| Tax Status | Description |
| 4940(D)(2) | Private operating foundation exempt from paying excise taxes or investment income |
| 4942(J)(3) | Private operating foundation (other) |
| 509(a) | Private nonoperating foundation |
| 509(a)(3) | |
| 509(a)(3) - Type I | 509(a)(3) - Type I |
| 509(a)(3) - Type II | 509(a)(3) - Type II |
| 509(a)(3) - Type III functionally integrated | 509(a)(3) - Type III functionally integrated |
| 509(a)(3) - Type III not functionally integrated | 509(a)(3) - Type III not functionally integrated |
| 509(a)(4) | Organization organized and operated to test for public safety |
| 1381(a)(2) | Taxable Farmer's Cooperative |
| 4947(a)(1) | Non-exempt charitable trust (Public Charity) |
| 4947(a)(2) | Non-exempt charitable trust |
| 501(c)(1) | Corporations Organized under Act of Congress (including Federal Credit Unions) |
| 501(c)(10) | Domestic Fraternal Societies |
| 501(c)(11) | Teachers' retirement fund associations |
| 501(c)(12) | Local Benevolent Life Insurance Associations, Mutual Irrigation and Telephone Companies, and Like Organizations |
| 501(c)(13) | Cemetery Companies |
| 501(c)(14) | Credit Unions and Other Mutual Financial Organizations |
| 501(c)(15) | Mutual insurance companies |
| 501(c)(16) | Corporations organized to finance crop operations |
| 501(c)(17) | Supplemental Unemployment Benefit Trusts |
| 501(c)(18) | Employee-funded pension trusts created before June 25, 1959 |
| 501(c)(19) | Veterans' Organizations |
| 501(c)(2) | Title-Holding Corporations for Single Parents |
| 501(c)(20) | Group Legal Services Plan Organizations |
| 501(c)(21) | Black Lung Benefit Trusts |
| 501(c)(22) | Withdrawal liability payment fund |
| 501(c)(23) | Veterans' organizations created before 1880 Trusts as described in section 4049 of the Employee Retirement Income Security Act of 1974 (as in effect on the date of the enactment of the Single-Employer Pension Plan Amendments Act of 1986). |
| 501(c)(24) | Title-Holding Corporations or Trusts for Multiple Parents |
| 501(c)(25) | State-Sponsored High-Risk Health Coverage Organizations |
| 501(c)(26) | State-Sponsored Workers' Compensation |
| 501(c)(27) | Reinsurance Organizations |
| 501(c)(28) | National railroad retirement investment trust |
| 501(c)(4) | Civic Leagues and Social Welfare Organizations |
| 501(c)(5) | Labor, Agricultural, and Horticultural Organizations |
| 501(c)(6) | Business Leagues, Etc. |
| 501(c)(7) | Social and Recreation Clubs |
| 501(c)(8) | Fraternal Beneficiary Societies |
| 501(c)(9) | Voluntary Employees' Beneficiary Associations |
| 501(d) | Apostolic and religious organization |
| 501(e) | Cooperative Hospital Service organization |
| 501(f) | Cooperative service organizations of operating education organizations |
| 501(k) | Child care under 501(k) |
| 501(n) | Charitable Risk Pool |
| 521 | Farmer's Cooperative |
| 529 | Qualified State-Sponsored Tuition Program |
| 82 | IRC 527 Political Organization |
| NCES Private School | Private elementary and secondary schools as listed by the U.S. Department of Education's National Center For Education Statistics (NCES). |
| US Governmental Entity | US governmental entities - e.g. cities/towns, police, fire, libraries, parks, etc. - that are not otherwise present in the IRS Business Master File. Reserved for manually verified organizations only. |