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San Diego County Tennis Umpires Association

  • San Diego, CA
  • Tax-exempt since Dec. 1976
  • EIN: 51-0205056

Organization summary

Type of Nonprofit

Designated as a Organizations for any of the following purposes: religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn't provide athletic facilities or equipment), or the prevention of cruelty to children or animals.

Donations to this organization are not tax deductible.

Summary charts: organization finances over time

Revenue
$401k (2025)

Expenses
$402k (2025)

Total Assets
$4.71k (2025)

Total Liabilities
$0 (2025)

Years with missing data
Source: Form 990 tax filings from 2012 to 2025

Tax Filings by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Fiscal Year Ending Nov.
2025

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$400,734
Expenses
$401,878
Net Income
-$1,144
Net Assets
$4,714
Notable Sources of Revenue Percent of Total Revenue
Contributions $1,150
0.3%
Program Services $399,584
99.7%
Investment Income $0
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $4,714
Total Liabilities $0
Net Assets $4,714
Compensation
Key Employees and Officers Compensation Related Other
Mark Kasimatis (President) $0 $0 $0
David Isaacs (Vice President) $0 $0 $0
Michael Addison (Secretary) $0 $0 $0
Daniel Martinez (Treasurer) $0 $0 $0
Lawrence Calder (Member At Large) $0 $0 $0
Doug Ronney (Member At Large) $0 $0 $0
Lawrence Calder (Member At Large) $0 $0 $0
Ping Wu (Member At Large) $0 $0 $0
Igor Privorotskiy (Member At Large) $0 $0 $0
+ View more people

Document Links

990
Filed on Dec. 17, 2025

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Nov.
2024

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$307,114
Expenses
$307,936
Net Income
-$822
Net Assets
$5,858
Notable Sources of Revenue Percent of Total Revenue
Contributions $1,110
0.4%
Program Services $306,004
99.6%
Investment Income $0
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $5,858
Total Liabilities $0
Net Assets $5,858
Compensation
Key Employees and Officers Compensation Related Other
Mark Kasimatis (President) $0 $0 $0
David Isaacs (Vice President) $0 $0 $0
Michael Addison (Secretary) $0 $0 $0
Daniel Martinez (Treasurer) $0 $0 $0
Lawrence Calder (Member At Large) $0 $0 $0
Doug Ronney (Member At Large) $0 $0 $0
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Document Links

990
Filed on Dec. 11, 2024

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Nov.
2023

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$244,246
Expenses
$243,920
Net Income
$326
Net Assets
$6,680
Notable Sources of Revenue Percent of Total Revenue
Contributions $770
0.3%
Program Services $243,476
99.7%
Investment Income $0
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $6,680
Total Liabilities $0
Net Assets $6,680
Compensation
Key Employees and Officers Compensation Related Other
Mark Kasimatis (President) $0 $0 $0
David Isaacs (Vice President) $0 $0 $0
Michael Addison (Secretary) $0 $0 $0
Daniel Martinez (Treasurer) $0 $0 $0
Lawrence Calder (Member At Large) $0 $0 $0
Doug Ronney (Member At Large) $0 $0 $0
+ View more people

Document Links

990
Filed on Dec. 26, 2023

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Nov.
2022

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$186,820
Expenses
$188,011
Net Income
-$1,191
Net Assets
$5,602
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $186,060
99.6%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $5,602
Total Liabilities $0
Net Assets $5,602
Compensation
Key Employees and Officers Compensation Other
Daniel Martinez (Treasurer) $0 $0
Michael Addison (Secretary) $0 $0
David Isaacs (President) $0 $0
Mark Kasimatis (1st Vp) $0 $0
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Document Links

990-EZ
Filed on Dec. 8, 2022

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Nov.
2021

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$116,840
Expenses
$115,699
Net Income
$1,141
Net Assets
$6,793
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $116,200
99.5%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $6,793
Total Liabilities $0
Net Assets $6,793
Compensation
Key Employees and Officers Compensation Other
Daniel Martinez (Treasurer) $0 $0
David Isaacs (President) $0 $0
Mark Kasimatis (1st Vp) $0 $0
Michael Addison (Secretary) $0 $0
Larry Calder (Board Member At Large) $0 $0
+ View more people

Document Links

990-EZ
Filed on July 4, 2022

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending April
2020

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$140,168
Expenses
$137,380
Net Income
$2,788
Net Assets
$4,799
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $139,448
99.5%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $4,799
Total Liabilities $0
Net Assets $4,799

No Document Links

The IRS has provided extracted financial data for this filing, but has not yet released the source documents.

Fiscal Year Ending April
2019

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$154,398
Expenses
$152,671
Net Income
$1,727
Net Assets
$2,011
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $153,718
99.6%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $2,011
Total Liabilities $0
Net Assets $2,011

No Document Links

The IRS has provided extracted financial data for this filing, but has not yet released the source documents.

Fiscal Year Ending April
2017

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$197,120
Expenses
$197,085
Net Income
$35
Net Assets
$284
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $196,170
99.5%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $284
Total Liabilities $0
Net Assets $284

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2016

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$232,177
Expenses
$231,997
Net Income
$180
Net Assets
$249
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $231,097
99.5%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $249
Total Liabilities $0
Net Assets $249

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2015

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$169,945
Expenses
$170,190
Net Income
-$245
Net Assets
$69
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $169,315
99.6%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $69
Total Liabilities $0
Net Assets $69

No Document Links

The IRS has provided extracted financial data for this filing, but has not yet released the source documents.

Fiscal Year Ending Dec.
2014

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2014

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$149,650
Expenses
$149,674
Net Income
-$24
Net Assets
$314
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $148,620
99.3%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $314
Total Liabilities $0
Net Assets $314

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2013

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$155,314
Expenses
$155,333
Net Income
-$19
Net Assets
$338
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $154,164
99.3%
Investment Income $900
0.6%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $250
0.2%
Assets/Debt
Total Assets $338
Total Liabilities $0
Net Assets $338

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2012

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$170,199
Expenses
$169,780
Net Income
$419
Net Assets
$357
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $169,058
99.3%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $241
0.1%
Assets/Debt
Total Assets $357
Total Liabilities $0
Net Assets $357

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2011

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2009

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2008

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2008

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2007

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2006

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2005

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

About This Data

What Is This Data?

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Every organization that has been recognized as tax exempt by the IRS has to file Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

  • Raw filing data. Includes EINs and summary financials as structured data.
  • Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
  • Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica. Bulk PDF downloads since 2017 are available from the IRS.
  • Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
  • Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

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About Nonprofit Explorer

Nonprofit Explorer

Browse millions of annual returns filed by tax-exempt organizations with ProPublica’s Nonprofit Explorer. See details like executive compensation, revenue, expenses and more. Search for an organization or a person, or search the full text of filings.

By Andrea Suozzo, Alec Glassford, Ash Ngu and Brandon Roberts.

Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

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