Nonprofits get funding from six main places: individual donations, grants from governments and private foundations, corporate sponsorships and workplace giving programs, fees charged for mission-related services, returns on invested funds and endowments, and fundraising events. In 2024, U.S. charitable giving totaled roughly $592.5 billion, with individuals giving about two-thirds of that. No single stream is usually enough, and federal tax law actively pushes organizations to keep their sources broad: a 501(c)(3) that leans too heavily on a narrow group of supporters can be reclassified as a private foundation and hit with tighter rules.
Individual Donations and Planned Gifts
Direct gifts from individuals are the single largest source of nonprofit revenue by a wide margin. They range from small online contributions to multi-million-dollar commitments in capital campaigns. Donors who give to a qualified 501(c)(3) can claim a charitable deduction on their federal return, reducing taxable income for the year the gift is made. Cash donations to public charities are generally deductible up to 60 percent of the donor’s adjusted gross income, with a lower 30 percent cap for gifts of appreciated property like stock or real estate.1Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts Anything unused can carry forward five more years.
Donors sometimes attach strings. A restricted gift might be earmarked for a scholarship program or a building project, and the organization is legally bound to honor that designation. Unrestricted gifts cover payroll, rent, or whatever is most pressing, which is why most fundraisers work hard to grow that category.
Planned giving moves more slowly but produces some of the biggest gifts a nonprofit will ever see. Bequests alone accounted for nearly $46 billion in 2024. Naming a nonprofit as a beneficiary in a will or trust reduces the taxable value of an estate. A charitable remainder trust pays income to the donor during their lifetime and passes the remaining assets to the nonprofit afterward. A charitable gift annuity works in reverse: the donor makes an upfront gift, and the nonprofit pays them a fixed amount annually. These arrangements take years to cultivate and demand careful legal documentation.
Government and Foundation Grants
Grants from federal agencies, state governments, and private foundations pay for medical research, after-school programs, and much in between. Federal opportunities are posted on Grants.gov, and the application process is demanding.2Grants.gov. Home Expect to produce a detailed budget, measurable outcomes, an evaluation plan, and evidence that the organization can actually manage the money. Private foundations often ask for a letter of inquiry before inviting a full proposal, and many restrict giving to specific regions or issue areas.
Any organization taking federal grant money must follow the Uniform Guidance at 2 CFR Part 200, which sets rules for how funds are spent, tracked, and audited.3eCFR. 2 CFR Part 200 – Uniform Administrative Requirements, Cost Principles, and Audit Requirements for Federal Awards Violations can mean clawbacks or debarment from future awards. One detail small grantees frequently miss: federal grants let you charge a portion of overhead to the award, and organizations without a negotiated rate can use a de minimis rate of up to 15 percent of modified total direct costs, with no documentation required to justify it.4eCFR. 2 CFR 200.414 – Indirect Costs Leaving that recovery on the table is a common mistake.
Foundation grants come with their own reporting and sometimes site visits, though the compliance load is usually lighter than federal. Grants are also competitive, and most applicants get rejected, so treating them as the whole strategy is risky.
Corporate Sponsorships and Workplace Giving
Business partnerships bring in money through sponsorships, matching gift programs, and payroll deduction. Many large employers match employee donations dollar-for-dollar, effectively doubling each gift. Payroll giving lets employees route part of each paycheck automatically, producing steady predictable income.
The IRS draws a sharp line between a corporate gift and a sponsorship, and it changes the tax treatment. A pure gift returns nothing of substantial value to the company. A sponsorship is a payment in exchange for public recognition. Displaying a sponsor’s name, logo, and website address is fine and does not create taxable income. Provide advertising space, exclusive endorsement language, or links to product pages, though, and the IRS may treat part or all of the payment as advertising revenue subject to unrelated business income tax.5Office of the Law Revision Counsel. 26 USC 511 – Imposition of Tax on Unrelated Business Income of Charitable, Etc., Organizations Nonprofits that package sponsorships with advertising benefits should split the payment into a deductible gift portion and a taxable advertising portion.
Program Service Revenue
Charging fees for services that directly advance the mission is one of the most sustainable ways to fund a nonprofit. Tuition at a nonprofit school, admission at a museum, patient charges at a nonprofit hospital, ticket sales at a performing arts center — each counts as program service revenue. A nonprofit is allowed to run a surplus from these activities as long as the money is reinvested in the mission rather than distributed to insiders.6eCFR. 26 CFR 1.501(c)(3)-1 – Organizations Organized and Operated for Religious, Charitable, Scientific, Testing for Public Safety, Literary, or Educational Purposes, or for the Prevention of Cruelty to Children or Animals
Trouble starts when a nonprofit earns money from activities unrelated to its exempt purpose. That income is unrelated business taxable income, and the net profit is taxed at the standard 21 percent corporate rate.5Office of the Law Revision Counsel. 26 USC 511 – Imposition of Tax on Unrelated Business Income of Charitable, Etc., Organizations A museum gift shop selling books about its exhibits is mission-related and tax-free; selling unrelated consumer goods can trigger the tax. The organization reports this income on Form 990-T. A small amount is not a crisis, but if unrelated income starts dominating the budget, the IRS may question whether the organization still qualifies for exemption.
Investment Income and Endowments
Many nonprofits hold investment portfolios or endowments that generate dividends, interest, and capital gains. Federal law specifically excludes these types of passive income from unrelated business income tax, so the organization owes no tax on dividends, interest, royalties, rents from real property, or gains from selling investments.7Office of the Law Revision Counsel. 26 USC 512 – Unrelated Business Taxable Income The exclusion goes away for debt-financed property. If a nonprofit borrows money to buy an investment asset, a proportional share of the income becomes taxable.8Office of the Law Revision Counsel. 26 USC 514 – Unrelated Debt-Financed Income
An endowment is a long-term pool of donated funds. The organization invests the principal and spends only a portion of the returns each year. Typical spending policies draw 4 to 5 percent of the fund’s average value over the prior three to five years, which smooths market volatility. The Uniform Prudent Management of Institutional Funds Act, adopted in most states, generally discourages spending more than 7 percent in any single year. Building an endowment takes decades, but once it exists it provides a financial cushion no other source can match.
Events, Raffles, and Membership Dues
Galas, auctions, walkathons, and similar events do double duty: revenue plus community engagement. Many of these involve what the IRS calls a quid pro quo contribution, where the participant receives something of value like a dinner or an auction item. When the payment exceeds $75, the nonprofit must give the donor a written statement saying only the amount above the fair market value of what they received is deductible, plus a good-faith estimate of that value.9Office of the Law Revision Counsel. 26 USC 6115 – Disclosure Related to Quid Pro Quo Contributions Skipping the disclosure can bring penalties.
Raffles and gaming get more complicated. Raffle income is generally treated as unrelated business income unless an exclusion applies. The two most common are the volunteer labor rule, which exempts income when substantially all the work is done by unpaid volunteers, and the bingo exclusion, which applies when the games do not violate state or local law.10Internal Revenue Service. Exempt Organization Gaming and Unrelated Business Taxable Income State gambling laws vary, so check local rules before running any game of chance.
Membership dues provide predictable recurring revenue for professional associations, museums, and public broadcasters. The same quid pro quo rules apply: if members receive benefits worth more than a nominal amount, the nonprofit has to tell them how much of the dues payment is actually deductible.
Why the Mix Itself Is Regulated: The Public Support Test
Every 501(c)(3) is classified as either a public charity or a private foundation, and the difference has real consequences. Private foundations face excise taxes on investment income, mandatory annual payouts, and self-dealing restrictions that public charities avoid. Classification depends on where the money comes from.
There are two main paths to public charity status. Under Section 509(a)(1), an organization qualifies if it normally receives a substantial part of its support from government or the general public, measured against a one-third threshold.11Office of the Law Revision Counsel. 26 USC 509 – Private Foundation Defined Under Section 509(a)(2), the organization can count a combination of gifts, grants, membership fees, and gross receipts from mission-related activities, but investment income must not exceed one-third of total support.12Internal Revenue Service. Requirements for Publicly Supported Charities Organizations landing between 10 and 33⅓ percent public support can still qualify under a facts-and-circumstances test if they can show they genuinely operate like a publicly supported organization.13Internal Revenue Service. Exempt Organizations Annual Reporting Requirements – Form 990, Schedules A and B: Facts and Circumstances Public Support Test
A nonprofit that gets 80 percent of its budget from one family foundation may be doing great work, but the IRS will treat it as a private foundation unless it can diversify. The public support calculation is reported annually on Schedule A of Form 990.
Reporting and Registration That Come With Raising Money
Every tax-exempt organization files an annual return with the IRS, and which version depends on size. The smallest, with gross receipts normally at or below $50,000, can file the Form 990-N electronic postcard. Organizations with gross receipts under $200,000 and total assets under $500,000 may file the shorter Form 990-EZ. Larger organizations file the full Form 990.14Internal Revenue Service. Instructions for Form 990 Return of Organization Exempt From Income Tax The return is due the 15th day of the fifth month after the fiscal year ends, so May 15 for calendar-year filers, and a six-month extension is available.15Internal Revenue Service. Return Due Dates for Exempt Organizations: Annual Return Miss the deadline three years in a row and tax-exempt status is automatically revoked under IRC Section 6033(j), with no warnings and no exceptions.16IRS. Automatic Revocation of Exemption for Non-Filing: Frequently Asked Questions This catches more small organizations than you would expect, often when a volunteer treasurer moves on and nobody picks up the filing.
Before asking the public for donations, roughly 40 states require nonprofits to register with a state agency, usually the attorney general’s office or secretary of state. Fees range from nothing to a few hundred dollars, often on a sliding scale tied to revenue. Nonprofits that solicit online are potentially reaching donors in every state, which makes multi-state registration a real administrative load. Failing to register before soliciting can bring fines, cease-and-desist orders, or reputational damage far larger than the compliance cost. Using professional fundraisers or running cause-related marketing with corporate partners triggers additional registration requirements in many states.