There’s a version of this story that plays out in boardrooms and finance offices across the country, and you’ve probably lived it. The VP of Tax moves on, or the company simply hasn’t gotten around to building a formal tax function yet, and without fanfare or official announcement, the CFO absorbs the responsibility. Tax joins the growing stack of obligations on a plate that was already full.
No one intends for this to become a long-term arrangement. But months pass, then quarters, and suddenly the CFO is the de facto tax decision-maker — reviewing returns they don’t have time to scrutinize, fielding questions from external advisors without institutional context, and signing off on positions they’re managing by instinct rather than expertise. Meanwhile, the actual work of the CFO – capital strategy, investor relations, board reporting, covenant compliance gets squeezed.
This isn’t a story about capability. Most CFOs are highly capable people. It’s a story about bandwidth, specialization, and what happens to organizations when the two go unaddressed.
The modern CFO role has expanded significantly. Today’s finance leaders are expected to be strategic partners to the CEO, primary liaisons to the board and investors, stewards of capital allocation, and operators managing everything from treasury to FP&A. The CFO who was once primarily a financial reporter is now a critical architect of business direction.
Adding tax oversight to this profile doesn’t just add a task, it adds a domain. Tax is a discipline with its own regulatory landscape, its own evolving standards (think Pillar Two, state tax reform, evolving transfer pricing expectations), and its own strategic leverage points. Staying current requires time and focused attention that most CFOs simply cannot spare without something else suffering.
The honest result? Tax becomes reactive. Decisions get made at the last possible moment. Strategic opportunities – entity restructuring, credits and incentives, M&A positioning go unexamined because there’s no one at the leadership level with the bandwidth to look for them.
When a CFO is the default tax leader, the organization typically ends up operating in compliance mode – getting returns filed, staying out of obvious trouble without the strategic layer that turns tax from a cost center into a function that actively supports business goals.
Here’s what tends to fall through the cracks:
Strategic tax planning requires forward-looking analysis: how will a new acquisition affect the consolidated tax position? What’s the optimal structure for entering a new jurisdiction? These conversations don’t happen organically — they require someone whose job it is to ask the questions before the decisions are made.
Tax intersects with finance, legal, HR, operations, and M&A. Without a dedicated tax leader facilitating those conversations, important tax implications often surface too late — after the deal is structured, after the entity is formed, after the equity plan is approved.
Audit-ready documentation, transfer pricing policies, intercompany agreements — these are the kinds of foundational materials that prevent costly problems down the road. Without dedicated ownership, they either don’t exist or exist in forms that wouldn’t survive scrutiny.
Who is managing the relationship with the outside CPA firm? Who is evaluating whether the tax technology stack is still fit for purpose? In a CFO-as-tax-leader arrangement, these questions often go unasked.
As we’ve explored in our piece on The Real Cost of Not Having a Tax Leader, the consequences extend well beyond missed filings, they show up in audit exposure, M&A friction, and strategic blind spots that compound over time.
It would be easy to frame this as a criticism of CFOs who have absorbed tax oversight. It isn’t. It’s a critique of the organizational gap that creates the situation in the first place.
Tax is a specialized executive function. It deserves dedicated leadership, not as a prestige question, but because the discipline genuinely requires focused, senior-level attention to be done well. A growing company that would never ask its CFO to also serve as General Counsel is doing something structurally equivalent when it asks the CFO to own the tax function without support.
The good news is that the solution doesn’t require a full-time executive hire. For many organizations, that’s simply not the right answer at this stage – the cost is too high, the search takes too long, and the role may not yet justify a permanent seat at the leadership table.
What organizations in this position actually need is executive-level tax leadership that integrates with the business without requiring a permanent hire. That’s precisely what a fractional VP or Director of Tax provides.
In a well-structured fractional arrangement, the tax leader takes on genuine ownership, not just an advisory relationship. They embed into the finance team’s workflows, participate in strategic planning conversations, manage external advisors, and build the foundational infrastructure the tax function needs to operate well. The CFO gets a real hand-off, not a consultant they have to brief and manage.
The difference this makes isn’t just operational. CFOs consistently report that having dedicated tax leadership changes how they show up to board conversations about tax, instead of managing uncertainty, they’re reporting with confidence. Instead of absorbing questions they can’t fully answer, they have a trusted expert who can.
For companies in growth mode, this is particularly important. As your business scales, tax complexity scales with it – new entities, new jurisdictions, new compliance obligations. A CFO trying to manage that trajectory while also doing the CFO’s job is a risk factor, not a strategy.
We’ve worked with a number of finance leaders in exactly this situation, and the consistent theme is relief, not because the CFO couldn’t handle tax, but because they finally had the right structure in place to handle it properly. If you’re curious about what building that structure looks like in practice, our piece on How to Build a Corporate Tax Function Without Hiring a Full-Time Tax Leader walks through the approach in detail.
Tax deserves its own leadership. Not because CFOs aren’t capable, but because the business is better served when each function has the focused attention it requires. When a CFO is carrying tax as an unofficial second portfolio, neither role gets what it deserves.
The solution isn’t always a full-time hire. But it is always dedicated, expert-level ownership, someone whose entire professional focus is on making your tax function strong, strategic, and well-governed. That’s the kind of structure that lets your CFO do their best work, and lets your tax function do the same.
*Koru Accountancy Corp provides fractional VP/Director of Tax leadership to growing and complex organizations. We specialize in embedding executive-level tax expertise directly into finance teams, supporting companies through growth, transition, and complexity.
To learn more, visit koruaccountancy.com.*
