Liabilities / Assets
82nd percentile
Higher debt load relative to assets than 82% of similar nonprofits.
Precomputed percentiles for this filing year versus similar nonprofits in the same peer cohort.
Liabilities / Assets
82nd percentile
Higher debt load relative to assets than 82% of similar nonprofits.
Liabilities / Revenue
80th percentile
Higher debt load relative to revenue than 80% of similar nonprofits.
Net Margin
87th percentile
Higher net margin than 87% of similar nonprofits.
Top Officer Pay
Score unavailable
This filing does not contain officer compensation rows.
Asset Growth
98th percentile
Faster asset growth than 98% of similar nonprofits.
Revenue Growth
92nd percentile
Faster revenue growth than 92% of similar nonprofits.
Assets
Up$4,603,635
Up $3,248,706 (+240%) from 2016
Net Assets
Up$2,064,444
Up $1,645,506 (+393%) from 2016
Liabilities
Up$2,539,191
Up $1,603,200 (+171%) from 2016
Revenue
Up$4,199,954
Up $2,062,443 (+96%) from 2016
Expenses
Up$2,636,069
Up $461,041 (+21%) from 2016
Net Income
Up$1,563,885
Up $1,601,402 (+4268%) from 2016
Proof school offers a transformative liberal arts education to young people with an active curiosity and a passion for mathematics, equipping them to reason, communicate, and positively impact their world.
Offering a liberal arts education for kids who love math, reasoning and communication.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Rtn Earn Endowment Incm Other Fnds | $418,938 | $2,064,444 | ▲ $1,645,506 |
| Cash and Non-Interest-Bearing Accounts | $976,889 | $1,740,192 | ▲ $763,303 |
| Accounts Receivable | $0 | $1,337,055 | ▲ $1,337,055 |
| Land, Buildings, and Equipment, Net | $0 | $596,395 | ▲ $596,395 |
| Investments in Publicly Traded Securities | $113,665 | $259,433 | ▲ $145,768 |
| Prepaid Expenses and Deferred Charges | $264,375 | $60,560 | ▼ $203,815 |
| Pd in Cap Srpls Land Bldg Eqp Fund | $0 | $0 | → $0 |
| Cap Stk Tr Prin Current Funds | $0 | $0 | → $0 |
| Total Assets | $1,354,929 | $4,603,635 | ▲ $3,248,706 |
| Other Assets Total | $0 | $610,000 | ▲ $610,000 |
| Liabilities | |||
| Deferred Revenue | $765,269 | $2,317,413 | ▲ $1,552,144 |
| Other Liabilities | $72,224 | $163,244 | ▲ $91,020 |
| Accounts Payable and Accrued Expenses | $98,498 | $58,534 | ▼ $39,964 |
| Total Liabilities | $935,991 | $2,539,191 | ▲ $1,603,200 |
| Net Assets / Fund Balance | |||
| Total Net Assets Fund Balance | $418,938 | $2,064,444 | ▲ $1,645,506 |
| Total Liabilities and Net Assets / Fund Balance | $1,354,929 | $4,603,635 | ▲ $3,248,706 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Other Land Buildings | $596,395 | - | $596,395 |
| Other Assets Org | $610,000 | - | - |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Samuel K Vandervelde | Head of School | FT | $153,799 | $14,654 | $168,453 |
| Zachary Sifuentes | Dean of Humanities | FT | $155,493 | $12,400 | $167,893 |
| Name | Title |
|---|---|
| Paul Zeitz | Board Chair |
| Alon Amit | Board Member |
| Diviya Magaro | Board Member |
| James Sotiros | Board Member |
| Perry Tam | Board Member |
| Ravi Vakil | Board Member |
| Dennis Leary | Treasurer |
| Contribution Type | Contribution Count | Reported Amount | Valuation Method |
|---|---|---|---|
| Securities Publicly Traded | 3 | $144,156 | Fair Market Value |
| Total Noncash Contributions | 3 | $144,156 | - |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $1,309,373 |
| Other Expenses | $834,371 |
| Grants and Similar Amounts Paid | $492,325 |
| Total Fundraising Expense | $1,925 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $609,743 | $46,810 | - | $656,553 |
| Occupancy | $523,239 | $116,909 | - | $640,148 |
| Grants to Domestic Individuals | $492,325 | - | - | $492,325 |
| Current Officers, Directors, Trustees, and Key Employees | $452,211 | - | - | $452,211 |
| Other Employee Benefits | $108,642 | $5,537 | - | $114,179 |
| Payroll Taxes | $83,488 | $2,942 | - | $86,430 |
| Insurance | $20,419 | $14,966 | - | $35,385 |
| Fees for Services Accounting | - | $24,188 | - | $24,188 |
| Fees for Services Legal | - | $19,356 | - | $19,356 |
| Information Technology | $17,248 | - | - | $17,248 |
| Office Expenses | $5,625 | $3,927 | - | $9,552 |
| Fees for Services Other | $1,725 | $7,818 | - | $9,543 |
| Conferences and Meetings | $2,359 | - | - | $2,359 |
| Advertising | - | - | $1,925 | $1,925 |
| All Other Expenses | $969 | - | - | $969 |
| Other Expenses | $398 | - | - | $398 |
| Total Functional Expenses | $2,391,691 | $242,453 | $1,925 | $2,636,069 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Liability | Amount |
|---|---|
| Deferred Rent | $163,244 |
“The school will electronically distribute the completed form 990, including any supplemental schedules, to each member of the board of directors (named in part vii section a) before filing. The board will then approve the form 990 via a formal vote.”
“All employees of proof school sign an agreement to observe the conflict of interest policy stated in our employee handbook. Determination and review of conflicts of interest are made by the school leadership team, overseen by the head of school. Such determinations are made initially at the time of hire, and subsequently monitored through an annual review of handbook policies each august, requests for personal time during the year, and informal conversations. No conflicts of interest have been identified to date.”
“Non-compensated board approves all senior leadership team salaries. The school leadership team sets and publishes internally a compensation scale and promotion policy for all employees. Amounts are based on salaries at comparison schools in our region.”
“Documents may be requested by contacting the head of school, who makes decisions regarding their distribution on a case-by-case basis.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 98498 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 58534 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 0 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 1337055 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | OFFERING A LIBERAL ARTS EDUCATION FOR KIDS WHO LOVE MATH, REASONING AND COMMUNICATION. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 1925 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 1925 |
| IRS990/AllOtherContributionsAmt | 0 | 2071279 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 969 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 969 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | SAMUEL K VANDERVELDE |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4156243910 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 555 POST STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | SAN FRANCISCO |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94102 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CapStkTrPrinCurrentFundsGrp/BOYAmt | 0 | 0 |
| IRS990/CapStkTrPrinCurrentFundsGrp/EOYAmt | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 976889 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 1740192 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 452211 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 452211 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 2359 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 2359 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 2071279 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 492325 |
| IRS990/CYInvestmentIncomeAmt | 0 | 1613 |
| IRS990/CYOtherExpensesAmt | 0 | 834371 |
| IRS990/CYOtherRevenueAmt | 0 | 220 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 2126842 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 1563885 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 1309373 |
| IRS990/CYTotalExpensesAmt | 0 | 2636069 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 1925 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 4199954 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 765269 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 2317413 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | PROOF SCHOOL PROVIDES A COMPLETE LIBERAL ARTS EDUCATION FOR KIDS IN MIDDLE AND HIGH SCHOOL WHO LOVE MATH. DURING THE 2016-17 ACADEMIC/FISCAL YEAR THE SCHOOL ENROLLED 58 STUDENTS IN GRADES SIX THROUGH ELEVEN. THE SCHOOL EMPLOYED TEN FULL-TIME TEACHERS, THREE TEACHER-ADMINISTRATORS, ONE INTERN, ONE PART-YEAR TEACHER, AND ONE NON-ACADEMIC STAFF PERSON. PROOF SCHOOL PROVIDED SERVICES AND CONDUCTED OPERATIONS IN A MANNER COMMON TO MOST PRIVATE SCHOOLS. THIS INCLUDED TEACHING A FULL RANGE OF CLASSES, RUNNING ADMISSIONS, GENERATING TRANSCRIPTS, RAISING FUNDS, TRACKING ATTENDANCE, AND SO FORTH. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 16 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 2391691 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 24188 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 24188 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 19356 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 19356 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 7818 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 1725 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 9543 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 14654 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 12400 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | PAUL ZEITZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | DENNIS LEARY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | ALON AMIT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | DIVIYA MAGARO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | JAMES SOTIROS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | PERRY TAM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | RAVI VAKIL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | SAMUEL K VANDERVELDE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ZACHARY SIFUENTES |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 153799 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 155493 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | BOARD CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | DEAN OF HUMANITIES |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2013 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 8 |
| IRS990/GrantAmt | 0 | 492325 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 492325 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 492325 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 144156 |
| IRS990/GrossReceiptsAmt | 0 | 4344110 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 7 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 2 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 17248 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 17248 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 14966 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 20419 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 35385 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 1613 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 1613 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 113665 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 259433 |
| IRS990/IRPDocumentCnt | 0 | 9 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 0 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 0 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 596395 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 596395 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 144156 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | PROOF SCHOOL OFFERS A TRANSFORMATIVE LIBERAL ARTS EDUCATION TO YOUNG PEOPLE WITH AN ACTIVE CURIOSITY AND A PASSION FOR MATHEMATICS, EQUIPPING THEM TO REASON, COMMUNICATE, AND POSITIVELY IMPACT THEIR WORLD. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 418938 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 2064444 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoncashContributionsAmt | 0 | 144156 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 116909 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 523239 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 640148 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 3927 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 5625 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 9552 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 0 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 610000 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 5537 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 108642 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 114179 |
| IRS990/OtherExpensesGrp/Desc | 0 | SCHOOL PROGRAMS AND ACT |
| IRS990/OtherExpensesGrp/Desc | 1 | CURRICULAR EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 2 | ADMISSIONS & OUTREACH |
| IRS990/OtherExpensesGrp/Desc | 3 | RECRUITMENT |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 49291 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 16710 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 7299 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 398 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 49291 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 16710 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 7299 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 398 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 72224 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 163244 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 611710 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | FEE INCOME |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 220 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 220 |
| IRS990/OtherRevenueTotalAmt | 0 | 220 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 46810 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 609743 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 656553 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 2942 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 83488 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 86430 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/BOYAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 264375 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 60560 |
| IRS990/PrincipalOfficerNm | 0 | SAMUEL VANDERVELDE |
| IRS990/PriorPeriodAdjustmentsAmt | 0 | 81621 |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 611600 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 611710 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 2 | 611710 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | TUITION |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | LUNCH INCOME |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | PARENTS ASSOCIATION IN |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 2096140 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 29312 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 1390 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 2096140 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 29312 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 1390 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 611368 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 263337 |
| IRS990/PYInvestmentIncomeAmt | 0 | -80 |
| IRS990/PYOtherExpensesAmt | 0 | 900234 |
| IRS990/PYOtherRevenueAmt | 0 | 23862 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 1502361 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -37517 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 1011457 |
| IRS990/PYTotalExpensesAmt | 0 | 2175028 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 2137511 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 1563885 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 1 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 1 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 2127062 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 418938 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 2064444 |
| IRS990ScheduleA/SchoolInd | 0 | X |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 0 | 610000 |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 0 | SECURITY DEPOSITS |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 596395 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 596395 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 163244 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | DEFERRED RENT |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 596395 |
| IRS990ScheduleD/TotalBookValueOtherAssetsAmt | 0 | 610000 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 163244 |
| IRS990ScheduleE/ComplianceWithRevProc7550Ind | 0 | 1 |
| IRS990ScheduleE/DiscriminateRaceAdmissPlcyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceAthltProgInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceEducPlcyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceEmplmFcultyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceOtherActyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceSchsInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceStdntsRghtsInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceUseOfFcltsInd | 0 | 0 |
| IRS990ScheduleE/GovernmentFinancialAidRcvdInd | 0 | 0 |
| IRS990ScheduleE/GovernmentFinancialAidRvkdInd | 0 | 0 |
| IRS990ScheduleE/MaintainCpyOfAllSolInd | 0 | 1 |
| IRS990ScheduleE/MaintainCpyOfBrochuresEtcInd | 0 | 1 |
| IRS990ScheduleE/MaintainRacialCompRecsInd | 0 | 1 |
| IRS990ScheduleE/MaintainScholarshipsRecsInd | 0 | 1 |
| IRS990ScheduleE/NondiscriminatoryPolicyStmtInd | 0 | 1 |
| IRS990ScheduleE/PlcyPblczdViaBroadcastMediaInd | 0 | 0 |
| IRS990ScheduleE/PolicyStmtInBrochuresEtcInd | 0 | 1 |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 0 | PROOF SCHOOL DOES NOT SOLICIT APPLICATIONS VIA NEWSPAPER OR BROADCAST MEDIA. OUR COMPREHENSIVE RACIAL NONDISCRIMINATION POLICY APPEARS AT THE PROOF SCHOOL WEBSITE ON THE PAGE CONTAINING INFORMATION ON ADMISSIONS. IT IS ALSO CLEARLY DISPLAYED ON ALL APPLICATION MATERIALS THAT ARE COMPLETED BY FAMILIES IN THE PROCESS OF APPLYING TO PROOF SCHOOL. |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE E, PART I, LINE 3 |
| IRS990ScheduleI/GrantRecordsMaintainedInd | 0 | 1 |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/CashGrantAmt | 0 | 492325 |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/GrantTypeTxt | 0 | FINANCIAL ASSISTANCE |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/NonCashAssistanceDesc | 0 | FINANCIAL AID |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/RecipientCnt | 0 | 23 |
| IRS990ScheduleI/SupplementalInformationDetail/ExplanationTxt | 0 | ALL FAMILIES HAVE THE OPTION OF APPLYING FOR FINANCIAL ASSISTANCE (FA) AT THE SAME TIME THAT THEY APPLY FOR ADMISSION TO PROOF SCHOOL. THE FA PROCESS IS HANDLED BY SSS, AN INDEPENDENT SERVICE USED BY MANY SCHOOLS TO DETERMINE FINANCIAL ASSISTANCE AWARD AMOUNTS. ONCE A STUDENT IS ADMITTED, OUR FA COMMITTEE USES INFORMATION PROVIDED BY SSS AND BY THE FAMILY IN ORDER TO MAKE FINAL AWARD DETERMINATIONS, WHICH ARE SHARED IN THE ENROLLMENT AGREEMENT. ALL RECORDS RELATED TO FA ARE KEPT ELECTRONICALLY, BOTH VIA SSS AND INTERNALLY. |
| IRS990ScheduleI/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART I, LINE 2: |
| IRS990ScheduleJ/AnyNonFixedPaymentsInd | 0 | 0 |
| IRS990ScheduleJ/BoardOrCommitteeApprovalInd | 0 | X |
| IRS990ScheduleJ/CompBasedOnRevenueOfFlngOrgInd | 0 | 0 |
| IRS990ScheduleJ/CompBsdNetEarnsFlngOrgInd | 0 | 0 |
| IRS990ScheduleJ/CompBsdNetEarnsRltdOrgsInd | 0 | 0 |
| IRS990ScheduleJ/CompBsdOnRevRelatedOrgsInd | 0 | 0 |
| IRS990ScheduleJ/CompensationSurveyInd | 0 | X |
| IRS990ScheduleJ/EquityBasedCompArrngmInd | 0 | 0 |
| IRS990ScheduleJ/InitialContractExceptionInd | 0 | 0 |
| IRS990/ScheduleJRequiredInd | 0 | 1 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 0 | 153799 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 1 | 155493 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusFilingOrganizationAmount | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusFilingOrganizationAmount | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusRelatedOrganizationsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusRelatedOrganizationsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompensationBasedOnRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompensationBasedOnRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990FilingOrgAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990FilingOrgAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990RltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990RltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompensationFlngOrgAmt | 0 | 1745 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompensationFlngOrgAmt | 1 | 1745 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsFilingOrgAmt | 0 | 12909 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsFilingOrgAmt | 1 | 10655 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationFilingOrgAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationFilingOrgAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm | 0 | SAMUEL K VANDERVELDE |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm | 1 | ZACHARY SIFUENTES |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt | 0 | HEAD OF SCHOOL |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt | 1 | DEAN OF HUMANITIES |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt | 0 | 168453 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt | 1 | 167893 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/SeverancePaymentInd | 0 | 0 |
| IRS990ScheduleJ/SupplementalNonqualRtrPlanInd | 0 | 0 |
| IRS990ScheduleM/AnyPropertyThatMustBeHeldInd | 0 | 0 |
| IRS990ScheduleM/Form8283ReceivedCnt | 0 | 0 |
| IRS990ScheduleM/ReviewProcessUnusualNCGiftsInd | 0 | 1 |
| IRS990ScheduleM/SecuritiesPubliclyTradedGrp/ContributionCnt | 0 | 3 |
| IRS990ScheduleM/SecuritiesPubliclyTradedGrp/MethodOfDeterminingRevenuesTxt | 0 | FAIR MARKET VALUE |
| IRS990ScheduleM/SecuritiesPubliclyTradedGrp/NonCashCheckboxInd | 0 | X |
| IRS990ScheduleM/SecuritiesPubliclyTradedGrp/NoncashContributionsRptF990Amt | 0 | 144156 |
| IRS990ScheduleM/SupplementalInformationDetail/ExplanationTxt | 0 | THIS COLUMN REPRESENTS THE NUMBER OF CONTRIBUTORS, NOT THE NUMBER OF ITEMS CONTRIBUTED. |
| IRS990ScheduleM/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART I, COLUMN (B): |
| IRS990ScheduleM/ThirdPartiesUsedInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE SCHOOL WILL ELECTRONICALLY DISTRIBUTE THE COMPLETED FORM 990, INCLUDING ANY SUPPLEMENTAL SCHEDULES, TO EACH MEMBER OF THE BOARD OF DIRECTORS (NAMED IN PART VII SECTION A) BEFORE FILING. THE BOARD WILL THEN APPROVE THE FORM 990 VIA A FORMAL VOTE. |
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Displayed year
2017 • Form 990Detailed filing. Detailed filing data is available for this year.