After determining which Form 990 your organization is required to file, the next challenge is ensuring that the return is accurate, complete, and consistent.
In our experience, many Form 990 issues are not driven by complex tax rules. Instead, they arise from common, preventable mistakes—often due to incomplete information, timing issues, or lack of coordination across the organization.
Understanding these areas can help reduce risk, improve transparency, and strengthen overall compliance.
Why These Mistakes Matter
Form 990 is a public document. It is reviewed by donors, grantors, regulators, and other stakeholders to evaluate how an organization operates.
Even when an organization’s activities are appropriate, incomplete or inconsistent reporting can raise unnecessary questions.
Many of these risks can be mitigated with early identification and better information gathering.
Common Form 990 Mistakes
1. Misclassifying Revenue
Not all revenue is treated the same for Form 990 purposes.
Nonprofits often receive revenue from a variety of sources, including:
- Contributions and grants
- Sponsorships
- Program service fees
- Merchandise sales
- Facility rentals
Each type of revenue must be evaluated carefully, particularly when determining whether it may be considered unrelated business income (UBI).
Misclassification can affect:
- The presentation of revenue on Form 990
- Whether additional schedules are required
- The organization’s overall risk profile
2. Overlooking Related-Party Transactions
Transactions involving insiders—such as board members, officers, or their affiliated entities—require careful review and disclosure.
These may include:
- Payments for services
- Leases or other business arrangements
- Reimbursements or expense allocations
Even when transactions are appropriate and at fair market value, they must be properly disclosed on the return, often on Schedule L.
These items are frequently identified late in the process, which can lead to incomplete or inconsistent reporting.
3. Incomplete Governance Disclosures
Form 990 includes detailed questions about governance practices, including:
- Board independence
- Conflict of interest policies
- Documentation of meetings and decisions
- Review of the Form 990 prior to filing
Organizations sometimes answer these questions based on assumptions rather than documented practices.
Accurate responses require coordination between leadership, legal counsel, and the finance function.
4. Underreporting Fundraising Activities
Fundraising activities are often more complex than they appear.
Events, sponsorships, and donor benefits may require detailed reporting, particularly on Schedule G.
For example:
- Ticketed events may include both contribution and exchange elements
- Sponsorship arrangements may involve advertising components
- Auctions and raffles require careful tracking
Even smaller events can trigger additional reporting requirements.
5. Weak or Missing Narrative Disclosures
Narrative disclosures—especially in Schedule O—provide context for the information reported elsewhere on the return.
These sections are critical for explaining:
- Program activities
- Governance practices
- Significant changes or unusual transactions
Generic or incomplete narratives can create confusion or raise questions, even when the financial information is accurate.
Well-crafted disclosures help ensure that the return reflects the organization’s activities clearly and accurately.
The Real Risk: Inconsistency
One of the most common issues we see is inconsistency across the return.
For example:
- Program descriptions in Part III may not align with reported revenue
- Governance responses may not reflect actual practices
- Disclosures may not fully explain key transactions
Because Form 990 is reviewed as a whole, inconsistencies can draw attention and increase scrutiny.
A More Effective Approach
Many of these issues can be addressed by improving how information is gathered and communicated throughout the year.
A proactive approach includes:
- Identifying key transactions as they occur
- Maintaining documentation across departments
- Coordinating between finance, development, and leadership
- Reviewing governance practices regularly
- Preparing narrative disclosures alongside financial data
This approach reduces last-minute surprises and leads to more accurate and consistent reporting.
Final Thought
Form 990 is not just a filing requirement—it is a reflection of your organization’s transparency, governance, and accountability.
Many of the most common mistakes are preventable with better processes and communication.
By focusing on accuracy, consistency, and clarity, organizations can reduce compliance risk and present a more complete picture of their operations.
