What Counts as Hours Worked? The Portal-to-Portal Act Explained

You clock in at 6:52 a.m. because your supervisor told you the shift starts at 7:00 and you need time to set up your workstation. You answer two work emails at 11:40 p.m. from bed. You spend 15 minutes putting on required safety gear before you punch in. Is any of that time you should be paid for?

The answer depends on the Portal-to-Portal Act of 1947, the federal law that determines what counts as hours worked. It was passed to fix a problem: in the 1940s, courts were ordering employers to pay for nearly everything employees did before and after their shifts, including walking from the parking lot to the work station. Congress stepped in to draw a line. That line still governs your paycheck today.

Here is what the law actually says, where the edge cases sit, and what you can do about it.

What the Portal-to-Portal Act of 1947 Changed

Before 1947, the Fair Labor Standards Act (FLSA) said businesses had to pay for all "work" time. Courts interpreted "work" broadly. If you had to walk across a factory floor to your station, that was work. If you changed into a uniform on-site, that was work. Companies faced massive class-action lawsuits for time they had never intended to pay for.

The Portal-to-Portal Act fixed that. It carved out two things from paid time:

  1. Walking and riding time to and from the actual place where the employee's principal task occurs.
  2. Tasks that are preliminary or postliminary to the principal task.

The law says those tasks are not covered by the FLSA unless a business agrees to pay for them or a union contract requires it. But the Act did not define exactly what counts as a "principal task." That created a new set of questions, many of which are still being litigated.

Which Work Tasks Trigger Pay Under the Portal-to-Portal Act?

Your principal task is the main duty you were hired to perform. For a warehouse worker, that is picking and packing orders. For a nurse, that is caring for patients. For a line cook, that is cooking food.

Everything you do before or after that principal task is either preliminary or postliminary, and generally not paid. But there is a catch: if a preliminary task is "integral and indispensable" to the principal task, it becomes paid time. That phrase, "integral and indispensable," is the hinge on which most of these cases turn.

The Supreme Court has said a task is integral and indispensable if it is "an intrinsic element of those activities" the employee is employed to perform and one the business "cannot reasonably expect" the employee to do without. That sounds technical because it is technical. The practical result: some pre-shift duties are paid, and some are not.

When Does the Portal-to-Portal Act Treat Travel as Paid Time?

The Portal-to-Portal Act explicitly excludes ordinary commuting. Traveling from your home to your workplace and back is not hours worked. This is true even if you drive 90 minutes each way, even if you stop at a job site that is farther than your normal office, and even if you listen to work-related podcasts while you drive.

There are exceptions, and they matter.

If you are a home health aide who visits multiple clients in one day, the time you spend driving from one client's home to the next counts as paid. That is not commuting; that is work time between assignments. Similarly, if you are a plumber who drives from the shop to the first job site and back to the shop when the workday ends, that travel time counts. The rule is simple: travel from home to a single workplace is commuting, but travel between worksites is work.

If you are required to travel to a remote job site that is far from your regular workplace, the time you spend traveling during normal work hours may also be paid. But the default is that getting to work is your problem, not your company's.

Does the Portal-to-Portal Act Require Pay for Donning and Doffing Gear?

Here is where the law gets genuinely complicated. The Portal-to-Portal Act specifically says that "changing clothes" is a preliminary or postliminary task that is not paid. But the FLSA's implementing regulations say that changing clothes can be paid if it is "an integral part of the principal activity."

The Supreme Court settled part of this in 2005 in IBP, Inc. v. Alvarez. The Court held that time spent putting on and taking off "required" safety gear is paid if the gear is integral and indispensable to the job. But time spent putting on and taking off "normal" clothing is not.

The key question: is the gear required by the organization, and does the job genuinely depend on it?

If you work in a meatpacking plant and must wear a chainmail apron, a hard hat, safety glasses, and steel-toed boots, those items are essential to your job. The time you spend putting them on and taking them off is paid. If you work in an office and merely need to change into a uniform shirt, that is likely not paid, unless the business requires you to change at work and the changing is essential to the job.

The rule of thumb: if the gear protects you from a hazard that is central to the job, it is probably paid. If the gear is just a uniform or clothing, it probably is not.

Security Screenings: The Amazon Warehouse Cases

One of the most contested areas in recent years has been the time employees spend going through security screenings at the end of their shifts. The question: is waiting in line to have your bag checked "hours worked"?

The Supreme Court answered this in 2014 in Integrity Staff Solutions, Inc. v. Busk, a case brought by Amazon warehouse workers. The workers argued that post-shift security screenings, which could take 20 minutes or more, were paid time because they were required by the company. The Court disagreed.

The Court held that the screenings were not "integral and indispensable" to the workers' principal tasks. The workers' job was retrieving and packing items, not going through security. The screenings were for the organization's benefit, but they were not an intrinsic part of the work the employees were hired to perform.

The result: employees do not need to be paid for time spent going through security screenings, even when those screenings are mandatory, as long as the screenings are not the employee's principal task. This has been a major victory for businesses and a major frustration for workers. If you are required to go through a screening that takes30 minutes, you are not paid for that time, unless a union agreement says otherwise.

Waiting Time and On-Call Time: When It's Hours Worked

Waiting time is paid if the waiting is "for the organization's benefit" and the employee is "engaged to wait." If you are waiting at your workstation for the next task, that is hours worked. If you are waiting at home for a phone call, that is generally not, unless the constraints on your time are so restrictive that you cannot use the time for your own purposes.

The test for on-call time comes down to freedom. Can you leave the premises? Can you run errands? Can you drink alcohol? If the answer to all three is yes, you are probably not working. If you must stay on the premises and cannot meaningfully use the time, that is hours worked.

For example, a nurse who must stay in the hospital break room during her on-call shift is working. She cannot leave, so the time counts. A plumber who carries a pager and can go to the movies while on call is not working, because he can use the time as his own.

When Does the Portal-to-Portal Act Require Pay for Training and Meetings?

Mandatory training and meetings are hours worked. If your company requires you to attend a safety briefing, a product training, or a staff meeting, that time is paid, even if it happens outside your normal shift.

The exception: training is not paid if it is "voluntary," occurs outside regular working hours, and is not directly related to the employee's job. For example, if you are a retail associate and you voluntarily attend a Saturday morning class on "Customer Service Excellence" that is not required for your job, that time is not paid. But if the class is required, or if it is directly related to your job, it is paid.

The same rule applies to "off-the-clock" work. If you are a cashier who is told to "finish up" after you punch out, that is paid time. If you are a manager who checks email after hours, that may be paid too, even if the organization did not ask you to do it.

The 'Integral and Indispensable' Standard

The phrase "integral and indispensable" is the single most important concept in Portal-to-Portal law. The Supreme Court has said it means a task that is "an intrinsic element of those activities" the employee is employed to perform and one the business "cannot reasonably expect" the employee to do without.

But the standard is not just about whether the task is necessary. It is about whether the task is so tied to the core work that it should be treated as part of the work itself. For example:

  • A knife sharpener in a butcher shop: the sharpening is essential to cutting meat, so the time is paid.
  • A cashier counting her drawer before a shift: the counting is essential to handling money, so the time is paid.
  • A warehouse worker walking from the time clock to the floor: the walking is not essential, so the time is not paid, unless the walk is unusually long and the business has a specific reason for the distance.

The standard is fact-specific. Two organizations in the same industry can have different results based on how they structure the work.

Modern Disputes: Remote Work Log-On Time, After-Hours Emails

The Portal-to-Portal Act was written in1947, long before anyone had a computer in their pocket. The law has not caught up with the way we work now.

For remote workers, the biggest question is: when does "log-on" time begin? If you start your computer at8:55 a.m. and wait for a video call to begin, is that paid? If you answer one email at11:30 p.m., is that a full hour of work?

The answer to the first question is probably no. Booting up a computer is the modern equivalent of walking to your desk, and the Portal-to-Portal Act does not require payment for that. But if your company requires you to be "online and available" at a specific time, and you must log in early to run a diagnostic or join a call, that time is likely paid.

The answer to the second question is: it depends on how long the email takes. If you spend30 seconds replying to "Got it, thanks," that is de minimis, a legal doctrine that says trival amounts of time do not need to be paid. But if you spend45 minutes writing a detailed report at11 p.m., that is hours worked, and your organization must pay you for it if they knew or should have known you were doing it.

The de minimis doctrine is not a fixed rule. The Supreme Court has said it applies when the time is "a matter of a few seconds or minutes" and the practical difficulty of recording the time is significant. But there is no bright line. Ten minutes is probably too long to ignore. Two minutes might be fine.

The practical advice for remote workers: track your time, and tell your company when you are working outside normal hours. If you send an email at11 p.m., your organization is on notice that you were working. They cannot avoid paying you by claiming they did not know.