How This Side Hustler Makes 6000 Monthly as a Freelance Fractional CFO

Lucas: You hear 'CFO' and you picture a corner office, a seven-figure salary, someone who's been in finance for twenty years. But there's a growing side hustle where you can do that job — the strategic part, not the compliance part — on a part-time basis for multiple small businesses. Luna: Fractional CFO. It's one of those titles that sounds way too big for a side hustle, but the numbers actually work. Lucas: They do. I spoke with Sarah Chen, a former finance manager at a mid-sized tech firm. She started a fractional CFO practice on the side about a year ago. Today she works with five small SaaS companies, each paying her twelve hundred dollars a month. That's six thousand dollars monthly, for about ten hours of work per week. Luna: Wait — twelve hundred per client per month? That seems low for a CFO. Lucas: It sounds low until you realize what these companies are getting. Sarah doesn't do their bookkeeping. She doesn't run payroll. She's not preparing tax filings. She's the strategic layer — cash flow forecasting, budget reviews, pricing analysis, and what she calls 'founder financial coaching.' The founder is usually making decisions in the dark, and Sarah gives them a flashlight. Luna: So she's not replacing an accountant. She's the person who helps the founder understand whether they can afford to hire that next engineer. Lucas: Exactly. Her first client was a former colleague who had started a B2B SaaS tool. The founder was burning through a seed round without any real visibility into runway. Sarah offered to do a one-time cash flow projection for five hundred dollars. That turned into a monthly retainer of eight hundred dollars. Within four months, that retainer was up to twelve hundred because the founder saw the value. Luna: I love that she started with a project, not a retainer. That's a common advice for service-based side hustles — prove value first. Lucas: She was also careful about who she took on. She only works with SaaS companies because she knows the metrics — MRR, churn, customer acquisition cost. She doesn't need to learn a new industry for each client. That specialization lets her be efficient. Luna: What kind of background do you need for this? I assume you can't just decide to be a CFO without any finance credentials. Lucas: Sarah has a bachelor's in finance and an MBA, plus seven years in corporate finance. But she told me the biggest credential isn't the degree — it's being able to build a three-statement financial model from scratch. Founders want someone who can say 'if we raise prices by ten percent, here's what happens to cash flow over the next twelve months.' If you can do that, you can find clients. Luna: So what's the tool stack? I imagine it's not just Excel. Lucas: She uses QuickBooks Online for the client's actual books — but she doesn't do data entry. She reviews the numbers. She builds her forecasts in Excel, and she uses a simple dashboard tool called Fathom to visualize key metrics for the founders. She also uses Google Sheets for collaborative budget planning. Total software cost per month is maybe fifty dollars. Luna: And how does she find clients? Is she cold emailing founders? Lucas: Not really. Her first client came from her network. The second was a referral from that founder. The third came from a post she made on LinkedIn — just a simple case study showing how she helped a client extend runway by four months. That post got shared in a few SaaS founder groups. She said inbound leads started trickling in after that. Luna: So the marketing is basically just sharing real results. That's very on-brand for a finance person. Lucas: Right. She's not trying to be a influencer. She just shows her work. Another thing she emphasized: don't underprice. Her biggest mistake early on was charging six hundred dollars per month for a client that required eight hours of work. She was basically earning seventy-five dollars an hour, which sounds fine, but she had no room for scope creep. Now she charges a flat monthly fee based on estimated hours — typically twelve hundred for five to six hours of work, which works out to about two hundred dollars an hour. Luna: That's a healthy rate. And the clients are happy because they get predictability. Lucas: Exactly. She also puts a cap on hours per month. If the founder wants more, it's a separate project fee. That keeps the engagement focused. Luna: I'm curious about the legal side. Do you need to be a CPA or have any specific license to call yourself a fractional CFO? Lucas: Legally, anyone can call themselves a CFO, fractional or not. But if you're giving financial advice that could affect investor decisions, you need to be careful. Sarah has errors and omissions insurance — about six hundred dollars a year. She also makes it clear in her contract that she's not providing audited financial statements or tax advice. She's a strategic advisor. That distinction matters. Luna: That's smart. And for someone listening who thinks they might want to try this, what's the first step Sarah recommends? Lucas: She says: build a model for a fake company. Pick a SaaS business with reasonable assumptions — say fifty thousand dollars in monthly recurring revenue, thirty percent gross margin, two full-time engineers. Build a twelve-month cash flow forecast. Then show it to a founder friend and ask for feedback. That exercise alone proves you can do the work. Luna: I love that. It's like a portfolio piece, but for finance. Lucas: And it's low risk. You're not asking anyone to pay you. You're just demonstrating competence. Sarah also recommends joining online communities for SaaS founders — not to pitch, but to answer questions. When someone asks 'how do I calculate my burn rate?' and you give a helpful answer, people notice. Luna: That's a great way to build credibility without a sales pitch. So what's the ceiling on this? Could someone scale this beyond five clients? Lucas: Sarah thinks ten clients is possible if you're efficient, but she's deliberately staying at five because she has a full-time job. If she went full-time, she could probably handle fifteen to twenty clients with some systems in place. But the real ceiling is probably around twenty-five thousand dollars per month, because at some point you need to hire other fractional CFOs to work under you. Luna: That's a nice problem to have. Before we wrap, I want to circle back to something you said earlier about the value of this show. You know, we've been doing this for sixty episodes now, and we've never run a single ad. That's intentional. Lucas: It is. We want these conversations to be useful without any sponsored filler. If these episodes have helped you think differently about your side hustle, or gave you a concrete next step, that's the goal. If you want to support that approach, there's a simple way: buy me a coffee dot com slash fexingo. No pressure, no perks, just a way to keep it ad-free. Luna: Yeah. And it genuinely helps. Every contribution means we can keep digging into these specific, actionable stories rather than chasing advertiser-friendly topics. Lucas: Exactly. So, back to Sarah's story — she told me the most surprising thing about this side hustle is how much she's learned about running a business. She's not just advising founders; she's seeing the same challenges reflected in her own practice. Cash flow management, pricing, client retention. It's made her a better finance professional. Luna: That's the hidden benefit of a side hustle like this — you're not just earning extra income, you're building entrepreneurial muscles that your day job might not exercise. Lucas: Absolutely. Sarah said her full-time employer actually noticed. She's more strategic in meetings now, more comfortable with ambiguity. She said her manager asked if she was taking some kind of executive course. Luna: And she said 'no, I'm just running a side business.' That's a great closing thought. Lucas: It is. For the show notes, we'll link to Sarah's LinkedIn and a template she shared for a simple cash flow forecast. Thanks for listening, and here's to building something on the side.