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Born of Necessity: How We Run Our Own Finance Practice

CFO
Published
4 min read

Every startup needs a finance team. Almost none of them have one, so founders improvise. Not because they are careless, but because a real finance function costs more than an early company has, and the improvising starts exactly when the decisions start getting expensive.

We wanted to bet on founders at that stage. That left two options: discount the same work and hope volume covers it, or change how efficiently the work runs. Discounting only moves the problem, because every client still takes the same effort to learn. So we did the second thing, and this is the walkthrough of what it took.

Nothing in it is a roadmap or a pilot. The month described is the one our team actually runs.

What the video covers

The full walkthrough is above, and there is also a slide version. If you would rather read, the rest of this page is the short version.

Chapters: the constraint and why finance gets assembled in pieces (0:00), one shared context instead of three disconnected teams (2:17), what we built and what we refuse to do with AI (3:41), how the team and the month are arranged (9:26), numbers that look forward rather than back (12:18), and why the proof is the practice (16:46).

The cost of the seams

A finance function is four separate jobs, and no early company can staff all four. So it arrives in pieces: a founder and a spreadsheet, then a bookkeeper, then a CPA at tax time, then a fractional CFO before the raise. Each one shows up in response to something that already went wrong.

Doing it yourself is rarely wrong in a way you notice at the time. It is wrong in two quieter ways. The first is money left on the table: tax overpaid because nobody structured it, an election missed because nobody watched the date, a credit never claimed because nobody knew to look. None of that shows up as an error. It shows up as nothing at all.

The second is mistakes found late. A misclassification sits harmlessly for two years, then surfaces in diligence, where fixing it costs a multiple of getting it right and the finding itself becomes a negotiating point.

There is a third cost almost nobody names. The founder ends up explaining their own company three separate times, then carrying the job of keeping all three teams consistent with each other. Nobody offered them that job.

One shared context

The problem is not the people, it is the shape. Three teams doing four jobs on the same company, none able to see the others' work, connected only by a spreadsheet the founder maintains.

Replace that connector with one shared context per client, per month, that every discipline writes to and reads from. Bookkeeping writes it. Accounting closes it. Tax reads it. The CFO explains it. Everything else follows from that one move. It is the simplest idea here and the hardest to actually do.

We built ClariFi for this, not to sell it. We would have been happy to buy it instead, but nothing on the market put the four disciplines on the same context.

The four things we will not do

This is the part I would want a founder to hold us to. A language model predicts the most likely next token, and it is exactly as confident when it is wrong as when it is right, so a hallucinated number is indistinguishable from a real one at the point where you read it. In most software that is survivable. In a filing it is not.

Ninety-nine percent right is a good score for a model. Ninety-nine percent right is a restatement for a ledger.

So: we do not let AI produce a number, we do not let a draft go out unread, we do not publish a figure with no source behind it, and we do not offer speed we could not defend to a client. Tested code does the arithmetic. AI drafts the explanation. Every automated output lands as a draft carrying its source, and nothing reaches a client without sign-off from a qualified accountant, a CPA, or a CFO.

That last rule is enforced in the code rather than in a policy someone has to remember. The advisors are read-only by construction, verified by a test in our build pipeline that fails the release if any of them could write to a client's books.

Slow where it matters

The operating rule that falls out of all this: slow where it matters, which is judgment, tax positions, and anything a client is going to act on. Fast where it does not, which is reconciling, categorizing, chasing documents, and formatting.

Nobody's relationship with their accountant was ever built on how quickly a bank statement got categorized.

The seat no software fills

The outcome founders feel fastest is hours coming back. The one that matters longest is different. Who else is in the room when a hard decision is on the table?

Not a co-founder, who has their own stake in every answer, so the conversation is already a negotiation. Not an employee, who reports to the person asking, so the honest answer has a cost. Not an investor, who sits on the other side of the table, so caution creeps into everything shared. None of that is about character. It is what the seat does to the conversation.

What is left is someone qualified, outside the company, bound to confidentiality, with no position in the outcome. That seat is the part of this no software provides, and it is why the whole argument keeps coming back to experts. Most founders have nobody in it.

Born of necessity. Kept because it works.

Frequently asked questions

Why do most startups not have a finance team?

A finance function is four separate jobs: bookkeeping, accounting, tax, and strategic finance. No early-stage company can staff all four, so it gets assembled in pieces over time, usually in response to something that has already gone wrong. The cost is not visible as an error. It shows up as tax overpaid because nobody structured it, an election missed because nobody watched the date, and misclassifications that surface years later in diligence, where fixing them costs a multiple of getting them right.

Can AI be trusted to produce financial statements?

Not to produce the numbers. A language model predicts the most likely next token and is exactly as confident when it is wrong as when it is right, so a hallucinated figure is indistinguishable from a real one at the point you read it. Ninety-nine percent right is a good score for a model and a restatement for a ledger. The workable division is that tested, deterministic code does the arithmetic while AI drafts the explanation, and a qualified accountant, CPA, or CFO signs off before anything reaches a client.

What does read-only by construction mean?

It means the advisors cannot write to a client's books, and that this is enforced by a test in the build pipeline rather than by a policy someone has to remember. If any advisor could reach a write path, the release fails. Books stay in QuickBooks, Xero, or Zoho, and a bookkeeper makes every entry.

Why does a founder need an outside financial perspective?

Because everyone inside the company has a stake in the answer. A co-founder has their own position, so the conversation is a negotiation. An employee reports to the person asking, so honesty has a cost. An investor sits across the table, so caution creeps into what gets shared. None of that is about character; it is what the seat does to the conversation. What is left is someone qualified, outside the company, bound to confidentiality, with no position in the outcome.

About the author

Harry Prabandham

Founder & CEO

Founder and CEO of StartupCFO. MBA from Wharton, MS in Computer Science, and decades of experience building and advising venture-backed startups.

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