Tax Obligations and Exemptions for Nonprofit Organizations

A 501(c)(3) determination letter exempts a nonprofit from federal income tax on revenue tied to its exempt mission, but that is where the exemption stops. Nonprofit tax obligations and exemptions run on parallel tracks: the organization still withholds and pays payroll taxes, may owe tax on unrelated business income, faces excise taxes when insiders benefit or when it operates as a private foundation, and has to handle state and local taxes through separate applications. Missing any of these can trigger penalties, personal liability for officers, or automatic loss of exempt status.

What Federal Exemption Actually Covers

Section 501(c)(3) exempts qualifying organizations from federal income tax on income related to their religious, charitable, scientific, or educational purposes. To qualify, the organization must pass an organizational test (the founding documents restrict activities to exempt purposes) and an operational test (the organization actually spends its time and money on those purposes, with no part of the net earnings benefiting private shareholders or individuals).¹²

Most organizations obtain the exemption by filing Form 1023 with a $600 user fee. Smaller organizations that expect gross receipts under $50,000 for each of the next three years, and whose past three years also fall under that threshold, can file the shorter Form 1023-EZ for $275. Both are filed electronically.³⁴

File within 27 months of formation and the exempt status is retroactive to the date the entity was legally created. File later and the effective date becomes the filing date, leaving a gap during which donations were not deductible and the entity owed income tax. Organizations with annual gross receipts normally at or below $5,000 may be treated as tax-exempt without filing at all.⁴

Payroll Taxes the Organization Still Owes

Exempt status does not reach employment taxes. Any nonprofit with employees must withhold federal income tax based on each worker’s Form W-4 and pay the employer share of FICA. Social Security runs at 6.2% on wages up to $184,500 in 2026, and Medicare at 1.45% on all wages with no cap.⁵

There is one meaningful break. Under 26 U.S.C. § 3306(c)(8), services performed for a 501(c)(3) organization are excluded from FUTA employment, so the 6% federal unemployment tax does not apply.⁶ State unemployment rules vary. Many states require 501(c)(3) employers either to pay into the state unemployment system or to reimburse the state dollar-for-dollar when former employees collect benefits.

Personal Liability for Officers and Board Members

Payroll tax compliance is where nonprofit governance turns personal. Under the trust fund recovery penalty in 26 U.S.C. § 6672, any person responsible for collecting and paying over withheld income tax and the employee share of FICA can be held personally liable if those taxes go unpaid. “Responsible” is broad and includes anyone with authority to sign checks or direct how funds are spent. The penalty equals 100% of the unpaid trust fund taxes, and the IRS can pursue it against multiple individuals at the same time.⁷ Board members who approve budgets without verifying payroll tax deposits are putting their own assets in reach.

Unrelated Business Income Tax

When a nonprofit runs a business that is regularly carried on and not substantially related to its exempt mission, profits from that activity are taxed at the standard 21% corporate rate. A museum operating a commercial parking garage open to the public is the classic example.⁸

Form 990-T is required whenever gross income from unrelated business activities reaches $1,000 or more in the tax year.⁹ A $1,000 specific deduction is built into the calculation, so an organization right at the threshold may not owe anything, but it still has to file.¹⁰

Several revenue streams that look commercial are carved out. Dividends, interest, royalties, most rental income, and gains from selling property are all excluded. Two practical exceptions cover the bulk of small-nonprofit fundraising: a business run almost entirely by volunteers is exempt, which is why bake sales and volunteer-staffed events generally don’t trigger UBIT, and a business that sells donated merchandise is exempt, which protects most thrift shops.¹¹

Excise Taxes on Insiders and Private Foundations

The IRS does not always revoke exemption when insiders benefit too generously. Section 4958 imposes intermediate sanctions on the individuals involved. A disqualified person who receives an excess benefit from the organization owes an initial tax of 25% of the excess amount. If the transaction is not corrected within the prescribed period, a second tax of 200% applies. Organization managers who knowingly approved the deal face a separate 10% penalty, capped at $20,000 per transaction.¹²

Private foundations carry an extra layer. A 1.39% excise tax applies to net investment income, including interest, dividends, and capital gains, reported on Form 990-PF. Exempt operating foundations are not subject to this tax.¹³

State and Local Taxes Are a Separate Matter

A federal determination letter does not exempt an organization from state or local taxes. Most states require a separate application for state income tax exemption, typically submitted along with the IRS determination letter.

Sales tax exemption is its own process. Without the appropriate state certificate, the organization pays sales tax like any other buyer. Property tax relief depends on how the property is used. Most jurisdictions require the land or building to be used exclusively or primarily for the exempt purpose, and renting part of a building to a for-profit tenant may put that portion back on the tax rolls.

Roughly 40 states also require charities to register before soliciting donations from residents.¹⁴ Requirements and fees vary, and an organization soliciting donors in multiple states may need to register in each one. Failing to register can result in fines.

Annual Filings and Losing Exemption

Tax-exempt organizations owe no federal income tax on mission revenue, but they still have to file an annual information return. Which form depends on size:

Form 990-N (e-Postcard) for organizations with annual gross receipts normally $50,000 or less.¹⁵
Form 990-EZ for organizations with gross receipts under $200,000 and total assets under $500,000.¹⁶
Full Form 990 for organizations above those thresholds.

All Form 990 series returns are filed electronically.¹⁷ The deadline is the 15th day of the fifth month after the close of the fiscal year, which is May 15 for calendar-year filers.¹⁵ Form 8868 gets an automatic six-month extension.¹⁸

The full Form 990 requires substantial disclosure, including current officers and directors, any key employees with reportable compensation above $150,000, and the five highest-compensated non-officer employees earning above $100,000.¹⁹

A single missed year draws penalties. Three consecutive missed years triggers automatic revocation of tax-exempt status, effective as of the filing due date of the third year. A revoked organization must file regular corporate income tax returns, pay any income tax owed, and lose the ability to receive tax-deductible contributions. Reinstatement requires a new exemption application and another user fee, and retroactive reinstatement is not guaranteed.²⁰ Small organizations that file only the e-Postcard are especially vulnerable because the form is simple enough to forget.

Political Activity and Lobbying Limits

Two activity limits sit alongside the tax rules and can cost an organization its exemption independently of anything on a tax return. Campaign intervention is banned outright: 501(c)(3) organizations cannot participate in political campaigns for or against any candidate for public office, with no dollar threshold and no safe harbor.²

Lobbying is allowed in limited amounts. It cannot be a “substantial part” of the organization’s activities, a standard the IRS applies case by case. Organizations can trade that vague test for specific dollar limits by filing Form 5768 to make a 501(h) election, which sets an allowable lobbying amount tied to exempt-purpose expenditures. Exceeding the limit triggers a 25% excise tax on the excess rather than automatic loss of status.²¹

1
Internal Revenue Service. Exemption Requirements – 501(c)(3) Organizations
2
Office of the Law Revision Counsel. 26 US Code 501 – Exemption From Tax on Corporations, Certain Trusts, Etc.
3
Internal Revenue Service. Form 1023 and 1023-EZ: Amount of User Fee
4
Internal Revenue Service. Instructions for Form 1023-EZ
5
Social Security Administration. Contribution and Benefit Base
6
Office of the Law Revision Counsel. 26 USC 3306 – Definitions
7
Internal Revenue Service. Trust Fund Recovery Penalty (TFRP) Overview and Authority
8
Office of the Law Revision Counsel. 26 USC 11 – Tax Imposed
9
Internal Revenue Service. Instructions for Form 990-T
10
Office of the Law Revision Counsel. 26 US Code 512 – Unrelated Business Taxable Income
11
Internal Revenue Service. Unrelated Business Income Tax Exceptions and Exclusions
12
Office of the Law Revision Counsel. 26 US Code 4958 – Taxes on Excess Benefit Transactions
13
Internal Revenue Service. Tax on Net Investment Income
14
Internal Revenue Service. Charitable Solicitation – Initial State Registration
15
Internal Revenue Service. Annual Electronic Filing Requirement for Small Exempt Organizations – Form 990-N (e-Postcard)
16
Internal Revenue Service. Form 990 Series Which Forms Do Exempt Organizations File
17
Internal Revenue Service. Annual Filing and Forms
18
Internal Revenue Service. Extension of Time to File Exempt Organization Returns
19
Internal Revenue Service. Whose Compensation Must Be Reported in Part VII, Form 990
20
Internal Revenue Service. Automatic Revocation of Exemption for Non-Filing: Frequently Asked Questions
21
Internal Revenue Service. Measuring Lobbying Activity: Expenditure Test