Nonprofit · EIN 27-0431277
RIVER MONTESSORI CHARTER SCHOOL
Tax-exempt · PETALUMA, CA 94954
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| June 30, 2025 | 990 | $2,232,287 | $2,333,309 | -$101,022 | $1,105,183 | $962,502 | $142,681 |
| June 30, 2024 | 990 | $1,979,259 | $2,460,903 | -$481,644 | $958,008 | $714,305 | $243,703 |
| June 30, 2023 | 990 | $2,159,034 | $2,304,712 | -$145,678 | $1,894,417 | $1,169,070 | $725,347 |
Financial details: 990 for the year ended June 30, 2025
Revenue
- Contributions, gifts and grants
- $2,097,070
- of which government grants
- $1,944,742
- Program service revenue
- $129,396
- Investment income
- $5,821
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $150,080
- Other salaries and wages
- $1,049,441
- Salaries, compensation and benefits (total)
- $1,528,484
- Professional fundraising fees
- $0
- Legal fees
- $6,202
- Accounting fees
- $91,631
- Occupancy
- $490,041
- Travel
- $1,181
- Depreciation
- $15,418
- Program services (functional)
- $1,910,252
- Management and general (functional)
- $423,057
Balance sheet and other
- Total assets, start of year
- $958,008
- Total assets, end of year
- $1,105,183
- Total liabilities, end of year
- $962,502
- Net assets, end of year
- $142,681
- Land, buildings and equipment
- $10,221
- Net assets without donor restrictions
- $142,681
- Gross receipts
- $2,232,287
- Employees
- 37
- Volunteers
- 35
- Year formed
- 2007
- State of legal domicile
- CA
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990 for the year ended June 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| KELLY GRIFFITH MANNION | EXECUTIVE DIRECTOR/SUPERINTENDENT Officer | 40 | $146,964 | $31,186 |
| LORNA ROCHMAN | STUDENT SERVICES COORDINATOR Highest-paid employee | 40 | $109,037 | $22,961 |
| JUDITH MATTHEWS | CHAIR Trustee or director, Officer | 2 | $0 | $0 |
| TIM LOHRENTZ | VICE CHAIR/TREASURER Trustee or director, Officer | 2 | $0 | $0 |
| GINNY HAUTAU | SECRETARY Trustee or director, Officer | 2 | $0 | $0 |
| MICHELLE HAMMONS | DIRECTOR Trustee or director | 2 | $0 | $0 |
| MAUDE AKOGNON | DIRECTOR Trustee or director | 2 | $0 | $0 |
| VINODE MAHRAJ | DIRECTOR Trustee or director | 2 | $0 | $0 |
990 for the year ended June 30, 2024: 7 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| KELLY GRIFFITH MANNION | EXECUTIVE DIRECTOR & SUPERINTENDENT Officer | 60 | $146,964 | $28,666 |
| JUDITH MATTHEWS | CHAIRPERSON Trustee or director, Officer | 2 | $0 | $0 |
| TIM LOHRENTZ | VICE CHAIRPERSON AND TREASURER Trustee or director, Officer | 2 | $0 | $0 |
| GINNY HAUTAU | SECRETARY Trustee or director, Officer | 2 | $0 | $0 |
| MAUDE AGOGNON | PARENT MEMBER Trustee or director | 2 | $0 | $0 |
| TENCY CHINCHILLA | PARENT MEMBER Trustee or director | 2 | $0 | $0 |
| MICHELLE HAMMONS | COMMUNITY MEMBER Trustee or director | 2 | $0 | $0 |
990 for the year ended June 30, 2023: 7 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| KELLY GRIFFITH MANNION | EXECUTIVE DIRECTOR Officer | 40 | $127,260 | $20,675 |
| GINNY HAUTAU | CHAIRPERSON Trustee or director, Officer | 2 | $0 | $0 |
| TIM LORENTZ | VICE CHAIR AND TREASURER Trustee or director, Officer | 2 | $0 | $0 |
| JUDITH MATTHEWS | SECRETARY Trustee or director, Officer | 2 | $0 | $0 |
| MICHELLE HAMMONS | COMMUNITY MEMBER Trustee or director | 1 | $0 | $0 |
| HEATHER STRONG | COMMUNITY MEMBER Trustee or director | 1 | $0 | $0 |
| MAUDE AKOGNAN | PARENT MEMBER Trustee or director | 2 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 3880 CYPRESS DR, PETALUMA, CA 94954-5613
- In care of
- % CHRISTINA ISETTA
- Principal officer (990 for 2024)
- KELLY GRIFFITH MANNION, 3880 CYPRESS DR B, PETALUMA, CA 949545613
- Signed the 990
- KELLY GRIFFITH MANNION, EXECUTIVE DIRECTOR
- Phone
- (707) 779-6414
- Return prepared by
- CHRISTY WHITE ASSOCIATES
California records
California keeps its own records of charities and corporations. Search them by EIN 27-0431277 or by the name RIVER MONTESSORI CHARTER SCHOOL.
- Attorney General, Registry of Charities and Fundraisers
- Registration status and filed reports (CT-TR-1, RRF-1)
- Secretary of State, bizfile Online
- Corporation status, entity number, agent for service
- Franchise Tax Board
- Entity status letter (state tax exemption, good standing)
Mission
OUR MISSION AT RIVER MONTESSORI CHARTER SCHOOL IS TO PROVIDE STUDENTS WITH A LEARNING CULTURE GROUNDED IN MONTESSORI PHILOSOPHY. THIS HISTORICALLY PROVEN EDUCATIONAL MODEL SUPPORTS THE WHOLE CHILD, CREATES LIFELONG LEARNERS, AND EDUCATES FOR PEACE. (CONT. ON SCH. O)THE RESULTING ACADEMIC EXCELLENCE IS SUPPORTED BY A PREPARED CLASSROOM ENVIRONMENT THAT INSPIRES SELF-PACED, INDIVIDUALIZED DISCOVERY; A LOVE OF LEARNING; AND RESPECT FOR SELF, OTHERS, AND THE ENVIRONMENT.
Program accomplishments
- RIVER MONTESSORI CHARTER SCHOOL (RMCS) IS A FULLY NON-PROFIT AND INDEPENDENT ORGANIZATION WHICH PROUDLY SERVES A BEAUTIFUL AND DIVERSE POPULATION OF APPROXIMATELY 150 CHILDREN FROM TRANSITIONAL KINDERGARTEN - SIXTH GRADE WITH A FREE AND PUBLIC MONTESSORI EDUCATION. RMCS IS A LEARNING COMMUNITY WHERE CHILDREN ARE INSPIRED TO REALIZE THEIR ACADEMIC, PERSONAL, AND SOCIAL POTENTIAL TO BECOME GLOBAL CITIZENS. THE HISTORICALLY PROVEN MONTESSORI EDUCATIONAL MODEL SUPPORTS THE WHOLE CHILD, CREATES LIFELONG LEARNERS, AND EDUCATES FOR PEACE. THE RESULTING ACADEMIC EXCELLENCE IS SUPPORTED BY A PREPARED CLASSROOM ENVIRONMENT THAT INSPIRES SELF-PACED, INDIVIDUALIZED DISCOVERY AND A LOVE OF LEARNING, AS WELL AS RESPECT FOR SELF, OTHERS, AND THE ENVIRONMENT.Expenses $1,910,252 · revenue $129,396
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in June, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | June 30, 2026 | November 16, 2026 | Not due yet |
| 2024 | June 30, 2025 | November 17, 2025 | 990 on file |
| 2023 | June 30, 2024 | November 15, 2024 | 990 on file |
IRS record
- EIN
- 27-0431277
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- School
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2015
- Accounting year ends
- June
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Education (B24)
- Assets (IRS master file)
- $1,105,183
- Income (IRS master file)
- $2,232,287
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | June 2025 | $2,232,287 | $2,333,309 | $1,105,183 | IRS |
| 990 | June 2024 | $1,979,259 | $2,460,903 | $958,008 | IRS |
| 990 | June 2023 | $2,159,034 | $2,304,712 | $1,894,417 | XML |
| 990 | June 2022 | $2,030,639 | $2,189,462 | $1,116,906 | IRS |
| 990 | June 2021 | – | – | – | IRS |
| 990 | June 2020 | – | – | – | IRS |
| 990 | June 2019 | – | – | – | IRS |
| 990 | June 2018 | – | – | – | IRS |
990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 27-0431277).
Questions about RIVER MONTESSORI CHARTER SCHOOL
- What is the EIN of RIVER MONTESSORI CHARTER SCHOOL?
- The employer identification number (EIN) of RIVER MONTESSORI CHARTER SCHOOL is 27-0431277.
- Is RIVER MONTESSORI CHARTER SCHOOL tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2015.
- Are donations to RIVER MONTESSORI CHARTER SCHOOL tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does RIVER MONTESSORI CHARTER SCHOOL file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of RIVER MONTESSORI CHARTER SCHOOL due?
- The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did RIVER MONTESSORI CHARTER SCHOOL last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended June 2025.
- Who is the principal officer of RIVER MONTESSORI CHARTER SCHOOL?
- The 990 for the year ended June 30, 2025 names KELLY GRIFFITH MANNION.
- Who are the officers and directors of RIVER MONTESSORI CHARTER SCHOOL?
- The 990 for the year ended June 30, 2025 lists 8 people; 2 received compensation from the organization, the highest $146,964 (KELLY GRIFFITH MANNION, EXECUTIVE DIRECTOR/SUPERINTENDENT).
- How much revenue does RIVER MONTESSORI CHARTER SCHOOL have?
- On its 990 for the year ended June 30, 2025 it reported revenue of $2,232,287, expenses of $2,333,309 and total assets of $1,105,183 at year end.
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