Under the continuous workday rule, once you begin your first required work task, the pay clock runs without interruption until you finish your last one, with only narrow carve-outs for genuine meal breaks and a short list of activities that fall outside the workday entirely. The rule comes from the Portal-to-Portal Act of 1947 and the Department of Labor regulations that interpret it, and it is the reason employers cannot split a single shift into scattered paid segments with unpaid gaps in between.1eCFR. 29 CFR Part 790 – Provisions Relating to Certain Activities Engaged in by Employees
The logic is control. During that span, you can’t leave, you can’t take another job, and you’re available for whatever the employer needs next. That availability has value, and federal law says it must be paid.
What Starts and Stops the Pay Clock
The clock starts when you begin a “principal activity,” which the Supreme Court has defined as any task that is integral and indispensable to the work you were hired to do.2Justia. Steiner v. Mitchell, 350 U.S. 247 (1956) A lab technician calibrating equipment before running tests, a nurse reviewing charts before rounds, a warehouse worker booting up a scanner before picking orders — each of those tasks launches the compensable day. For remote workers, logging into required systems or timekeeping software generally does the same thing, because you cannot perform the job without it.
The Supreme Court later confirmed that once the first principal activity is underway, walking time and other in-between time up through the last principal activity is part of the continuous workday and must be paid.3Cornell Law School. IBP, Inc. v. Alvarez
Not everything you do at work triggers the clock, though. The Portal-to-Portal Act separates principal activities from “preliminary” and “postliminary” ones — things you do before or after your real work that aren’t closely tied to your duties.4Office of the Law Revision Counsel. 29 USC Ch. 9 – Portal-to-Portal Pay Walking in from the parking lot, swiping a badge at the turnstile, or hanging up your coat sits on the unpaid side of that line.
Context decides close cases. Federal regulations warn that no blanket list of preliminary or postliminary tasks exists, because the same activity can shift categories depending on the job.5eCFR. 29 CFR 790.7 – Preliminary and Postliminary Activities Washing your hands after a desk job is personal. Washing chemical residue off after handling hazardous materials is integral, so it’s paid.
What Stays on the Clock Once the Day Is Running
Most time between assignments stays paid. If you finish one task and wait for the next, that’s paid time. If a machine has to reset before you can continue, that’s paid time. Federal regulations go further: even work the employer didn’t specifically ask for must be paid if the employer knew or had reason to know you were doing it.6eCFR. 29 CFR 785.11 – General Staying late to fix errors counts, whether or not anyone told you to.
Short rest breaks are compensable. Breaks of roughly 5 to 20 minutes count as working time and do not pause the continuous workday, so employers who automatically deduct 10- or 15-minute breaks from payroll are violating federal law.7U.S. Department of Labor. Fact Sheet #22: Hours Worked Under the Fair Labor Standards Act (FLSA) Coffee and snack breaks fall into this category.
Waiting and On-Call Time
The distinction is between being “engaged to wait” and “waiting to be engaged.” The first is paid; the second often isn’t.8eCFR. 29 CFR 785.16 – Off Duty A truck driver sitting at a loading dock while cargo is loaded is engaged to wait. A driver who arrives in another city at noon and is completely released from duty until a 6 p.m. return has genuinely off-duty time. The questions are whether you were told in advance you were relieved, whether you know when you have to be back, and whether the gap is long enough to actually use. If your employer keeps you nearby, requires you to respond within minutes, or expects you to stay on the phone, that time is looking like work.
Travel Between Job Sites
Your regular commute isn’t paid, but travel between locations during the workday is.9eCFR. 29 CFR 785.38 – Travel That Is All in the Day’s Work If you’re sent to a meeting spot to pick up tools or get instructions before heading to the job, the drive from that meeting spot to the job site is paid. The regulation’s own example: if you normally quit at 5 p.m. but are sent to another job that runs until 8 p.m., and you’re then required to return to the employer’s premises, arriving at 9 p.m., all of that time through 9 p.m. is working time. If instead you drive straight home from the 8 p.m. site, the trip home is a normal commute and isn’t paid.
What Comes Out of the Clock
Genuine meal breaks are the main carve-out inside the workday. To qualify as unpaid, you must be completely relieved from all duties, active and passive. Thirty minutes is normally long enough; shorter breaks can qualify only in special circumstances.10eCFR. 29 CFR 785.19 – Meal The employer doesn’t have to let you leave the premises, but it does have to actually let you stop working.
This is where employers get caught. An office worker required to eat at the desk in case a call comes in, or a factory worker who has to stay at the machine during lunch, is working while eating. Even passive duties like monitoring a phone line disqualify the break, and the whole period has to be paid.
Post-shift security screenings are also outside the workday, at least under federal law. The Supreme Court held that mandatory bag checks and metal-detector screenings at a warehouse — which could take up to 25 minutes — were not compensable because they weren’t intrinsic to the actual warehouse work.11Justia. Integrity Staffing Solutions, Inc. v. Busk, 574 U.S. 27 (2014) The employer could have dropped the screenings entirely without affecting anyone’s ability to do their job, and that was enough. This is where many workers’ intuition clashes with the law: the fact that your employer requires something does not automatically make it paid.
The De Minimis Exception
A narrow exception covers truly trivial amounts of time. The Supreme Court has said “split-second absurdities” aren’t what the FLSA was built to catch, but tasks requiring “a substantial measure of time and effort” are always compensable.12Legal Information Institute. Anderson v. Mt. Clemens Pottery Co., 328 U.S. 680 (1946) Courts look at how hard the time is to record, how much accumulates, and how often the extra work happens. A one-time 90-second task that’s nearly impossible to log might be de minimis. The same 90 seconds every shift, five days a week, isn’t. Regularity sinks most employer de minimis defenses.
Donning and Doffing: The Most-Litigated Edge
Putting on and taking off specialized gear is one of the sharpest fights inside this rule. When the job requires unique protective equipment — Kevlar gloves, chemical suits, steel-toed boots — that can only be put on at the worksite, that time is usually a principal activity. It starts the workday on the front end and extends it on the back end. The more specialized the gear and the more effort required, the stronger the case for pay.
There is a union-shop exception. Federal law allows time spent changing clothes or washing up at the start or end of the day to be excluded from paid hours if a collective bargaining agreement specifically excludes it, or if a longstanding custom under that agreement treats it as unpaid.13Office of the Law Revision Counsel. 29 USC 203 – Definitions
How This Feeds Overtime
Every hour that counts as compensable time under the continuous workday rule counts toward the 40-hour weekly threshold for overtime. The FLSA requires at least one and a half times your regular rate for every hour past 40 in a workweek.14U.S. Department of Labor. Overtime Pay Fifteen unpaid minutes of pre-shift setup, a 20-minute unpaid drive between job sites, rest breaks silently deducted from your timecard — those hours push you toward and past 40.
Employers cannot average hours across two or more weeks to sidestep overtime. The calculation runs on a fixed, recurring 168-hour workweek. If your real compensable time last week was 43 hours instead of the 40 your employer wrote down, you’re owed three hours of overtime plus potentially liquidated damages.
If Your Employer Isn’t Paying Continuous Workday Time
You have two years from the date of the violation to file a federal wage claim. If the violation was willful, meaning the employer knew it was breaking the law or acted with reckless disregard, that stretches to three years.15Office of the Law Revision Counsel. 29 USC 255 – Statute of Limitations These deadlines are strict. Many states give you longer under their own wage laws, so check your state even if the federal window has closed.
To file a federal complaint, contact the Department of Labor’s Wage and Hour Division at 1-866-487-9243 or through the agency’s online complaint portal.16U.S. Department of Labor. How to File a Complaint Complaints are confidential: the agency will not disclose your name, the nature of the complaint, or whether a complaint exists at all. Federal law also bars your employer from retaliating against you for filing or cooperating with an investigation.
One point that helps workers: employers are required to keep accurate hours records, and when they don’t, the burden shifts. Courts allow you to present reasonable estimates of the time you worked, and the employer then has to disprove them. Poor recordkeeping is how many employers lose these cases.
The exposure for employers is significant. The baseline remedy is back pay, and the FLSA adds liquidated damages in an equal amount, which effectively doubles the bill. Repeated or willful violations carry civil penalties of up to $2,515 per violation.17U.S. Department of Labor. Civil Money Penalty Inflation Adjustments Willful violations can also draw criminal prosecution: a first offense can bring a fine of up to $10,000, and a second conviction can result in up to six months in prison.18Office of the Law Revision Counsel. 29 USC Ch. 8 – Fair Labor Standards – Section 216