Six situations account for nearly every engagement. If two or more of these describe you, the question is not whether to get help but how quickly.
Model Built for the RaiseYour model was built to raise, not to run
It produced a number for the deck and has not been opened since.
It produced a number for the deck and has not been opened since. A model that cannot reproduce last quarter is not a forecast, it is decoration — and when the board asks what happens if churn doubles, a driver-based model answers in one cell.
Bookkeeper + Accountant HiredYou have a bookkeeper and an accountant
Neither tells you what to charge, which customers lose you money, or whether the next hire is affordable.
Bookkeeping records what happened. Tax compliance files it. Neither tells you what to charge, which customers lose you money, or whether the next hire is affordable. That is a third function entirely, and most companies discover the gap at the worst possible moment.
Collections Define RunwayYour runway number assumes everyone pays on time
Runway moves when collections slip — a 30-day customer becoming a 60-day customer can change the answer.
Most runway calculations divide cash by average burn. That is a number about spending, not about survival. Runway is a collections question: it moves when a large customer goes from thirty days to sixty, and founders get caught when they never model the gap.
The Unprepared QuestionsThe question you have not prepared for is not about growth
Investors ask why gross margin moved four hundred basis points in Q3, and whether the cause is mix or pricing.
Investors and buyers spend little time on your revenue forecast. They ask why gross margin moved four hundred basis points in Q3, and whether the cause is mix, pricing or an error. That question is either answered in advance or improvised in the room.
Twenty slides pulled from three systems, and the meeting still starts by debating the numbers.
Twenty slides assembled the night before from three systems, and the meeting is still spent arguing about whether the numbers are right instead of what to do about them. That is an architecture problem, not an effort problem, and no amount of working later fixes it.
Term Sheet Not ModeledYou will negotiate a term sheet you have not modeled
Liquidation preference, participation, option pools, and SAFE conversion determine what you actually keep in the outcomes that matter most.
Liquidation preference, participation, option pool top-up, conversion on the last SAFE. These decide what you keep in the outcomes you are most likely to get — and they are agreed in a week, by a founder seeing the structure once and an investor who has seen it 200 times.
When to hire a fractional CFO
The honest answer is not "as early as possible." It is when the cost of a wrong financial decision exceeds the cost of the engagement.
You are a startup approaching or running a raise
The most common trigger. A fractional CFO for startups earns their fee twice when the financial model is intact.The most common trigger. A fractional CFO for startups earns their fee twice over if they prevent one avoidable term-sheet concession — and the financial model is where those concessions usually originate.
You have crossed roughly $1m–$2m of revenue
Below that, a competent founder with a good bookkeeper can usually hold it together. Above it, the number of interacting decisions — pricing, hiring, working capital, credit terms.Below that, a competent founder with a good bookkeeper can usually hold it together. Above it, the number of interacting decisions — pricing, hiring, working capital, credit terms — exceeds what anyone can carry alongside running the company.
You have taken on debt, or are about to
Lenders underwrite cash flow rather than growth, and covenant compliance is a monthly discipline rather than an annual.Lenders underwrite cash flow rather than growth, and covenant compliance is a monthly discipline rather than an annual one. A breach you did not see coming is materially worse than one you negotiated in advance.
Your board has started asking for things you cannot produce
Cohort economics, contribution margin by segment, a real downside case. If the ask has moved beyond a P&L, the reporting function needs to move with it.
How the engagementworks
No open-ended retainers that drift. Every engagement starts with the same diagnostic and then narrows to what you actually need.
1
Weeks 1–2
Diagnostic
A full read of what exists: historical accounts, any current model, the reporting pack, the cash position and the commitments against it.A full read of what exists: historical accounts, any current model, the reporting pack, the cash position and the commitments against it. The output is a written assessment of what is sound, what is broken, and what it will cost to fix — with a recommendation to proceed or not.
2
Weeks 2–6
Foundations
Whatever the diagnostic identified as load-bearing. Usually a rebuilt three-statement model on real drivers, a 13-week cash flow forecast, and a reporting pack.Whatever the diagnostic identified as load-bearing. Usually a rebuilt three-statement model on real drivers, a 13-week cash flow forecast, and a reporting pack that assembles in an hour rather than a week.
3
Ongoing
Operating Rhythm
A monthly cycle: close review, variance against plan with the drivers explained, forecast update, and the two or three decisions that need a view this month.A monthly cycle: close review, variance against plan with the drivers explained, forecast update, and the two or three decisions that need a view this month. Plus availability between cycles, because the questions that matter rarely wait for the monthly meeting.
4
Event-driven
Investor / Lender ReadinessRaise, Debt or Transaction Readiness
Diligence-ready financials, valuation work, scenario and sensitivity analysis, and preparing you for the questions before they are asked — so that you can answer them yourself with the numbers behind you.Diligence-ready financials, valuation work, scenario and sensitivity analysis, and preparing you for the questions before they are asked — so that you can answer them yourself with the numbers behind you. This is where the private-markets background does the most work.
Most founders arrive at a raise with a model built to produce a number for the deck, historical accounts nobody has stress-tested, and no idea which three questions will actually be asked. The round then gets run on the investor's terms, against the investor's model.
What it covers:
A rebuilt three-statement model
on real drivers, reproducing your historicals before it forecasts anything
A defensible valuation range
with the method stated and the sensitivities shown
Cap table and dilution modeling
across the outcomes you might actually be offered
Data-room financial content
, structured and indexed the way diligence expects to find it
A use-of-funds and milestone plan
tied to the model rather than written alongside it
A diligence question bank
— the questions you will be asked, with your answers prepared and the numbers behind each one
A mock diligence session
, so the first time you answer them is not in front of an investor
What it does not cover, deliberately.
ControlFi does not introduce investors, contact or pitch them, or negotiate terms on your behalf, and takes no fee contingent on a round closing.
What you get
Concrete deliverables, not advisory hours - models, forecasts, dashboards, and decision tools your team can actually use.
3-Statement ModelThree-Statement Financial Model
Built on drivers, reproducing your historicals before it forecasts anything, with a balance check.
13-Week Cash Flow13-Week Cash Flow Forecast
Updated weekly, showing the specific week cash gets tight under each scenario.
Monthly Board Pack
P&L, cash, KPIs, variance against plan with drivers explained, and a forward view.
Scenario AnalysisScenario + Sensitivity Analysis
Base, upside, and downside scenarios that move the underlying drivers—collections, churn, and conversion.
Unit Economics Analysis
Contribution margin by segment, payback, and the cohort view underneath them.
Transaction ReadinessRaise and Lender Readiness
Diligence-ready financials, valuation support, data-room financial content, and the question list you will be asked.
What a fractional CFO costs
Pricing is often opaque because three common engagement structures are compared as if they were equivalent.
Monthly Retainer
Ongoing finance leadership. Fixed monthly fee, defined scope.
Project Fee
Fixed price for a model, reporting rebuild, or raise-readiness package.
Day Rate
Best for diagnostics and focused, time-bound engagements.
Fractional CFO vs the alternatives
Four ways to get finance leadership. They fail in different places.
Comparison of finance leadership options
Option
Cost
What you get
Where it breaks
Do it yourself
Your time
Full context, zero cost
The founder-hours are the scarcest resource you have, and you find your errors when an investor does
Accountant
Low
Accurate records, filed on time
Records the past. Does not forecast, price, or model a decision
Full-time CFO
High
Daily presence, builds and runs a team
Salary plus equity before you have the scale to justify it. Hard to reverse if the fit is wrong
Fractional CFO
Mid
Senior judgement on the decisions that matter, investor-grade financials
Not full-time. Not the right answer if you need daily presence or a finance team managed
1. Do it yourself
Cost
Your time
What you get
Full context, zero cost
Where it breaks
The founder-hours are the scarcest resource you have, and you find your errors when an investor does
2. Accountant
Cost
Low
What you get
Accurate records, filed on time
Where it breaks
Records the past. Does not forecast, price, or model a decision
3. Full-time CFO
Cost
High
What you get
Daily presence, builds and runs a team
Where it breaks
Salary plus equity before you have the scale to justify it. Hard to reverse if the fit is wrong
4. Fractional CFO
Cost
Mid
What you get
Senior judgement on the decisions that matter, investor-grade financials
Where it breaks
Not full-time. Not the right answer if you need finance team managed.
Why ControlFi
9+ years in corporate finance9+ years in M&A, investing and private markets
30+ cross-border M&A transactions and financings with $700M+ in total aggregate value.Sell-side advisory on 30+ cross-border transactions and private financings worth $700M+, buy-side investing across a $500M+ private markets portfolio, and in-house finance leadership — spanning EMEA, North America and APAC.
You work with the operatorYou work with the person who does the work
You work directly with the person doing the work. No junior handoff.No associate builds your model. No handover.
No commitmentNo commitment. You'll leave knowing what your financial system needs
The diagnostic is designed to tell you whether you need this, including when the answer is no.The diagnostic is designed to tell you whether you need this, including when the answer is no.
Clear boundaries on fundraisingClear boundaries on fundraising
ControlFi prepares you to raise — the model, the financials, and the answers to what diligence will ask.ControlFi prepares you to raise — the model, the financials, and the answers to what diligence will ask. We do not introduce investors, solicit them, or negotiate terms on your behalf, and it takes no fee contingent on a round closing.
ControlFi Library
More on how ControlFithinks about thisMore on how ControlFi thinks about this
Practical guides to hiring finance leadership, building reliable models, and understanding the numbers behind your business.
A senior finance leader who works with your company part-time, on a retained or project basis, rather than as a full-time employee. You get CFO-level judgement on strategy, forecasting, capital and reporting, at a fraction of the cost and commitment of the hire. For a fuller explanation, see what a fractional CFO does.
What do fractional CFO services include?
Typically: financial modeling and forecasting, cash flow management, board and management reporting, unit economics, budgeting and variance analysis, and support through raises, debt facilities or transactions.
How much does a fractional CFO cost?
Most engagements are priced as a monthly retainer against a defined scope, with project fees for one-off deliverables. Cost is driven by company complexity, stage, the state of your historical accounts, and whether a financing event is live. See the pricing section above for ControlFi's structure.
When should I hire a fractional CFO?
When the cost of a wrong financial decision exceeds the cost of the engagement — commonly at $1m–$2m of revenue, eight to twelve weeks before a raise, when debt enters the picture, or when the board starts asking for analysis you cannot produce.
What is the difference between a fractional CFO and a controller?
A controller owns the accounting function — close, controls, accuracy. A fractional CFO uses those outputs to make forward decisions on pricing, capital and allocation. If your numbers are late or wrong, hire the controller first.
How is a fractional CFO different from an outsourced CFO?
Largely positioning. "Fractional" usually describes a part-time senior individual embedded with a startup or scale-up; "outsourced" usually describes a firm taking on the finance function for an established business. ControlFi offers both — see outsourced CFO services if you are an established company looking to hand over the function rather than add a part-time leader.
Do I still need a bookkeeper or accountant?
Yes. A fractional CFO does not replace bookkeeping or tax compliance and should not be doing either. They sit above both and depend on both being reliable.
How many hours a month is it?
Less relevant than it sounds. The work is scoped by deliverable and rhythm rather than logged hours — a model that takes forty hours and prevents a bad pricing decision is not better value at eighty.
Can a fractional CFO help me raise?
That is one of the most common reasons to engage one, with one boundary worth stating plainly. The work is preparation: investor-grade financials, valuation work, scenario analysis and diligence readiness, informed by having seen these questions from the investor side. ControlFi does not introduce investors, solicit them, or negotiate terms on your behalf, and takes no fee contingent on a round closing. Engage before the round opens, not during it.
How do I choose a fractional CFO?
Ask to see a model they built. Ask what they would check first in yours. Ask what proportion of engagements they turn down and why. Anyone who cannot answer the third question is selling hours rather than judgement.
What happens in the first two weeks?
A diagnostic: a full read of your accounts, model, reporting and cash position, and a written assessment of what is sound, what is broken, and what it costs to fix. Including, where it applies, a recommendation not to proceed.
Talk to a fractional CFO
A 30-minute review to understand where you are, what is missing, and what should be next.A 30-minute review to understand where you are, what is missing, and what should happen next.