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Part IV doesn't apply to foreign organizations.

Part XV-B. Relationship of Activities to the Accomplishment of Exempt Purposes

2025 Inst 990-PF (PDF) · 2026-10-03 edition · updated 2026-10-04 · United States

To explain how each amount in column (e) of Part XV-A was related or exempt function income, show the line number of the amount in column (e) and give a brief description of how each activity reported in column (e) contributed importantly to the accomplishment of the organization's exempt purposes (other than by providing funds for such purposes). Activities that generate exempt-function income are activities that form the basis of the organization's exemption from tax.

Also, explain any income entered in column (e) that is specifically excluded from gross income other than by section 512, 513, or 514. If no amount is entered in column (e), don't complete Part XV-B.

Example. M, a performing arts association, is primarily supported by endowment funds. It raises revenue by charging admissions to its performances. These performances are the primary means by which the organization accomplishes its cultural and educational purposes.

M reported admissions income in column (e) of Part XV-A and explained in Part XV-B that these performances are the primary means by which it accomplishes its cultural and educational purposes.

Because M also reported interest from state bonds in column (e) of Part XV-A, M explained in Part XV-B that such interest was excluded from gross income by section 103.

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