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SOUTHWEST INSTITUTE OF MONTESSORI STUDIES

EIN 27-5014341 MESA, AZ

Browse the largest nonprofits in Arizona

Revenue 2023
$1,045,095
Expenses 2023
$1,335,392

Program services were 59.8% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
B40
Classification
2000
Street
207 N MESA DR

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).

Other organizations at this address

1 other organization in the IRS Business Master File lists the same street address. matched by us

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2023

Mission

TO PROVIDE COURSEWORK IN ACCORDANCE TO ASSOCIATION MONTESSORI INTERNATIONAL (AMI) STANDARDS.

  • PROVIDED COURSEWORK IN ACCORDANCE TO AMI STANDARDS.

    Expenses $798,524 · Revenue $998,425

As filed on the 2023 return.

Officers and directors · 2023

As listed in Part VII of the 2023 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Sherri Sampson

    PRESIDENT

    Total calculated
    $73,130
    From this org
    $71,000
    From related orgs
    $0
    Other
    $2,130
    Hours/week
    20

  • Cindy Maschoff

    SECRETARY

    Total calculated
    $0
    Hours/week
    1

  • Shannon Helfrich

    MEMBER

    Total calculated
    $0
    Hours/week
    1

  • Peter Davidson

    MEMBER

    Total calculated
    $0
    Hours/week
    1

  • Gibson McKay

    MEMBER

    Total calculated
    $0
    Hours/week
    1

  • Andy Woodward

    MEMBER

    Total calculated
    $0
    Hours/week
    1

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

  • 2023
    Revenue
    $1,045,095
    Expenses
    $1,335,392
    Contributions
    $46,619
    Grants paid
    $0
  • 2022
    Revenue
    $1,713,122
    Expenses
    $1,792,028
    Contributions
    $201,767
    Grants paid
    $0

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.

Other returns filed

  • 2021 · 990

    Revenue
    $1,698,159
    Expenses
    $1,561,185
    Assets (EOY)
    $1,030,754

  • 2020 · 990

    Revenue
    $1,507,240
    Expenses
    $1,477,819
    Assets (EOY)
    $669,838

  • 2019 · 990

    Revenue
    $1,227,294
    Expenses
    $1,225,296
    Assets (EOY)
    $807,655

  • 2018 · 990

    Revenue
    $849,757
    Expenses
    $655,902
    Assets (EOY)
    $2,431,747

  • 2017 · 990

    Revenue
    $503,420
    Expenses
    $509,118
    Assets (EOY)
    $207,433

  • 2016 · 990

    Revenue
    $426,448
    Expenses
    $324,778
    Assets (EOY)
    $149,019

  • 2015 · 990-EZ

    Revenue
    $89,725
    Expenses
    $107,846
    Assets (EOY)
    $17,071

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all.

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

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared on its 2023 return

Declared as related by

Other IRS files

Auto-Revocation List

  • Exemption revoked 15 November 2013, reinstated 15 November 2013.

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 2023, the newest we have parsed for this organization.