Fractional CFO vs in-house controller: what healthcare clinics actually need
TL;DR: A controller and a CFO are not interchangeable. A controller closes the books and runs internal controls. A fractional CFO uses those books to set pricing, model expansion, and stress-test cash. For most clinics between $3M and $20M, hiring a full-time in-house controller (Sorso estimates about $204,000 a year with benefits, from the BLS median of $166,570 for financial managers) before you have a CFO-grade strategic layer is putting accuracy ahead of judgment. The better sequence is usually: solid outsourced controller function plus a fractional CFO, then add an in-house controller when daily transaction volume justifies it.
Option A
Fractional CFO
Senior strategic finance leader, engaged 10-20 hours per week. Owns forecasting, payer mix analysis, expansion economics, capital structure, and the financial story behind major decisions. Brings pattern recognition from working across many clinics.
Option B
In-house controller
Full-time W-2 employee responsible for monthly close, account reconciliation, internal controls, and the accuracy of the financial statements. Manages the accounting team, supports audit and tax prep, and owns the general ledger day-to-day.
| Category | Fractional CFO | In-house controller |
|---|---|---|
| Annual cost | From $48,000/yr (Sorso fractional CFO starts at $4,000/mo) | BLS puts the median financial manager, the category controllers fall under, at $166,570/yr. Benefits, payroll taxes, and overhead land on top of that. |
| Primary deliverable | Forward-looking financial decisions: forecasts, scenarios, capital plans, payer renegotiation analysis, expansion modeling | Backward-looking financial accuracy: closed books, reconciliations, internal controls, audit support |
| Typical week | Reviews KPIs, runs scenario models, joins leadership meetings, advises on hiring and capital, prepares board or partner materials | Reviews journal entries, manages bookkeepers, oversees AP/AR, prepares monthly statements, handles auditors and tax preparers |
| Healthcare expertise | Because a fractional CFO works with several practices at the same time, patterns in payer mix, denials and provider economics show up faster. Pattern recognition on payer mix, denial trends, provider economics, and what a healthy P&L for your size and specialty looks like. | Highly variable by hire. Most controllers come from general business backgrounds and pick up healthcare-specific nuances gradually, on the job. |
| Time to value | First findings in 30 days. Strategic plan in 60-90 days. Specialists arrive with playbooks from similar clinics. | Productive in 3-6 months. Recruiting takes months, plus agency fees, and the controller then needs additional time to learn your systems before producing reliable monthly reporting. |
| Management overhead | Self-directed. Shows up with a framework, runs it, and exits cleanly when the engagement changes. | You manage hiring, performance reviews, PTO, professional development, and replacement when they leave. Add 5-10 hours per month of leadership time. |
| Turnover risk | Firm-based engagement. If your specific contact leaves the firm, the firm continues service and transitions another senior person in. | Single point of failure. When a controller leaves, the institutional knowledge leaves too, and the next hire rebuilds it from scratch. Turnover means a disrupted close and months spent ramping up the next hire. |
| Strategic depth | Deep across multiple engagements. Knows what works at $5M, $10M, $20M because they have run finance at each stage. | Generally not the strategic seat. A controller who is asked to do CFO work either declines or delivers operator-level recommendations rather than capital-allocation analysis. |
| Scalability | Hours flex up during M&A, expansion, or fundraising. Flex down during steady state. You pay only for what you use. | Fixed cost. Over-resourced during quiet months, under-resourced during growth or transactions. |
| Exit cost | 30-day notice. No severance, no recruiting fees. | Severance, replacement recruiting fees, a lengthy search, plus months of ramp time on the next hire. |
| Best for | Clinics $3M-$20M that need strategic financial leadership but do not have the daily transaction volume to justify a $150K+ employee | Clinics $20M+ with daily transaction complexity, multi-entity structures, or a real-time treasury and AR function that warrants a full-time seat |
Most clinics under $20M need CFO-grade judgment before they need a full-time controller.
A common pattern: books are messy, owner hires an in-house controller for $150K plus benefits to clean things up. Six months later the books are accurate and the owner still cannot answer the questions that matter: which payer contracts are losing money, what the next location needs to break even, whether the expansion plan is fundable. Accurate financials are not the same thing as financial leadership. For most clinics in the $3M-$20M range, the better setup is an outsourced firm handling the controller function (monthly close, reconciliation, internal controls) plus a fractional CFO for the strategic layer. Total cost is typically $7K-$10K per month, roughly half the loaded cost of a single full-time controller, and you get both operational accuracy and strategic judgment. You add a full-time in-house controller when daily transaction volume genuinely needs a full-time seat, usually above $20M or when you are running multiple entities with intercompany activity.
Frequently Asked Questions
What does an in-house controller actually cost when you include benefits?+
BLS counts controllers among financial managers, whose median annual wage was $166,570 in May 2025, before benefits. Pay varies by company size and region: the top 10 percent of financial managers earn more than $323,270 a year. With benefits and payroll taxes at the rate BLS measures for management, business and financial staff, that comes to about $204,000 a year (Sorso estimate: $166,570 × 1.226), before software, training and your own management time. That is the number to compare against fractional alternatives.
Can a fractional CFO also do controller work?+
Sometimes, for short stretches. A senior fractional CFO can stand up the controller function, fix bad processes, and run close for 60-90 days. Long-term, it is usually the wrong use of CFO time. Better setup: outsourced accounting firm or in-house bookkeeper handles daily controller work, fractional CFO handles strategy. They complement each other.
Which should I hire first if my books are a mess?+
Fix the books first. A CFO needs reliable inputs to do useful forecasting. If your accounting is unreliable, start with an outsourced healthcare-specialized accounting firm to clean up and stabilize close. Once monthly reporting is trustworthy, layer in fractional CFO services. This sequence usually takes 60-90 days and avoids paying CFO rates for what is really controller work.
When does a clinic actually need a full-time in-house controller?+
Common triggers: revenue above roughly $20M, multiple legal entities with intercompany transactions, daily treasury management with active cash positioning, an internal audit function, or imminent transaction prep where you need someone in the building daily. Below those thresholds, an outsourced controller function plus fractional CFO almost always wins on cost and capability.
What if I already have a full-time controller and want to add CFO capacity?+
That is a clean handoff. Your controller continues owning monthly close, controls, and statement accuracy. Your fractional CFO works one layer up: forecasting, scenarios, capital allocation, and strategic decisions. The two roles do not overlap. This setup works well for clinics that already have an in-house accounting team but want CFO-grade thinking without paying for a full-time CFO, which Sorso estimates at about $242,000 a year with benefits.
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Founder of Sorso and a CFA charterholder. Before Sorso, Stan spent 19 years in corporate finance at institutions including UniCredit and Société Générale — managing a $450M loan portfolio and making senior partner at a major mezzanine lender by 29 — then built a fractional CFO firm exclusively for outpatient healthcare clinics.