Startup Fractional CFO: 4 Situations and Who Fits Each

Startup Fractional CFO: 4 Situations and Who Fits Each

A startup fractional CFO is a part-time finance leader who works a set number of hours or a fixed monthly fee, so a young company gets CFO-level thinking without a full-time salary. The idea is simple. The hard part is that the right fit depends on where the company is, and some stages are too early or too late for any fractional engagement.

This post sorts four situations, from the earliest to the most mature. Two of them match one of the firms below. Two do not, and it says so. The situations are a progression, not a ranking, and the firms are not ranked.

Two firms in the Sam's List partner program are written up here. Iota Finance, a Florida firm offering monthly accounting, tax and fractional CFO services for small businesses and startups, is one. System Six, a Seattle bookkeeping and fractional CFO firm, is the other. Every firm named is a vetted Sam's List member. The firms written up here are paying members of our featured program, and payment does not buy the language we use or its reviews. How we chose is at the end.

Situation 1: A Startup Fractional CFO Is Usually Too Early Before Revenue

A founder with a prototype, a few customers or none, and a bank account that holds personal savings does not usually need a startup fractional CFO yet. What they need is clean books from day one, a separate business bank account, and a simple budget.

At this stage, the finance work is bookkeeping, plus perhaps a one-time conversation with a CPA about entity choice and tax. Most fractional CFO firms set minimums for revenue or funding, and a company this early often falls below them.

Iota Finance lists minimums of $500,000 in revenue and $500,000 raised, and System Six a $1 million revenue minimum. A company below them should ask a firm whether it takes smaller engagements instead of assuming it will.

The limitation: starting without a CFO is fine only if the books are clean. Rebuilding messy records later costs more than keeping them right now.

Situation 2: Funded and Ready for a Startup Fractional CFO

A company that has raised money has new needs: monthly books that reconcile, a cash forecast, a view of runway and reports an investor can read. This is the stage most people mean by a fractional CFO for seed stage companies.

Iota Finance may fit this situation if it clears the firm's minimums. It is based in Florida, founded in 2022, with seven employees, serving clients nationwide. Igor Tutelman, CPA, is the Managing Partner. Its live profile describes monthly accounting, tax and fractional CFO services for small businesses, startups and entrepreneurs, and lists Cryptocurrency Investors, Digital Nomads and Equity Compensation as specialties.

Iota Finance has 14 verified client reviews on Sam's List. Each review is submitted by an individual who identifies as a client of the firm and rates it on communication, subject-matter knowledge, and overall satisfaction. Reviews reflect those individual experiences and do not represent an endorsement by Sam's List. Iota Finance is a paying member of our featured program, and payment does not buy its reviews. Ratings and rankings are not indicative of future performance or results.

The limitation, plainly: the profile lists minimums of $200,000 in income, $500,000 in revenue and $500,000 raised, so a smaller round may fall outside them, and the profile does not say whether they are alternatives or all required, so confirm directly. It does not say how it builds investor reports, so ask for a sample.

Situation 3: Preparing Investor Reporting and a Fundraising Model

A company about to raise needs a financial model, a clean history and the ability to answer diligence questions about its numbers. This is where investor reporting stops being a favor to board members and becomes a requirement.

A fractional CFO can build the model, check that last year's books match what the model assumes and prepare the data room. The same person often stays on for board reporting after the raise.

Ask any candidate what the model will contain and who will own it afterward. A model built by an outsider and not understood by the founder is hard to update when assumptions change.

This situation can sit with either of two kinds of firm: one that does accounting and CFO work together, and one that does CFO work alone. Neither firm written up here lists fundraising model building as a service on its live profile, so ask directly whether it does that work.

The limitation: a model reflects assumptions, and investors will question them. A polished model does not make a weak assumption stronger.

Situation 4: A Company Modernizing Its Finance Function After an Acquisition

A business that has just been acquired, or that has just acquired another, often finds that its finance function no longer fits. Systems differ, books are on different bases and reports do not answer the owner's questions. This is a fractional CFO after an acquisition situation, and it is not limited to startups, although many acquired small businesses started recently.

System Six may fit this situation. It is based in Seattle, founded in 2009, with about 41 employees, serving clients nationwide. Its live profile says the firm was acquired by a searcher in 2021 and helps organizations modernizing a finance function after an acquisition. It lists Non-Profit Organizations, Professional Service Firms and Real Estate Investors as specialties, and serves small businesses generating between $1 million and $10 million of revenue.

System Six is early in building a review history on Sam's List, so we do not cite a review count and describe the firm by what its profile says instead.

The limitation, plainly: System Six's profile lists a $1 million revenue minimum, so an earlier-stage startup may fall outside what it takes on. It does not list startups as a specialty, so ask whether it works with venture-funded companies.

How to Choose Between a Fractional CFO and Other Options

A fractional CFO is one of several finance roles, and it helps to know where it fits. A bookkeeper keeps the records. A controller owns the close and the accuracy of the books. A fractional CFO looks forward, at cash, pricing, hiring and funding. A full-time CFO is worth considering once the finance work needs daily attention.

For a startup, the usual sequence is bookkeeping first, then a fractional CFO as the company funds or grows, then a full-time hire when the work fills the week. Skipping a step usually costs more than it saves.

Whatever you choose, write down what you expect in the first 90 days. A fractional CFO engagement without a defined first deliverable tends to drift.

The limitation: part-time means part-time. A fractional CFO is not on call every day, so urgent decisions need a plan for who covers them.

Frequently Asked Questions

What does a startup fractional CFO do?

A startup fractional CFO provides part-time CFO-level work, such as cash forecasting, budgeting, investor reporting, fundraising models and oversight of the books. Scope and hours are set by agreement, usually for a fixed monthly fee or a set number of hours.

When should a startup hire a fractional CFO?

Common triggers are a funding round, a need for regular investor reports, a cash forecast that no one can build or a decision on hiring or pricing that depends on better numbers. Very early companies often need bookkeeping first.

How is a fractional CFO different from a bookkeeper?

A bookkeeper records and reconciles transactions. A fractional CFO uses that data to plan, such as forecasting cash and preparing investor reports. Most startups need the records to be right before the planning is useful.

Do fractional CFOs have minimum company sizes?

Many do. Firms often set minimums for revenue, funding or monthly fees. The two firms in this post list minimums on their profiles, so check them and ask a firm directly whether it takes smaller engagements.

Before you talk to any firm, write down the three decisions you most want better numbers for. You can browse fractional CFOs on Sam's List, including the firms above, and ask each one which of these four situations it handles.

How We Chose These Firms

You should be able to check our work, so here is how this post was built.

The pool. The firms here are vetted Sam's List members in our featured program with live public profiles that describe fractional CFO services. This is not a survey of every fractional CFO that works with startups, and many Sam's List members not written up here could fit.

How it is organized. The four situations run from the earliest stage to a more mature one. They are a progression, not a ranking. Each firm is matched to the situation its profile most closely describes, and the firms are not ranked. Two of the four situations match neither firm, and the post says so.

What review counts mean here. We cite Iota Finance's verified review count and its date from its profile. System Six has too few reviews on Sam's List for a count to mean much, so we do not cite one. A count shows how many clients wrote something down, not technical quality.

What payment does and does not buy. Listing on Sam's List is free, and so is being named in this article. The firms written up here are paying members of our featured program, which is why they get a write-up. What payment does not buy is the language we use about a firm, its review count, or a promise that it fits you.

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About the author: Kimberly Green is the cofounder of Sam's List, where business owners and high earners find vetted CPAs, financial advisors, and fractional CFOs. She's met one-on-one with 400+ financial professionals and writes from the real data behind thousands of client-advisor matches. Ask her anything about finding an accountant - she's heard it all, including the questions people are afraid to ask.