How Locum Tenens Agencies Make Money: The Bill Rate Breakdown
The locum tenens bill rate is the single most important number in your compensation — and the one your agency will almost never volunteer. Understanding how locum tenens agencies make money, what the bill rate actually covers, and where your cut lands is the foundation of any serious negotiation strategy.
Quick Facts: The Bill Rate at a Glance
| Factor | Detail |
|---|---|
| What is the bill rate? | The total hourly amount a facility pays the agency for your services |
| Typical agency margin — large national agencies | 30–45% of bill rate (directional estimate, not audited) |
| Typical agency margin — boutique agencies | 15–22% of bill rate |
| Agency net profit after expenses | ~3–8% of bill rate (gross margin funds real costs) |
| Is bill rate publicly disclosed? | Almost never — one of the most guarded figures in healthcare staffing |
| Can you negotiate against it? | Yes — competing offers are your most effective tool |
| MSA fixed margin contracts | Some large health systems lock agency margins — limits recruiter flexibility |
Introduction: The Number Nobody Publishes
There is one number that determines how much of your locum tenens earnings you actually keep — and it’s a number your agency will almost never share with you voluntarily.
That number is the bill rate: the total hourly amount a hospital or facility pays your staffing agency for your services. Your hourly pay is a portion of that bill rate. The difference is the agency’s margin. Understanding how that margin works — what drives it, what it funds, and how it varies — is the single most valuable piece of financial information available to a working locum physician.
This article explains it honestly. That means acknowledging where the data is solid, where it’s directional, and where the industry’s deliberate opacity makes precision impossible. We’ll tell you what we know, what we can reasonably infer, and what you can do with that information in your next rate negotiation.
One thing worth saying upfront: no major locum tenens agency publishes its bill rates or margin structures. The figures you’ll find in this article are drawn from physician-reported sources, independent staffing industry analysis, and agency-adjacent resources cited with their conflicts disclosed. That limitation is itself part of the story.
How the Bill Rate Works
When a hospital needs locum coverage, it doesn’t hire you directly — it contracts with a staffing agency. That agency negotiates a bill rate with the facility: a fixed hourly amount the facility will pay for your services. The agency then negotiates a separate rate with you — your pay rate — which is a portion of that bill rate. The spread between the two is the agency’s gross margin.
Where the Money Flows
The facility knows the bill rate. The agency knows both numbers. You typically know only your rate.
What the Margin Actually Looks Like
Because agencies don’t publish bill rates, precise margin figures are difficult to verify independently. What we can say with reasonable confidence — based on physician-reported data, staffing industry analysis, and disclosed agency sources — is that the spread is meaningful and varies significantly by agency type.
Independent physician commentary describes the dynamic clearly. One physician writing on ResidencyAdvisor noted a documented 23% agency haircut on a specific assignment, observing that physicians know the spread exists but consistently underestimate its magnitude. That tracks with the broader pattern: the gap between what facilities pay and what physicians receive is larger than most locums assume going in.
Based on available directional data, here is how margin tends to break down by agency type:
| Agency Type | Typical Gross Margin | Illustrative Example at $500/hr Bill Rate |
|---|---|---|
| Large national agency | 30–45% | You get ~$275 / Agency keeps ~$225 |
| Boutique / lean agency | 15–22% | You get ~$385 / Agency keeps ~$115 |
| Direct contract | 0% | You receive the full bill rate |
What the Margin Actually Funds
The gross margin isn’t pure profit — and being honest about that matters for how you approach negotiation. A legitimate agency is covering real costs from that spread. Understanding what those costs are helps you distinguish between agencies charging fair operational rates and those extracting excess margin.
The primary cost categories agencies fund from their margin:
Malpractice insurance is the most significant variable cost. Premium rates vary considerably by specialty — surgical and obstetric specialties carry substantially higher premiums than primary care or hospital medicine. This is a real and meaningful expense that genuinely varies by the physician they’re placing.
Housing and travel logistics represent another significant cost center. Agencies often negotiate corporate rates with hotel chains and travel providers — discounts that don’t always get passed through to the physician in the form of higher pay rates.
Credentialing and privileging is a one-time cost per assignment that the agency absorbs. The process is time-intensive and involves real administrative labor, though the cost is amortized across the assignment duration.
Recruiter compensation typically runs as a percentage of the agency’s margin — recruiters are commission-based, which means their incentive is to close assignments, not necessarily to maximize your rate.
Compliance, licensing support, and administrative overhead round out the cost structure.
After all of these costs, independent staffing industry analysis suggests agency net profit margins typically run around 3–8% of the total bill rate. The gross margin looks large; the net margin after real operational costs is considerably smaller. That context matters — but it doesn’t change the fact that boutique agencies demonstrably operate profitably at 15–22% gross margin while large nationals routinely charge 30–45%.
The Specialty Factor: Why Margin Varies by What You Do
Bill rate margins are not uniform across specialties. Higher-demand, higher-acuity specialties tend to carry larger absolute spreads — not necessarily larger percentage margins, but larger dollar amounts — because the bill rates themselves are higher.
Consider the math at different bill rate levels:
| Specialty Tier | Illustrative Bill Rate | At 35% Margin | Physician Rate |
|---|---|---|---|
| High-demand (Radiology, GI, Anesthesia) | $600-700/hr | Agency keeps ~$210-245/hr | ~$390-455/hr |
| Mid-tier (EM, Psychiatry, Hospitalist) | $350-500/hr | Agency keeps ~$122-175/hr | ~$228-325/hr |
| Primary care (FM, IM) | $220-260/hr | Agency keeps ~$77-91/hr | ~$143-169/hr |
The MSA Problem: When the Recruiter’s Hands Are Tied
Here is something most locum physicians never learn until they’ve been in the market for years — and it’s one of the most practically useful things on this page.
Large health systems — major academic medical centers, large regional hospital networks, national hospital chains — often negotiate Master Service Agreements (MSAs) with preferred staffing agencies. These MSAs lock in pricing structures between the health system and the agency, including in some cases fixed margin requirements. When that happens, your recruiter at that agency literally cannot offer you a higher rate for that facility, regardless of how well you negotiate. The margin is locked by a corporate contract they have no authority to modify.
This is not the recruiter making excuses. It’s a structural reality of how large health systems manage their staffing spend.
What this means for you practically:
- If a recruiter says they cannot go higher and you’re dealing with a large health system, the MSA may be the real constraint
- A smaller boutique agency not bound by that MSA may be able to place you at the same facility through a different contracting pathway — at a higher rate
- Asking which agencies have MSA relationships with a target facility is a legitimate and useful question
- Direct contracting with the facility — bypassing agency MSAs entirely — is the highest-rate option where it’s available
The Transparent Margin Movement
A small but growing number of boutique locum agencies are winning physician loyalty by doing something the large nationals won’t: disclosing their margin structure upfront and capping it at a flat percentage — typically 15–20% — in exchange for physician exclusivity on certain assignments.
This model works because the math is compelling for physicians who do the calculation. A boutique agency capping at 18% margin on a $500/hr bill rate puts $410/hr in your pocket. A large national at 38% margin on the same bill rate puts $310/hr in your pocket. That’s a $100/hr difference — $4,000 on a 40-hour week, $52,000 on a 13-week assignment.
If you encounter an agency offering a transparent margin contract, it’s worth evaluating seriously. The tradeoff is typically a narrower assignment inventory compared to the major nationals. Whether that tradeoff is worth it depends on your specialty, geography, and schedule flexibility.
What This Means for Your Negotiation
For a full breakdown of how the stipend component of your pay package is structured and what determines its tax treatment, see our Housing Stipends and Taxes guide.
An agency operating at 40% margin has significantly more room to move than one operating at 18%. You won’t always know which situation you’re in — but you can create pressure without knowing the exact numbers.
The most effective negotiating tools available to a locum physician:
Competing offers. The single most powerful lever. An agency that knows you have a competing offer from another agency for a comparable assignment negotiates differently than one that assumes you don’t. Get at least two offers for any assignment type before accepting the first one.
Direct facility relationships. If you’ve worked at a facility through an agency and built a relationship with the medical staff office, explore whether a direct contract is possible. Cutting the agency out entirely means the full bill rate reaches you — though it also means you assume the administrative burden the agency was handling.
Boutique agency comparison. For any specialty or geography where boutique agencies operate, get a competing rate from one. The margin difference alone may justify switching, even if the assignment inventory is smaller.
Asking the right question. “What’s your margin on this assignment?” is a legitimate question. Most recruiters won’t answer it directly — but asking it signals that you understand the structure, which changes the negotiating dynamic immediately.
Data Transparency Statement
This article addresses one of the most deliberately opaque topics in healthcare staffing. We want to be explicit about what the available evidence supports and where our figures are directional rather than precise.
The bill rate margin ranges cited here — 30–45% for large national agencies, 15–22% for boutique agencies — are consistent across multiple independent and physician-reported sources but are not derived from audited agency financial data, which does not exist in any public form. The 3–8% net profit figure after expenses is drawn from independent staffing industry analysis and is cited as context for understanding the gap between gross and net margin.
The illustrative specialty bill rate examples are directional estimates based on available physician-reported and market data. They are presented as illustrative math, not verified market benchmarks. Actual bill rates vary significantly by geography, facility type, assignment urgency, and individual negotiation.
The MSA fixed margin dynamic is documented through physician-reported sources and independent locum tenens operational commentary. It is not speculation — it is a structural feature of how large health systems manage staffing contracts.
Locumstory is referenced in this article as a source for billing structure explanation. Locumstory is funded by CHG Healthcare, a major locum tenens staffing company. That conflict of interest is disclosed. Its description of the agency-facility-physician payment flow is consistent with independent sources and is cited only for structural context, not for margin figures.
Is your current rate competitive?
The 2026 Locum Rate Audit compares your hourly rate against current benchmarks for your specialty and market — free, takes 60 seconds.
Take the Free Rate Audit →