Audit firms don’t have a pricing problem. They have an execution problem. And until they see it, no amount of rate increases will fix their margins.
Ask any managing partner why their audit practice feels squeezed and you’ll get a familiar answer: clients won’t pay enough. Rates haven’t kept pace with complexity, competition holds pricing down, and the talent shortage makes everything more expensive. I’ve heard this from dozens of firm leaders over the past six years, and for a long time, I believed it too.
But when I started looking at the actual cost structure of audit engagements, talking to the people running them and mapping where their hours were going, the pricing narrative started to fall apart. The problem with a $100,000 audit isn’t that the fee is too low. The problem is that the cost of delivering it is artificially high, inflated by execution friction that has become so embedded in how firms operate that most leaders have stopped questioning it.
I want to walk through what I found, because I think it changes the conversation about audit economics in a way that matters for both firm leaders and the CFOs who depend on them.
The Data Tells a Different Story
The 2025 IPA Practice Management Report offers a window into how audit firms actually perform, and the numbers challenge the conventional wisdom about pricing. Personnel costs across the industry now average 49% of net revenue. The high-growth firms that are pulling ahead of their peers aren’t winning by charging dramatically more. Their personnel costs run closer to 43.5%. They’re winning because of how they deliver the work, not what they charge for it.
That five-and-a-half-point gap compounds meaningfully across a portfolio of engagements, pointing to something the industry’s pricing obsession tends to obscure. The numbers show that margin improvement doesn’t track with rate increases. It tracks with execution efficiency. The firms pulling ahead have found ways to deliver the same quality audit with less friction, while the rest of the industry keeps raising rates and wondering why the margin picture doesn’t improve.
Where the Money Actually Goes
When you map audit hours across engagements, the patterns are strikingly consistent. Large portions of every engagement are consumed by work that feels necessary but contributes minimal incremental professional judgment. Four categories dominate: source document structuring, workpaper-to-evidence matching, review that amounts to re-performance, and late-stage financial statement cleanup.
Together, these activities consume 65 to 90% of audit hours. On a $100,000 engagement where personnel costs run roughly $49,000, about half of that labor, approximately $26,000, is spent on execution rather than judgment. The breakdown is revealing: ● $8,000 to $10,000 on workpaper-to-evidence matching ● $4,000 to $6,500 on structuring source documents.
- $2,600 to $5,200 on review that is effectively re-performance.
- $2,600 to $3,900 on financial statement cleanup that should have been caught earlier in the process.
This is the hidden cost of the modern audit. Firms are paying for the friction created by manual, disconnected execution.
Why Hiring Doesn’t Fix It
When firms feel margin pressure, the instinctive response is to hire. Yet new hires inherit the same workflows, the same spreadsheets, and the same variability. Revenue per Full-Time Equivalent (FTE) has lagged inflation for years, not because people aren’t working hard, but because output doesn’t scale with headcount under the current model.
The numbers bear this out. Firms today average 11.8 FTEs per equity partner, a number that has barely moved year over year. Partners are logging 1,100 or more charge hours. Fifty-two percent of professionals are now non-CPAs, which increases review effort when execution is inconsistent. Capacity doesn’t break because demand grows. It breaks because execution doesn’t scale.
Experience improves judgment. It does not fix broken execution. Until execution itself becomes more consistent, adding people simply increases the surface area of the problem.
The Execution Gap and the AI Question
This is where the current conversation about AI in audit goes wrong. The industry is debating whether AI agents can replace auditors. That’s the wrong question. The right question is whether firms can standardize execution so that the judgment their people bring actually shows up in the margin.
There is an enormous difference between autonomous AI that produces confident conclusions in a black box and structured, auditable automation that makes execution repeatable and inspectable. The former creates a new risk category in a profession built on traceability. The latter changes the economics of the audit without lowering standards.
When execution is structured and connected, workflows become repeatable instead of reinvented engagement by engagement. Every step becomes inspectable rather than requiring the reviewer to reconstruct what happened. Review shifts from re-performance to exception handling. And judgment gets applied where it actually matters, on risk, on estimates, on the areas that require a senior professional’s expertise.
What the Math Looks Like
Across firms that have moved to structured, connected audit execution, we consistently see 40 to 60% reductions in manual execution hours, the equivalent of two to four FTEs of capacity unlocked across a portfolio of roughly 200 engagements, and review becoming genuinely exception-based rather than re-performance-based.
On a single $100,000 audit, that translates to $8,000 to $10,000 of margin reclaimed from execution friction. Same standards. Same audit quality. Same professional oversight. Radically different economics.
If personnel costs are 49% of revenue and execution represents roughly 26% of that revenue, reducing execution hours by just 30% creates approximately 3.8 points of margin expansion before accounting for capacity gains. That is not a theoretical exercise. It is a math problem with a known answer.
The CFO’s Stake in This
This isn’t just an audit firm problem. Every CFO has a stake in how audit economics evolve.
Audit outcomes are increasingly shaped by the technology stack underpinning the engagement. When execution is fragmented, evidence lives across disconnected systems, introducing risk, uncertainty, and unnecessary friction for finance teams during audit season.
The relationship between CFOs and their auditors has always been built on a handshake of trust: one side prepares the numbers, the other verifies them. That handshake has historically been manual, document-heavy, and slow. What technology makes possible, for the first time, is a shared environment where both sides work from the same evidence, the same standards, and the same audit trail. The handshake doesn’t go away. It gets a foundation you can actually audit.
CFOs who invest in clean, connected financial infrastructure don’t just experience smoother audits. They close faster, gain continuous visibility into their data, and reduce the manual workarounds that create risk during audit season. Organizations that get this right will find that audit stops being a disruption and starts being a continuous process that strengthens the business.
The Choice
Audit firms face a clear fork in the road. One path relies on pricing pressure, heroic effort, and headcount growth to protect margin. It works until it doesn’t. The other path focuses on standardizing execution, changing the cost per audit, and expanding capacity without hiring. For CFOs, the parallel choice is equally clear. Continue tolerating fragmented audit processes that eat time and introduce risk during the most scrutinized period of the financial calendar. Or push for connected infrastructure where the data, documentation, and judgment behind every number move together rather than breaking apart across tools and email chains.
The true cost of a $100,000 audit isn’t the fee. It’s the inefficiency both sides have learned to tolerate. And once that cost becomes visible, it becomes optional.
Isaac Heller is the President and co-founder of Trullion, an AI-powered accounting and audit platform. He has spent six years building technology for the accounting profession, working alongside Big 4 firms, Fortune 500 companies, and thousands of finance teams. Views are the author’s own.
