
Mass
Monthly
Monthly
Weekly

Thursdays, 9:10 AM

Not Published
Sports12 sports13 sports12 sports12 sports
Links

“Not posted” means the school hasn’t published it yet for this admissions cycle — check each school’s full profile for sources.