What Is Bill Rate vs Pay Rate?

In success-fee staffing, the bill rate is the hourly or daily amount charged to the client facility for a placed clinician or professional. The pay rate is the amount paid to the placed individual. The difference between the two is the spread, and it is the only source of gross margin in a contingent staffing model.

How the Spread Works in Practice

A locum tenens staffing firm contracts with a rural hospital to provide a hospitalist for thirty days. The hospital agrees to a bill rate of $185 per hour. The staffing firm contracts with the physician at a pay rate of $145 per hour. The spread is $40 per hour. On a 168-hour coverage block, that generates $6,720 in gross margin before the firm's costs of recruitment, credentialing, travel, and malpractice coverage.

The math is direct. The risk is also direct.

The firm pays the physician whether or not the hospital pays on time. The firm carries the payroll tax burden, the workers' compensation policy, and the professional liability tail. The spread must cover all of this and leave enough to account for the fact that not every placement fills, and not every filled placement collects.

Some firms quote bill rates as "all-inclusive" figures that bundle the clinician's pay, the firm's fee, and pass-through costs like travel and housing. Others quote bill rates as base rates with expenses billed separately. The pay rate is almost always expressed as a straight hourly or daily figure to the clinician, though some long-term locum contracts include completion bonuses or call-pay differentials.

Markup vs. Spread

Recruiters sometimes describe the relationship as a markup percentage. A bill rate of $200 and a pay rate of $150 is a 33 percent markup. The same relationship produces a 25 percent margin. The two figures are not interchangeable. A firm running at 25 percent gross margin with high back-office costs and slow collections may be less profitable than a firm running at 18 percent margin with automated credentialing and direct hospital relationships.

The markup language is more common in travel nursing and allied health. The spread language dominates in physician locum tenens and interim executive placement. The underlying mechanic is identical.

Why the Spread Determines Firm Viability

The owner of a locum tenens staffing firm lives inside this gap. If the spread is too narrow, the firm cannot survive a single bad placement. A physician who departs early, a hospital that disputes hours, or a credentialing delay that pushes back start date can erase the margin on an entire engagement.

If the spread is too wide, the hospital contracts directly with competitors or builds an internal pool. The market for hospitalist coverage in a given region is not infinite. Competing on spread alone is a race to the bottom.

The pay rate is constrained by the clinician's alternative options. A hospitalist with active licenses in three states and no exclusivity agreement can command a premium. A new graduate in a saturated specialty cannot. The bill rate is constrained by the hospital's budget, which is often a fixed line item approved months in advance.

The firm owner must negotiate both sides simultaneously. This is the central operating tension of the business.

Hidden Costs That Erode the Spread

Travel reimbursement is the most common leak. A firm that quotes a flat bill rate and absorbs unlimited travel costs will discover that rural placements in expensive markets consume the margin. Malpractice insurance for certain surgical specialties runs into five figures per placement. Credentialing staff time is rarely tracked to individual engagements but accumulates across the portfolio.

Some firms address this by negotiating bill rates that escalate after a threshold number of hours, or by passing travel through as a separate line item. Others build geographic density so that clinicians can drive rather than fly, reducing the pass-through. The specific mechanism matters less than the discipline of knowing where the margin actually lands after all costs.

Where Staffing Firms Misread the Relationship

The most expensive mistake is conflating the bill rate with revenue. A signed contract with a $210 bill rate and a $165 pay rate looks like a $45 spread. If the hospital pays net-60 and the clinician must be paid weekly, the firm is financing the gap with its own working capital. If the hospital disputes 20 percent of hours based on timesheet formatting, the effective spread collapses.

Another common error is setting pay rates based on clinician requests rather than market position. A recruiter who raises the pay rate to $170 to win a candidate, without confirming the hospital will accept a higher bill rate, has inverted the model. The firm is now paying to place someone.

Some firms also fail to track spread by specialty and geography. A firm-wide average of 22 percent margin sounds healthy. It may conceal that emergency medicine placements run at 31 percent while psychiatry placements run at 9 percent because of state licensing bottlenecks and high malpractice costs. The firm owner who cannot see this by line item is managing blind.

Related Terms in Success-Fee Staffing

Practitioners in this vertical should also understand Contingency Search, the model used for permanent placement where the fee is a percentage of first-year salary rather than an hourly spread. Direct Placement Fee operates similarly but with a retained or exclusive structure. Credentialing is the process that determines whether a clinician can start, and its duration directly affects how many billable hours a placement produces. Locum Tenens is the specific practice area where bill rate and pay rate dynamics are most pronounced. Temp-to-Perm arrangements introduce conversion fees that complicate the simple spread model.

A locum tenens staffing firm owner looking to build a predictable client pipeline can find the relevant ROI Wire program on the Locum Tenens Staffing industry page. For additional terms in this vertical, return to the Success-Fee Staffing glossary hub.