Very few strategies in staffing can improve contractor retention, raise take-home pay, lower payroll tax exposure and strengthen recruiting all at once. A properly structured staffing firm per diem program is one of them, and the 50-mile rule is usually where the conversation starts.
Yet many staffing firms either don’t fully understand how it works or avoid it because they assume it is too complicated or risky. In reality, when it is structured correctly and administered under IRS rules, non-taxable per diem can be a real competitive advantage for firms with travel assignments, remote projects or long-distance placements.
For staffing companies in healthcare, construction, IT, engineering and project-based staffing, understanding how staffing firm per diem works can create a meaningful financial edge.
What is the 50-Mile Rule?
Under IRS rules, a worker who travels away from their tax home for a temporary work assignment, long enough to need sleep or rest, may be considered “away from home” for tax purposes. When that happens, an employer can reimburse lodging, meals and incidental expenses tax-free through an accountable plan.
In staffing, this usually applies when contractors travel 50 miles or more from their permanent residence to work an assignment. But the “50-mile rule” is an industry rule of thumb, not an IRS rule. Distance alone doesn’t qualify anyone. What the IRS looks at:
- A real tax home. The worker keeps a permanent residence they continue to pay for while on assignment, so they are duplicating living expenses. A worker with no regular home is considered itinerant and can’t receive tax-free travel reimbursements.
- A temporary assignment. Work realistically expected to last, and actually lasting, one year or less is temporary. An assignment expected to last longer than a year is indefinite, and reimbursements for it are taxable.
- Real travel expenses. The worker actually incurs lodging, meal and travel costs because of the assignment.
When these conditions are met, part of what the contractor receives can be paid as a non-taxable reimbursement instead of taxable wages. That can make a big difference in both the contractor’s take-home pay and the firm’s payroll tax costs.
Why Staffing Firm Per Diem Matters
Most staffing firms spend a lot of time on sales, recruiting and client relationships. Far fewer look at how the compensation structure itself can become a strategic advantage.
Contractors care less about gross pay than about what actually lands in their bank account each week. Qualifying reimbursements under an accountable plan aren’t subject to income tax withholding, Social Security, Medicare, FUTA or state unemployment tax. So a compliant staffing firm per diem program can put more money in a traveling contractor’s pocket, and the firm doesn’t pay employer payroll taxes on the reimbursement portion.
For firms in travel nursing, construction, industrial staffing, engineering, disaster recovery and IT consulting, that can be an important differentiator. It also affects how much you keep on each assignment. Our guide to how staffing agencies make money walks through how per diem fits into the bill rate on travel assignments.
How Per Diem Structures Work
Imagine a staffing firm places a contractor on a 12-week assignment 120 miles from the contractor’s home. The contractor keeps paying rent or a mortgage at home but needs to stay near the worksite during the week, so they are paying for lodging, meals and travel they wouldn’t have if they worked locally.
In that case, the firm may pay the contractor:
- Taxable wages for hours worked, for example $1,700 a week, and
- A non-taxable per diem for qualifying lodging, meals and incidental expenses, for example $700 a week.
The per diem has to be tied to real travel. It should be paid only for days the contractor is actually away from home on the assignment, and it should stay at or below the federal per diem rates for the work location. The U.S. General Services Administration publishes those rates each fiscal year; the FY2026 standard rate is $110 a night for lodging plus $68 a day for meals and incidental expenses, and many cities are higher. Anything paid above the federal rate is taxable wages.
The effect can be meaningful. The contractor keeps more each week after taxes, and the firm pays less in payroll taxes on the reimbursement. The client gets a contractor who feels fairly paid and is more likely to finish the assignment.
The mistake to avoid: wage recharacterization
Per diem can’t simply be carved out of pay the worker would have earned anyway. If a contractor would get the same total, say $2,400 a week, whether or not they travel, and the firm just relabels part of it as per diem, the IRS calls that wage recharacterization. In Revenue Ruling 2012-25, the IRS ruled that payments under an arrangement like that are all taxable wages, even if the worker really does have travel expenses.
In practice, that means local workers doing the same job shouldn’t receive the same total package split into “wages” and “per diem.” The taxable wage rate also has to meet minimum wage and overtime rules on its own. If the hourly rate is set artificially low to make room for per diem, you create wage-and-hour risk as well as tax risk.
The Recruiting and Retention Advantage
The staffing industry is more competitive than ever, especially in travel and project-based work. Recruiters often compete with several firms for the same contractor, and small differences in how pay is structured can decide whether a contractor accepts an assignment.
Two offers can look similar on paper, but if one firm runs a compliant staffing firm per diem program, the contractor’s weekly take-home pay can look very different. That changes the recruiting conversation. Instead of competing only on hourly wages, firms can compete on overall value and contractor experience, and contractors who take home more tend to stay loyal.
Because per diem must be tied to real expenses, it isn’t a way to cut a contractor’s pay. It’s a way to make sure a traveling contractor isn’t taxed on money that only covers the cost of being away from home. For firms working on tight staffing firm profit margins or hard-to-fill travel assignments, that advantage can be worth a lot.
Staffing Firm Per Diem Compliance Requirements
The benefits are real, but compliance is critical. Non-taxable per diem isn’t a shortcut or a loophole. To qualify as an accountable plan, the reimbursement arrangement must meet three IRS requirements:
- Business connection. The expenses must be incurred while performing services as an employee, and the per diem can’t be paid regardless of whether those expenses happen.
- Substantiation. The time, place and business purpose of the travel must be documented within a reasonable time. When per diem is paid at or below the federal rate, workers don’t have to keep every meal receipt, but you still need records of the dates and location of travel.
- Return of excess. Any amount paid beyond what was substantiated must be returned within a reasonable time, or treated as taxable wages.
Per diem applies to W-2 employees under an accountable plan. Independent contractors are taxed differently, so classification has to be right first; see our guide to W-2 vs 1099 staffing. Per diem paid outside these rules is taxable wages, and the unpaid withholding and employer taxes can come back as liabilities. Our post on staffing company payroll taxes explains why those obligations can become personal.
That’s why firms should never set up a per diem program casually. A qualified CPA, a labor and employment attorney and an experienced staffing payroll provider should all be involved in building and running it. The firms that benefit most usually already have strong payroll systems and clean recordkeeping in place.
Why More Staffing Firms Are Exploring This Strategy
As margins tighten across many sectors, staffing firms are looking for advantages that don’t rely only on raising bill rates. Compliant per diem is one of the few levers that can improve contractor satisfaction, strengthen recruiting and lower certain payroll-related costs at the same time.
For firms managing travel-heavy or project-based workforces, it can grow from a payroll tactic into part of the growth strategy. Healthcare staffing firms in particular rely on it; see travel nursing in 2026 for how per diem shapes the travel nurse market.
How Madison Resources Supports Staffing Firms With Traveling Workforces
Since 1992, Madison Resources has helped independent staffing firms run the payroll side of their business. Our payroll tax processing and back office services give firms with travel assignments the clean payroll records and tax filings a per diem program depends on. And because travel assignments often mean larger weekly payrolls before clients pay, payroll funding keeps your contractors paid on time while you wait on invoices.
Talk to our team about supporting your traveling workforce.
Final Thoughts
The staffing industry has always rewarded firms that understand the operational side of the business better than their competitors. The 50-mile rule is one of those areas where knowledge and careful execution create a real advantage.
Built correctly, a staffing firm per diem program can improve contractor experience, strengthen recruiting, protect assignment profitability and build long-term loyalty with traveling workers. Built carelessly, it can turn into a payroll tax problem. In an industry where margins, speed and retention all matter, getting it right pays off quickly.
This article is for general information and isn’t tax or legal advice. Speak with your CPA or attorney before setting up a per diem program.
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Frequently Asked Questions About Staffing Firm Per Diem
Below are answers to some of the most common questions about Staffing Firm Per Diem.
What is a Staffing Firm Per Diem Program?
A staffing firm per diem program reimburses W-2 contractors for lodging, meals and incidental expenses they incur while working a temporary assignment away from their tax home. When it’s run as an IRS accountable plan and stays at or below the federal per diem rates, those reimbursements aren’t taxable wages. Per diem is paid in addition to wages, only to workers who actually travel. It isn’t a way to relabel part of the pay a worker would earn anyway.
How Does Staffing Firm Per Diem Work?
The contractor is paid taxable wages for hours worked, plus a separate non-taxable per diem for each day they’re away from home on assignment. The per diem is based on the federal (GSA) rate for the work location, and the firm keeps records of the dates, location and business purpose of the travel. If the contractor stops traveling, the per diem stops. The taxable wage rate on its own still has to meet minimum wage and overtime rules.
What is the 50-Mile Rule for Staffing Firm Per Diem?
The 50-mile rule is an industry rule of thumb, not an IRS rule. Many staffing firms use 50 miles from a worker’s permanent home as a starting point for per diem eligibility, but distance alone doesn’t qualify anyone. Under IRS rules, the worker must keep a real tax home they continue to pay for, take an assignment expected to last one year or less, and need to stay overnight away from home because of the work.
Can Staffing Firm Per Diem Increase Contractor Take-Home Pay?
Yes. A traveling contractor who receives a compliant per diem doesn’t pay income tax, Social Security or Medicare on that reimbursement, so more of the money that covers their travel costs stays in their pocket. That can make a firm’s offer more attractive than one that pays the same total as fully taxable wages. The per diem has to reflect real travel expenses, though, not a reduction in the contractor’s hourly pay.
Which Industries Commonly Use Staffing Firm Per Diem Programs?
Per diem is most common where contractors travel for temporary or project-based work. Travel nursing and healthcare staffing are the largest users. Construction and industrial staffing use it for jobsites, plant shutdowns and remote projects. Engineering, disaster recovery and IT consulting firms use it when contractors are deployed to client locations in other cities or states.
Does Staffing Firm Per Diem Reduce Payroll Taxes?
Yes, on the per diem itself. Reimbursements paid under an accountable plan aren’t subject to the employer’s share of Social Security and Medicare, federal unemployment tax or state unemployment tax. The savings only hold if the program is compliant. If per diem is carved out of pay the worker would have received anyway, the IRS can treat the entire amount as wages, and the firm owes the taxes it didn’t withhold or pay, plus penalties.
Is Staffing Firm Per Diem IRS Compliant?
It can be, when it meets the IRS accountable plan rules: a business connection (the per diem is paid only because of real travel), substantiation (dates, location and purpose of travel are documented) and return of any excess. Rates must stay at or below federal per diem rates, the assignment must be temporary, and the worker must have a real tax home. Work with a CPA and an experienced staffing payroll provider before launching a program.
Why Are More Staffing Firms Using Staffing Firm Per Diem?
Competition for traveling talent keeps growing, and contractors compare offers by take-home pay. A compliant per diem program helps a firm recruit and keep travel contractors, and it lowers payroll taxes on the reimbursement portion, without raising bill rates. For healthcare, construction, engineering and IT staffing firms, it has become a standard part of a competitive travel offer.
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