"Per diem" is Latin for "per day," and at work it gets used for two completely different things — which is exactly why searching it is so confusing. One meaning is a daily allowance an employer pays to cover travel costs like hotels and meals (the IRS even publishes standard per diem rates for this). The other is a way of being employed: working as-needed, one shift at a time, instead of on a fixed schedule.
If you're looking at job listings and see "per diem," it's almost always the second meaning. That's the one this guide is about.
What a per diem job actually is
A per diem job is on-call, as-needed work. Instead of a set weekly schedule, you pick up individual shifts when the employer needs coverage — a nurse covering a busy weekend, a substitute teacher filling in, a banquet server working a one-off event. You're a real employee, not a contractor, but you have no guaranteed hours.
The model is most common in healthcare, where staffing needs swing day to day. Hospitals and clinics lean heavily on per diem nurses, respiratory therapists, and physical and occupational therapists to flex up when patient volume spikes. But per diem work shows up well beyond healthcare too — in education (substitute teachers), hospitality, warehousing and the skilled trades.
The defining trait is control cutting both ways. You decide which shifts to take and which to skip. The employer decides whether there are shifts to offer at all.
How per diem pay works
Here's the part that makes per diem appealing: the hourly rate is usually higher than what staff employees earn for the same work. The reason is a straight trade. Per diem workers typically give up health insurance, paid time off and a guaranteed schedule, and the higher wage is meant to compensate for it. As the career guidance at Indeed puts it, per diem staff often earn even more than part-time workers because they're covering shifts on short notice.
But a bigger number on your paycheck isn't the whole story. Because hours aren't guaranteed, your income can swing from week to week, and a higher rate spread over fewer (or canceled) shifts can leave you with less than a steady job would. Or, as one nurse staffing firm bluntly warns, higher pay doesn't necessarily mean a higher bottom line.
Per diem vs. PRN vs. part-time
These three terms get tangled constantly, so here's the clean version.
| Type | Schedule | Hours guaranteed? | Benefits? |
|---|---|---|---|
| Per diem | As-needed, shift by shift | No | Usually none |
| PRN | As-needed (Latin pro re nata, "as the situation arises") | Usually no | Usually none |
| Part-time | Set, reduced schedule | Yes (fewer than full-time) | Sometimes partial |
In healthcare, "PRN" and "per diem" are often used to mean the same thing — as-needed work with no set hours. The key contrast is with part-time: a part-time job is a smaller version of a regular job, with a predictable (if reduced) schedule and sometimes partial benefits. Per diem and PRN have no such guarantee — you work when you're called, and not when you aren't.
The pros and cons of per diem work
Per diem suits some people perfectly and frustrates others. The trade-offs are real on both sides.
The upsides
- Flexibility. You choose your shifts, which is why per diem nurses aren't bound by the same minimum-hours rules as staff, according to the American Nurses Association. It's a powerful fit for parents, students, semi-retirees and anyone juggling another job.
- Higher hourly pay. The rate premium is the headline benefit.
- Variety and lower burnout. Working across different units, sites or employers keeps the work fresh. Respiratory therapists writing for the AARC note that picking up per diem shifts lets you see your field practiced in several settings — and step away from the politics of any single workplace.
The downsides
- No guaranteed hours. If the employer doesn't need you, you don't work — and you don't get paid. Income can be unpredictable.
- First to be cut. When patient census drops or business slows, per diem shifts are usually the first canceled.
- Few or no benefits. No employer health insurance, retirement match or paid time off, in most cases. You're responsible for covering those yourself.
Who per diem work is best for
Per diem is less a lesser version of a "real" job than a different deal entirely: you trade security for control and a higher rate. For a nurse picking up weekend shifts around family life, a teacher subbing between other commitments, or a tradesperson smoothing out slow seasons, that trade can be exactly right.
If that sounds like you, the work is out there — healthcare especially runs on it. You can browse current openings on JobSnag, including per diem and as-needed roles across nursing, therapy and other fields.
Sources: American Nurses Association, "Per Diem Nursing: What Is It and How Does It Work?"; Indeed Career Guide, "PRN vs. Per Diem: A Definitive Guide"; American Association for Respiratory Care, "The Pros and Cons of Working Per Diem"; Investopedia, "What Does Per Diem Mean, and What Are Per Diem Rates?"
Per Diem Direct Support Professional — Nashua, NH
Frequently asked questions
How many hours can a per diem employee work?
There's no fixed cap — a per diem worker can pick up as many shifts as the employer offers and they're willing to take, sometimes approaching full-time hours in a busy stretch. The flip side is there's also no floor: a slow week can mean zero shifts. Some watchdogs warn that if an employer expects per diem staff to work near-full-time every week with no benefits, that's a red flag worth questioning.
Do per diem workers get benefits?
Usually not. The absence of benefits is the trade that funds the higher hourly rate. If benefits matter to you, check whether the employer offers anything to per diem staff before assuming — policies vary.
Is a per diem job worth it?
It depends on what you need from work. Per diem tends to be worth it if you value control over your schedule, want supplemental income on top of another job, or have benefits covered another way — through a spouse, a primary job or your own plan. It's a tougher fit if you depend on a steady, predictable paycheck.
