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CHESTERTON ACADEMY OF ST LOUIS

EIN 88-1322947 SAINT LOUIS, MO

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Revenue 2024
$892,588
Expenses 2024
$740,578

Program services were 79.7% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
B25
Classification
2000
Street
PO BOX 410410

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Mission and programs · 2024

Mission

Under the patronage of G.K. Chesterton and in partnership with families and the Church, the mission of Chesterton Academy of St. Louis is to foster a Culture of Life by forming a new generation of joyful leaders and saints, educated in the classical tradition and grounded in the truths of the Catholic faith.

Activities or mission (Part I)

This organization is a pro-family Catholic high school offering an integrated college preparatory classical curriculum. The purpose of Chesterton Academy is to nurture the minds and souls of our children through an integrated education. We believe that all truths are related to the central truth of the incarnation, crucifixion, and the resurrection of Jesus Christ. Faith and reason do not contradict one another, nor are they to be segregated from one another. Through the study of art, music, literature, language, history, math, science, philosophy, and religion, we want to prepare our children to think both rationally and creatively, to defend their faith, to contribute positively to society, and to promote a culture of life.

  • Going into Chesterton Academy of St. Louis's (CASTL) second year, the school doubled in size, bringing in more tuition revenue, but also increasing the expenses by requiring more faculty and expanding the lease. CASTL was able to continue providing daily Mass for and frequent opportunities for Confession for the students. CASTL continues to have a very strong base of dedicated volunteers who help provide amazing experience experiences for the students at a reasonable cost.

    Expenses $590,155 · Grants $35,360 · Revenue $586,551

As filed on the 2024 return.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Matthew Schimpf

    Headmaster

    Total calculated
    $89,275
    From this org
    $89,275
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

  • Maria Jansen

    Board Chair

    Total calculated
    $0
    Hours/week
    30

  • Danielle Morgenthaler

    Board Vice Chair

    Total calculated
    $0
    Hours/week
    4

  • Frank O'Brien III

    Board Treasurer

    Total calculated
    $0
    Hours/week
    3

  • Michael Quinlan

    Board Secretary

    Total calculated
    $0
    Hours/week
    2

  • Christina Heddell

    Board Member

    Total calculated
    $0
    Hours/week
    20

  • John Heithaus

    Board Member (May-June)

    Total calculated
    $0
    Hours/week
    0.75

  • John Stirton

    Board Member

    Total calculated
    $0
    Hours/week
    3

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $892,588
    Expenses
    $740,578
    Contributions
    $304,786
    Grants paid
    $35,360
  • 2023
    Revenue
    $636,367
    Expenses
    $431,698
    Contributions
    $541,749
    Grants paid
    $0
  • 2022
    Revenue
    $398,443
    Expenses
    $76,481
    Contributions
    $364,926
    Grants paid
    $1,000

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Form 990-N e-Postcard, tax year 2021

Tax period
25 March 2022 to 30 June 2022
Principal officer
Maria Jansen
Mailing address
PO BOX 410410SAINT LOUIS MO 63141
Website
CHESTERTONACADEMYSTL.ORG

As filed, from the IRS e-Postcard file of 9 November 2026. The IRS publishes only each organization's most recent postcard, so earlier years are not shown. A 990-N carries no financial detail. The postcard also gives the principal officer's address, which is not shown here.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 11 November 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 9 November 2026 and read 9 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.