The First 90 Days with a Fractional CFO

The question I hear most often from business owners who have decided to engage a fractional CFO is not about fees or credentials — it is about what happens next. What does the first 90 days actually look like? What should I expect? What do I need to prepare? How will I know if it is working?

These are the right questions. The first 90 days of a fractional CFO engagement set the trajectory for everything that follows. Done well, they establish the trust, the working rhythm, and the shared understanding of priorities that make the engagement genuinely valuable. Done poorly, they produce a lot of activity with limited impact — and a business owner who is not sure what they are paying for.

Here is what the first 90 days should look like, based on how I approach every new engagement.

Days 1–30: Understand Before You Act

The first month is not about delivering recommendations. It is about understanding the business well enough to make recommendations that are actually useful.

That means getting into the financials — not just the most recent statements, but the history. How has revenue trended? Where do margins compress? What does the cash conversion cycle look like, and how does it behave across seasons or economic cycles? What are the covenants on the debt, and how much headroom does the business actually have?

It also means understanding the people. Who runs finance day-to-day? What is their capability, and where are the gaps? What does the CEO actually worry about at night — and is that the same thing the financials suggest they should be worried about? The answers to those questions are rarely identical, and the gap between them is often where the most important work lives.

In the first 30 days, I am also building a picture of the advisor ecosystem. Who is the banker, and what is the quality of that relationship? Who is the external accountant, and are they adding strategic value or just filing returns? Are there gaps in the advisory team that need to be filled?

The output of this phase is not a polished report. It is a clear-eyed view of where the business stands, what the most important financial risks and opportunities are, and where the fractional CFO's time will deliver the most value. That view needs to be shared explicitly with the CEO — and it needs to be honest, even when the honest answer is uncomfortable.

Days 31–60: Establish the Rhythm

The second month is about building the operating rhythm that will carry the engagement forward. This means establishing a regular reporting cadence, a meeting structure, and a set of shared metrics that the CEO and the fractional CFO will use to track performance and make decisions.

Reporting that actually drives decisions

One of the most common problems I find in growing businesses is reporting that is technically accurate but strategically useless. The monthly package shows what happened — revenue, expenses, variance to budget — but it does not tell the CEO what to do about it. It does not highlight the two or three things that actually matter this month. It does not connect the financial results to the operational decisions that drove them.

By the end of month two, the reporting should be different. Not necessarily more complex — often simpler. But it should be designed to drive decisions, not just document history. The CEO should be able to read it in fifteen minutes and know exactly where to focus.

The banking relationship

If the business has a credit facility, month two is typically when I make contact with the banker — not because there is a problem, but because the relationship matters. Bankers who know their clients' CFO, who receive proactive communication, and who are not surprised by bad news are meaningfully more supportive when the business needs flexibility. That relationship is an asset, and it needs to be managed like one.

Quick wins

The second month should also produce at least one or two tangible improvements — a process that gets tightened, a reporting gap that gets closed, a covenant that gets renegotiated, a cash flow issue that gets addressed before it becomes a problem. These early wins matter not because they are the most important work, but because they demonstrate value and build the trust that makes the harder conversations possible later.

Days 61–90: Align on the Strategic Agenda

By the third month, the fractional CFO should have enough context to engage meaningfully on the strategic questions — not just the financial ones. What does the business need to look like in three years? What are the capital requirements to get there? Is the current structure — ownership, debt, corporate entities — fit for purpose, or does it need to evolve?

This is also the point at which the engagement model itself should be reviewed. Is the time allocation right? Are there areas where more depth is needed? Are there projects — a refinancing, an acquisition, a system implementation — that will require a different kind of engagement over the next six to twelve months?

Long-term business modelling

Day 61 to 90 is also when serious work begins on the long-term financial model. If the business does not have one, building it is a priority — not a polished deck for a board presentation, but a working model that connects revenue drivers to cash flow, maps capital requirements against growth scenarios, and gives the CEO a clear view of what the business needs to look like financially over the next three to five years. A business operating without this model is navigating without instruments.

If a model already exists, this phase is about honest assessment and refinement. Most models I encounter in growing businesses were built for a specific purpose — a bank presentation, a budget cycle — and have not been maintained as a living tool. The assumptions may be stale. The structure may not reflect how the business actually operates. The scenarios may not capture the risks and opportunities that matter most right now. Refining the model means rebuilding it around the decisions the CEO actually needs to make — not the ones that seemed important when the model was first built. By the end of the 90 days, the model should be something the CEO reaches for, not something that sits in a folder.

The 90-day mark is not a finish line. It is the point at which the engagement shifts from orientation to execution — from understanding the business to actively improving it. The CEO should feel, at the 90-day mark, that they have a genuine financial partner: someone who understands their business, who they trust to tell them the truth, and who is actively working on the things that matter most.

What the CEO Needs to Bring

The first 90 days work best when the CEO is an active participant, not just a recipient of analysis. That means a few specific things.

Access to the right people and information. A fractional CFO cannot do their job without access to the finance team, the banker, the external accountant, and the full financial history of the business. Gatekeeping — even well-intentioned gatekeeping — slows the process and limits the value.

Honest conversations about the hard things. Every business has financial issues that the CEO would prefer not to discuss — a covenant that is tighter than it looks, a customer concentration that creates real risk, a family member in a role they have outgrown. The fractional CFO needs to know about these things. They cannot help manage risks they do not know exist.

Patience with the process. The first 90 days are an investment. Some of the most valuable work — building the banking relationship, restructuring the reporting, establishing the strategic agenda — does not produce immediate, visible results. The CEO who understands this will get significantly more value from the engagement than the one who is measuring impact by the number of deliverables in the first month.

Common Mistakes in the First 90 Days

In my experience, engagements that struggle in the first 90 days tend to make one of three mistakes.

The first is treating the fractional CFO as a project resource rather than a leadership partner. Assigning a list of tasks — build a model, clean up the reporting, talk to the bank — without giving the fractional CFO the context and authority to actually lead the finance function produces limited results. The value of a fractional CFO is judgment, not execution. If you need execution, hire a controller.

The second mistake is under-communicating. A fractional CFO who is not in regular contact with the CEO — who is not in the room when important decisions are being made, who is not copied on the conversations that affect the financial picture — cannot do their job effectively. The engagement works best when the fractional CFO is treated as a member of the leadership team, not an external consultant who checks in once a month.

The third mistake is expecting the engagement to solve problems that predate it. A fractional CFO can help a business navigate a covenant breach, a cash flow crisis, or a difficult banking conversation — but those situations are harder and more expensive to manage than they would have been if the fractional CFO had been engaged six months earlier. The businesses that get the most value from the fractional model are the ones that engage proactively, not reactively.

Shawn's Take

I have started enough fractional CFO engagements to know that the first 90 days are where the relationship is made or broken. The businesses I have worked with most effectively are the ones where the CEO came in with a clear sense of what they needed, gave me the access and authority to do the work, and was willing to hear honest assessments — even when the honest assessment was that the business had a problem they had not fully acknowledged.

The fractional model works because it gives growing businesses access to the same quality of financial leadership that large enterprises take for granted — without the overhead of a permanent hire. But it only works if the engagement is structured to deliver real leadership, not just advisory support. The first 90 days are where that structure gets established. Get them right, and the engagement will deliver value that compounds over time. Get them wrong, and you will spend the rest of the engagement trying to recover ground you should have covered in the first three months.

If you are considering a fractional CFO engagement and want to understand what the first 90 days would look like for your business specifically, I am happy to have that conversation.