The most common question we get from founders is also the question almost nobody in our industry will answer publicly: what does this actually cost?
Walk through ten fractional CFO websites and you’ll find ten variations of “pricing varies based on your needs — let’s schedule a call to discuss.” This is frustrating for founders trying to budget, frustrating for finance leads building a hiring plan, and frustrating for boards trying to understand whether bringing in outside help is feasible.
We’re going to answer the question. Whether you’re asking “how much does a fractional CFO cost,” “what are typical CFO packages for startups,” or “when should we hire a fractional CFO” — the answers are below. We’ve covered each component of an outsourced back office, what the market actually charges, what drives the variation, and what to watch out for when you’re evaluating firms.
A note on framing: these are market ranges based on what venture-backed Series A and B startups actually pay in 2026. Some firms come in below these ranges. Many come in above. We’ve intentionally written this as a buyer’s guide to the market, not a price list for our own services.
What makes Pegacorn different
Three things, said briefly:
Our scope is broader than most. If a finance, accounting, or HR problem exists at a venture-backed startup, we handle it. Complex revenue recognition under ASC 606, multi-state payroll cleanups, stock comp accounting under ASC 718, pre-audit remediation, equity comp redesign, M&A diligence support — the work other firms refer out, we do in-house. A lot of fractional CFO firms specialize narrow because the hard technical accounting work is, well, hard. We’ve built a team that handles it.
We work with the founder we sold to. Whoever sells you the engagement is on the engagement. Not a partner who hands you to a junior analyst, not a senior person who disappears after the kickoff call. The continuity is structural — we staff engagements to keep them small and senior.
We work within most budgets. We’re not the cheapest firm in this space and we’re not trying to be. What we do is fit a real scope to a real budget. If you have $5K/month to spend on fractional CFO support, we’ll scope an engagement that delivers real value within $5K — not a watered-down version of a bigger package. If your budget genuinely doesn’t fit, we’ll tell you that and recommend a different path.
That’s the pitch. Now the market data.
Why most firms fall short
Before getting into pricing, it’s worth understanding what you’re actually navigating when you evaluate firms in this space. The fractional CFO market has expanded rapidly over the last five years and the quality is uneven. A few patterns we see consistently from founders who come to us after a bad experience elsewhere:
The senior person who sold you isn’t who works on your account. A managing partner runs the sales process, sells you on their expertise, signs the engagement, and hands you to a junior associate with two years of experience. The senior person you trusted reappears for the kickoff call and disappears for the rest of the engagement. By the time you realize what happened, you’ve already spent three months on a deliverable that needs to be redone.
Constant upsells. Every new project is a new SOW. You signed up for fractional CFO support. Three months in, you need help on board materials — that’s an extra $5K. Then audit prep — another $15K. Then financial modeling — another $20K. The base retainer was cheap; the actual total ends up double what you budgeted because every meaningful piece of work was carved out as a separate engagement. Good firms scope inclusively. Less good firms scope to maximize follow-on billing.
Narrow specialization that can’t handle the hard work. Many fractional CFO firms decline to take on complex technical accounting — ASC 606 (revenue recognition), ASC 718 (stock comp), ASC 842 (leases), tax provision work under ASC 740. The reason is that the work is genuinely hard and requires deep technical expertise. When the work surfaces (and at Series B and beyond, it always does), these firms either refer you to outside specialists at additional cost, or worse, do the work poorly and create audit findings later.
Rigid pricing tiers that don’t fit your actual stage. Some firms package their services into “Bronze / Silver / Gold” tiers that bundle in things you don’t need and exclude things you do. The Bronze tier is too thin to be useful; the Gold tier costs more than you can justify. Founders end up paying for capacity they don’t use because the firm won’t scope to their actual needs.
Surface-level work that won’t go deep on the hard problems. This is the most common pattern. A firm runs a basic monthly close, produces standard reports, attends a quarterly board call — and disappears when something genuinely strategic comes up. The fundraise prep, the audit remediation, the operational deep-dive, the technical accounting decision — these are exactly the moments when an experienced operator earns their keep, and exactly the moments when a thin-bench firm goes silent.
The pattern across all of these: the lowest-quality firms compete on price up front and lose value on the back end. The highest-quality firms cost more per month but deliver dramatically more value per dollar over the life of the engagement.
The pricing data below should be read with this in mind. The same monthly retainer at two different firms can produce wildly different outcomes.
The market for the back-office stack
A “back office” for a venture-backed startup typically includes five distinct functions:
- Bookkeeping (the recording of transactions)
- Controllership (the management of the accounting process)
- Fractional CFO (strategic finance leadership)
- HR consulting (people operations, compliance, benefits design)
- Financial modeling and forecasting (the forward-looking analysis)
Here’s what the market typically charges for each.
Bookkeeping
What it includes: Recording every transaction, reconciling bank and credit card accounts, categorizing expenses, processing accounts payable and receivable, maintaining the general ledger, basic monthly reporting.
Market range: $500 to $3,500 per month.
What drives the range:
- Number of monthly transactions (a 10-person startup with one bank account is at the low end; a 50-person company with multi-entity, multi-currency, and complex AR/AP is at the high end)
- Whether you have a modern accounting stack (QuickBooks Online, NetSuite, Sage Intacct) or a legacy mess
- Whether the bookkeeper is also handling AR collections, AP processing, and expense management, or just transaction recording
- Whether your payroll and corporate card systems sync cleanly to the GL (clean stacks like Rippling + Ramp + QBO reduce bookkeeping time dramatically)
The bottom of the range is a basic bookkeeping service. The top of the range is integrated bookkeeping with active AP management, AR follow-up, and tight coordination with your controller.
Controllership
What it includes: Owning the monthly close process, ensuring GAAP-compliance, reviewing bookkeeper work, managing audit-readiness, technical accounting (revenue recognition, stock compensation, lease accounting), preparing monthly financial statements, owning the chart of accounts.
Market range: $2,500 to $8,000 per month.
What drives the range:
- Revenue model complexity (SaaS with ASC 606 considerations costs more than a simple service business)
- Multi-entity, international operations, or complex equity structures
- Audit preparation requirements (a company preparing for first audit needs more controller time than one not yet audited)
- The number of revenue streams and the cleanliness of contracts
Where firms vary widely: Whether they actually do the technical accounting work, or whether they refer it out. ASC 606 (revenue recognition for SaaS), ASC 718 (stock comp), and ASC 842 (leases) are common technical-accounting topics where the depth of the firm matters enormously. Firms that handle this in-house can charge a slightly higher controller rate but eliminate the cost of separate specialist engagements. Firms that refer it out look cheaper at the line-item but cost more once the specialist bills come in.
Fractional CFO
What it includes: Board reporting, fundraising support, financial planning and analysis, scenario modeling, investor communications, cash management, strategic decision support, due diligence preparation, board meeting prep, equity comp strategy, audit oversight.
Market range: $5,000 to $20,000 per month.
What drives the range:
- Hours per month (a Series A company in steady-state may need 20 hours/month; a Series B company actively fundraising may need 60+)
- Seniority required (a former Big 4 partner or public-company CFO commands a premium over a generalist)
- Specialization (deep SaaS metrics experience or biotech accounting commands a premium for those audiences)
- Scope (board-meeting-only engagements are at the low end; full operating CFO engagements with daily involvement are at the high end)
Interim CFO hourly rate: Some fractional CFO engagements are billed hourly rather than as monthly retainers — typical hourly rates range from $200 to $450 per hour depending on seniority and specialization. Hourly arrangements work for short-term, defined-scope projects (board meeting prep, fundraise support, one-off financial modeling). For ongoing operational involvement, monthly retainers almost always produce better outcomes for both sides.
The hidden variable: who actually does the work. Some firms quote $7,500/month for fractional CFO support but the senior partner who sold you the engagement is on it for two hours a month — the rest is handled by a junior associate. Other firms quote $10,000/month and the senior person who sold you is genuinely on the account. The per-hour cost of the second is often lower than the first.
HR consulting
What it includes: Employee handbook development, multi-state compliance, benefits design and broker selection, payroll provider selection and migration, equity comp policy, performance management framework, hiring process design, offboarding policy, employment law compliance reviews.
Market range: $2,500 to $10,000 per month for ongoing HR support; $5,000 to $25,000 for specific project-based work.
What drives the range:
- Whether you need ongoing HR partnership or specific project work (handbook build, multi-state expansion, benefits redesign)
- Number of employees and number of states you operate in
- Whether you need active employee-relations support or strategic HR design only
- Specific compliance needs (California pay transparency, New York’s HR Information Law, multi-state expansion)
Financial modeling and forecasting (proformas)
What it includes: Building investor-grade financial models, bottoms-up revenue projections, headcount planning models, scenario analysis (base/upside/downside), unit economics modeling, cap table modeling, fundraising-ready financial projections (pro formas), board-deck financial sections.
Market range: $7,500 to $35,000 per project. Ongoing model maintenance is typically $1,000 to $4,000 per month.
What drives the range:
- Whether you need a brand-new model from scratch or rework of an existing model
- Complexity of the revenue model (SaaS, marketplace, transactional, hybrid)
- Number of scenarios required
- Whether the model needs to be defensible to a Series B investor (requires deeper rigor, sensitivity analysis, and documentation) vs. an internal planning tool
A flag worth raising: financial modeling is the area where firms most commonly upsell. Engagements that should have been scoped at $20K end up at $40K because every revision and refresh is a new project. Look for firms that include ongoing model maintenance in the CFO retainer rather than carving it out.
The full stack by stage
The most useful way to think about back-office cost isn’t service-by-service. It’s by stage. What does the full stack typically cost for a startup at each phase?
| Stage | Headcount | Typical ARR | Monthly Back-Office Spend | Annual |
|---|---|---|---|---|
| Pre-seed / Seed | <10 | Pre-revenue | $1,000 – $2,500 | $12K – $30K |
| Series A | 10–30 | $1M – $5M | $12,000 – $19,000 | $145K – $225K |
| Series B | 30–100 | $5M – $20M | $17,000 – $26,000 | $200K – $310K |
| Series C+ | 100+ | $20M+ | Hybrid (FTE + project work) | Varies |
Pre-seed / Seed (under 10 employees, pre or just-post first institutional check)
Typical stack: Bookkeeping only, with periodic consulting calls for strategic questions. DIY everything else.
At this stage, you don’t need fractional CFO involvement most months. You need clean books and someone owning AR/AP. The strategic work is doable by the founder.
Series A (10–30 employees, $1M–$5M ARR)
Typical stack: Bookkeeping + Controller, plus a fractional CFO retainer (10–15 hours/month), HR consulting on an as-needed project basis, and a financial model as a one-time project then maintained quarterly.
This is the range where most Series A startups land. It’s dramatically cheaper than hiring a full-time controller ($150K–$200K total comp) plus a full-time CFO ($300K–$400K+) before you actually need them full-time.
Series B (30–100 employees, $5M–$20M ARR)
Typical stack: Bookkeeping + Controller, fractional CFO retainer (20–40 hours/month), HR consulting ongoing retainer, and financial modeling/FP&A integrated into the CFO retainer.
At this stage, the question becomes: when do you replace the fractional stack with full-time hires? The answer is usually some hybrid — bring on a full-time controller around $5M–$10M ARR, keep the fractional CFO until you’re ready for a full-time CFO at $15M–$25M ARR, and keep specialized HR consulting on retainer because it’s hard to justify a full-time head of people until you’re past 75–100 employees.
Series C and beyond
By this point, most companies have transitioned to a full-time controller, sometimes a full-time CFO, and a full-time head of people. The role of an outsourced firm shifts to specialized project work (audit support, fundraising prep, M&A diligence, technical accounting) rather than ongoing operations.
What to actually look for when evaluating firms
Beyond the line-item pricing, here’s what separates the firms worth hiring from the ones that look cheap but cost more in the end.
1. Ask who specifically will be on your account. Not the team. Not the firm. The specific people. Then verify those are the people who show up to your weekly meetings, not just the sales calls.
2. Ask what’s included in the base retainer. Specifically: board meeting prep, ad hoc strategic questions, model updates, audit support, technical accounting research. If most of these get carved out as separate engagements, the headline retainer number is meaningless.
3. Ask about technical accounting depth. Specifically: ASC 606 (revenue recognition), ASC 718 (stock comp), ASC 842 (leases), ASC 740 (income taxes). If the firm can’t speak fluently about these, they’ll either decline the work or do it badly. Both are problems.
4. Ask about the exit path. Good firms work themselves out of a job at the right stage. The right answer to “when should we transition to a full-time hire?” isn’t “as late as possible” — it’s “around $5–10M ARR for the controller, and $15–25M for the CFO, depending on your trajectory.” A firm that doesn’t have a clear view on this is either inexperienced or financially incentivized to keep you longer than you need.
5. Ask for references at similar stage. Not “we worked with TechCorp three years ago when they were public.” References at your stage, in your category, who recently completed similar engagements. If the firm can’t produce them, that’s data.
Common questions
How much does a fractional CFO cost?
Market rates run $5,000 to $20,000 per month, depending on hours, seniority, and scope. For most Series A startups, $5,000–$7,500/month is realistic for 10–15 hours of senior involvement. Series B companies actively raising or preparing for audit often run $10,000–$15,000/month.
What’s the difference between a controller and a fractional CFO?
A controller owns the accounting process — close, GAAP compliance, technical accounting, financial statements. A fractional CFO focuses on strategic finance — fundraising, board reporting, modeling, capital allocation, investor communications. Most Series A and B startups need both, not one or the other.
When should I hire a fractional CFO?
Most startups benefit from fractional CFO support 6–12 months before a major strategic event — a fundraise, an audit, a meaningful operational scale-up, an M&A process. Bringing one in during the event itself is usually too late to be useful.
What’s a typical interim CFO hourly rate?
Hourly rates range from $200 to $450 per hour depending on seniority and specialization. Hourly billing works for short-term, defined-scope projects. Monthly retainers almost always produce better outcomes for both sides on ongoing engagements.
Can fractional CFO firms handle complex technical accounting like ASC 606?
Some can, many can’t. Always ask specifically about ASC 606, ASC 718, ASC 842, and ASC 740 experience before engaging — these come up at every venture-backed startup eventually. Firms that decline the work or refer it out create downstream cost and audit risk.
What does a fractional CFO actually do day-to-day?
Depends on the engagement. Common responsibilities include monthly board reporting, cash flow management, financial modeling and scenario planning, fundraise preparation, investor communications, audit oversight, equity compensation strategy, and acting as the senior finance voice in major business decisions.
Do I need a fractional CFO or a fractional controller first?
A controller, almost always. The strategic work a CFO does is built on top of clean financial reporting and a working close process. If your books are a mess, no fractional CFO can deliver value. Get the controller layer right first.
What should I look for in a startup auditor?
Most startups searching for a “startup auditor” actually need pre-audit support before they engage an audit firm — getting the books, controls, documentation, and technical accounting positions in shape so the audit itself goes smoothly. The audit firm you select matters less than the prep work you’ve done before they start. We’ve covered this in our first audit playbook.
When to bring us in
Pegacorn Group works with venture-backed Series A and B startups on the full back-office stack. Our engagements are designed to integrate, so you have one firm coordinating the whole back office rather than five vendors with handoff problems.
You probably don’t need us if you have a strong in-house finance team and just need transactional bookkeeping help. There are plenty of low-cost bookkeeping providers that handle that well.
You likely do want to talk to us if:
- You’re a Series A or B startup and your back-office spend is unclear, unmanaged, or growing in ways that don’t track with your actual needs
- You’re preparing for a fundraise, an audit, or an M&A event and need the finance function to be defensible
- You’ve inherited an accounting mess and need someone to clean it up and run it cleanly going forward
- You’re past 25 employees and the HR compliance work is exceeding your current capacity
- You want senior judgment on a strategic question — equity comp, fundraising timing, headcount planning, technical accounting — without committing to a full-time hire
- You’ve worked with another firm and dealt with one or more of the patterns above
Let’s talk. The first conversation is free, and you’ll leave it with a clear sense of whether we’re the right fit and what a realistic scope looks like for your situation.
This post pairs with: Building an accounting function at a startup, When to hire your first HR person, How to administer payroll and 401(k) plans at a startup, and Why your Series B isn’t worth 50x ARR.