Per diem employee rights explained for employers

Per diem employee rights cover two groups: employees who receive daily travel allowances and as-needed workers paid by the day. Both are protected by federal and state labor laws, even though no federal law requires you to offer per diem.

The obligations still add up. Unreimbursed travel costs can't push an employee's pay below the $7.25 federal minimum wage, and the FY 2027 standard GSA rate of $181 per day sets the baseline most employers use for tax-free allowances.

There’s no federal law requiring you to pay per diem. But you must still reimburse employees for legitimate travel expenses, whether through a per diem system or a traditional expense reimbursement program.

Confusion often arises when employees assume they’re entitled to per diem or when employers misunderstand the federal rules. Clarity about what you actually owe—and how best to structure reimbursements—can help you avoid compliance risks and frustrated travelers.

What per diem means for your workforce

Per diem is Latin for “by the day.” In business, it shows up in two different ways:

• Per diem payments: Daily allowances that cover travel-related expenses like meals, lodging, and incidentals
• Per diem employees: Temporary workers hired on an as-needed basis and paid a daily rate, without guaranteed hours

The two follow different rules. Travel allowances fall under IRS and GSA guidance, while per diem workers are protected by federal and state labor law.

Per diem payments vs. per diem employees

Per diem payments and per diem employment status are completely different concepts that happen to share a name.

Per diem payments are flat daily allowances your company provides to employees traveling for work. They cover meals, lodging, and incidental expenses. Employers aren't legally required to offer them.

Per diem employees, on the other hand, are workers you bring in on an as-needed basis. They don't have guaranteed schedules or hours. Think of nurses who pick up shifts at hospitals or substitute teachers who fill in when needed. Despite their variable schedules, these workers still have legal protections under federal and state labor laws.

Per diem workers carry their own wage, overtime, and benefits protections, separate from any travel allowance rules.

What does per diem cover?

Per diem allowances apply only to three categories of business expenses:

• Lodging (e.g., hotels or short-term rentals)
• Meals (e.g., breakfast, lunch, and dinner)
• Incidental expenses (e.g., tips, parking, laundry, and similar costs)

Meals and incidentals are grouped under the M&IE category. The General Services Administration (GSA) sets separate rates for lodging and M&IE. Airfare, car rentals, and other business travel expenses are not covered by per diem.

Per diem vs. expense reimbursement

Traditional reimbursement requires employees to save every receipt and submit detailed reports. Per diem flips this approach: employees receive a set daily allowance up front or as a fixed reimbursement, regardless of what they actually spend.

Per diem benefits both sides. Employers cut down on paperwork and avoid combing through stacks of receipts. Employees get faster reimbursements and know exactly how much they can spend each day. The approach also removes the awkward back-and-forth over whether a meal or hotel choice was "reasonable."

Per diem also gives employees more control. A traveler might choose a budget hotel and spend more on dinner, or opt for nicer accommodations and eat lighter meals. As long as they stay within daily limits and follow company policy, they decide how to use their allowance.

Who qualifies for per diem payments?

Employees traveling away from their tax home overnight for business purposes typically qualify for per diem payments. Your tax home is your regular place of work—not necessarily where you live.

Local travel doesn't qualify. If an employee leaves for a meeting across town and returns home the same day, per diem doesn't apply. The overnight requirement is the key threshold. The IRS uses it to distinguish routine commuting from genuine business travel that creates additional expenses for the employee.

Independent contractors generally don't receive per diem from clients, though they can deduct travel expenses on their own tax returns. If you're unsure whether a worker qualifies, look at whether the trip takes them away from their primary work location overnight and serves a clear business purpose.

Two IRS Publication 463 rules also affect who qualifies:

• Temporary vs. indefinite assignments: An assignment expected to last 1 year or less counts as temporary travel, so per diem can stay tax-free. An assignment expected to last longer is indefinite, which ends tax-free per diem.
• Itinerant workers: Employees with no regular place of business or permanent home have no tax home, so they can't receive tax-free per diem. This matters for traveling crews and staffing assignments.

Legal requirements and per diem employee rights

Per diem workers and employees who receive per diem allowances both have protections under federal and state labor laws. Workers are owed at least minimum wage and overtime, and allowance recipients are owed reimbursement for required business expenses that would otherwise cut into that pay.

Federal law doesn’t require employers to provide per diem allowances. However, you must reimburse employees for legitimate business travel expenses. Under the Fair Labor Standards Act (FLSA), unreimbursed expenses can’t reduce an employee’s effective hourly wage below the federal minimum of $7.25 per hour. Ignoring reimbursements can also create overtime compliance issues if expenses push net pay below wage thresholds.

The FLSA also requires wages to be paid "free and clear," meaning finally and unconditionally. If employees absorb required business expenses that cut into their minimum wage or overtime pay, federal regulations treat that as a kickback to the employer.

Clear reimbursement policies—whether through per diem, traditional expense reporting, or a hybrid system—help you avoid wage disputes while keeping employees financially whole. This is general guidance, not legal advice, so confirm your state's rules with employment counsel.

Federal vs. state requirements

Federal guidelines focus mostly on tax compliance and leave the choice of reimbursement method up to employers. But state laws can be stricter. For example, California requires employers to reimburse all necessary business expenses, and Illinois requires reimbursement of necessary expenditures employees incur within the scope of their employment. Other states have looser or more specific reimbursement requirements.

That patchwork creates challenges for multi-state employers. What works in Texas, for instance, might not meet California’s higher standard for protecting employee reimbursement rights.

Documentation requirements

Per diem simplifies reimbursement, but it doesn’t remove reporting obligations. Employees must still submit expense reports documenting the time, place, and business purpose of each trip. The IRS treats an expense report submitted within 60 days of the expense as a reasonable timeframe under its fixed date method.

Under a per diem allowance at or below the federal rate, the IRS treats the amount as substantiated, so employees only need to document time, place, and business purpose. Receipts for lodging and for any expense of $75 or more apply when you reimburse actual costs instead. Using GSA rates also gives you added flexibility, since IRS rules provide built-in compliance when those rates are followed.

Rights of per diem employees

Per diem workers, such as on-call nurses or substitute teachers, are employees with the same core federal protections as anyone else on your payroll. A variable schedule doesn't remove them.

Don’t confuse travel per diem allowances with per diem employees, who are temporary staff paid a daily rate. These workers are still covered by FLSA wage and overtime rules, and these protections matter most when you set daily rates and schedules for as-needed staff.

Minimum wage and overtime

Non-exempt per diem workers must earn at least the federal minimum wage of $7.25 per hour, or a higher state rate, for all hours worked. They're also owed overtime at 1.5 times their regular rate for hours past 40 in a workweek.

For example, say a per diem nurse paid a flat daily rate works 48 hours in a week. You owe overtime on 8 of those hours:

Overtime hours = Hours worked in the workweek – 40

Overtime hours = 48 – 40 = 8

Travel allowances follow a separate rule. Under 29 CFR 778.217, a per diem that reasonably approximates travel costs, such as amounts at or below federal rates, generally stays out of the overtime regular rate. Amounts that vary with hours worked count as wages.

Benefits eligibility and worker classification

The "per diem" label doesn't change how the law treats a worker's benefits or status. Three rules apply:

• ACA full-time status: Per diem employees who average 30 or more hours per week, or 130 hours per month, count as full-time for an applicable large employer's health coverage obligations.
• Worker classification: Per diem workers are generally employees, not independent contractors. The DOL's economic-reality test decides classification, not the job title.
• Paid sick leave: State paid sick leave laws may also cover per diem staff, so check the rules in each state where they work.

Understanding GSA per diem rates for FY 2027

The General Services Administration (GSA) sets annual per diem rates for lodging and meals & incidental expenses (M&IE). For FY 2027 (Oct. 1, 2026–Sept. 30, 2027), the standard CONUS rate is $181 per day: $113 for lodging and $68 for M&IE, up from $178 in FY 2026, when GSA froze rates at FY 2025 levels.

M&IE tiers for non-standard areas (NSAs) still range from $68 to $92 in FY 2027.

Location plays a big role. GSA lists 295 non-standard areas with rates above the standard for FY 2027. Private employers aren't required to use GSA rates, but allowances at or below them stay tax-free under an accountable plan.

How to find your location's per diem rate

The GSA’s lookup tool lets you search rates by city, state, or ZIP code. Rates are set by county or city and follow the federal fiscal year (October through September). Standard areas default to the $181 CONUS rate, while NSAs receive customized allowances based on local data.

Major metros, tourist destinations, and remote areas with limited lodging often fall into the NSA category. For travel outside the continental U.S., the Department of Defense sets rates for Alaska, Hawaii, and U.S. territories, and the State Department sets rates for foreign countries.

First and last day travel rules

Federal guidelines apply a 75% rule on the first and last travel days. Employees receive three-quarters of the full M&IE rate for partial travel days, since most travelers eat fewer meals at departure and return.

For example, if the M&IE rate is $68, the first and last days are reimbursed at $51 each. On a 3-day trip, the total M&IE reimbursement would be:

Total M&IE = $51 + $68 + $51 = $170

This calculation applies regardless of your actual meal schedule or expenses. The reduced rate acknowledges that most travelers don't need full meal allowances when they're only away from home for part of the day.

Extra allowance for actual expenses

In limited cases where actual costs far exceed published rates, agencies can approve reimbursements up to 300% of the standard per diem rate. This exception applies only with proper documentation and approval.

The IRS high-low method

The IRS high-low method skips the locality-by-locality lookup. Instead, you apply one flat per diem rate for travel to IRS-designated high-cost localities and a second rate for everywhere else in CONUS. For travel on or after Oct. 1, 2026, IRS Notice 2026-60 sets the high-low rates at $329 per day for high-cost localities and $230 for everywhere else in CONUS. The IRS publishes new rates each year.

Employers choose it for simpler administration. If your teams travel often, tracking two rates is far easier than tracking nearly 300 local ones. Allowances at or below the high-low rates are still treated as substantiated under IRS per diem rules, so they stay tax-free under an accountable plan.

Tax implications of per diem payments

Per diem payments are treated differently depending on how your reimbursement plan is structured. The IRS divides them into two categories: accountable plans and non-accountable plans.

Under an accountable plan, per diem reimbursements that follow IRS rules stay tax-free for employees and remain deductible for the employer. A non-accountable plan skips those requirements, meaning the payments count as taxable wages, subject to payroll taxes and income tax withholding.

When per diem becomes taxable income

Per diem is tax-free only if certain conditions are met. It becomes taxable when:

• You pay more than the federal per diem rate—the excess is treated as wages and must be reported on the employee’s W-2.
• Employees don’t provide proper documentation for expenses.
• Expense reports are filed late or beyond a reasonable timeframe.
• Employees fail to return unused advance funds.

IRS accountable plan requirements

According to IRS Publication 15, a per diem policy qualifies as an accountable plan if:

• Business connection: Payments must cover legitimate work-related expenses, not serve as disguised wages.
• Substantiation: Employees must document the time, place, and business purpose of each expense.
• Return of excess: Employees must return any unused advance funds within a reasonable timeframe.

If these requirements aren’t met, the entire payment is treated as taxable income under a non-accountable plan.

Implementation best practices for employers

You can set up per diem programs as either advance payments or post-trip reimbursements. Each approach has tradeoffs. Advances prevent employees from covering expenses out of pocket, but they require tracking and potential refunds. Reimbursements give employers tighter expense control, but they place the initial financial burden on travelers.

Think about your company’s cash flow, how often your teams travel, and your admin bandwidth. Advances usually work best for frequent or predictable trips. Reimbursements fit better for occasional or variable travel.

Setting up your per diem policy

A clear travel and expense policy keeps your program fair, compliant, and easy to follow. Make sure to cover:

• Consistent application: Apply the same rules across departments and employee levels.
• GSA rate standards: Use federal per diem rates as a defensible baseline.
• Automated processing: Rely on expense software to reduce errors and speed approvals.
• Documentation rules: Spell out what reports, receipts, and timelines employees must follow.

Common mistakes to avoid

Several implementation pitfalls can create tax issues and administrative headaches for your per diem program:

• Disguised wages: Don’t use per diem to pay regular compensation. The IRS treats this as taxable income.
• Weak recordkeeping: Missing or incomplete documentation turns tax-free reimbursements into taxable wages.
• Policy extremes: Avoid rules that are too complex (which discourage compliance) or too loose (which invite abuse).

Preventing these common errors protects your company from tax penalties and keeps your per diem program running smoothly.

Keep employees whole with faster, policy-checked reimbursements

Your legal duty as an employer comes down to two things: keep employees financially whole and stay inside IRS accountable plan rules. Slow reimbursements and manual policy checks put both at risk.

With Ramp Expense Management, you can pay reimbursements to employee bank accounts in 1–2 business days. Your travelers don't have to float business costs on their own cards while they wait.

Policy Agent gives you an always-on AI reviewer trained on your real expense policy. It reviews 100% of expenses and surfaces only genuine exceptions, so the same rules apply across every department. It also catches 7x more out-of-policy spend than traditional rule-based flags.

You don't have to chase paperwork, either. Let Ramp capture receipts, fill memos, and approve in real time, so employees spend less time on documentation and your team spends less time following up.

More than 85,000 businesses use Ramp and save an average of 7.5% a year across all spending.

Try an interactive demo to see how Ramp keeps reimbursements fast and policy-checked.