Introduction
Schedule O, titled "Supplemental Information to Form 990 or 990-EZ," is where a US tax-exempt organisation explains specific answers on its annual information return. It is short in design but easy to get wrong, because the explanations are public.
Common problems include missing the mandatory Part VI entries, leaving off part and line references, and pasting in last year's text without checking it.
This guide covers the nonprofit Schedule O, not the unrelated Schedule O used with Form 5471 for foreign corporations. It walks through who must file, how to complete it for each return, privacy, and review steps. It is written for the 2025 returns and instructions.
Key Takeaways
- Every full Form 990 filer must attach Schedule O; Form 990-EZ filers attach it only when their answers require it.
- Each explanation must name the Part and line it supports and answer that question directly.
- Schedule O is part of a public filing, so never include Social Security numbers or unnecessary personal data.
- Check line references against the IRS instructions for the tax year you are filing.
What Is Form 990 Schedule O and Why Does It Matter?
Schedule O is the central attachment for narrative answers that do not fit in the main return. It covers explanations of unusual, changed or qualified responses, so the organisation does not need a separate statement for each issue.
It does not replace a specialised schedule. Where another schedule has its own supplemental-information section, use that one instead, as the Schedule O instructions direct.
Schedule O versus other Form 990 schedules
The other schedules each cover a defined subject:
- Schedule A: public charity status and public support
- Schedule B: contributors
- Schedule D: supplemental financial statements, such as donor advised funds
- Schedule E: private schools
- Schedule F: activities outside the United States
- Schedule H: hospitals
Schedule O supplies the narrative that supports answers on the main return. It never stands in for these.
Form 5471 Schedule O is a different form entirely. It reports the organisation or reorganisation of a foreign corporation and acquisitions or dispositions of its stock, and has nothing to do with tax-exempt reporting. Australian groups with US subsidiaries sometimes see both in the same advisory conversation, so the distinction is worth keeping clear.
Why it matters beyond compliance
Donors, grantmakers, regulators, journalists and watchdog groups read Form 990. Candid notes that institutional funders review it during due diligence, and rating sites base scores substantially on it. A plain, factual explanation gives context to governance and financial figures. It should not read as promotional copy.
Who Must File Schedule O?
Full Form 990 filers
All organisations that file Form 990 must attach Schedule O. At a minimum, it must explain:
- Part VI, line 11b: the return review process
- Part VI, line 19: how governing documents, the conflict of interest policy and financial statements are made available
That applies even if the organisation has nothing else to add.
Form 990-EZ filers
Form 990-EZ has no blanket attachment rule. Schedule O is needed only when specific answers call for an explanation, so do not assume every EZ filer has the same obligation.
Confirming the correct return
Work out the right return first. The 2025 benchmarks, per the Form 990-EZ instructions, are:
| Return | Benchmark |
|---|---|
| Form 990-N | Gross receipts normally US$50,000 or less |
| Form 990-EZ | Gross receipts under US$200,000 and year-end assets under US$500,000 |
| Form 990 | US$200,000 or more in receipts, or US$500,000 or more in assets |
| Form 990-PF | A separate return for private foundations |
Exactly US$200,000 in receipts or US$500,000 in assets fails the EZ test. Some organisations cannot use the EZ even when they meet the size tests:
- Donor-advised fund sponsors
- Hospital operators
- Group-return parent organisations
Foreign and US-territory organisations generally use worldwide receipts and assets for the EZ test.
Also check exceptions, amended-return rules and group-return rules against the current forms.
How to Complete Schedule O for Form 990
Start with the instructions and a working list
Read every Form 990 question that asks for an explanation. Then build a simple tracker with:
- Part and line number
- The question and the explanation required
- Supporting records
- The person responsible for the facts
Use precise part and line references
Complete the main return line first. Then identify the Part and line for each explanation and follow the return's order. Use as many continuation sheets as needed, and keep the organisation's name and EIN on each.
For amended returns, identify every amended Part, schedule and line. A late-filing reasonable-cause statement does not go on Schedule O.
Know what the 2025 instructions list
| Form 990 Part | Items that need explanation |
|---|---|
| III, Program services | Lines 2 and 3 "Yes" answers (new or changed activities); line 4d other program services |
| V, Other IRS filings | Line 3b "No"; line 13a; line 14b "No" |
| VI, Governance | Lines 1a, 2-7b, 9, 12c "Yes"; 8a, 8b, 10b "No"; 11b; 15a and 15b; 18; 19 |
| VII, Compensation | Reporting only the related period; efforts to obtain related-organisation data |
| IX, Expenses | Line 11g and line 24e if each exceeds 10% of line 25 |
| XI, Net assets | Line 9 other changes |
| XII, Financial reporting | Line 1 accounting method; 2c oversight change; 3b "No" |
Only Part VI 11b and 19 apply to every filer. Most others depend on answers or amounts.
Write each section well
Program services (Part III). State what changed, when, who benefited and how it ties to the exempt purpose. Use the organisation's records, not vague mission language.
Governance and compliance (Parts V and VI). Match the explanation to the exact question. A conflict-of-interest answer should describe the procedure, not wander into unrelated board commentary.
Compensation, expenses, net assets, financial reporting. Reconcile every narrative to the figures reported elsewhere. If "other expenses" exceed the 10% threshold, itemise type and amount.
Handle attachments, amendments and unusual events
Where a narrative needs a policy, chart or reconciliation, refer to it briefly.
For an amendment, the IRS requires a complete amended return with required schedules, with Schedule O showing what changed.
When an unusual event affects the return, describe the event, period, corrective action and effect. Do not speculate about how the IRS will respond.
How to Complete Schedule O for Form 990-EZ
Identify what triggers it
Work through the 990-EZ instructions and flag each response that requires an explanation. Do not copy the full Form 990 checklist. The parts and questions differ.
Financial and balance-sheet items
Part I lines that commonly need an explanation:
- Line 8: other revenue
- Line 10: grants and similar amounts paid
- Line 16: other expenses
- Line 20: other changes in net assets
Part II lines:
- Line 24: other assets
- Line 26: total liabilities
Describe the nature and source of each item and tie it to the reported figures.
Program services and other information
- Part III, line 31: other program services
- Part V, lines 33 and 34: explain "Yes" responses
- Part V, line 35b: explain missing income reporting
- Part V, line 44d: explain a "No" response
- Heading item B: for amended returns, identify the amended parts and schedules
The EZ instructions abbreviate some references (35 and 44). The Schedule O instructions specify 35b and 44d. Verify against the form for your tax year.
Review, Disclosure, and Professional Assistance
Gather information and draft carefully
Pull in finance, programme, governance, HR, legal and executive staff where their records support an answer. Set an internal deadline for facts, draft review and sign-off before the return is signed.
When drafting:
- Answer the exact question first, then add only the facts needed
- Include dates, policies and corrective actions
- Avoid defensive language, marketing tone and unsupported claims
- Make sure nothing contradicts the financial statements or governing documents
Reconcile with the rest of the return
Compare names, EIN, tax year, dates, amounts, programme descriptions and governance answers across the whole filing. Check last year's explanations for copy-forward errors. Confirm that information on another schedule is not duplicated or contradicted on Schedule O.
Protect privacy in a public filing
The IRS says annual returns include all schedules and attachments, and Schedule O is marked "Open to Public Inspection." Organisations generally must make returns available for three years.
- Never include Social Security numbers, as the instructions state
- Leave out private contact details, bank information and passwords
- Check every attachment and continuation page before submission
- Keep supporting records internally
Contributor names and addresses are generally withheld for public charities, but that is not confidentiality for the whole return.
Know when to get help
Qualified support makes sense for:
- Complex related-party transactions
- Foreign activities or ownership (Part IV 14b triggers at more than US$10,000 in foreign activity or US$100,000 in foreign investments)
- Amended returns
- Missing records or significant governance changes
- Unusual financial movements
- Doubt about which schedule applies
For organisations needing US-compliant tax, accounting and compliance support, VJM Global's CPAs and accounting professionals work on American standards and handle federal, state and local filings. Confirm whether Form 990 or Schedule O preparation is within their scope before engaging.
Frequently Asked Questions
How much does it cost to file a 990-EZ?
Cost varies with whether you self-prepare, use e-filing software or hire a professional. Keep any provider fee separate from an IRS charge, and check current pricing with your chosen provider and the IRS.
Is Schedule O required for 990-EZ?
Only when your answers or the instructions require an explanation. Unlike full Form 990 filers, EZ filers have no automatic attachment rule.
Who is required to file Form 990-EZ?
Eligible organisations with gross receipts under US$200,000 and year-end assets under US$500,000, excluding categories such as hospital operators and donor-advised fund sponsors. Verify current thresholds and exceptions.
What is the IRS Form 990 Schedule O?
It is the attachment for supplemental explanations of specified answers on Form 990 or 990-EZ. It is not the Form 5471 Schedule O.
What does 990 mean?
"990" refers to the IRS series of annual information returns for tax-exempt organisations. Versions include Form 990, 990-EZ, 990-N and 990-PF for different filing situations.
What are Schedules A, B, D, E, F, and H?
They are separate Form 990 schedules covering public charity status, contributors, financial statements, schools, foreign activities and hospitals. Schedule O adds explanations. It does not replace them.
