Mullins P.C.

Mullins P.C. says it provides its services exclusively for small and mid-sized nonprofit organizations. Mullins P.C. is based in Bethesda, Maryland. Use this page to see what it offers and what to ask before you hire a nonprofit audit firm.

Services

• Audits and attestation
• Tax preparation
• Advisory

About the firm

Mullins P.C. says it was founded to serve small and mid-sized nonprofits exclusively. Its team page lists 13 people, 10 of them CPAs, led by managing partner John Mullins, and the firm says its staff average 19 years of nonprofit audit experience.

Who it works with

Mullins describes itself as a fully remote firm with more than 600 clients nationwide, including charities, foundations, associations and membership organizations. Audits for clients outside its home region are done entirely remotely.

Services and how engagements work

The firm performs more than 240 audits and reviews and more than 550 Form 990s a year, according to its site, including Single Audits under the Uniform Guidance. Audits start with an upfront document list and most run several weeks from kickoff to final report. Advisory services, such as internal control reviews, audit and 990 readiness checks, board training and grant cost allocation, can be bought on their own. Mullins does not offer bookkeeping or outsourced CFO services.

Fees

Mullins quotes a flat fee upfront based on size, complexity and funding sources, and says it does not bill by the hour.

Free resources from the firm

• Complete guide to Form 990
• When your nonprofit has outgrown its bookkeeper

Firm details checked on its website on October 7, 2026.

Before you hire an auditor

• License in your state. Audits are performed by licensed CPA firms. Confirm the firm can practice in your state, especially if it works with you remotely.
• Peer review. Ask for the firm’s most recent peer review report.
• Single Audit. If your organization expends $1,000,000 or more in federal awards in a fiscal year, it needs a Single Audit under 2 CFR 200.501. Ask whether the firm performs them.
• Scope and fee. Ask what the engagement letter covers (audit, Form 990, management letter) and how the fee is set.

Details come from the Mullins P.C. website, checked October 3, 2026.

Federal single audit record

The Federal Audit Clearinghouse, the federal government’s public database of single audits, lists Mullins P.C. as the auditor on 39 single audits of nonprofit organizations for fiscal years 2021 through 2025. The audited organizations were in the District of Columbia, Maryland, Virginia, New York and 2 other states.

Those organizations reported between $793K and $7.8 million in federal award spending for the year audited (median $1.5 million). The single audit threshold was $750,000 in federal awards spent for fiscal years starting before October 1, 2024, and is $1,000,000 for fiscal years starting on or after that date (how the threshold works).

The largest organizations in the 2025 records include Community Crisis Services, Inc., React DC Inc, Christ House, La Isla Network, Inc., Asylumworks Inc and Society for Research in Child Development, Inc. These are public filings, not client endorsements.

Counted from FAC records on October 7, 2026, one report per organization per year. Recent years are incomplete: a single audit is due nine months after the fiscal year ends.

Small and mid-sized nonprofits anywhere in the U.S. that want a fully remote audit or Single Audit with a flat, upfront fee.

Mullins quotes a flat fee up front, doesn't bill by the hour and says its staff average 19 years of nonprofit audit experience.

Good fit if: You want a remote audit or Single Audit anywhere in the U.S. with a flat fee and no hourly billing.

Watch for: No bookkeeping or outsourced CFO services; no dollar figures published.

Nonprofit single audits on record: 39 (D.C., Maryland and Virginia)

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