Proof School
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 / Secondary, High School (NTEE)
Donations to this organization are tax deductible.
Details
According to its June 2023 tax filing, this nonprofit:
Summary charts: organization finances over time
Revenue $6.53M (2023)
Expenses $5.82M (2023)
Total Assets $10.1M (2023)
Total Liabilities $4.89M (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 June
2023
Extracted Financial Data
Extracted Financial Data from Form 990
| Notable Sources of Revenue | Percent of Total Revenue | |
|---|---|---|
| Contributions | $803,818 |
12.3%
|
| Program Services | $5,642,079 |
86.4%
|
| Investment Income | $81,322 |
1.2%
|
| Bond Proceeds | $0 | |
| Royalties | $0 | |
| Rental Property Income | $0 | |
| Net Fundraising | $0 | |
| Sales of Assets | $1,213 |
0.0%
|
| Net Inventory Sales | $0 | |
| Other Revenue | $1,804 |
0.0%
|
| Notable Expenses | Percent of Total Expenses | |
|---|---|---|
| Executive Compensation | $800,960 |
13.8%
|
| Professional Fundraising Fees | $0 | |
| Other Salaries and Wages | $1,847,272 |
31.7%
|
| Assets/Debt | ||
|---|---|---|
| Total Assets | $10,068,626 | |
| Total Liabilities | $4,885,422 |
Other
Compensation
| Key Employees and Officers | Compensation | Related | Other |
|---|---|---|---|
| Samuel Vandervelde (Head Of School) | $244,080 | $0 | $43,660 |
| Kathy Lin (Director Of Admissions) | $219,974 | $0 | $11,926 |
| Zachary Sifuentes (Dean Of Humanities) | $210,489 | $0 | $36,264 |
Document Links
990
Filed on May 13, 2024Primary tax return for a nonprofit’s activities, finances, and governance
Fiscal Year Ending June
2022
Extracted Financial Data
Extracted Financial Data from Form 990
| Notable Sources of Revenue | Percent of Total Revenue | |
|---|---|---|
| Contributions | $859,268 |
13.5%
|
| Program Services | $5,512,773 |
86.5%
|
| Investment Income | $1,408 |
0.0%
|
| Bond Proceeds | $0 | |
| Royalties | $0 | |
| Rental Property Income | $0 | |
| Net Fundraising | $0 | |
| Sales of Assets | $0 | |
| Net Inventory Sales | $0 | |
| Other Revenue | $2,597 |
0.0%
|
| Notable Expenses | Percent of Total Expenses | |
|---|---|---|
| Executive Compensation | $758,812 |
12.9%
|
| Professional Fundraising Fees | $0 | |
| Other Salaries and Wages | $1,800,318 |
30.6%
|
| Assets/Debt | ||
|---|---|---|
| Total Assets | $9,200,704 | |
| Total Liabilities | $4,728,396 |
Other
Compensation
| Key Employees and Officers | Compensation | Related | Other |
|---|---|---|---|
| Samuel Vandervelde (Head Of School) | $236,178 | $0 | $36,932 |
| Kathy Lin (Director Of Admissions) | $210,846 | $0 | $7,135 |
| Zachary Sifuentes (Dean Of Humanities) | $201,981 | $0 | $30,579 |
Document Links
990
Filed on May 24, 2023Primary tax return for a nonprofit’s activities, finances, and governance
Fiscal Year Ending June
2021
Extracted Financial Data
Extracted Financial Data from Form 990
| Notable Sources of Revenue | Percent of Total Revenue | |
|---|---|---|
| Contributions | $1,031,457 |
16.7%
|
| Program Services | $5,139,423 |
83.3%
|
| Investment Income | $289 |
0.0%
|
| 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 | $718,862 |
13.6%
|
| Professional Fundraising Fees | $0 | |
| Other Salaries and Wages | $1,635,667 |
30.9%
|
| Assets/Debt | ||
|---|---|---|
| Total Assets | $8,538,948 | |
| Total Liabilities | $4,558,270 |
Other
Compensation
| Key Employees and Officers | Compensation | Related | Other |
|---|---|---|---|
| Samuel K Vandervelde (Head Of School) | $225,899 | $0 | $34,964 |
| Kathy Lin (Director Of Admissions) | $199,063 | $0 | $6,787 |
| Zachary Sifuentes (Dean Of Humanities) | $191,331 | $0 | $29,260 |
Document Links
990
Filed on May 11, 2022Primary tax return for a nonprofit’s activities, finances, and governance
Fiscal Year Ending June
2020
Extracted Financial Data
Extracted Financial Data from Form 990
| Notable Sources of Revenue | Percent of Total Revenue | |
|---|---|---|
| Contributions | $614,908 |
11.6%
|
| Program Services | $4,682,369 |
88.2%
|
| Investment Income | $7,852 |
0.1%
|
| Bond Proceeds | $0 | |
| Royalties | $0 | |
| Rental Property Income | $0 | |
| Net Fundraising | $0 | |
| Sales of Assets | $0 | |
| Net Inventory Sales | $0 | |
| Other Revenue | $2,782 |
0.1%
|
| Notable Expenses | Percent of Total Expenses | |
|---|---|---|
| Executive Compensation | $688,500 |
14.0%
|
| Professional Fundraising Fees | $0 | |
| Other Salaries and Wages | $1,433,629 |
29.1%
|
| Assets/Debt | ||
|---|---|---|
| Total Assets | $7,842,960 | |
| Total Liabilities | $4,738,950 |
Other
Compensation
| Key Employees and Officers | Compensation | Related | Other |
|---|---|---|---|
| Samuel K Vandervelde (Head Of School) | $219,773 | $0 | $33,509 |
| Kathy Lin (Director Of Admissions) | $189,051 | $0 | $6,356 |
| Zachary Sifuentes (Dean Of Humanities) | $183,316 | $0 | $27,334 |
Document Links
990
Filed on April 21, 2021Primary tax return for a nonprofit’s activities, finances, and governance
Fiscal Year Ending June
2019
Extracted Financial Data
Extracted Financial Data from Form 990
| Notable Sources of Revenue | Percent of Total Revenue | |
|---|---|---|
| Contributions | $914,708 |
18.8%
|
| Program Services | $3,941,336 |
81.0%
|
| Investment Income | $9,556 |
0.2%
|
| 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 | $576,276 |
12.7%
|
| Professional Fundraising Fees | $0 | |
| Other Salaries and Wages | $1,111,975 |
24.5%
|
| Assets/Debt | ||
|---|---|---|
| Total Assets | $6,992,457 | |
| Total Liabilities | $4,263,028 |
Other
Compensation
| Key Employees and Officers | Compensation | Related | Other |
|---|---|---|---|
| Samuel K Vandervelde (Head Of School) | $179,957 | $0 | $29,895 |
| Zachary Sifuentes (Dean Of Humanities) | $174,752 | $0 | $24,400 |
| Kathy Lin (Director Of Admissions) | $161,794 | $0 | $5,478 |
Document Links
990
Filed on July 11, 2020Primary tax return for a nonprofit’s activities, finances, and governance
990-T
For unrelated business income from activities not substantially related to the organization's tax-exempt purpose
Fiscal Year Ending June
2018
Extracted Financial Data
Extracted Financial Data from Form 990
| Notable Sources of Revenue | Percent of Total Revenue | |
|---|---|---|
| Contributions | $1,054,733 |
26.0%
|
| Program Services | $3,004,551 |
73.9%
|
| Investment Income | $4,011 |
0.1%
|
| 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 | $492,277 |
13.7%
|
| Professional Fundraising Fees | $0 | |
| Other Salaries and Wages | $822,374 |
22.8%
|
| Assets/Debt | ||
|---|---|---|
| Total Assets | $5,943,386 | |
| Total Liabilities | $3,420,889 |
Other
Compensation
| Key Employees and Officers | Compensation | Related | Other |
|---|---|---|---|
| Zachary Sifuentes (Dean Of Humanities) | $169,740 | $0 | $16,875 |
| Samuel K Vandervelde (Head Of School) | $155,589 | $0 | $18,780 |
| Yeuwhai Lin (Director Of Admissions) | $127,447 | $0 | $3,846 |
Document Links
990
Filed on April 30, 2019Primary tax return for a nonprofit’s activities, finances, and governance
Fiscal Year Ending June
2017
Extracted Financial Data
Extracted Financial Data from Form 990
| Notable Sources of Revenue | Percent of Total Revenue | |
|---|---|---|
| Contributions | $2,071,279 |
49.3%
|
| Program Services | $2,126,842 |
50.6%
|
| Investment Income | $1,613 |
0.0%
|
| Bond Proceeds | $0 | |
| Royalties | $0 | |
| Rental Property Income | $0 | |
| Net Fundraising | $0 | |
| Sales of Assets | $0 | |
| Net Inventory Sales | $0 | |
| Other Revenue | $220 |
0.0%
|
| Notable Expenses | Percent of Total Expenses | |
|---|---|---|
| Executive Compensation | $452,211 |
17.2%
|
| Professional Fundraising Fees | $0 | |
| Other Salaries and Wages | $656,553 |
24.9%
|
| Assets/Debt | ||
|---|---|---|
| Total Assets | $4,603,635 | |
| Total Liabilities | $2,539,191 |
Other
Compensation
| Key Employees and Officers | Compensation | Related | Other |
|---|---|---|---|
| Zachary Sifuentes (Dean Of Humanities) | $155,493 | $0 | $12,400 |
| Samuel K Vandervelde (Head Of School) | $153,799 | $0 | $14,654 |
| Paul Zeitz (Board Chair) | $0 | $0 | $0 |
Document Links
990
Filed on May 14, 2018Primary tax return for a nonprofit’s activities, finances, and governance
Fiscal Year Ending June
2016
Extracted Financial Data
Extracted Financial Data from Form 990
| Notable Sources of Revenue | Percent of Total Revenue | |
|---|---|---|
| Contributions | $611,368 |
28.6%
|
| Program Services | $1,502,361 |
70.3%
|
| Investment Income | $247 |
0.0%
|
| Bond Proceeds | $0 | |
| Royalties | $0 | |
| Rental Property Income | $0 | |
| Net Fundraising | $0 | |
| Sales of Assets | -$327 | |
| Net Inventory Sales | $0 | |
| Other Revenue | $23,862 |
1.1%
|
| Notable Expenses | Percent of Total Expenses | |
|---|---|---|
| Executive Compensation | $286,346 |
13.2%
|
| Professional Fundraising Fees | $0 | |
| Other Salaries and Wages | $584,148 |
26.9%
|
| Assets/Debt | ||
|---|---|---|
| Total Assets | $1,354,929 | |
| Total Liabilities | $935,991 |
Other
Compensation
| Key Employees and Officers | Compensation | Related | Other |
|---|---|---|---|
| Zachary Sifuentes (Dean Of Humanities) | $155,493 | $0 | $4,607 |
| Samuel K Vandervelde (Head Of School) | $153,799 | $0 | $5,113 |
| Paul Zeitz (Board Chair) | $0 | $0 | $0 |
Document Links
990
Filed on May 15, 2017Primary tax return for a nonprofit’s activities, finances, and governance
Fiscal Year Ending June
2015
Extracted Financial Data
Extracted Financial Data from Form 990
| Notable Sources of Revenue | Percent of Total Revenue | |
|---|---|---|
| Contributions | $715,840 |
100.0%
|
| Program Services | $0 | |
| Investment Income | $69 |
0.0%
|
| 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 | $42,906 |
16.4%
|
| Assets/Debt | ||
|---|---|---|
| Total Assets | $1,508,229 | |
| Total Liabilities | $1,050,931 |
Other
Compensation
| Key Employees and Officers | Compensation | Related | Other |
|---|---|---|---|
| Zachary Sifuentes (Dean Of Humanities) | $83,947 | $0 | $0 |
| Samuel K Vandervelde (Head Of School) | $59,781 | $0 | $0 |
| Kathy Lin (Director Of Community Outreach) | $43,531 | $0 | $0 |
Document Links
990
Filed on May 11, 2016Primary tax return for a nonprofit’s activities, finances, and governance
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.