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Mathematical Staircase

  • Chicopee, MA
  • Tax-exempt since May 2013
  • EIN: 46-1813949

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.

Category: Educational Institutions and Related Activities / Educational Services and Schools - Other (NTEE)

Donations to this organization are tax deductible.

Details

According to its Dec. 2023 tax filing, this nonprofit:

Reported conflict of interest transactions
Organizations must report loans, grants or business transactions with interested parties, which may include key employees and officers, their family members and any businesses in which they hold a controlling interest. These transactions must be reported on Schedule L.

Summary charts: organization finances over time

Revenue
$547k (2023)

Expenses
$511k (2023)

Total Assets
$244k (2023)

Total Liabilities
$3.49k (2023)

Source: Form 990 tax filings from 2013 to 2023

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 Dec.
2023

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$546,979
Expenses
$510,552
Net Income
$36,427
Net Assets
$240,390
Notable Sources of Revenue Percent of Total Revenue
Contributions $187,273
34.2%
Program Services $356,348
65.1%
Investment Income $3,094
0.6%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $264
0.0%
Notable Expenses Percent of Total Expenses
Executive Compensation $47,147
9.2%
Professional Fundraising Fees $0
Other Salaries and Wages $23,465
4.6%
Assets/Debt
Total Assets $243,882
Total Liabilities $3,492
Net Assets $240,390
Other
Reported conflict of interest transactions
Compensation
Key Employees and Officers Compensation Related Other
Sarah Marie Belcastro Ph D (President And Chair Of The Board) $44,098 $0 $0
Emily Peters Ph D (Director) $3,049 $0 $0
Hannah Alpert Ph D (Clerk And Secretary Of The Board) $0 $0 $0
Joan Belcastro (Treasurer) $0 $0 $0
Joshua Greene Ph D (Director) $0 $0 $0
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Document Links

990
Filed on May 13, 2024

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

View Filing
XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$494,874
Expenses
$524,293
Net Income
-$29,419
Net Assets
$196,006
Notable Sources of Revenue Percent of Total Revenue
Contributions $143,485
29.0%
Program Services $351,389
71.0%
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 $43,442
8.3%
Professional Fundraising Fees $0
Other Salaries and Wages $21,374
4.1%
Assets/Debt
Total Assets $196,006
Total Liabilities $0
Net Assets $196,006
Other
Reported conflict of interest transactions
Compensation
Key Employees and Officers Compensation Related Other
Sarah Marie Belcastro Ph D (President And Chair Of The Board) $39,114 $0 $0
Hannah Alpert Ph D (Clerk And Secretary Of The Board) $4,328 $0 $0
Emily Peters Ph D (Director) $0 $0 $0
Joan Belcastro (Treasurer) $0 $0 $0
Joshua Greene Ph D (Director) $0 $0 $0
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Document Links

990
Filed on April 18, 2023

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$222,817
Expenses
$152,251
Net Income
$70,566
Net Assets
$225,405
Notable Sources of Revenue Percent of Total Revenue
Contributions $65,998
29.6%
Program Services $156,819
70.4%
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 $40,311
26.5%
Professional Fundraising Fees $0
Other Salaries and Wages $18,029
11.8%
Assets/Debt
Total Assets $225,405
Total Liabilities $0
Net Assets $225,405
Other
Reported conflict of interest transactions
Compensation
Key Employees and Officers Compensation Related Other
Sarah Marie Belcastro Ph D (President And Chair Of The Board) $35,596 $0 $0
Hannah Alpert Ph D (Clerk And Secretary Of The Board) $4,244 $0 $0
Emily Peters Ph D (Director) $472 $0 $0
Joan Belcastro (Treasurer) $0 $0 $0
Joshua Greene Phd (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on April 21, 2022

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

View Filing
XML

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$217,499
Expenses
$150,203
Net Income
$67,296
Net Assets
$154,909
Notable Sources of Revenue Percent of Total Revenue
Contributions $53,374
24.5%
Program Services $142,125
65.3%
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 $22,000
10.1%
Notable Expenses Percent of Total Expenses
Executive Compensation $36,346
24.2%
Professional Fundraising Fees $0
Other Salaries and Wages $23,292
15.5%
Assets/Debt
Total Assets $154,909
Total Liabilities $0
Net Assets $154,909
Other
Reported conflict of interest transactions
Compensation
Key Employees and Officers Compensation Related Other
Sarah Marie Belcastro Ph D (President And Chair Of The Board) $29,648 $0 $0
Hannah Alpert Ph D (Clerk And Secretary Of The Board) $5,530 $0 $0
Emily Peters Ph D (Director) $943 $0 $0
Joan Belcastro (Treasurer) $0 $0 $0
Joshua Greene Phd (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on April 15, 2021

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$344,933
Expenses
$356,324
Net Income
-$11,391
Net Assets
$87,611
Notable Sources of Revenue Percent of Total Revenue
Contributions $68,530
19.9%
Program Services $276,403
80.1%
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 $29,165
8.2%
Professional Fundraising Fees $0
Other Salaries and Wages $17,275
4.8%
Assets/Debt
Total Assets $87,611
Total Liabilities $0
Net Assets $87,611

Document Links

990

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

PDF

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$321,683
Expenses
$312,175
Net Income
$9,508
Net Assets
$99,015
Notable Sources of Revenue Percent of Total Revenue
Contributions $17,204
5.3%
Program Services $304,479
94.7%
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 $24,397
7.8%
Professional Fundraising Fees $0
Other Salaries and Wages $14,477
4.6%
Assets/Debt
Total Assets $99,015
Total Liabilities $0
Net Assets $99,015

Document Links

990

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

PDF

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$276,279
Expenses
$277,638
Net Income
-$1,359
Net Assets
$89,507
Notable Sources of Revenue Percent of Total Revenue
Contributions $21,735
7.9%
Program Services $254,544
92.1%
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 $32,467
11.7%
Professional Fundraising Fees $0
Other Salaries and Wages $12,279
4.4%
Assets/Debt
Total Assets $89,507
Total Liabilities $0
Net Assets $89,507

Document Links

990

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

PDF

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$230,389
Expenses
$213,091
Net Income
$17,298
Net Assets
$90,865
Notable Sources of Revenue Percent of Total Revenue
Contributions $21,301
9.2%
Program Services $209,088
90.8%
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 $27,150
12.7%
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $90,865
Total Liabilities $0
Net Assets $90,865

Document Links

990

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

PDF

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$179,335
Expenses
$153,744
Net Income
$25,591
Net Assets
$73,550
Notable Sources of Revenue Percent of Total Revenue
Contributions $12,412
6.9%
Program Services $166,923
93.1%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $73,550
Total Liabilities $0
Net Assets $73,550

Document Links

990-EZ

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

PDF

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$119,853
Expenses
$93,399
Net Income
$26,454
Net Assets
$47,959
Notable Sources of Revenue Percent of Total Revenue
Contributions $14,789
12.3%
Program Services $105,064
87.7%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $47,959
Total Liabilities $0
Net Assets $47,959

Document Links

990-EZ

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

PDF

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$91,195
Expenses
$71,690
Net Income
$19,505
Net Assets
$21,505
Notable Sources of Revenue Percent of Total Revenue
Contributions $16,200
17.8%
Program Services $74,995
82.2%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $21,505
Total Liabilities $0
Net Assets $21,505

Document Links

990-EZ

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

PDF

About 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.

API

The data powering this website is available programmatically, via an API. Read the API documentation »

Byline

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