Working through Form 990, step by step

Preparing Form 990, Return of Organization Exempt from Income Tax, is a core responsibility for tax-exempt organizations and the practitioners who serve them. More than a compliance document, Form 990 is a public-facing report that explains an organization’s mission, governance and financial stewardship. While the form’s length and complexity can feel daunting, a structured approach makes the process far more manageable.

Start with the right form

Before any numbers are entered, practitioners must confirm which return the organization is required to file. Tax-exempt organizations generally file Form 990, Return of Organization Exempt from Income Tax; Form 990-EZ, Short Form Return of Organization Exempt from Income Tax; or Form 990-N, Electronic Notice (e-Postcard) for Tax-Exempt Organizations Not Required to File Form 990 or Form 990-EZ. The determination is based largely on gross receipts, total assets and organizational type. When an organization exceeds the filing thresholds for the shorter forms, Form 990 becomes mandatory and brings significantly more disclosure.

Understand the structure of Form 990

Form 990 is organized into parts that each serve a specific purpose. Part I provides a summary snapshot of the organization and is often the most widely read section. Part II is the signature block. Part III focuses on mission and program service accomplishments, while Part VI addresses governance, management and disclosure. These sections explain who runs the organization and what it does to fulfill its exempt purpose.

Part IV functions as a checklist, identifying which additional schedules must be completed. Parts V through VII address compliance, governance policies and compensation. The financial heart of the return appears in Parts VIII, IX and X, followed by reconciliation and accounting method disclosures in Parts XI and XII. Understanding how these sections connect helps prevent errors and inconsistencies. 

Use a strategic preparation sequence

Completing Form 990 from start to finish is rarely the most efficient approach. Many practitioners find success by first completing the organizational background and governance sections, then turning to Part IV (the checklist of required schedules) early in the process. This clarifies which schedules are required and avoids surprises later. Working through the necessary schedules and financial statements before completing the summary sections allows information to flow naturally. Saving Part I for last ensures a clear and accurate overview of the organization’s activities and finances.

Tackle revenue and expenses carefully

Part VIII, Statement of Revenue, requires careful categorization of income sources, including contributions, program service revenue, investment income, and unrelated business income. Consistency with prior filings is important. Part IX, Statement of Functional Expenses, is one of the most scrutinized sections. Expenses must be allocated among program services, management and general, and fundraising. Allocation methods should be reasonable, consistently applied and well documented. Errors here can distort the organization’s financial picture and raise red flags for regulators and donors alike. 

Treat part IV as a compliance roadmap

Part IV may appear straightforward, but it drives much of the return’s complexity. Each “Yes” response can trigger an additional schedule with detailed reporting requirements. Best practice is to review each question carefully and confirm answers against governing documents, financial records, and operational activities. A thoughtful approach to Part IV reduces the risk of missed schedules and IRS follow-up inquiries.

Additional considerations: 

• Form 990 must be filed electronically for most organizations; paper filing is only allowed in limited circumstances. 
• As a public document, Form 990 should not include sensitive information such as Social Security numbers.
• Penalties may apply for late or incomplete filings, and organizations that fail to file for three consecutive years risk automatic revocation of their tax-exempt status.

By following a structured, strategic approach and understanding both the technical and public-facing aspects of Form 990, practitioners can help their clients fulfill their compliance obligations and present their organizations in the best possible light. 

Remember the story behind the numbers

Form 990 is publicly available and often reviewed by donors, grant-makers, and watchdog groups. Beyond technical accuracy, the return should present a clear and consistent story about the organization’s mission and operations. Practitioners who understand this broader context bring added value to nonprofit clients.

To build deeper confidence in Form 990 preparation and learn practical, step-by-step strategies, we invite you to attend our upcoming webinar, Working Through Form 990 Step-by-Step, on July 14 or Oct. 6, 2026. The webinar is also available on demand after the live event.