CFO for Startups Ireland: When You Need One and What to Look For

The term sheet had been on the table for six weeks. The VC was not stalling. They were waiting. Waiting for a financial model that could hold up to scrutiny, for management accounts that closed on time, for a revenue forecast built from something more robust than assumptions layered on top of a spreadsheet. The founder had a good accountant. She had a sharp commercial instinct. What she did not have was a CFO. By the time she found one and got the data room in order, two of the three investors had moved on to other deals. She closed her Series A, but at a lower valuation and on weaker terms than she had been offered at the start.

That story is not unusual. I have seen a version of it more than once. The founders who walk into Series A conversations without a CFO are not underprepared in their core business. They are underprepared for the financial rigour that institutional capital demands. And by the time the term sheet arrives, it is too late to fix it quickly.

This post is a framework for Irish founders: the three signals that mean it is time for a CFO, what a startup CFO actually does that your accountant does not, how the fractional versus full-time question maps to revenue stage, and what the cost of waiting looks like in practice.

What a CFO Does That an Accountant Does Not

This is the objection I hear most often: “We have a good accountant. Do we really need a CFO on top of that?”

The answer depends on what you are asking the finance function to do.

An accountant keeps your books accurate. They file your returns, prepare your year-end accounts, handle payroll, and make sure you stay on the right side of Revenue. A good accountant is essential. They are not a CFO.

A CFO uses those numbers to drive decisions. They build the financial model that tells you whether your growth plan is fundable. They manage investor relations and prepare the board pack. They stress-test the business plan before you take it into a fundraise. They tell you which product line is actually generating margin and which one is eating it. They sit at the table when you are negotiating terms with a bank, a PE house, or an acquirer.

The distinction is between recording what happened and shaping what happens next. If the decisions in your business are getting bigger, more capital-intensive, or more visible to external stakeholders, the need for someone who can operate at that level grows quickly.

The Three Trigger Points

There is no universal rule for when a startup needs a CFO. But in practice, three situations come up repeatedly.

Trigger One: Approaching a Series A or Institutional Fundraise

The financial scrutiny at Series A is categorically different from the conversations you had at seed stage. Investors will want management accounts that close by day 5 to day 8 of the following month. They will want a three-year financial model built on defensible assumptions, with sensitivity analysis. They will want a data room that is organised, accurate, and complete. They will want to speak to someone who owns the numbers, not a founder who has to go away and check with their accountant.

If you are three to six months out from a raise and you do not have a CFO in place, that is the first trigger. Getting a CFO into the business after the term sheet arrives is too late.

Trigger Two: Revenue Above €3m With Structural Complexity

At €3m in revenue, a startup is usually no longer a simple single-entity operation. There may be multiple legal entities, revenue recognised across different product lines, international customers with different billing arrangements, or a finance team that has grown faster than the processes around it. The investor reporting requirements, if you have backers, are more demanding. The bank facilities are larger. The decisions carry more weight.

This is the stage where a capable management accountant runs out of road. The business needs someone who can interpret the numbers and translate them into a coherent financial narrative for the board.

Trigger Three: The Board Cannot Answer Its Own Financial Questions

This one is often overlooked because it feels softer. But it is a genuine signal. When your board is asking about EBITDA margin progression, covenant headroom, working capital requirements for the next growth phase, or what the financial model looks like under a downside scenario, and nobody in the finance function is equipped to answer credibly, you have a gap at the CFO level.

Board confidence in management is partly built on financial credibility. If the finance answers are vague, delayed, or clearly assembled by someone who is out of their depth, it affects how the board governs and how they feel about backing the next investment.

Fractional or Full-Time: The Stage-by-Stage View

The right structure depends on where the business is. Bringing in a full-time CFO before the business needs one is expensive and often ineffective: the role fills itself with work that a good finance manager could do, and the senior hire gets bored or leaves.

€0m to €3m Revenue

At this stage, a full-time CFO is almost never the right answer. The finance function at this scale does not generate enough complexity to justify a senior salary, and the founder typically needs judgment on specific questions rather than someone running a team.

A fractional CFO at one to two days per week can add real value here. Not to manage the books, which a bookkeeper or management accountant can do, but to build the financial model, help prepare for fundraising conversations, and give the founder a credible finance voice in investor meetings. The cost of a fractional engagement at this stage is typically €3,000 to €6,000 per month. That is not a trivial number for an early-stage business, but it is significantly less than an investor turning away because the numbers couldn’t hold up.

€3m to €10m Revenue

This is where most Irish startups will first feel the weight of not having proper CFO-level input. The complexity is real, the decisions are bigger, and the finance team (if it exists) needs leadership.

A fractional CFO at two to three days per week is often the right structure for the €3m to €7m range. Above €7m to €8m, the demands typically tip toward a three-to-four day engagement, or a full-time hire if the business has PE backing or is in an active fundraising cycle.

Full-time CFOs at this stage in Ireland typically cost €150,000 to €200,000 per annum in base salary. A fractional engagement at three days per week might run €8,000 to €12,000 per month. For a business that needs senior finance judgment but not a full-time presence, fractional is the more efficient use of capital.

€10m and Above

At €10m in revenue with institutional backing, the case for a full-time CFO is strong. The reporting requirements are more demanding, the complexity of the business warrants daily presence, and the cost of the hire is proportionate to the scale.

Even here, fractional works in specific contexts: a business that has recently lost a CFO and needs continuity, or a founder who wants an experienced CFO involved in a fundraise but does not yet need the full-time headcount cost. The point is that fractional is not a lesser version of the role. It is a different delivery model for a different set of circumstances.

For a fuller breakdown of how these models differ and when to use each, Fractional CFO Ireland vs Interim CFO works through the distinctions in detail.

The Cost of Not Having One

The clearest way to frame this is with numbers.

A delayed Series A round costs more than most founders realise. If a €3m raise takes six weeks longer than it should because the data room was not ready, the cost is not just six weeks of runway. It is the terms you accept under time pressure, the investors who moved on, and the management distraction of extending a process that should have closed. A fractional CFO engaged for three months ahead of a raise at €5,000 per month costs €15,000. The difference in valuation or terms on a €3m raise that closes cleanly versus one that drags is typically many multiples of that.

A working capital crisis that was preventable has a similar structure. I worked with a SaaS founder who had a profitable business on paper but had not modelled the cash requirements of his growth plan carefully enough. He was hiring ahead of revenue, his debtors days were stretching, and by Q3 he was negotiating a short-term facility at unattractive rates. A CFO with a monthly cash flow model and a forward view would have flagged this six months earlier. Instead, the problem became a crisis that consumed the founder’s time and damaged his relationship with his bank.

Neither of these situations required a full-time CFO hire to prevent. They required CFO-level judgment applied at the right moment.

Do You Need a CFO Now? A Checklist

• Are you within 12 months of a Series A or institutional fundraise?
• Is your revenue above €3m with more than one entity, revenue stream, or investor relationship?
• Are you unable to answer your board’s financial questions clearly and quickly?
• Is your management accounts close taking longer than day 10 of the following month?
• Do you have a three-year financial model you would be confident presenting to a sophisticated investor?
• Is nobody in your finance function thinking about working capital requirements for the next 12 months?
• Have you taken on bank debt without a clear view of covenant headroom?
• Are you spending more than a few hours per week on finance tasks that feel above your skill level?

If you answered yes to two or more, you have a gap at the CFO level. The question is not whether you need input; it is whether fractional engagement at your current stage is the right way to provide it.

If your business is preparing for a fundraise and you want to understand whether your finance function is ready, is your finance function investment-ready covers the specific gaps investors look for and how to close them before the process starts. For the earlier stage question of when to bring in any senior finance hire, when to hire your first finance director works through that decision in detail.

The Right Scope for the Right Stage

Getting CFO-level input into an Irish startup does not mean a full-time hire at the first sign of complexity. It means matching the engagement model to the actual needs of the business at its current stage.

I work with Irish founders and scaling businesses across Ireland and the UK. My fractional CFO work is typically with businesses between €1m and €15m in revenue that are preparing for a fundraise, managing the financial complexity of scaling, or building the finance function their next stage of growth demands.

If you want a direct conversation about where your business sits and what the right engagement looks like, the Work With Me page is the place to start.