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Cost & Financial Aid

Annual Tuition

  • St. John XXIII2,210,000 (2026-27 rate)
  • St. Catherine's2,056,000 (2026-27 rate · 9th grade; grades 10-12: $20,753)
  • Duchesne3,360,000 (2026-27 rate · Upper School)

Merit Scholarships

  • St. John XXIIIYes (SJ23 Merit Scholarship for students demonstrating excellence)
  • St. Catherine'sNot published
  • 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. John XXIIIYes (Clarity ($60 fee); aid families also apply for TEFA (doesn't reduce SJ23 aid) and complete 10-40 volunteer hours)
  • 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.)
  • DuchesneYes ($2M+ awarded annually to ~26% of students; Clarity portal)

Payment Plans

  • St. John XXIII1 payment (no fee) · 2 payments (+$100) · 10 payments May-Feb (+$200)
  • St. Catherine'sNot Published
  • DuchesneFull (May 20) · 2-pay (May / Nov) · 12-month monthly

Sibling Discount

  • St. John XXIII2nd student $17,680 ($4,420 off)
  • St. Catherine's10% off for each younger sibling
  • DuchesneNot Published

Aid Award Notification

  • St. John XXIIINot Published
  • St. Catherine'sNot Published
  • Duchesne2027-03-05 (Award acceptance Mar 24, 2027.)
Commute from home
Tuition
$22,100

2026-27 rate

$20,560

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

$33,600

2026-27 rate · Upper School

What's included
Fees listed separately see fees
  • New Student Enrollment Fee: $500
  • Financial aid application (Clarity): $60 — optional
Fees listed separately see fees
  • Application fee: $150
  • Tuition deposit: $750
  • New Student Fee: $850
  • Facility fee: $800
  • Program fee: $2,500–$2,750
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 discount2nd student $17,680 ($4,420 off)10% off for each younger siblingNot Published
Lower school on campusHS only
Yes

14 months–12th (Montessori)

Yes

PK3–12

Open houseNot postedNot postedNov 1, 2026
Required test
ISEE
None
ISEE
Application deadlineNot postedJan 15, 2027Not posted
Decision dateNot postedMar 5, 2027Not posted
Financial aid
Need-based + Merit
Need-based
Need-based + Merit
AP coursesNot postedNot posted20
Enrollment43223300
Student:Teacher11.3:114.4:18.1:1
Mass
Weekly

Daily Mass also offered

Monthly
Not Published
Sports13 sports6 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.