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Cost & Financial Aid

Annual Tuition

  • St. Catherine's2,056,000 (2026-27 rate · 9th grade; grades 10-12: $20,753)
  • St. Thomas2,790,000 (2026-27 rate)
  • O'Connell910,000 (2025-26 rate (newest published))
  • Duchesne3,360,000 (2026-27 rate · Upper School)

Merit Scholarships

  • St. Catherine'sNot published
  • 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)
  • 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. Catherine'sYes (FACTS (Archdiocese form auto-applies to SCM's own program); opens Dec, due Mar. TEFA participant, but may reduce school aid when TEFA funds received.)
  • 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)
  • DuchesneYes ($2M+ awarded annually to ~26% of students; Clarity portal)

Sibling Discount

  • St. Catherine's10% off for each younger sibling
  • St. Thomas$2,000/yr per sibling after the first
  • O'ConnellMulti-student assistance available (amount not published)
  • DuchesneNot Published

Aid Award Notification

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

Included in Tuition

  • St. Catherine'sNot Published
  • St. ThomasLaptop & technology
  • O'ConnellNot Published
  • DuchesneNot Published

Payment Plans

  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • O'ConnellNot Published
  • DuchesneFull (May 20) · 2-pay (May / Nov) · 12-month monthly
Commute from home
Tuition
$20,560

2026-27 rate · 9th grade; grades 10-12: $20,753

$27,900

2026-27 rate

$9,100

2025-26 rate (newest published)

$33,600

2026-27 rate · Upper School

What's included
Fees listed separately see fees
  • Application fee: $150
  • Tuition deposit: $750
  • New Student Fee: $850
  • Facility fee: $800
  • Program fee: $2,500–$2,750
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
  • 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 discount10% off for each younger sibling$2,000/yr per sibling after the firstMulti-student assistance available (amount not published)Not Published
Lower school on campus
Yes

14 months–12th (Montessori)

HS onlyHS only
Yes

PK3–12

Open houseNot postedDec 6, 2026Not postedNov 1, 2026
Required test
None
ISEE

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

In-house placement test
ISEE
Application deadlineJan 15, 2027Jan 15, 2027Not postedNot posted
Decision dateMar 5, 2027Mar 5, 2027Not postedNot posted
Financial aid
Need-based
Need-based + Merit
Need-based + Merit
Need-based + Merit
AP coursesNot posted21Not posted20
Enrollment2379180300
Student:Teacher14.4:19:14.5:18.1:1
Mass
Monthly
Monthly
Monthly
Not Published
Sports6 sports12 sports13 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.