Few documents carry as much weight for a nonprofit as its annual nonprofit audit report. To many board members and executive directors, it can feel like a complex book written in accounting jargon. But this report is more than a compliance hurdle—it is a powerful tool for transparency, accountability, and smarter decision-making. This guide explains what a nonprofit audit report is, how it differs from a review or compilation, when your organization actually needs one, what it costs, how to prepare, and how to read every section with confidence.
What Is a Nonprofit Audit Report?
A nonprofit audit report is the formal, written opinion an independent certified public accountant (CPA) issues after examining your organization’s financial statements. The auditor evaluates whether those statements present your finances fairly, in all material respects, and in accordance with generally accepted accounting principles (GAAP). The report does not certify that your books are perfect or that fraud is impossible—it expresses a professional opinion on whether the statements are free from material misstatement.
For nonprofits, the audit report is often required by funders, grantmakers, lenders, state charity regulators, and the board itself as evidence of financial integrity. It is also one of the clearest signals of good stewardship you can show donors and the public.
Audit vs. Review vs. Compilation: Know the Difference
An audit is the highest level of assurance a CPA provides, but it is not the only option. Nonprofits often choose a review or a compilation when an audit isn’t required or isn’t affordable. Understanding the three levels helps you match the engagement—and the cost—to what your funders and board actually need.
- Audit (highest assurance): The CPA independently tests transactions, confirms balances, evaluates internal controls, and issues an opinion on whether the financial statements are fairly presented.
- Review (limited assurance): The CPA performs analytical procedures and inquiries—but no detailed testing—and provides limited (or “negative”) assurance that nothing came to their attention requiring material changes. It costs less than an audit.
- Compilation (no assurance): The CPA assembles your financial data into proper statement format without verifying it or expressing any opinion. It is the least expensive option and is often used internally or for smaller organizations.
If a grantor simply asks for “audited financials,” a review or compilation will not satisfy the requirement—so confirm the exact level of assurance expected before you engage a firm.
When Does a Nonprofit Need an Audit?
There is no single federal rule that requires every charitable nonprofit to be audited. Instead, the requirement usually comes from one of four sources:
- State law. Many states require an independent audit once a nonprofit’s annual revenue or charitable contributions exceed a set threshold (often in the range of $250,000 to $1 million, depending on the state). The National Council of Nonprofits maintains a helpful 50-state chart of audit requirements.
- Federal funding (the Single Audit). Nonprofits that spend $1 million or more in federal awards in a fiscal year must obtain a Single Audit under the Uniform Guidance. We cover the current threshold in detail in our guide to changes in Single Audit requirements and thresholds.
- Funders and lenders. Foundations, major donors, and banks frequently require audited financial statements as a condition of a grant or loan, regardless of state thresholds.
- Your own bylaws or board policy. Many boards voluntarily commission an annual audit to strengthen governance, even when no law requires it.
Note that filing IRS Form 990 is a separate annual obligation and is not the same as an audit—Form 990 even asks whether your financial statements were audited, reviewed, or compiled. To weigh the options before committing, see the Council’s overview of whether your nonprofit needs an independent audit.
How Much Does a Nonprofit Audit Cost?
Audit fees vary widely with the size and complexity of the organization, but most small to mid-sized nonprofits can expect to pay somewhere between roughly $5,000 and $20,000 for an annual financial statement audit. Larger nonprofits, or those requiring a Single Audit of federal funds, often pay considerably more. The biggest cost drivers are:
- Total revenue, number of funding sources, and transaction volume
- Quality of your bookkeeping and the strength of internal controls
- Whether a Single Audit (federal compliance testing) is required
- How well-organized your records are when the auditors arrive
The single most effective way to control cost is to be well-prepared—clean, reconciled books and complete supporting documentation reduce the hours an auditor must bill. A review or compilation, where acceptable, is also markedly less expensive than a full audit.
How to Read Your Nonprofit Audit Report
Once the engagement is complete, you’ll receive a packet with several distinct parts. Here is what each one tells you.
The Auditor’s Opinion
This is the heart of the report. There are four possible opinions:
- Unmodified (“clean”) opinion: The statements are fairly presented in accordance with GAAP. This is the result you want.
- Qualified opinion: The statements are fairly presented except for one specific issue the auditor identifies.
- Adverse opinion: The statements are materially misstated and should not be relied upon.
- Disclaimer of opinion: The auditor could not gather enough evidence to form an opinion at all.
If you’d like to see what a standard report looks like, the AICPA publishes illustrative auditor’s reports and auditing standards that auditors follow.
The Financial Statements
These include the Statement of Financial Position (balance sheet), Statement of Activities, Statement of Cash Flows, and Statement of Functional Expenses. Together they show your organization’s financial health, performance, and how resources are used across programs and overhead.
Notes to the Financial Statements
The notes provide context—explaining accounting policies, donor restrictions, commitments, contingencies, and other details that help readers understand the numbers. Experienced reviewers often read the notes first.
The Management Letter
This optional document, separate from the opinion, highlights internal control weaknesses or operational inefficiencies the auditor observed. Treat it as a free roadmap for strengthening your finance function.
Nonprofit Audit Preparation Checklist
Preparation is what keeps an audit on time and on budget. Work through this checklist before fieldwork begins:
- Reconcile every bank, investment, and credit card account through year-end.
- Close the books and produce draft financial statements for the fiscal year.
- Assemble supporting documentation: grant agreements, major contracts, leases, and board minutes.
- Schedule fixed assets, prepaid expenses, accrued liabilities, and deferred revenue.
- Document how you classified net assets with and without donor restrictions.
- Respond promptly to the auditor’s prepared-by-client (PBC) request list.
For a deeper walkthrough, read our companion guide on preparing for your nonprofit audit.
Why Your Audit Report Matters
Understanding your nonprofit audit report helps you:
- Build trust with donors, grantmakers, and stakeholders
- Identify areas for financial improvement
- Strengthen internal controls and reduce fraud risk
- Support strategic planning, budgeting, and board governance
The same transparency that funders look for in an audit also strengthens your public reporting—see our guide to building a comprehensive, transparent financial report. Engage with your auditor by asking questions throughout the process, educate your board on the findings, and use the report proactively rather than filing it away. A nonprofit audit report isn’t just a formality—it’s a reflection of your organization’s commitment to stewardship, and understanding it empowers you to fulfill your mission with confidence.
Frequently Asked Questions
When does a nonprofit need an audit?
A nonprofit typically needs an audit when state law requires one above a revenue or contributions threshold, when it spends $1 million or more in federal awards (triggering a Single Audit), or when a funder, lender, or its own bylaws require audited financial statements. There is no universal federal rule mandating an audit for every charity.
What is the difference between an audit, a review, and a compilation?
An audit provides the highest level of assurance, with the CPA testing transactions and issuing an opinion on whether the statements are fairly presented. A review provides limited assurance through analytical procedures and inquiry, with no detailed testing. A compilation provides no assurance—the CPA simply formats your data into financial statements without verifying it.
How much does a nonprofit audit cost?
Most small to mid-sized nonprofits pay roughly $5,000 to $20,000 for an annual audit, though costs rise with revenue, complexity, and federal Single Audit requirements. Clean, well-organized books are the most effective way to keep fees down.
What does a clean audit opinion mean?
A clean—or “unmodified”—audit opinion means the auditor concluded that your financial statements are presented fairly, in all material respects, in accordance with GAAP. It is the best possible result and signals strong financial reporting to donors, funders, and your board.
