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Form 990 filing mistakes that can undermine your nonprofit's credibility

ARTICLE | August 25, 2026

For many nonprofits, Form 990 can feel like one more administrative task competing for attention. Lean teams are often balancing programs, fundraising, governance, and daily operations, so an annual tax filing may not receive the focus it deserves.

But Form 990 isn’t just an annual return. It’s also a public document that donors, grantmakers, regulators, and others may use to evaluate your organization. Inaccurate or incomplete reporting can create compliance problems and raise broader questions about financial stewardship, while repeated failure to meet annual filing requirements can ultimately result in revocation of tax-exempt status. 

Here are several common filing and reporting mistakes that can affect the accuracy, completeness, and credibility of Form 990. 

Assuming last year’s filing approach still applies

It’s easy to assume that your organization should file the same return it filed last year. That may be correct, but it shouldn’t be automatic.

The appropriate Form 990-series filing depends on factors such as the organization’s classification, normal gross receipts, year-end assets, and activities. For example, many small exempt organizations whose annual gross receipts are normally $50,000 or less may satisfy their annual filing requirement with Form 990-N. An organization with gross receipts below $200,000 and total assets below $500,000 may be eligible to file Form 990-EZ instead of the full Form 990. These thresholds are useful starting points, but they aren’t substitutes for reviewing the current rules and the organization’s circumstances.

Also, keep in mind that limited activity doesn’t necessarily eliminate the filing requirement. An organization may still need to file even if it had little revenue, paused most programs, or was largely dormant during the year.

Failing to file a required annual return or notice for three consecutive years results in automatic revocation of tax-exempt status. Correcting an automatic revocation requires a new application for recognition of exemption and the applicable IRS user fee. Depending on the organization and the reinstatement procedure, it may also require delinquent returns, reasonable-cause statements, and professional assistance - potentially consuming substantial time and money. 

A safer process begins by confirming the organization’s classification, receipts, assets, and filing requirements each year. Set an internal deadline before the legal deadline, and verify that the IRS accepted the electronic filing. A rejected return generally must be corrected promptly to preserve the original filing date. 

Filing numbers that haven’t been reconciled

Every material number on Form 990 should be traceable to reliable records. The challenge is that nonprofit financial information often comes from several different systems.

The general ledger and donor database may report contribution revenue differently. Payroll records may not align neatly with Form 990 compensation categories. Audited financial statements may classify certain revenue and expenses differently from the return. These differences aren’t automatically errors; the problem is being unable to explain them.

Common trouble spots include contribution revenue that doesn’t agree with donor records, grants reported inconsistently across the return, compensation that cannot be reconciled to applicable Forms W-2 and 1099, and beginning net assets that don’t match the prior-year filing. 

Meaningful differences should be identified and explained before the filing reaches final review. A written reconciliation helps the preparer understand where the figures came from, gives leadership a clearer view of the filing, and provides support if anyone questions an amount later.

Treating narratives as boilerplate

Some of Form 990’s most important sections don’t involve calculations. Part III asks the organization to describe its mission and major program accomplishments, yet these descriptions are often reused even when programs, priorities, and results have changed.

A statement such as “provided educational and charitable services” tells readers very little. A stronger description might say: “Held 25 workforce-training workshops for 1,200 participants, 85% of whom completed the certification program.”

The second version shows scale and results, provided the figures are supported by the organization’s records. Program leadership should review these descriptions annually and confirm that they accurately reflect the services delivered, people served, and outcomes the organization can substantiate.

Read the return as an outside stakeholder

Most of Form 990 and its schedules are subject to public disclosure. Compensation, governance responses, financial information, program narratives, and unusual transactions may be reviewed by people who don’t have the background available to staff and board members.

For most organizations filing Form 990 or 990-EZ, contributor names and addresses reported on Schedule B aren’t required to be included in the public-inspection copy. Different rules apply to private foundations filing Form 990-PF and section 527 political organizations, whose Schedule B information is generally open to public inspection. Don’t assume that information can (or must) be redacted without checking the applicable disclosure rules, and take care not to publish a copy containing information that isn’t required to be publicly disclosed. 

Before filing, compare the return with the audited financial statements, website, annual report, board minutes, and approved compensation arrangements. Material differences may be entirely legitimate, but they should be understood and, where appropriate, reconciled or explained. Where the form or instructions call for additional explanation, Schedule O can provide useful context clearly and accurately. 

Build a repeatable filing process

Many Form 990 errors occur because relevant information is spread among people who don’t realize the preparer needs it. A lean nonprofit may not have a compliance department, but it can still create a repeatable process.

After the books close, reconcile relevant amounts among the accounting records, financial statements, payroll reports, donor records, investment statements, and prior-year return. During preparation, involve the employees who understand the underlying activities. Before filing, complete the organization’s review process, read the return as an outside stakeholder, and confirm that the electronic filing was accepted.

No single employee needs to know every Form 990 rule. The organization does need a system that surfaces important changes, assigns responsibility, and gives the preparer complete information.

Get guidance tailored to your organization

Form 990 filing requirements depend on your organization’s classification, financial activity, and specific circumstances. If you’re preparing an upcoming return or have questions about which filing applies, reconciliations, disclosures, or the review process, contact our office. We can help identify issues before the return is filed and work with you to develop a more reliable year-over-year process.