Last updated: July 2026
Short answer: Nonprofit tax compliance means keeping three regulators satisfied at once. The IRS requires an annual Form 990-series filing, and it automatically revokes tax-exempt status after three consecutive missed years. California adds its own layer: the Franchise Tax Board’s Form 199 series and the Attorney General’s charity registration with the annual RRF-1 renewal. Beyond filings, exempt organizations must watch unrelated business income, private benefit, and payroll obligations. Most nonprofits that lose their exemption lose it to paperwork, not scandal, and reinstatement costs far more than compliance.
Running a nonprofit in the Bay Area means fundraising, programs, and a compliance calendar that punishes forgetfulness. Board members are often surprised to learn that tax-exempt does not mean tax-ignored: exempt organizations file returns, pay some taxes, and answer to both federal and California regulators. This guide lays out the core of nonprofit tax compliance, the filings, the traps, and the fixes when something has already slipped.
What Form 990 does a nonprofit have to file?
Every 501(c)(3) except churches and certain church-related entities files something annually. Which form depends on size: organizations with gross receipts normally $50,000 or less file the Form 990-N e-Postcard, those under $200,000 in receipts and $500,000 in assets may file Form 990-EZ, and larger organizations file the full Form 990 [Source: IRS 2026].
| Annual filing | Who files it | Due date |
|---|---|---|
| Form 990-N | Gross receipts normally $50,000 or less | 15th day of 5th month after year end |
| Form 990-EZ | Receipts under $200,000 and assets under $500,000 | Same deadline |
| Form 990 | Everyone larger | Same deadline |
| Form 990-T | Any org with $1,000+ of unrelated business income | Same deadline |
For calendar-year organizations that means May 15, with extensions available for everything except the e-Postcard. The 990 is also a public document that donors and watchdogs read, so it doubles as a marketing artifact. Boards that treat it as a compliance chore miss that the 990 is often the first impression a major funder gets. Organizations juggling entity questions alongside their filings will find related context on our business and nonprofit services page.
What happens if a nonprofit doesn’t file Form 990?
The consequence is automatic and unforgiving. Under the Pension Protection Act, the IRS revokes the tax-exempt status of any organization that fails to file a required 990-series return for three consecutive years, effective on the due date of the third missed filing [Source: IRS 2026].
No hearing, no warning shot beyond routine notices, no discretion. The scale is startling: from mid-2010 through 2017 the IRS revoked the exempt status of more than 760,000 organizations for non-filing [Source: Foundation Group 2025]. Revocation lands on a public list, donations stop being deductible, and the organization becomes a taxable entity overnight. Reinstatement is possible through several IRS procedures, including retroactive reinstatement for organizations that act within 15 months, but it requires a new application, fees, and often penalty exposure for the gap years. A tax attorney can pick the right reinstatement path and handle the penalty relief arguments, which resemble the reasonable cause playbook in our IRS penalty abatement guide.
What California filings does nonprofit tax compliance require?
California runs a parallel system. Exempt organizations file the FTB’s Form 199 or the electronic 199N annually, and charities must register with the Attorney General’s Registry of Charities and file the RRF-1 renewal every year, with fees scaled to revenue [Source: California Attorney General 2026].
The state consequences bite independently of the federal ones. The FTB can revoke state exemption and assess the minimum franchise tax for lapsed years, and the Attorney General can list a charity as delinquent, which legally bars it from soliciting donations in California [Source: FTB 2026]. Many organizations discover a delinquency only when a grant application requires a letter of good standing. A useful board habit is the Three-Regulator Check each January: confirm status with the IRS, the FTB, and the AG registry before the fundraising season starts. Nonprofits also carry the same beneficial ownership and entity governance questions as other California entities, topics we cover in who is a beneficial owner under the Corporate Transparency Act.
Do nonprofits pay any taxes at all?
Yes, more than most boards expect. The exemption covers income related to the charitable mission, but unrelated business income is taxed at the 21% corporate rate once it exceeds $1,000, reported on Form 990-T [Source: IRS 2026].
Classic examples include advertising revenue, regularly operated gift shops selling non-mission merchandise, and rental income from debt-financed property. Nonprofits with employees also handle full payroll tax obligations, and misclassifying workers triggers the same state audits as any business, a risk we detail in our post on tax problems for small business owners. California sales tax can apply to auction items and merchandise. The dangerous myth is that exempt status is a blanket. It is a specific shield for specific income, and the edges are exactly where examinations focus. When the IRS opens an inquiry into private benefit, excess compensation, or unrelated income, the matter belongs with counsel experienced in audit and litigation representation.
How should a nonprofit board manage compliance risk?
Assign it, calendar it, and document it. The IRS’s own governance research has long connected board oversight with compliance, and the Form 990 asks directly whether the board reviewed the return before filing, a question donors can read [Source: IRS 2026].
A workable minimum: a single owner for the compliance calendar, a conflict of interest policy that gets signed annually, board minutes that record big decisions, and an annual review of executive compensation against comparable data. Organizations that pay insiders should be careful with the excess benefit rules, which can impose personal excise taxes on the individuals involved. Growth moments deserve special attention: hiring the first employee, launching earned revenue, receiving property, or expanding to other states each adds filings. Professional support through a practice like our tax preparation and planning team turns the calendar into a routine instead of an annual emergency.
How Kim & Rosado helps with nonprofit tax compliance
Kim & Rosado LLP advises Bay Area nonprofits at every stage: formation and exemption applications, annual compliance across the IRS, FTB, and Attorney General, unrelated business income questions, and defense when a regulator comes calling. Partners Nicholas Rosado and Anthony Kim bring decades of IRS experience to exemption issues, and the firm handles reinstatements for organizations that discovered a revocation the hard way. A tax attorney can audit your compliance posture before a regulator does. The firm works with organizations from offices in San Jose and Walnut Creek.
Frequently asked questions about nonprofit tax compliance
How do I check if my nonprofit’s tax-exempt status is still active?
Use the IRS Tax Exempt Organization Search tool to confirm federal status and check the auto-revocation list, then verify California standing with the FTB’s entity status search and the Attorney General’s Registry of Charities. Run all three checks, because the systems do not synchronize. Organizations sometimes stand in good federal graces while delinquent with the state, or the reverse. Five minutes of searching each January prevents the worst surprises, including learning about a revocation from a donor.
Can a nonprofit get its exemption back after automatic revocation?
Yes. The IRS offers reinstatement procedures, including streamlined retroactive reinstatement for smaller organizations that apply within 15 months of revocation and ordinary reinstatement after that. Retroactivity matters because it closes the taxable gap between revocation and reinstatement. The organization must reapply with Form 1023 or 1023-EZ, pay the user fee, and in some cases show reasonable cause for the missed filings. Counsel earns its fee here by picking the path that protects the gap years.
Does my small all-volunteer nonprofit really need to file anything?
Yes. Even an organization with minimal revenue must submit the Form 990-N e-Postcard, which takes minutes, and California’s equivalent 199N, plus maintain its Attorney General registration if it solicits donations. The three-year automatic revocation rule makes no exception for small or dormant organizations, and dormant groups are exactly the ones that miss three years in a row. If your organization has gone quiet, file anyway or dissolve properly. Limbo is the expensive option.
What is unrelated business income for a nonprofit?
Income from a trade or business, regularly carried on, that is not substantially related to the exempt mission. The test is how the income is earned, not how it is spent. Spending gift shop profits on programs does not make the gift shop related. Common triggers include advertising, certain sponsorships, merchandise, and debt-financed rental income. Exceptions exist for volunteer-run activities, donated goods, and passive investment income. Above $1,000, the income is reported on Form 990-T and taxed at corporate rates.
Compliance is cheaper than reinstatement
Nonprofit tax compliance is a calendar problem masquerading as a legal one, until a filing lapses and it becomes both. Whether your organization needs a compliance check, has discovered a revocation, or is facing questions about unrelated income, schedule a consultation and get the house in order before the next grant cycle asks for proof.
