The job past the reporting line
The CFO role transcends financial reporting. It takes in strategic advice, challenging decisions and genuine business input, and if the CEO does not instinctively trust or enjoy working with the CFO, technical ability becomes largely irrelevant.[1] That last part surprises founders, but it is the part that decides whether the hire works.
In a startup the boundaries are looser than any job description suggests. The reality of startup finance roles is that the work is not neatly defined: people go from ordering stationery to financial modelling and board meetings, shifting between strategic and operational work constantly.[2] Hiring someone who expects a clean mandate is a mismatch you will feel in month three.
| Level | What the role actually owns | |
|---|---|---|
| Financial Controller | The integrity of the numbers | The close, compliance and reporting the board can rely on. Builds and runs the function. |
| Head of Finance | What you do with the numbers | The model, the reporting frameworks and the systems that support a raise. Proactive rather than responsive. |
| CFO | Strategy, capital and the board | Owns the financial strategy and the investor relationship, challenges decisions, and carries the function rather than just running it. |
The behavioural difference between a reporting hire and a strategic one is the same thing that separates the salary bands here.
What the first finance person really builds
Before the CFO conversation, most businesses need a first finance hire, and the framing matters. The first finance person is not a bookkeeper. They are the person who builds the foundational infrastructure your business grows on: reporting frameworks, compliance structures, and the systems that support fundraising, acquisition and scaling.[3]
That infrastructure is what a later CFO inherits. Get it right and the CFO arrives to a function they can lead. Get it wrong and their first year is a rebuild, which is expensive at CFO rates.
I set out how the finance function splits as headcount grows, and which role to add in what order here.
Why the requirements change as you scale
The same person is not right forever. A finance professional who is excellent pre-revenue and at building foundations will usually lead the function well through to Series A, but the requirements become very different after that.[4] Recognising that is not a criticism of the person; it is the normal shape of the role.
Sector context changes the brief too. For a deep tech CFO the transferable skills are managing capital-intensive environments, long lead times, demanding technical stakeholders, and building reporting under uncertainty.[5] Those transfer from manufacturing, defence or mining more readily than a matching industry label would suggest.
The part AI has not taken
CFO and first-finance-hire roles are comparatively AI-resistant, because they require investor communication, building financial infrastructure across the business, and operating with judgement under ambiguity, unlike more junior finance work.[6] The tooling has genuinely absorbed a lot of production work. It has not absorbed the decisions.
Where AI has moved the line is lower down. What was a virtual CFO workload three years ago is increasingly something a financially capable founder can do with AI in the loop.[7] But AI tools remain poor at challenging the assumptions behind them, and the real value of a senior finance person is the pushback, not the spreadsheet.[8]
I went deeper on the strategic planning half of the CFO role, including what AI now does and does not do here.
Common questions
What does a CFO actually do?
A CFO is the most senior finance person in a business, reporting to the CEO, and owns financial strategy, capital planning, governance and the investor relationship. The role transcends financial reporting: it takes in strategic advice, challenging decisions and genuine business input. In a startup the boundaries are looser than any job description suggests, with people moving between operational and strategic work constantly.
What is the difference between a CFO and a financial controller?
A controller owns the integrity of the numbers: the close, compliance and reporting you can rely on. A head of finance owns what the business does with those numbers, the model and the frameworks. A CFO owns the financial strategy, the capital plan and the investor relationship, and carries the function rather than just running it. Most businesses need the first two before the CFO role has enough real work in it.
Is the first finance hire just a bookkeeper?
No, and the distinction matters. The first finance person builds the foundational infrastructure your business grows on: reporting frameworks, compliance structures, and the systems that support fundraising, acquisition and scaling. Transactional bookkeeping is usually outsourced underneath them. Get that infrastructure right and a later CFO inherits a function they can lead rather than a rebuild.
Will AI replace the CFO role?
Unlikely at that level. CFO and first-finance-hire roles are comparatively AI-resistant because they require investor communication, building financial infrastructure across the business, and operating with judgement under ambiguity. AI has moved the line lower down: what was a virtual CFO workload three years ago is often something a financially capable founder can now do with AI in the loop. But AI is still poor at challenging the assumptions behind its own output.
Does a CFO need experience in my industry?
Less than founders assume. Requirements change with stage more than with sector: someone excellent pre-revenue and at building foundations usually leads well through to Series A, after which the requirements shift. For deep tech, the transferable skills are managing capital-intensive environments, long lead times, demanding technical stakeholders and reporting under uncertainty, which transfer from manufacturing, defence or mining.
References
- Tom Hunter on the CFO mandate: the role transcends financial reporting, encompassing strategic advice, challenging decisions and critical business input; if the CEO does not instinctively trust or enjoy working with the CFO, technical ability becomes irrelevant.
- Tom Hunter on startup finance roles: work is not neatly defined, with individuals going from ordering stationery to financial modelling and board meetings, shifting between strategic and operational work.
- Tom Hunter: the first finance person is not a bookkeeper; they build the foundational infrastructure the business grows on, including reporting frameworks, compliance structures and systems for fundraising, acquisition and scaling.
- Tom Hunter: a finance professional who excels pre-revenue and at building foundations will likely lead the function through to Series A, but requirements become very different beyond that stage.
- Tom Hunter on deep tech CFO requirements: key transferable skills include managing capital-intensive environments, long lead times, demanding technical stakeholders and building reporting under uncertainty.
- Tom Hunter: CFO and first finance hire roles are AI-resistant because they require investor communication, building financial infrastructure across the business, and operating with judgment and ambiguity, unlike more junior finance roles.
- Tom Hunter on AI and the finance function: what was a vCFO-level workload three years ago is increasingly something a financially capable founder can do themselves with AI in the loop.
- Tom Hunter: AI tools are still poor at challenging the assumptions behind them; the vCFO's real value at this stage is in the pushback, not the spreadsheet.