The finance function inside a venture-stage company has four tiers. Knowing which tier a person operates at is the difference between hiring useful help and paying for the wrong work.
The four tiers.
Tier 1: Bookkeeper.
Records transactions. Reconciles bank accounts. Categorizes expenses. Produces compliant books. Cost: $300 to $800 per month for a venture-stage company.
Tier 2: Controller.
Owns the monthly close. Reviews financials for accuracy. Manages AP and AR. Produces variance reports. Cost: $80K to $150K per year full-time, or $2K to $4K per month part-time.
Tier 3: Director of Finance.
Builds financial models. Owns budgeting and forecasting. Manages headcount planning. Runs analytics. Cost: $150K to $220K per year full-time, rarely fractional.
Tier 4: CFO.
Owns capital strategy. Negotiates with investors. Architects the cap table. Designs the operating cadence. Holds the seat at the board table. Cost: $250K to $450K full-time, or $3K to $12K per month fractional.
What gets confused.
Founders often hire a Tier 2 controller and call them a fractional CFO because the controller has more finance vocabulary than the founder. The work that gets done is real, but it is Tier 2 work, not Tier 4 work. The strategic gap stays open.
The reverse also happens. Founders hire a Tier 4 fractional CFO and ask them to reconcile QuickBooks. The CFO does it, because they want to be useful, but it is the wrong allocation of a scarce resource. The founder is paying $400 an hour for $40-an-hour work.
The actual work of a fractional CFO.
Here is what Tier 4 looks like, line by line.
Capital strategy.
- Decide when to raise based on milestones and market conditions
- Choose between SAFE, convertible note, or priced round
- Set the target raise amount based on what it unlocks, not what is needed
- Build the investor narrative and the financial spine that supports it
Investor relationships.
- Map target investors by thesis, stage, and structure fit
- Manage the diligence process, including data room and reference calls
- Run point on term sheet negotiation
- Communicate with existing investors on cadence
Cap table architecture.
- Model conversion math across multiple rounds out
- Manage option pool sizing and refresh timing
- Design advisor and key-hire equity structures
- Hold the line on dilution discipline
Financial architecture.
- Own the 24-month three-statement model
- Run scenario planning around capital and operating decisions
- Set the metrics that drive board-level visibility
- Tie unit economics to the operating plan
Operating cadence.
- Set the monthly close and reporting rhythm
- Build the board pack and run the prep cadence
- Sequence hiring against capital deployment
- Hold cost discipline as the company scales
What it is not.
A fractional CFO does not:
- Reconcile bank accounts
- Cut checks or process payroll
- Prepare tax returns or audit support
- Solicit investors as a broker
- Replace a controller or bookkeeper
If the work you need is in that list, you are hiring at the wrong tier.
What a fractional CFO costs.
Founders compare the monthly retainer to a salary and stop there. Compare the full cost instead.
A full-time CFO at a seed or Series A company runs $170K to $240K in base salary in 2026. Add roughly 30% for benefits and payroll taxes and the loaded cost is $220K to $310K a year, before equity. Equity for a CFO at this stage is typically 0.5% to 1.5%, and a retained search adds $30K to $80K on top.
A fractional CFO bills one of two ways. Senior operators charge $250 to $400 an hour. Retainers run $3K to $12K a month depending on scope, which is $36K to $144K a year. My own minimum is a 20-hour month, which lands at about 20 to 25% of a full-time CFO's loaded cost.
The honest comparison is not fractional against full-time. It is fractional against nobody. One worked example: a company raising $4M at a $16M pre-money, which is the 2025 Carta median seed, gives away two extra points of ownership because the SAFE stack was never modeled before the term sheet. Two points of a $20M post-money is $400K on paper today. At a Series A priced at $40M pre with $10M in, those same two points are worth $1M. Three years of a $5K monthly retainer is $180K.
Which tier you need: three questions.
Is the problem what happened, or what happens next?
If the books are late, uncategorized, or wrong, that is Tier 1 or Tier 2 work and it is cheap to fix. Hire a bookkeeper or a part-time controller. If the books are fine and the question is how long the cash lasts, what the next round should look like, or what the Series A math does to your ownership, that is Tier 4 work.
Has an investor asked for something you could not produce in a day?
A monthly three-statement model, a cap table with every SAFE converted, a data room index, a use-of-funds that ties to the model. If one of those requests sent you into a weekend of spreadsheet work, the gap is at the top of the stack, not the bottom.
Is there a raise inside the next twelve months?
If yes, the CFO work starts now, because the model needs a quarter to build and a quarter to pressure test before an investor sees it. If no, and the company is still looking for product-market fit, a CFO is the wrong hire and a good one will tell you so. I wrote up the signals in when to hire a fractional CFO.
How to test for it.
When you are interviewing a fractional CFO, ask them to walk through the cap table math at a hypothetical Series A. If they reach for the model, they are Tier 4. If they reach for QuickBooks, they are Tier 2 with a Tier 4 business card.
Then ask which institutional investors they have closed rounds with. If the answer is general ("I've worked with VCs"), they are an advisor. If the answer is specific (named funds, named partners, named outcomes), they are an operator.
The difference shows up in every conversation that follows.
What the first ninety days look like.
If you hire at Tier 4, this is roughly the shape of the first quarter, based on how my own engagements run.
- Days 1 to 10. Access to the bank, the ledger, the cap table, and the pipeline. I read everything before I change anything.
- Days 10 to 45. The financial model: three statements, monthly, with the drivers named. The cap table rebuilt from the signed documents, every SAFE and note converted at three different round prices.
- Days 30 to 60. The data room, indexed the way an investor runs diligence. By day 60 a founder can send an investor a link.
- Days 60 to 90. The operating cadence: a weekly numbers review, a monthly close, and a board pack that comes out on the same day every month.
Not sure which tier you are at? The Hiring Plan vs. Capital tool shows what each finance hire does to your runway, and the rest of the free tools cover the Tier 4 work itself.