Average audit fees for private companies in the United States run from about $10,000 to $100,000 a year, with revenue size, operational complexity, and the accounting firm you hire deciding where in that range you land. A very small business with clean books might pay $10,000 to $25,000, while a mid-sized company with $50 million or more in revenue routinely sees fees climb past $75,000. Those numbers keep drifting upward as labor costs rise and accounting standards get more demanding, so knowing what goes into the price helps you budget honestly and push back when a quote feels high.
What Private Companies Actually Pay by Revenue Tier
No single average tells you much, because a $3 million family business and a $200 million private-equity-backed platform have almost nothing in common from an auditor’s perspective. Segmenting by revenue is the only way benchmarks make sense.
- Under $5 million in revenue. Most audits in this tier fall between $10,000 and $25,000. Financial statements are usually straightforward, transaction volume is manageable, and a small team can handle the engagement. The lower end is for simple operations with clean books; the higher end is for businesses with inventory, multiple revenue streams, or weak record-keeping.
- $5 million to $50 million in revenue. Expect $25,000 to $75,000. Companies at this level often run across multiple locations, carry inventory, or have intercompany transactions that require more testing. The audit team grows and more senior staff get involved.
- Over $50 million in revenue. Fees typically start around $75,000 and can reach well into six figures. At this scale you likely have complex revenue recognition, significant balance-sheet estimates, and enough transaction volume to require extensive sampling. Private-equity-backed companies often pay at the higher end because their investors and lenders demand more rigorous procedures.
Industry matters almost as much as size. A professional services firm costs less to audit than a manufacturer with complex inventory costing, a construction company using percentage-of-completion accounting, or a financial services firm subject to regulatory examination. Specialized industries need auditors with niche expertise, and that expertise commands a premium.
What Drives One Company’s Fee Higher Than Another’s
Two companies with identical revenue can receive quotes that differ by 50% or more. The gap comes down to how many hours the auditors need, which depends on a handful of characteristics — most of them within your control.
Operational Complexity
Every additional layer adds hours. Multiple legal entities, intercompany eliminations, foreign operations with currency translation, acquisitions that require purchase price allocations and goodwill impairment testing, related-party transactions that need extra disclosure work. A $30 million company that just closed two acquisitions costs meaningfully more to audit than a $30 million single-entity business that has been stable for years.
Quality of Internal Controls and Records
This is where most of the controllable cost sits. When your books are clean, reconciliations are current, and supporting documentation is organized, auditors can test controls efficiently and cut back on individual transaction testing. Weak controls force the opposite approach: the auditor digs into far more individual transactions to get comfortable, and every hour of that detailed testing shows up on your invoice. Handing auditors a box of unsorted receipts instead of a structured trial balance with tied-out schedules is essentially choosing to pay a premium.
Accounting Standards Complexity
Some standards require significant management judgment, and auditors have to independently evaluate those judgments. Lease accounting under ASC 842 puts most leases on the balance sheet, creating new calculations the auditor has to verify. Revenue recognition under ASC 606 requires detailed analysis of contract terms and performance obligations. Any time management makes an estimate — fair value measurements, allowances for credit losses, contingent liabilities — the auditor spends time testing the assumptions and methodology.
Which Firm You Hire
The tier of accounting firm has a direct impact on pricing. The Big Four firms (Deloitte, EY, KPMG, PwC) charge the highest rates and are rarely engaged for straightforward private company audits unless the company is very large or preparing for a public offering. Large national and regional firms occupy the middle. Local and mid-sized firms typically offer the most competitive pricing for companies under $50 million in revenue. Geography matters too: hourly rates in New York, San Francisco, and Chicago run higher than in smaller metros.
First-Year vs. Recurring Engagements
The first year with a new firm is almost always more expensive. The auditor has to learn your business, evaluate your internal controls from scratch, and establish opening balances. Recurring engagements benefit from accumulated knowledge, which cuts planning time and lets the team focus on changes from the prior year. Expect the first-year fee to run noticeably higher, with the engagement stabilizing in year two or three.
How Firms Structure the Bill
At the core, an audit fee is hours times hourly rates. But the billing structure and staffing decisions matter more than most clients realize.
Most recurring private company audits are quoted as a fixed fee, giving you cost predictability. The engagement letter typically lets the firm adjust the fee if unexpected issues arise: a restatement of prior-period financials, a newly discovered fraud, or a significant acquisition completed late in the year. First-year audits and engagements with uncertain scope more often run on time-and-materials, where you pay for actual hours. On an hourly arrangement, ask for a not-to-exceed cap or at least a commitment to notify you when hours reach a set percentage of the estimate.
The people assigned to your audit span a wide range of billing rates. Staff accountants, the most junior team members handling much of the detailed testing, typically bill $150 to $250 per hour. Seniors and managers, who supervise fieldwork and review workpapers, usually fall between $200 and $400. Partners, who sign the opinion and handle the most complex judgments, bill $300 to $500 or more depending on firm and market. The blend of these rates, weighted by how many hours each level spends on your engagement, determines the effective hourly cost. A well-run audit staffs the majority of hours at the staff and senior level, with partner time limited to review, planning, and complex issues.
Watch the out-of-scope charges. The engagement letter defines what’s included; anything outside it (researching a new accounting standard, advising on a transaction, restating prior-year financials) gets billed separately, often at the firm’s full standard rate with no discount built into the base audit fee. These charges add up quickly and tend to catch clients off guard. Read the engagement letter carefully and ask your audit partner to flag potential out-of-scope issues early rather than after the hours are already in.
Do You Actually Need an Audit?
Private businesses have no blanket federal requirement to be audited. Audits usually get triggered by outside parties: bank loan covenants for larger credit facilities, private equity and venture capital investors demanding annual audits of portfolio companies, or buyers and underwriters requiring two to three years of audited historicals before a sale or IPO. Separate rules can require audits of employee benefit plans, recipients of federal grants, and certain nonprofits, but those are distinct engagements with their own fee structures.
If your lender or stakeholders will accept a lower level of assurance, you can save substantially by opting for a review or compilation instead.
- Compilation. The CPA assembles your financial data into standard statement format and provides no assurance that the numbers are accurate or complete. This is the cheapest option, typically $1,000 to $5,000 for a small business. It’s essentially a formatting service, useful when you need presentable financials but nobody is relying on them for lending or investment decisions.
- Review. The CPA performs analytical procedures and inquiries to provide limited assurance that no material modifications are needed. Reviews often run $4,000 to $15,000 and take less time than an audit. Many lenders accept reviewed financials for smaller credit facilities.
- Audit. The CPA performs detailed testing of transactions, balances, and internal controls to provide a high level of assurance that the financial statements are fairly presented. This is the most rigorous and expensive engagement, starting around $10,000 for the simplest businesses and scaling from there.
Ask your lender or investor what level of assurance they actually require before assuming you need a full audit. Switching from an audit to a review where acceptable can cut your annual accounting cost by half or more.
How to Bring the Fee Down
You can’t eliminate the audit, but you can meaningfully influence the fee by controlling the variables that drive hours.
- Prepare before fieldwork starts. Complete all account reconciliations, close the books, and organize supporting documentation before the auditors arrive. Every hour your team spends searching for invoices during fieldwork is an hour the audit team is sitting idle, and you’re still paying for it. Handing over a complete set of schedules and support on day one is the single highest-impact thing you can do.
- Designate a capable internal point person. One knowledgeable contact who can answer questions and route requests keeps the engagement moving. When auditors have to chase five different department heads for basic information, the hours pile up fast.
- Invest in your internal controls. Strong controls pay for themselves. When auditors can rely on your controls, they reduce the volume of detailed transaction testing. This doesn’t mean building an internal audit department; it means documented procedures, proper segregation of duties, and consistent reconciliations.
- Use accounting software that supports clean data extraction. Modern ERP systems and cloud accounting platforms let auditors pull structured data files directly, replacing hours of manual sampling and spreadsheet requests. If your auditor has to manually test every journal entry because your system can’t produce a clean export, you’re paying for that inefficiency.
- Manage scope proactively. Raise potential issues with your auditor during planning, not after they’ve already spent hours investigating. If you know about a complex transaction or an accounting policy change, bring it up early so the firm can plan rather than react.
- Time the engagement strategically. Most audit firms are slammed January through April. Scheduling fieldwork in the summer or early fall, if your fiscal year-end allows, gives you better leverage on pricing and typically gets you a more experienced, less overextended team.
- Solicit competitive bids periodically. You don’t need to switch firms every few years, but a competitive proposal every three to five years keeps your incumbent honest. Audit fees creep up annually through small scope additions and rate increases that compound.
The common thread: your fee is partly a reflection of how audit-ready your organization is. Companies that treat the audit as a collaborative process consistently pay less than those scrambling to get their books in order after the auditors have already started.
Where Fees Are Heading
Audit fees have been rising steadily and outpacing general inflation. Average fees for publicly traded companies reached a record $3.26 million in 2024, a 9% jump from the prior year. Private company fees aren’t reported at the same level of detail, but they respond to the same pressures: a persistent shortage of accountants entering the profession, rising salaries needed to retain experienced staff, and accounting standards that keep expanding in complexity. The 2023 data showed a 6.4% average increase, and the trend has only accelerated. If your audit fee has been flat for several years, expect your firm to push for a meaningful increase at renewal.