licensed child care center
ABBEY MONTESSORI CHILDREN'S CENTER - INFANT
San Rafael, CA
Youth and community nonprofits / California / San Rafael
Amateur sports competitions
Tamalpais Aquatic Masters
A tax-exempt nonprofit in San Rafael, California, classified by the IRS as amateur sports competitions. For the year ending Dec 2025 it reported $139,385 in revenue and $132,341 in expenses.
What it says it does
“To provide education, training, and coaching necessary to compete in local,national, and international swimming events. The organization also promotes physical and mental fitness through swimming.”From the organization's Form 990-EZ for the year ending Dec 2025, as written (including spelling); all-capital text shown in normal capitalization.
IRS facts
Type: Amateur sports competitions (IRS activity code N70)
Mailing city (IRS): San Rafael, California 94915
EIN: 94-2690359
Tax status: 501(c)(3), eligible to receive tax-deductible donations; IRS-recognized as tax-exempt since 2022, per IRS records posted October 13, 2026.
Revenue on its latest IRS filing: $139,385 (year ending Dec 2025)
Check its status on IRS Tax Exempt Organization Search · Filings on ProPublica Nonprofit Explorer
Tamalpais Aquatic Masters finances
From the annual returns the group files with the IRS (Form 990, or the shorter Form 990-EZ for smaller groups), 4 filed years. Net assets are what it owns minus what it owes; management and general is office, admin and insurance cost. A dash means not reported (the short form does not ask for employees or volunteers). Each figure links to that year's return. A year is left out when no return is in the IRS e-file data; that does not mean the group was inactive.
| Year ending | Dec 2021 | Dec 2023 | Dec 2024 | Dec 2025 |
|---|---|---|---|---|
| Total revenue | $60,571 | $119,401 | $131,926 | $139,385 |
| Total expenses | $60,269 | $118,146 | $143,890 | $132,341 |
| Total assets | $20,337 | $36,142 | $30,647 | $56,668 |
| Liabilities | - | $1,466 | $7,935 | $27,182 |
| Net assets | $20,337 | $34,676 | $22,712 | $29,486 |
| IRS form | Form 990-EZ | Form 990-EZ | Form 990-EZ | Form 990-EZ |
Where the money goes, year ending Dec 2025
Small groups file the shorter Form 990-EZ, which reports program spending but not the management and fundraising split.
Where the money comes from, year ending Dec 2025
Revenue trend: Growing. Revenue went from $60,571 (year ending Dec 2021) to $139,385 (Dec 2025), about +23% a year.
Growth label: we compare total revenue on the oldest and the newest return shown above. Growing means revenue rose by more than 10% a year on average, Shrinking means it fell by more than 10% a year, and Steady means a change between -10% and +10% a year. The rate is the compounded yearly average between the two returns, so it hides ups and downs in between (see the table). We only label groups with returns at least a year apart and at least $5,000 of revenue on the oldest one. This is our own calculation, not an IRS rating or a judgment of quality.
Source: IRS Form 990 Series Downloads (the returns open on ProPublica Nonprofit Explorer, which republishes the IRS files). Figures are as the organization filed them. California nonprofit.
How it compares
4 of 20 amateur sports nonprofits in San Rafael when sorted from largest to smallest revenue. This shows size only, not quality. Groups with no reported revenue are listed last.
Size: revenue of $139,385 is higher than roughly 40 to 50% of the 2,432 amateur sports nonprofits in California that report revenue to the IRS (the city count above also includes groups with none). The median is $143,571.
Our analysis of the IRS Business Master File (posted October 13, 2026), using each group's latest reported revenue. Groups are sorted by revenue and split into ten equal bands, using all California groups of this type (Amateur sports, which covers several IRS activity codes). Size only, not a rating.
Around San Rafael and its county
Licensed programs in San Rafael
39 licensed child care centers, 2 school-age programs are in state licensing records and listed in the BackPR finder. The examples below are not related to this organization.
licensed child care center
ABBEY MONTESSORI CHILDREN'S CENTER - PRESCHOOL
San Rafael, CA
licensed child care center
ACQUA MONTESSORI SCHOOL
San Rafael, CA
licensed child care center
ACQUA TODDLER HOUSE
San Rafael, CA
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BRIGHT STARS CHILDREN'S CENTER
San Rafael, CA
licensed child care center
BRIGHT STARS CHILDREN'S CENTER
San Rafael, CA
California background check rules for youth programs · How BackPR works for amateur sports nonprofits
Questions about Tamalpais Aquatic Masters
What is Tamalpais Aquatic Masters's EIN?
Tamalpais Aquatic Masters's EIN (Employer Identification Number) is 94-2690359. It is the nine-digit number the IRS uses to identify the organization. Source: IRS Exempt Organizations Business Master File posted October 13, 2026.
Is Tamalpais Aquatic Masters a nonprofit?
Yes. The IRS lists Tamalpais Aquatic Masters in San Rafael, California as tax-exempt under section 501(c)(3), recognized since 2022. This is from the IRS Business Master File posted October 13, 2026. Status can change, so check its current status on the IRS Tax Exempt Organization Search before you donate.
Are donations to Tamalpais Aquatic Masters tax-deductible?
Yes, the IRS lists gifts to Tamalpais Aquatic Masters as tax-deductible (IRS Business Master File posted October 13, 2026). How much you can deduct depends on your own taxes, and this is not tax advice. Check its current status on the IRS Tax Exempt Organization Search before you donate.
What does Tamalpais Aquatic Masters do?
In its own words on its Form 990 for the year ending Dec 2025: "To provide education, training, and coaching necessary to compete in local,national, and international swimming events. The organization also promotes physical and mental fitness through swimming." The IRS classifies it as: Amateur sports competitions.
How much money does Tamalpais Aquatic Masters take in?
For the year ending Dec 2025, Tamalpais Aquatic Masters reported total revenue of $139,385 and total expenses of $132,341 on its Form 990-EZ (IRS Form 990 e-file data).
Do you run this organization?
You can add your programs, season dates, ages, prices, registration link and logo to this page, or ask us to remove it. BackPR's free plan for 501(c)(3)s handles online registration, payments, waivers and attendance. No subscription and no BackPR fee on what families pay (card processing fees from Stripe still apply).
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Free forms for amateur sports nonprofits
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Source: IRS Exempt Organizations Business Master File, posted October 13, 2026. We list 501(c)(3) organizations whose IRS activity code is youth development, amateur sports, camps and recreation, parent-teacher groups, children's services, child day care or arts education. We show the city and ZIP code only, never a street address or contact person. A listing is not an endorsement.
Data as of November 8, 2026. Sources: IRS Business Master File (posted October 13, 2026), IRS Form 990 series e-file data, state child care licensing records in the BackPR finder. Growth labels, ranks and percentiles are BackPR's own calculations.
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