Most founders hiring a fractional CFO for the first time have a vague sense that they need “better financial management — tools like ProfitBooks can help streamline this” but aren’t sure what that actually means in practice. What does a fractional CFO do in week one? What do they produce? How do you know if they’re delivering?
This guide clarifies what fractional CFOs actually deliver — broken down by the specific responsibilities and the week-one priorities that set every engagement up correctly. For more on this topic, see our guide on fractional CFO.
The Four Functional Areas
Financial Reporting and Analysis
The baseline function. A fractional CFO ensures you have accurate, timely financial statements (P&L, balance sheet, cash flow) and that you understand what they’re telling you. Beyond the basics, this means:
- Building or improving your management reporting package — the monthly dashboard that gives leadership a clear view of financial performance
- Setting up KPI tracking that connects operational metrics to financial outcomes
- Ensuring your accounting is clean and audit-ready (especially important ahead of fundraising)
- Identifying and explaining variances from budget or plan
If your monthly close takes more than two weeks, your financial reports are inconsistent with your bank statements, or you don’t have a management dashboard — fixing these is typically week-one work. For more on this topic, see our guide on when to hire a fractional CFO.
Financial Planning and Analysis (FP&A)
This is where fractional CFOs create the most strategic value: translating financial data into forward-looking decisions.
- Building or maintaining your financial model — the 12–36 month projection that maps your business plan to financial outcomes
- Running scenario analysis: what happens if we hire 5 people in Q2 vs. Q3? What’s the runway impact of a new product investment?
- Annual budgeting and quarterly reforecasting
- Unit economics: customer acquisition cost, lifetime value, payback period, contribution margin by product or channel
Cash and Treasury Management
Cash management is often the most urgent need when a fractional CFO starts: For more on this topic, see our guide on scaling with a part-time CFO.
- 13-week cash flow forecast: where will cash be in 90 days under different scenarios?
- Vendor payment prioritization and timing
- Banking relationship management — including credit facilities if appropriate
- Payroll and AP/AR optimization for cash flow purposes
Fundraising and Investor Relations
For companies raising capital, the fractional CFO is typically the primary interface between the business and financial due diligence:
- Building the financial narrative for the investor pitch
- Managing the data room — the organized collection of financial documents investors request
- Responding to investor due diligence questions
- Negotiating financial terms (valuation, option pool, conversion mechanics)
- Post-close financial reporting requirements for investors
Week-One Priorities
What a good fractional CFO focuses on in the first five days: For more on this topic, see our guide on onboarding best practices.
Day 1–2: Access and orientation. Get into all financial systems — accounting software, banking, payroll, equity management. Review the last 12 months of financial statements. Understand the current state before diagnosing problems.
Day 3: Map the gaps. Where are the biggest financial risks or opportunities? This is usually one of: cash runway, reporting quality, financial model accuracy, or burn rate management. Identify the top three priorities before the end of day three.
Day 4–5: Stakeholder conversations. One-on-ones with the CEO, COO, and relevant department heads. Understand what decisions they’re trying to make and what financial information they wish they had. Their frustrations tell you more about the actual priorities than any financial analysis does.
End of week one: Initial read-out. A brief verbal or written summary of what you’ve found and what you’re going to focus on first. This establishes credibility and gets alignment before execution begins.
What a Fractional CFO Is Not Responsible For
Setting expectations clearly prevents friction. A fractional CFO at 15 hours per week is not responsible for: day-to-day bookkeeping (that’s your controller or bookkeeper), payroll processing (that’s HR/operations), or being available for ad hoc financial questions at all hours.
Frequently Asked Questions
Do I still need a bookkeeper if I have a fractional CFO?
Yes. A fractional CFO works with financial data — they don’t produce it. You still need someone doing day-to-day data entry, reconciliation, and transaction processing. The fractional CFO reviews and analyzes what the bookkeeper or controller produces.
When should a fractional CFO relationship transition to a full-time hire?
The most common triggers: raising a Series B or later, revenue above $15–20M where financial complexity justifies a dedicated full-time resource, or a transaction (acquisition, IPO) that requires full-time financial leadership. For companies below those thresholds, fractional is usually the right model. See our comparison guide: Fractional vs. Full-Time Executive: How to Decide.