Receiving an IRS determination letter is a milestone worth celebrating. But the letter settles one question — whether the organization qualifies — while leaving another largely unanswered: what it actually takes to stay qualified.
Tax exemption is not a permanent grant. It is a status an organization keeps by meeting ongoing obligations, and the most persistent myths in the sector come from treating the determination letter as a finish line rather than a starting point. Below are the misconceptions we see most often — and what is actually true.
501(c)(3) is the section of the U.S. Internal Revenue Code that grants federal tax exemption to organizations operated for charitable, educational, religious, scientific, and similar purposes - sometimes mistakenly called a “503(c),” a designation that does not exist. Most are public charities; others are private foundations — a distinction that shapes nearly every rule that follows.
That determination letter marks a beginning, not a finish line. Tax exemption is a status an organization keeps by meeting ongoing obligations, and the most persistent myths in the sector come from forgetting that. Below are the misconceptions we see most often — and what is actually true.
Do nonprofits have to file taxes? Yes — every 501(c)(3) has an annual federal filing obligation.
A 501(c)(3) does not pay federal income tax on activities related to its mission, but it does file an annual information return with the IRS. Board members who ask “does a nonprofit file tax returns?” or “does a 501(c)(3) file a tax return?” are almost always asking about IRS Form 990.
The return is called an information return for a reason. Its purpose is not to calculate tax owed — it is to show the IRS and the public how the organization raised money, spent it, and governed itself.
In most cases, yes. There is no income threshold below which filing stops, which also answers a related question: how much can a nonprofit make before filing taxes? An organization that took in $0 during the year still generally files the Form 990-N (e-Postcard). Churches and certain government-affiliated organizations are among the narrow exceptions.
The stakes are significant: an organization that fails to file for three consecutive years loses its tax-exempt status automatically. The IRS is not required to send a warning, and the clock runs whether or not the organization was active.
Knowing how to file taxes for a nonprofit organization starts with knowing which of the nonprofit tax forms applies to you.
You’ll hear it called a 990 tax form, a 990 report, or a 990 tax return. All refer to the same thing: a public document that summarizes an organization’s finances, governance, programs, and compensation.
For many donors, journalists, and grantmakers, it is the first thing they read about you.
Which version an organization files depends on its size and structure:
Note: To qualify for Form 990-EZ, an organization must meet both thresholds. If either is exceeded, the full Form 990 is required.
That last line is worth pausing on. The nonprofit corporation vs. private foundation question — whether you are a public charity or a private foundation shapes far more than which form you file. It affects how you raise money, which excise taxes apply, and how your grants are treated.
A complete 990 starts with complete books. Learning how to fill out a 990 means gathering year-end financial statements, a list of officers, directors, and key employees with their compensation, details on program accomplishments, and answers to a series of governance questions.
That governance section is where many organizations are caught off guard. The 990 asks whether the board reviewed the return before filing, what policies the organization has in place, and how executive pay was set. The IRS asks these questions not as a formality, but as a measure of real oversight — and donors and grantmakers read the answers the same way.
A few practical points on 990 filings for nonprofits:
Because the 990 draws on accounting, governance records, and program data all at once, it is only as accurate as the systems feeding it. Organizations that treat it as a year-end scramble tend to find gaps — missing board minutes, unreconciled accounts, undocumented compensation decisions — at the worst possible time.
“Nonprofit” describes a tax status, not a business model. Public charities can generate revenue, run surpluses, and pay their people well.
Earned income is common — and often healthy. Nonprofit fee-for-service programs and other earned-revenue strategies help diversify funding and reduce reliance on any single donor or grant.
The rule to understand is unrelated business taxable income (UBTI). If a regular revenue-generating activity is not substantially related to the organization’s exempt purpose, there are other tax implications.
Can 501(c)(3) employees receive high salaries? Yes — as long as compensation is reasonable, meaning comparable to what similar organizations pay for similar roles. Best practice is to follow Guidestar’s Nonprofit Compensation Guidelines.
Though no one owns a public charity, its assets still cannot be used to benefit insiders. That principle — private inurement — is what the IRS is guarding against. When compensation or other transactions with insiders exceed fair value, the IRS can impose excise taxes on the individuals involved and on the board members who approved them, and in serious cases can revoke exemption.
The best protection is process. Boards that rely on comparability data, have independent members approve the decision, and document their reasoning at the time create a strong presumption that pay is reasonable.
Compensation matters beyond compliance. Program quality depends on the people delivering it, and underpaying to look lean often costs more in turnover than it saves.
Advocacy is a legitimate — often essential — part of a mission. But a public charity works within two distinct limits, and they are frequently confused:
If political activity is central to your work, it is worth understanding the 501(c)(3) versus 501(c)(4) differences. Social welfare organizations under 501(c)(4) have far more latitude in nonprofit political lobbying activity, though contributions to them are generally not tax-deductible.
Are all nonprofit donations tax-deductible? Deductibility depends on both who receives the gift and what the donor gets in return.
A gift is deductible when it goes to a qualified organization that meets the IRS charitable purpose definition. From there, the rules turn on the details:
Getting these details right protects your donors’ deductions — and your organization’s credibility with them.
Staying in good standing — and eligible for opportunities like federal grant funding programs — depends less on any single filing than on the structure behind it.
Missing these steps has real consequences. An organization that loses its status through three years of non-filing must submit a new exemption application, and reinstating revoked nonprofit tax status is slow and costly. Retroactive reinstatement is possible in some cases — but it is far easier never to need it.
Most compliance problems do not start with a misunderstanding of the law. They start with gaps in day-to-day operations: transactions recorded late, board decisions undocumented, filings tracked on someone’s personal calendar.
That is why organizations that stay in good standing year after year treat compliance as ongoing infrastructure, not an annual event.
It takes both reliable systems and experienced people running them — accounting that reconciles monthly, governance records kept as decisions are made, and someone accountable for every deadline. When those pieces work together, the 990 becomes a summary of a well-run year rather than a reconstruction of it.
The determination letter is where 501(c)(3) status begins. Keeping it means filing every year, earning revenue and paying staff within clear rules, advocating within defined limits, and giving donors what they need to claim their deductions.
Clearing up these misconceptions lets your organization stay compliant, stay transparent, and keep its focus where it belongs — on the mission.
This article is for general educational purposes and is not tax or legal advice. Talk with your accountant or tax advisor about your organization’s specific situation.
Cobalt Management Services provides back-office infrastructure for nonprofits, including accounting, compliance, and donor management. Find more resources for nonprofit leaders on the Cobalt blog.