How to hire a fractional CFO

A talented C-suite can help shape a startup’s future — and can also be a significant investment. Hiring a CMO, CTO, COO, or CFO with a proven track record will often command significant compensation. And while their guidance has the potential to change your company’s trajectory, the cost isn’t always tenable for a cash-strapped startup.

Fractional C-suite roles — that is, leaders with highly specialized skills working in a part-time capacity — have gained popularity in recent years. When a full-time hire doesn’t make sense for your budget or current expectations for the role, a fractional hire can give you access to someone who can guide a specific function within the organization at the right scale for right now.

Financial leadership, in particular, is critical for early-stage startups — and a fractional CFO can help navigate the tricky waters of cash flow management, raising capital, and financial planning.

A CFO is frequently not your first finance hire. From your business’s earliest days, you may have hired a bookkeeper to work with your accounting software, send invoices, and categorize expenses, or maybe an accountant (either internal or external) to provide additional expertise and tax advice.

But at some point, your financial needs will likely exceed what those professionals can provide. You’ll want someone who can strategically guide the organization’s finances — and that’s where a CFO comes in.

At a large company, a CFO often has a wide range of responsibilities, including budgeting, forecasting, analyzing financial strengths and weaknesses, ensuring compliance with regulations, developing internal controls, and reporting. A CFO is directly involved in major financial decisions the company makes. While a startup may need the same flavors of guidance, the scale can be smaller — as such, the role may be less complex and may not always require full-time attention.

Keep in mind, though, that a fractional CFO should generally provide more than high-level financial strategy — they should become immersed in the financial operations of your company. While you can hire a fractional CFO on a short-term or project basis, you can also hire someone to work long term. This can provide you with immersion and company-specific expertise similar to that of a  full-time CFO, with a leaner commitment aligned to your business’s current needs.

How finance roles differ at a startup

You might feel like you’ve outgrown a bookkeeper or an accountant when they can’t provide you with the financial support you need.

Here’s how different finance roles fit within an early-stage company, and why hire a fractional CFO in addition to other finance roles.

A fractional CFO uses all the data from a bookkeeper, accountant and controller to guide your company's financial future. If you don't have clean books, you have to start there — a fractional CFO's value depends on reliable financial data. 

Like any C-suite executive, your expectations for a fractional CFO should be high. Even though they may only work for you part-time, you’re still hiring someone with significant seniority and expertise to deliver results for your company.

Knowing specifically how a fractional CFO can help is a good starting point to guide your search and interview process. If you’re too broad with your expectations (“we need financial guidance”), you might struggle to establish the right goals with your fractional CFO. Instead, you should try to identify specific financial weaknesses or challenges in the company that you expect the fractional CFO to improve.

A typical fractional CFO can deliver any of the following, depending on your needs and their service offerings. 

You may need your fractional CFO to help with many financial aspects of the business — so it’s important to discuss what’s feasible within a fractional relationship and prioritize goals, if necessary.

Plus, outside of specific goals, one of the key benefits of a fractional CFO is that it may feel (or be) less risky than a full-time hire. The CFO role can be so critical to an organization that the wrong person can have a disastrous impact (or no impact at a time when you need guidance and impact the most). A fractional CFO not only supports your organization’s needs now, but can help you identify what you need the most from a future full-time hire.

As you craft a job description, you can emphasize the responsibilities that need more attention because the fractional CFO simply doesn’t have enough time, or because your organization’s needs have gotten more complex.

If your bookkeeper and accountant are keeping your company’s finances in order, when should you consider hiring a fractional CFO?

Accountants and CFOs typically have substantially different perspectives within the company. Accountants tend to focus more on what has already happened in the business. They’re responsible for financial reporting on existing transactions and managing the day-to-day operations. A CFO tends to focus on the future and drives planning and decision-making. Accountants are typically confined to the finance department, while a CFO collaborates across departments and interacts with the board.

You may not need a fractional CFO if your business model is relatively simple, your operation is small, and/or you’re comfortable with finance fundamentals. In some scenarios, even with a fractional role, the cost may not offset what a CFO can offer — if you mostly need more help with basic planning and budgeting, a skilled accountant may be able to satisfy your financial needs for now.

But if you’re struggling with cash flow, financial decisions, or pressures from your investors, you may need expertise beyond what an accountant can provide.

A fractional CFO can also be a good investment if you’re experiencing rapid growth, want to secure additional funding, or need strategic planning advice after funding has been obtained.

Decision checklist: Should you hire a fractional CFO?

If you answer “yes” to several of these, it's likely time to bring on a fractional CFO:

• Your cash runway is less than 12 months, and you don't have a clear plan to extend it
• You're planning to fundraise within the next 6 months and need help preparing the financial portion of your pitches to investors
• Your month-end close takes longer than 15 business days (or doesn't happen consistently)
• You've experienced recurring forecast variances above 20% and can't explain why
• Your headcount has grown, and you don't have formalized budgets for different departments or spend controls
• Board members or investors are asking financial questions you can't answer confidently
• You're evaluating a major financial decision (a pricing overhaul, new market entry, or acquisition) and need to create a financial model
• Your bookkeeper or accountant has flagged issues that they don't have the expertise to resolve
• You need to set up financial infrastructure (reporting, controls, governance) for the first time

Keep in mind that some of these are limited-scope engagements, like preparing to fundraise or evaluating a major financial system. A fractional CFO can help you build a financial model or prepare for due diligence, rather than provide ongoing services.

Finding the right fractional CFO is about finding the right fit. Referrals from other startups are a good place to start, but fractional CFOs bring different skillsets to the table. What worked for another company may not work for you.

You should approach the hire with specific search criteria and have a process to evaluate candidates.

Job description outline

When writing a job description (or a project scope to share with candidates), include:

• Company stage and size (your revenue, headcount, funding stage)
• Current members of your finance team (e.g., bookkeeper, accountant, controller)
• Your top 3-5 priorities for the role (e.g., financial modeling, board reporting, cash flow forecast)
• Expected time commitment (hours per week or days per month)
• Any decision-making authority (advisory only, or authority over specific financial decisions)
• Engagement type (ongoing retainer or project-based)
• Tools and systems your business uses (e.g., QuickBooks, Xero, Mercury)

Credentials and experience checklist

Use this checklist to screen candidates before the interview stage:

• CPA, CFA, or MBA with a finance concentration
• Has been a full-time CFO or VP of Finance at least once (not only a consultant)
• Experience working with startups at your stage (pre-seed/seed, Series A, Series B)
• Can provide references from multiple founder clients
• Demonstrates familiarity with your industry or business model
• Experience with fundraising processes (relevant to your next round)
• Comfortable working with your accounting software and existing financial tools
• Articulates how they scope engagements

Scenario-based interview questions

These questions are designed to reveal how a candidate thinks about real startup situations. You’ll want to tailor them to your business, but these are a baseline of the types of questions to ask.

1. We're running a monthly burn of $200K with 8 months of runway. Walk me through how you'd approach extending that runway without pausing growth entirely. 
2. Our Series A investors want a board reporting package, and we don’t have one currently. What would you include in the first version, and how would you keep it manageable for a small team? 
3. We're seeing a 25% variance between our quarterly forecast and actuals. How would you diagnose where the gap is coming from? 
4. Our bookkeeper just flagged that our revenue recognition may not be GAAP-compliant. How would you assess the situation, and what would your next steps be? 
5. We're considering raising a bridge round versus cutting expenses to extend our runway. How would you help us decide if that’s the right route?
6. We want to expand into a new market, but we're not sure if we can afford it. How would you evaluate the opportunity? 
7. We are considering restructuring our pricing, moving from monthly subscriptions to annual contracts. What financial implications would you flag before we make that change?
8. We're about to hire five engineers. How would you help us understand the true cost of those hires and when we'd see the ROI? 
9. Describe a time you identified a financial risk at a startup that the founders hadn't recognized. How did you surface it, how did you bring it up, and what happened? 
10. How do you handle a situation where your financial recommendations conflict with what your client wants to do?

Candidate scoring

Rate each candidate on a 1–5 scale across the following criteria: (1 being the lowest; 5 being the highest):

Note: A candidate who scores below a 3 in startup experience or strategic thinking is likely a better fit for a controller role than a fractional CFO engagement.

Red flags to watch for during the hiring process

• They can't name specific deliverables they'd produce in the first 30 days
• Their experience is primarily at larger companies or in traditional corporate finance
• They describe their work mostly in terms of bookkeeping or accounting tasks, instead of strategic thinking
• They can't provide references from other startups
• They resist scoping the engagement or the scope feels vague
• They don't ask you questions about your business during the interview

The candidate should also want to have an in-depth conversation about your current financials. If they ask to review the financials, have the candidate sign an NDA.

As you outline the scope of a project with your fractional CFO, you should discuss some baseline expectations around communication and deliverables.

Keep in mind that a fractional CFO is likely working with multiple clients. If they’re not focused solely on your company, you may not get an immediate response to questions, especially if the person only works with you a few hours per week.

In your agreement, you should outline the person’s regular (think: weekly) involvement with your company, whether it’s attending meetings, overseeing e.g., your accountant, or preparing/reviewing reports. You’ll also want to outline the larger initiatives you agree for them to focus on, such as optimizing spending or creating a budget. A fractional role may have a much shorter ramp-up period than a full-time role, so be sure to set your fractional hire up to dive in quickly.

Since C-suite roles are typically decision-makers, you’ll also want to clarify the person’s decision-making authority. Do any roles within the company report directly to the fractional CFO? Will they, for example, approve budgets for different departments, including increases in headcount? Do they have any unilateral decision-making power, or will you be the final rubber stamp? Will the fractional CFO serve mostly in an advisory role?

Your expectations for the role will drive the cost. You need to be crystal clear about expectations so you get your money’s worth. The range for a fractional CFO hourly rate or monthly retainer can vary widely, but it is often a fraction of what you would pay a full-time person. (Plus, you’re typically not paying benefits or offering equity to the fractional hire as they are not a full-time employee.)

Of course, what’s most pertinent to you will vary. While many fractional CFO roles are hired for ongoing engagements with recurring responsibilities, you may also hire for a specific project that has a clear, narrow scope and defined engagement period. (For example, you might want a fractional CFO to prepare for a financial audit or help you secure additional funding.) Either way, be clear on your ask!

Statement of Work Example

To start the engagement with a fractional CFO, you’ll want a statement of work (SOW) that clearly outlines the fractional CFO’s role, responsibilities, and deliverables. 

The fractional CFO may have one that they use with clients, or you’ll be expected to create one from scratch. Either way, the SOW should include:

Engagement structure:

• Time commitment: hours per week or days per month
• Engagement length: a retainer for 6-12 months or a specific project for 4-12 weeks
• Pricing: Monthly retainer or a project-based fee

What's in scope:

• Building or refining financial models
• Cash flow forecasting and runway planning
• Board reporting and investor communications
• Budget creation with variance tracking
• Fundraise preparation (including support for due diligence)
• Financial hiring plan (when to bring on a controller, accountant, or full-time CFO)

What's out of scope:

• Day-to-day bookkeeping and transaction categorization
• Tax preparation and filing
• Payroll administration
• AP/AR processing

(If you need any of these out-of-scope services, your fractional CFO can help you hire or evaluate the right people for those roles.)

Decision-making:

• Which decisions the fractional CFO can make independently (e.g., creating reporting templates or selecting a vendor)
• Which decisions require approval (e.g., budget or hiring within the finance department)
• Whether any team members report directly to the fractional CFO

Sample milestones for the SOW:

• Weeks 1-2: Financial review and assess existing tools and processes
• Weeks 3-4: Deliver a cash flow forecast and initial runway analysis
• Month 2: Build or refine the operating budget with variance targets
• Month 3: Establish a monthly board reporting cadence and implement basic internal controls

Onboarding plan for a fractional CFO

Use this plan to structure the first three months of the engagement (with modifications to reflect the scope of your agreement). Share it with your fractional CFO before they start, so both sides know what to expect.

Days 1-30:

• Provide access to accounting software, bank accounts (view-only), payroll system, and any existing financial models
• Review the last 6–12 months of financial statements, bank reconciliations, and any existing board reporting
• Conduct a financial health assessment, including cash position, burn rate, and revenue trends
• Meet with the founder, bookkeeper/accountant, and any department heads who manage budgets
• Deliver a 13-week cash flow forecast
• Understand the company’s top 3 financial priorities, and prepare a preliminary action plan
• Establish a weekly check-in cadence with the founder (30 minutes minimum)

Days 31-60:

• Build or refine an operating budget with variance targets
• Build a monthly board reporting package
• Create financial modeling or improve existing models for the P&L, balance sheet, and cash flow projections
• Implement internal controls appropriate for your stage (expense approvals, spending limits, separation of duties)
• If fundraising: begin preparing reports and investor-facing financial materials
• Assess whether additional finance hires are needed (e.g. controller) 

Days 61-90:

• Deliver the first monthly board reporting package 
• Complete the first full review of the budget vs. actual spending
• Document all new financial processes and systems 
• Transition any one-time setup work into recurring workflows
• Conduct a 90-day review: What's working, what needs adjustment, and what the next quarter's priorities should be
• Provide artifacts: documented models, templates, process documentation

If your startup continues to experience growth (and hopefully it does!), eventually, you’ll likely need a full-time CFO. You’ll start to feel the strain from your fractional CFO’s limited availability or lack of full integration into the team. Or, you’ll find that the amount of work exceeds the amount of time your fractional CFO can give.

If you’ve developed a good relationship with your fractional CFO, you can ask for guidance around the timing of a full-time hire. Fractional CFOs know that their roles are not permanent. Another option is to increase the scope of your fractional CFO’s engagement until you’ve reached the maximum of what the person can manage in order to buy yourself some time.

Much like hiring your fractional role, the decision to hire a full-time CFO is a combination of needs and benefits. Working with a fractional CFO should give you a taste of how the role benefits your company. When you’re ready, take that experience, and multiply the impact.

Can a fractional CFO work remotely?

Yes, many fractional CFO work remotely, especially when working with startups. The role depends on access to financial systems, regular check-ins, and clear communication rather than a physical presence. Many fractional CFOs serve clients across multiple time zones. 

How long does a typical fractional CFO engagement last?

Ongoing engagements typically run 6–12 months, at which point a startup may hire a permanent CFO. Project-based engagements, like fundraising preparation or a financial audit, might last 4-12 weeks. The engagement length depends on the complexity of your financial needs and how quickly you're growing.

Does a fractional CFO need to be a CPA or CFA?

CPA or CFA certifications are strong credentials, but it's not required. A CPA tells you that the candidate has accounting expertise, and a CFA has strong investment and valuation skills. But experience with startups is just as important. Prior CFO experience and a track record of helping founders raise capital and manage cash matter more than a specific certification.

What are some common mistakes startups make when hiring a fractional CFO?

One of the most common mistakes is hiring without clear priorities, so the fractional CFO doesn't know what to focus on. Some startups also confuse a role like controller or accountant with a fractional CFO, which requires different skills and has different priorities. A fractional CFO is more strategic versus involved directly in the day-to-day tasks of managing your startup’s finances. 

What should I prepare before my fractional CFO starts?

At a minimum, have your current books ready for review. Gather any existing financial models or board reports and prepare a list of your top 3-5 financial priorities. The more prepared you are, the faster your fractional CFO can move past the initial process of reviewing your financials and dig into the strategic work.