What Is Per Diem Work?
Per diem comes from the Latin phrase meaning "per day". In employment, per diem work refers to an arrangement where workers are not given a fixed schedule. Instead, an employer contacts them when there is a gap to fill, the worker decides whether to accept the shift, and payment covers only the days or hours actually worked.
There are no guaranteed hours, and per diem arrangements typically come with no employer-provided benefits. The term is sometimes confused with travel per diem, which is a daily allowance given to employees who travel for work to cover lodging, meals, and incidental expenses. These are two entirely separate concepts.
A per diem worker is a type of job arrangement. A travel per diem allowance is an expense reimbursement that any employee, regardless of their employment type, might receive when they travel. This article focuses on per diem work as an employment and staffing model.
How Per Diem Work Works
Per diem work has several defining characteristics that separate it from other employment types. These apply whether you are the worker or the business doing the hiring.
Per Diem Workers Are Scheduled As Needed
Per diem workers are not on a fixed rota. When a business has an unexpected gap, such as a technician calling out or a project that suddenly needs more hands, they contact a per diem worker to check availability. The worker can accept or decline.
A per diem electrician might get a message on Monday morning asking whether they are available for a two-day commercial job starting Wednesday.
If they are, they show up, work the days, and get paid. If not, the employer moves on to the next person on their list. This on-demand structure is the core feature that distinguishes per diem from any other type of employment.
Pay Is Usually Higher, but Benefits Are Often Limited
Per diem workers do not receive employer-sponsored health insurance, paid time off, or retirement plan contributions; employers typically compensate with a higher hourly or daily rate than they would pay a comparable full-time employee.
A per diem HVAC technician earning $42 per hour might find that a similar full-time position pays $30 per hour but includes health coverage worth several thousand dollars per year and two weeks of paid leave.
The financial calculus depends on how much you value income predictability and benefits against a higher immediate rate and how consistently you can fill your calendar with per diem work.
Hours Can Change Week to Week
There is no guaranteed minimum number of hours or days in a per diem arrangement. In a busy period, a per diem worker might put in five full days in a single week. In a slow patch, they may receive no calls at all.
This variability makes per diem work less suitable as a sole income source for workers who rely on predictable earnings to cover fixed expenses.
For those who use it to supplement another job, who work across multiple industries, or who have savings to bridge quiet periods, the variability is an acceptable trade-off for the flexibility it provides.
Workers Usually Have More Flexibility Over When They Work
One of the main reasons workers choose per diem arrangements is the ability to control when they are available. A field service technician who also runs their own landscaping business might prefer per diem construction work because they can accept shifts when their landscaping calendar is light and turn them down when it is full.
This scheduling control is appealing to workers with caregiving responsibilities, second businesses, or seasonal income from another trade.
The trade-off is that employers may prioritise per diem workers who are reliably available, so workers who frequently decline shifts may find themselves contacted less often.
Employers Use Per Diem Staff to Fill Gaps Fast
For businesses, per diem workers provide a way to respond to sudden staffing needs without the time and cost of formal recruitment. When a project overruns, when a key crew member is absent, or when a client request creates unexpected demand, a maintained per diem roster gives managers a pool of trained workers to call on quickly.
Knowing how many per diem workers to call in the next morning is easier when you have clear data from the day before. Using clock-out questions at the end of each shift, managers can capture what was completed, what's still outstanding, and what staffing the next day will require, turning end-of-shift information into next-day scheduling decisions before the morning rush begins.
Want to learn more on clock-out questions in Clockshark? Check out this guide to clock-out questions for construction and field service teams
Per Diem Work vs Other Types of Employment
Comparing per diem work with other employment categories helps clarify where it sits and which situations it suits best.
Employment Type | Schedule | Benefits | Pay Rate | Commitment |
Per Diem | As needed, no fixed rota | Typically none | Higher day/hourly rate | None |
Part-Time | Fixed, fewer hours | Sometimes partial | Standard rate | Ongoing |
Temp / Contract | Defined assignment term | Rare | Varies by role | For the contract period |
Full-Time | Fixed, full hours | Full package | Standard rate | Ongoing |
The differences in the table above also affect taxes and legal status. Full-time and part-time employees have taxes withheld by the employer, whereas per diem workers are often treated as independent contractors who manage their own tax obligations.
For construction businesses in particular, getting this classification right matters: misclassifying a worker as a contractor when they should be an employee can trigger back taxes, penalties, and liability issues down the line. It's worth running any borderline cases past an accountant or checking IRS guidance before adding someone to your per diem roster.
Common Jobs and Industries That Use Per Diem Work
Per diem work is most prevalent in industries where staffing demand fluctuates, and skilled workers can be deployed on short notice. Construction and field service companies use per diem tradespeople to cover project spikes and unexpected absences.
Healthcare relies on per diem nurses and support staff to maintain coverage across shifts without overstaffing during quieter periods. Education calls in per diem substitute teachers. Hospitality uses per diem event staff for large bookings and seasonal peaks.
According to the US Bureau of Labor Statistics, contingent and alternative work arrangements are a significant and growing part of the US labor market, particularly in skilled trades and field services.
For trade businesses tracking mixed workforces, time and scheduling software built for variable-hour workers makes payroll and project costing considerably more manageable.
Managing Per Diem Workers with the Right Tools
When managing a mixed workforce that includes per diem staff, accurate time tracking becomes critical. The flexibility that makes per diem work attractive also creates scheduling complexity that manual systems struggle to handle, and that complexity adds up quickly in time spent chasing timesheets and correcting payroll. A mobile time clock app that workers can use from any job site removes a lot of that friction straight away, since per diem crews are rarely clocking in from the same place twice.
Tri-Quest Group, an electrical, plumbing, and HVAC company in Nova Scotia, saw exactly that problem before switching to ClockShark, and now saves roughly 5 hours per week and $600 each month. Office Manager Tracey MacKenzie says the change was immediate: "Since they have to log into ClockShark now, there's no confusion for the employees or me. No more wasted time. Phewwww!"
Beyond payroll savings, knowing who's working now and where they are lets managers deploy per diem workers far more efficiently. When a service call comes in, Tracey can instantly see who's available and closest to the job site, exactly the kind of visibility a per diem-heavy workforce needs to function smoothly. Pair that with payroll integrations that push approved hours straight through to your payroll provider, and most of the manual back-and-forth that comes with variable-hour teams disappears. It's the kind of setup that's particularly well-suited to construction and trade businesses, where job sites change daily and crews are spread across multiple locations.
Looking at ExakTime alternatives? Check out our side-by-side comparison guide to see how ClockShark stacks up for mobile-first, variable-hour teams.
Is Per Diem Work Right for You?
Per diem work isn't the right fit for every business or every worker, but for the situations it does suit, it's hard to beat for flexibility.
For business owners, it makes the most sense when your staffing demand swings unpredictably. If you regularly face last-minute absences, project surges, or seasonal spikes, building a reliable per diem roster gives you a way to scale up without carrying the cost of full-time headcount through the quiet periods. It works less well if your workload is steady and predictable, in which case a full-time hire usually offers better continuity for the same overall spend.
For workers, per diem suits people who value control over their schedule more than they value income predictability. It's a strong fit if you're balancing per diem shifts with another business, caregiving responsibilities, or seasonal work in another trade. It's a tougher fit if you rely on a steady paycheck to cover fixed monthly expenses, since quiet weeks can stretch longer than you'd like.
The simplest test is to ask whether the trade-off, higher hourly pay and flexibility in exchange for no guaranteed hours and no benefits, lines up with your situation. If it does, per diem can be one of the most efficient working arrangements on either side of the relationship.
Ready to make managing a per diem workforce simpler? Try ClockShark free for 14 days and see how mobile-first time tracking and scheduling can take the guesswork out of variable-hour teams. Start your free trial, no credit card required.
Frequently Asked Questions About Per Diem Work?
Is a per diem job the same as part-time work?
No. Part-time work typically comes with a regular, predictable schedule and sometimes includes partial benefits such as health coverage or paid leave. Per diem work has no guaranteed schedule: workers are contacted when there is a need and are free to accept or decline.
While both part-time and per diem workers may log fewer hours than a full-time employee, the structure and predictability of the arrangements are fundamentally different. Part-time workers know when they are working next week; per diem workers do not.
Can you work per diem for multiple employers?
Yes. Because per diem workers have no schedule commitment to a single employer, many work with several businesses at the same time, accepting shifts based on their availability.
This is common in skilled trades, nursing, and event staffing. Workers who manage multiple per diem relationships typically keep their own availability records to avoid conflicts, particularly if they are registered with several companies in the same trade area.
Do per diem workers have to accept every shift offered?
Not typically. Per diem workers are generally free to decline shifts, and most employers understand that availability will change week to week. That said, consistently turning down shifts may result in an employer contacting that worker less often or removing them from their active per diem roster.
Workers who want to stay in regular rotation need to accept shifts at a reasonable rate to remain a reliable option that the employer will call first.
How is per diem work different from travel per diem?
These are two separate concepts that share the same Latin phrase. Per diem work is an employment arrangement: workers are hired on an as-needed, day-by-day basis, called in when there is demand, and paid for the shifts they work with no guaranteed schedule.
Travel per diem is an expense reimbursement: a daily allowance paid to any employee who travels for work to cover costs such as meals, lodging, and transport. A salaried full-time employee attending a conference in another state may receive a travel per diem allowance without being a per diem worker in any sense.
