How Do Non-Profits Make Money and Stay Tax-Exempt?

Nonprofits bring in money through five main channels: private donations, grants from governments and foundations, fees charged for their programs and services, membership dues, and returns on invested funds. The word “nonprofit” does not mean the organization is forbidden from earning more than it spends. It means no owner or shareholder can pocket the surplus — every dollar left over has to stay inside the organization and go back into the mission.¹ That single rule is what separates a charity from a business, and it shapes how each revenue stream works.

Donations From Individuals and Companies

Voluntary gifts are the most visible source of nonprofit income. They come in through direct mail appeals, online fundraising pages, recurring monthly pledges, corporate giving programs, and employer match campaigns. Donors who itemize on their tax returns can deduct contributions to qualifying organizations, which is a built-in incentive for individuals and businesses to give.²

Fundraising events — galas, auctions, charity runs — bring in money, but they carry a disclosure rule. When a donor pays more than $75 and gets something in return, the nonprofit must tell them in writing that only the amount above the fair market value of what they received is deductible.³ Pay $300 for a gala ticket with a $100 dinner, and $200 is deductible.⁴

For any single cash gift of $250 or more, the donor needs a written acknowledgment from the nonprofit showing the organization’s name, the amount, and whether anything was given in return.⁵ The nonprofit is not penalized for skipping it, but the donor cannot claim the deduction without it, which quickly discourages future giving.

Gifts of property matter too. Donors can give clothing, furniture, vehicles, artwork, or stock. When a donor claims more than $5,000 for non-cash property (other than publicly traded securities), they attach IRS Form 8283 to their return, and the nonprofit signs Part V.⁶ Publicly traded stock skips the appraisal step and is valued at fair market value on the date of the gift.⁴ In-kind help like donated office space, pro bono legal work, or volunteer hours frees up cash the organization would otherwise spend on overhead.

Grants From Governments and Foundations

A grant is a formal award of money, and unlike a donation it comes with strings. Written agreements, spending restrictions, performance benchmarks, and reporting deadlines all travel with the check.

Federal, state, and local agencies fund nonprofits through competitive grants that follow the Uniform Guidance in 2 CFR Part 200.⁷ These awards are usually restricted, meaning the money can only be spent on the project described in the agreement. Spending outside those lines, or missing a reporting deadline, can force the nonprofit to return the funds.

Independent foundations and corporate-sponsored foundations write grants too. Some fund general operating support (salaries, rent, administration), and others fund one specific project. Foundations typically require a signed agreement, annual spending reports, and the return of any unused money.⁸ The tradeoff for that paperwork is predictability: a multi-year grant makes long-term planning possible in a way that individual donations rarely do.

Fees for Services the Nonprofit Provides

Plenty of nonprofits charge for what they do. Hospital patient bills, university tuition, museum admission, childcare fees, and counseling copays all count. Because the activity itself is the mission, the money stays tax-exempt so long as it is substantially related to the organization’s charitable purpose.⁹ A university charging tuition is doing exactly what makes it a university.

When Earned Income Gets Taxed

If a nonprofit regularly runs a business that is not substantially related to its exempt purpose, profits from that activity are subject to the Unrelated Business Income Tax.¹⁰ A university operating a commercial pharmacy open to the general public is the standard example — selling prescriptions to the neighborhood is not what makes the university exempt. Federal law carves out three important exceptions that keep common nonprofit side businesses out of the tax:

Volunteer-run businesses. If substantially all the work is done by unpaid volunteers, the income is not taxable. A volunteer-staffed thrift store is the classic case.¹¹
Convenience businesses. A cafeteria, gift shop, or similar operation run primarily for the convenience of members, students, patients, or employees is exempt.¹²
Sales of donated merchandise. If substantially all the goods sold were donated, the income is not taxable, which is why charity thrift shops selling donated clothing generally owe nothing.¹²

Organizations with $1,000 or more in gross unrelated business income file Form 990-T to report and pay the tax on what remains after related expenses and a $1,000 specific deduction.⁹¹³

Membership Dues

Professional associations, social clubs, and community groups collect recurring dues in exchange for concrete member benefits: journal subscriptions, networking events, facility access, certification programs. Because the member gets something of roughly equal value back, dues generally are not deductible as a charitable contribution.⁴ If the dues exceed the value received, only the excess counts. What dues do offer the organization is predictability — an annual base of revenue that lets bar associations, trade groups, and recreation centers plan a year of programming with confidence.

Investment Income and Endowments

Established nonprofits invest surplus cash and endowment gifts to earn dividends, interest, and capital gains. This passive investment income is generally excluded from unrelated business taxable income, so ordinary stock dividends and bond interest are not hit by UBIT.¹³ Investment returns act as a cushion when donations or grants dip.

An endowment is a pool of donated money invested for the long term. The organization aims to preserve the original principal while spending a share of the returns each year. Nearly every state has adopted the Uniform Prudent Management of Institutional Funds Act (UPMIFA), which governs how charities manage and spend from endowments. UPMIFA replaced an older rule that strictly barred spending below the original dollar value of the gift, giving boards flexibility to make prudent decisions that account for inflation and market conditions. As a guardrail, some states apply a rebuttable presumption that spending more than 7 percent of the endowment’s fair market value (averaged over at least three years) is imprudent. It is not a safe harbor in either direction, but it gives boards a working benchmark.

Why Compliance Protects the Money

Bringing money in is only half of it. If a nonprofit loses its tax-exempt status, donations dry up, foundations stop writing grants, and earned income can become taxable. Two ongoing requirements matter most.

The first is the public support test. To stay classified as a public charity rather than a private foundation, a 501(c)(3) generally has to show that at least one-third of its total support comes from the general public, government sources, or other public charities, measured on a rolling five-year basis.¹⁴ Leaning too heavily on a handful of large donors or on investment income can trigger reclassification as a private foundation, which brings tighter rules on operations and distributions.¹⁵

The second is the annual filing. Every tax-exempt organization has to file a version of Form 990 with the IRS each year. Miss the filing for three consecutive years and the exemption is automatically revoked, effective the due date of the third missed return.¹⁶¹⁷ A revoked organization must reapply for exemption and may owe income tax on revenue earned during the gap. The IRS keeps a searchable public list of revoked organizations, which is one of the first places a cautious donor or grantmaker will look.

1
Office of the Law Revision Counsel. 26 USC 501 – Exemption From Tax on Corporations, Certain Trusts, Etc.
2
Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts
3
Office of the Law Revision Counsel. 26 USC 6115 – Disclosure Related to Quid Pro Quo Contributions
4
Internal Revenue Service. Publication 526, Charitable Contributions
5
Internal Revenue Service. Charitable Contributions – Written Acknowledgments
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Internal Revenue Service. Charitable Organizations – Substantiating Noncash Contributions
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eCFR. 2 CFR Part 200 – Uniform Administrative Requirements, Cost Principles, and Audit Requirements for Federal Awards
8
Internal Revenue Service. Terms of Grants – Private Foundation Expenditure Responsibility
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Internal Revenue Service. Unrelated Business Income Tax
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Office of the Law Revision Counsel. 26 USC 511 – Imposition of Tax on Unrelated Business Income of Charitable, Etc., Organizations
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Internal Revenue Service. Volunteer Labor Exclusion From Unrelated Trade or Business
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Office of the Law Revision Counsel. 26 USC 513 – Unrelated Trade or Business
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Office of the Law Revision Counsel. 26 USC 512 – Unrelated Business Taxable Income
14
Internal Revenue Service. Exempt Organizations Annual Reporting Requirements – Form 990, Schedules A and B – Public Charity Support Test
15
Office of the Law Revision Counsel. 26 USC 509 – Private Foundation Defined
16
Internal Revenue Service. Automatic Revocation of Exemption
17
Office of the Law Revision Counsel. 26 USC 6033 – Returns by Exempt Organizations