Liabilities / Assets
59th percentile
Tied with the lowest-debt nonprofits in its peer group.
EIN 76-0660576 • 501(c)3 • Long Beach, CA
Profile
The Society exists to promote the legacy of Robert A. Heinlein by encouraging the reading and discussion of his written work, the use of critical thinking skills in our daily lives, and a love of science essential in promoting humankind's future beyond our home planet. We will "Pay it Forward" through support of educational, literary, and charitable endeavors including, but not limited to: volunteer blood drives; scholarships; the Heinlein For Heroes book distribution program; and the creation and distribution of teaching materials, including support of The Heinlein Journal.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
59th percentile
Tied with the lowest-debt nonprofits in its peer group.
Liabilities / Revenue
61st percentile
Tied with the lowest-debt nonprofits in its peer group.
Net Margin
39th percentile
Higher net margin than 39% of similar nonprofits.
Top Officer Pay
84th percentile
Higher top officer pay than 84% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
77th percentile
Faster asset growth than 77% of similar nonprofits.
Revenue Growth
34th percentile
Faster revenue growth than 34% of similar nonprofits.
Assets
Up$254,692
Up $33,451 (+15%) from 2024
Liabilities
Flat$0
Flat from 2024
Net Assets
Up$254,692
Up $33,451 (+15%) from 2024
Revenue
Down$42,368
Down $526 (-1.2%) from 2024
Expenses
Down$43,673
Down $11,044 (-20%) from 2024
Net Income
Up-$1,305
Up $10,518 (+89%) from 2024
Most recent year
2025 • Form 990EZDetailed filing. Detailed filing data is available for this year.
The Society exists to promote the legacy of Robert A. Heinlein by encouraging the reading and discussion of his written work, the use of critical thinking skills in our daily lives, and a love of science essential in promoting humankind's future beyond our home planet. We will "Pay it Forward" through support of educational, literary, and charitable endeavors including, but not limited to: volunteer blood drives; scholarships; the Heinlein For Heroes book distribution program; and the creation and distribution of teaching materials, including support of The Heinlein Journal.
| Description | Grants | Expenses |
|---|---|---|
| Scholarships. $4,000 per recipient in a one-time award, four recipients given each year. For undergraduates (non-freshman) whose major is in a STEM field of study. We had 289 applicants for the scholarships. Our other expense for scholarships is a subscription to AI software that checks submitted essays for nonhuman writing. | $16,000 | $392 |
| Heinlein for Heroes book distribution to active duty military, veterans, and their families.7,124 books donated in 376 shipments. These are usually sent to units or families and shared, so it's difficult to estimate how many actually read the books sent. | $0 | $13,719 |
| Support of volunteer blood donation. We provide resources to have blood drives at conventions and, since the COVID pandemic, donation in the local community which we record as a virtual drive. We recorded 5,813 blood donations. These can serve a variable number of people depending on the ultimate use of the blood product, which we are not told. | $0 | $1,675 |
| The Heinlein Society co-sponsors the Robert A. Heinlein Award, awarded each year at the Balticon held by the Baltimore Science Fiction Society, another 501(c)3. The award is given to someone in the field of Science Fiction who has demonstrated outstanding published works in science fiction and/or technical writings to inspire the human exploration of space. We provide a grant for up to half of the expenses incurred by the Award program. | $911 | $0 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| John Tilden | Treasurer & Operations Committees Chair | PT | $0 | - | - |
| Ken Walters | President, Public Relations Committees Chair | PT | $0 | - | - |
| Beatrice Kondo | Director | - | $0 | - | - |
| Mike Sheffield | Director, Chair Of Scholarship Committee | - | $0 | - | - |
| Walt Boyes | Vice-President, Board Of Advisors Liason | - | $0 | - | - |
| Joel Davis | Secretary | - | $0 | - | - |
| Joe Smiddie-Brush | Blood Drives Committee Chair | - | $0 | - | - |
| John Seltzer | Director, Heinlein For Heroes Committee Chair | PT | $0 | - | - |
| James Dutton | Director, Membership Services Chair | - | $0 | - | - |
“4 $4000 ($16,000) STEM scholarships granted plus $392 for software that checks for AI essays. Heinlein Award expenses--1/2 actual amount granted to Baltimore Science Fiction Society--$991”
“Description;Amount^Blood Drives;1675|Conventions;645|Heinlein for Heroes;13719|Operations;5628|PayPal Fees;740^Total;22407^”
“Fidelity Investment Fund returns added to balances”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990EZ/ActivitiesNotPreviouslyRptInd | 0 | 0 |
| IRS990EZ/BenefitsPaidToOrForMembersAmt | 0 | 0 |
| IRS990EZ/BooksInCareOfDetail/PersonNm | 0 | John Tilden |
| IRS990EZ/BooksInCareOfDetail/PhoneNum | 0 | 4109033196 |
| IRS990EZ/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 3553 Atlantic Avenue suite 341 |
| IRS990EZ/BooksInCareOfDetail/USAddress/CityNm | 0 | Long Beach |
| IRS990EZ/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990EZ/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 908075606 |
| IRS990EZ/CashSavingsAndInvestmentsGrp/BOYAmt | 0 | 221192 |
| IRS990EZ/CashSavingsAndInvestmentsGrp/EOYAmt | 0 | 254692 |
| IRS990EZ/ChgMadeToOrgnzngDocNotRptInd | 0 | 0 |
| IRS990EZ/ContributionsGiftsGrantsEtcAmt | 0 | 15505 |
| IRS990EZ/CostOfGoodsSoldAmt | 0 | 0 |
| IRS990EZ/CostOrOtherBasisExpenseSaleAmt | 0 | 0 |
| IRS990EZ/DirectIndirectPltclExpendAmt | 0 | 0 |
| IRS990EZ/DonorAdvisedFndsInd | 0 | 0 |
| IRS990EZ/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990EZ/ExcessOrDeficitForYearAmt | 0 | -1305 |
| IRS990EZ/FeesAndOtherPymtToIndCntrctAmt | 0 | 0 |
| IRS990EZ/FiledScheduleAInd | 0 | 1 |
| IRS990EZ/ForeignFinancialAccountInd | 0 | 0 |
| IRS990EZ/ForeignOfficeInd | 0 | 0 |
| IRS990EZ/Form1120PolFiledInd | 0 | 0 |
| IRS990EZ/Form990TotalAssetsGrp/BOYAmt | 0 | 221241 |
| IRS990EZ/Form990TotalAssetsGrp/EOYAmt | 0 | 254692 |
| IRS990EZ/FundraisingGrossIncomeAmt | 0 | 0 |
| IRS990EZ/GainOrLossFromSaleOfAssetsAmt | 0 | 0 |
| IRS990EZ/GamingGrossIncomeAmt | 0 | 0 |
| IRS990EZ/GrantsAndSimilarAmountsPaidAmt | 0 | 17303 |
| IRS990EZ/GrossProfitLossSlsOfInvntryAmt | 0 | 0 |
| IRS990EZ/GrossReceiptsAmt | 0 | 42368 |
| IRS990EZ/GrossSalesOfInventoryAmt | 0 | 0 |
| IRS990EZ/InfoInScheduleOPartIInd | 0 | X |
| IRS990EZ/InitialReturnInd | 0 | X |
| IRS990EZ/InvestmentIncomeAmt | 0 | 4708 |
| IRS990EZ/LandAndBuildingsGrp/BOYAmt | 0 | 0 |
| IRS990EZ/LandAndBuildingsGrp/EOYAmt | 0 | 0 |
| IRS990EZ/LobbyingActivitiesInd | 0 | 0 |
| IRS990EZ/MadeLoansToFromOfficersInd | 0 | 0 |
| IRS990EZ/MembershipDuesAmt | 0 | 22110 |
| IRS990EZ/MethodOfAccountingCashInd | 0 | X |
| IRS990EZ/NetAssetsOrFundBalancesBOYAmt | 0 | 221241 |
| IRS990EZ/NetAssetsOrFundBalancesEOYAmt | 0 | 254692 |
| IRS990EZ/NetAssetsOrFundBalancesGrp/BOYAmt | 0 | 221241 |
| IRS990EZ/NetAssetsOrFundBalancesGrp/EOYAmt | 0 | 254692 |
| IRS990EZ/OccupancyRentUtltsAndMaintAmt | 0 | 3963 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 0 | 8.00 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 1 | 8 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 2 | 2 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 3 | 2 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 4 | 1 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 5 | 0.5 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 6 | 2 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 7 | 5 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 8 | 0.5 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 1 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 2 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 3 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 5 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 6 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 7 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 8 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 1 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 2 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 3 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 5 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 6 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 7 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 8 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 1 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 2 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 3 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 5 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 6 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 7 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 8 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 0 | John Tilden |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 1 | Ken Walters |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 2 | Beatrice Kondo |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 3 | Mike Sheffield |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 4 | Walt Boyes |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 5 | Joel Davis |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 6 | Joe Smiddie-Brush |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 7 | John Seltzer |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 8 | James Dutton |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 0 | Treasurer & Operations Committees Chair |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 1 | President, Public Relations Committees Chair |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 2 | Director |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 3 | Director, Chair of Scholarship Committee |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 4 | Vice-President, Board of Advisors Liason |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 5 | Secretary |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 6 | Blood Drives Committee Chair |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 7 | Director, Heinlein For Heroes Committee Chair |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 8 | Director, Membership Services Chair |
| IRS990EZ/OperateHospitalInd | 0 | 0 |
| IRS990EZ/Organization501c3Ind | 0 | X |
| IRS990EZ/OrganizationDissolvedEtcInd | 0 | 0 |
| IRS990EZ/OrganizationHadUBIInd | 0 | 0 |
| IRS990EZ/OtherAssetsTotalDetail/BOYAmt | 0 | 49 |
| IRS990EZ/OtherAssetsTotalDetail/EOYAmt | 0 | 0 |
| IRS990EZ/OtherChangesInNetAssetsAmt | 0 | 34756 |
| IRS990EZ/OtherExpensesTotalAmt | 0 | 22407 |
| IRS990EZ/OtherRevenueTotalAmt | 0 | 0 |
| IRS990EZ/PartVIHghstPdCntrctProfSrvcTxt | 0 | NONE |
| IRS990EZ/PartVIOfCompOfHghstPdEmplTxt | 0 | NONE |
| IRS990EZ/PoliticalCampaignActyInd | 0 | 0 |
| IRS990EZ/PrimaryExemptPurposeTxt | 0 | The Society exists to promote the legacy of Robert A. Heinlein by encouraging the reading and discussion of his written work, the use of critical thinking skills in our daily lives, and a love of science essential in promoting humankind's future beyond our home planet. We will "Pay it Forward" through support of educational, literary, and charitable endeavors including, but not limited to: volunteer blood drives; scholarships; the Heinlein For Heroes book distribution program; and the creation and distribution of teaching materials, including support of The Heinlein Journal. |
| IRS990EZ/PrintingPublicationsPostageAmt | 0 | 0 |
| IRS990EZ/ProgramServiceRevenueAmt | 0 | 45 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt | 0 | Heinlein for Heroes book distribution to active duty military, veterans, and their families.7,124 books donated in 376 shipments. These are usually sent to units or families and shared, so it's difficult to estimate how many actually read the books sent. |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt | 1 | Scholarships. $4,000 per recipient in a one-time award, four recipients given each year. For undergraduates (non-freshman) whose major is in a STEM field of study. We had 289 applicants for the scholarships. Our other expense for scholarships is a subscription to AI software that checks submitted essays for nonhuman writing. |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt | 2 | Support of volunteer blood donation. We provide resources to have blood drives at conventions and, since the COVID pandemic, donation in the local community which we record as a virtual drive. We recorded 5,813 blood donations. These can serve a variable number of people depending on the ultimate use of the blood product, which we are not told. |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt | 3 | The Heinlein Society co-sponsors the Robert A. Heinlein Award, awarded each year at the Balticon held by the Baltimore Science Fiction Society, another 501(c)3. The award is given to someone in the field of Science Fiction who has demonstrated outstanding published works in science fiction and/or technical writings to inspire the human exploration of space. We provide a grant for up to half of the expenses incurred by the Award program. |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/GrantsAndAllocationsAmt | 0 | 0 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/GrantsAndAllocationsAmt | 1 | 16000 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/GrantsAndAllocationsAmt | 2 | 0 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/GrantsAndAllocationsAmt | 3 | 911 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/ProgramServiceExpensesAmt | 0 | 13719 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/ProgramServiceExpensesAmt | 1 | 392 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/ProgramServiceExpensesAmt | 2 | 1675 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/ProgramServiceExpensesAmt | 3 | 0 |
| IRS990EZ/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990EZ/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990EZ/SalariesOtherCompEmplBnftAmt | 0 | 0 |
| IRS990EZ/SaleOfAssetsGrossAmt | 0 | 0 |
| IRS990EZ/ScheduleBNotRequiredInd | 0 | X |
| IRS990EZ/SchoolOperatingInd | 0 | 0 |
| IRS990EZ/SpecialEventsDirectExpensesAmt | 0 | 0 |
| IRS990EZ/SpecialEventsNetIncomeLossAmt | 0 | 0 |
| IRS990EZ/SubjectToProxyTaxInd | 0 | 0 |
| IRS990EZ/SumOfTotalLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990EZ/SumOfTotalLiabilitiesGrp/EOYAmt | 0 | 0 |
| IRS990EZ/TanningServicesProvidedInd | 0 | 0 |
| IRS990EZ/TaxImposedOnOrganizationMgrAmt | 0 | 0 |
| IRS990EZ/TaxImposedUnderIRC4911Amt | 0 | 0 |
| IRS990EZ/TaxImposedUnderIRC4912Amt | 0 | 0 |
| IRS990EZ/TaxImposedUnderIRC4955Amt | 0 | 0 |
| IRS990EZ/TaxReimbursedByOrganizationAmt | 0 | 0 |
| IRS990EZ/TotalExpensesAmt | 0 | 43673 |
| IRS990EZ/TotalProgramServiceExpensesAmt | 0 | 15786 |
| IRS990EZ/TotalRevenueAmt | 0 | 42368 |
| IRS990EZ/TransactionWithControlEntInd | 0 | 0 |
| IRS990EZ/TrnsfrExmptNonChrtblRltdOrgInd | 0 | 0 |
| IRS990EZ/TypeOfOrganizationCorpInd | 0 | X |
| IRS990EZ/WebsiteAddressTxt | 0 | https://www.heinleinsociety.org |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 37660 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 39313 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 119408 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 47599 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 62961 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 306941 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 4708 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 2870 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 281 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 376 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 34 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 8269 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.97377 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.98797 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 306941 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 37660 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 39313 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 119408 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 47599 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 62961 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 306941 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 315210 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | 4 $4000 ($16,000) STEM scholarships granted plus $392 for software that checks for AI essays. Heinlein Award expenses--1/2 actual amount granted to Baltimore Science Fiction Society--$991 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | Description;Amount^Blood Drives;1675|Conventions;645|Heinlein for Heroes;13719|Operations;5628|PayPal Fees;740^Total;22407^ |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | Fidelity Investment Fund returns added to balances |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Form 990-EZ, Part I, Line 10 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Form 990-EZ, Part I, Line 16 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Form 990-EZ, Part I, Line 20 |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | John Tilden |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | Treasurer |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 4109033196 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-10-09 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | THE HEINLEIN SOCIETY |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | HEIN |
| ReturnHeader/Filer/EIN | 0 | 760660576 |
| ReturnHeader/Filer/PhoneNum | 0 | 4109033196 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | 3553 Atlantic Avenue Box 341 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | Long Beach |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | CA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 908075606 |
| ReturnHeader/IRSResponsiblePrtyInfoCurrInd | 0 | 1 |
| ReturnHeader/ReturnTs | 0 | 2025-10-09T11:32:50-07:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990EZ |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2024-09-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2025-08-31 |
| ReturnHeader/TaxYr | 0 | 2024 |
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