How a CPA Firm’s Position Shapes CAS Outcomes

In a typical client advisory services (CAS) engagement, the firm operates on a periodic cadence, which looks something like this:

The firm closes the client’s books, delivers financial reports, conducts a scheduled review, and offers commentary on what the numbers indicate. Between cycles, the client initiates communication, and the firm responds to the client’s questions and reviews their materials.

The engagement’s deliverables are reports and recommendations, which arrive after the operating period closes. These include:

• Financial statements, which record what happened.
• Advisory emails and narratives, which interpret results and identify issues for the client’s leadership team to address.
• Tax planning summary documents, which outline positions and timelines.

Accountability sits at the recommendation. The firm reviews decisions the client has already made and recommends adjustments to the client’s internal team who’ll either execute them or not. Whether the recommendation reaches implementation—and what happens once it does—rests with the client’s internal team.

This is the typical CAS engagement most clients receive.

Why CAS Limitations Persist

Most certified public accountants (CPAs) recognize the limitations of this CAS structure, yet, the practice persists—and mostly for reasons that operate inside the firm itself.

That’s because the CAS engagement fits the firm’s commercial and operating infrastructure. Hourly billing and scheduled fixed-fee retainers match the firm’s timekeeping systems and realization benchmarks. Traditionally, CAS sits alongside tax and audit and inherits the host environment’s conventions.

CAS engagements also fit the CPA career path. For instance, CPAs develop through technical specialization and interpretive judgment delivered periodically, which reinforces an identity built on expertise applied at scheduled intervals—not sustained, continuous operational accountability.

The language used reinforces the structure as well. Conferences, publications, and firm marketing materials often use phrases like “advisory expansion” to describe the field’s direction forward. This vocabulary signals to clients what to expect from the engagement and signals to CPAs what the established path to advancement looks like.

Notably, the typical CAS engagement is durable because the structures supporting it—economic, professional, and rhetorical— are coherent on their own terms. Firms operating inside those structures aren’t failing to understand what their clients need. Instead, the structure defines what the engagement can be.

Where CAS and Execution Diverge

Of course, there are a couple different ways CAS can be positioned:

• From outside the operation. The firm sees the operation through the materials the client has organized for review (e.g., trial balance, variance commentary, and issues raised in scheduled meetings). Observation is calibrated to the cadence of those materials, and access is calibrated to what the client chooses to share. After that, participation in operating decisions occurs through recommendations.
• From inside the operation. The firm sees the operation as it forms. Observation is continuous, and access is calibrated to what the function consists of, not to what the client surfaces for review. Participation in operating decisions occurs as the decisions are made.

In both of these positions, the CPAs are credentialed and capable, but they operate from different places relative to the client’s operation. From outside, the firm sees the consequences of operating decisions.

From inside, the firm sees the decisions as they form. Where the firm operates relative to the client, determines what the engagement can see, participate in, and be accountable for. Position determines what the engagement can’t reach as much as what it can. The same firm could operate from both positions with the same CPAs, but the engagements would produce different conditions because the engagements are structurally different.

Why Daily Execution Is a Differentiator

Daily execution is a structural posture defined by where the firm operates, what the firm owns, and what the firm is accountable for.

It begins with function ownership. In this case, controllership is the baseline: the financial close cycle, internal controls, accruals, reconciliations, and disciplines that produce the financial reporting the organization runs on. Beyond controllership, additional functions are receivables, payables, payroll, cash management, tax compliance, executive planning support, and board reporting.

Daily execution operates continuously. The CPA running the function makes the daily decisions the function requires as they arise, not at scheduled reviews. Observation is continuous because the function is being operated continuously.

At my firm, every monthly fixed-fee engagement is structured around process ownership, with fees calibrated to what the firm owns. For instance, the work the firm owns is operated by the firm. The work outside the firm is governed by a parallel hourly statement of work with the client’s explicit consent.

All in all, daily execution is a set of structural commitments that operate together: ownership of named processes, continuous presence, real-time participation in decisions, and accountability for what the function delivers.

What Daily Execution Produces

When the firm operates from inside the client’s operation, a set of structural conditions become available that a typical CAS engagement can’t produce. This includes:

• Visibility. The CPA running the daily execution function sees decisions, transactions, and structural conditions as they form, not after they surface in financial reporting.
• Judgment grounded in observation. The CPA’s interpretation rests on the function’s actual cadence (e.g., the daily decisions, operational trade-offs, and interactions between systems and people), not only on what arrives in the variance commentary at month-end close.
• Proximity to decisions. The CPA running the daily execution function participates in operating decisions when assumptions can still be questioned and alternatives can still be considered (i.e., the client’s leadership team involves the CPA in the conversation while decisions are being made, rather than receiving a recommendation once the conversation has ended).
• Accountability that’s tied to what the function produces. Accountability that follows from ownership is structurally different from accountability for a recommendation. This means that the firm owns whether the daily execution function meets its commitments.

The Position Determines the Outcome

Ultimately, CPAs considering how to structure their CAS practices are choosing between positions, each producing distinct outcomes defined by where the firm operates from. The choice of position is structural—and so are the consequences.