No federal law says how many hours is part time. The Fair Labor Standards Act defines neither part time nor full time and leaves the call to the employer. In practice, under 35 hours a week is the usual statistical line, and under 30 is the line that matters for health coverage.
So the honest answer depends on who is asking. Someone working 30 to 34 hours can be part time on one government chart and full time under another law, on the same schedule. If you run payroll, that gap is the part worth understanding.
Who decides, and what each number controls
Each of these rules answers a different question. None of them is a general definition, and none overrides your handbook for things like paid time off:
| Who decides | The number | What it controls |
|---|---|---|
| Fair Labor Standards Act | No number | Defines neither term. Minimum wage and overtime apply either way. |
| Bureau of Labor Statistics | Full time at 35 or more hours a week | Only how government job figures are counted. It binds no employer. |
| Affordable Care Act | Full time at an average of 30 hours a week, or 130 a month | Who a large employer, with 50 or more full-time employees and equivalents, must offer coverage to or risk a payment. |
| Family and Medical Leave Act | 1,250 hours in the last 12 months | Who can take protected leave, along with 12 months on the job and 50 employees within 75 miles. |
| 401(k) and ERISA 403(b) plans | 1,000 hours in a year, or 500 in each of two straight years | When someone aged 21 or over must be allowed to contribute, if you have a plan. |
| Your employer | Whatever the handbook says | Paid time off, benefits and schedules, within the rules above. |
The 30-hour figure comes from the IRS page on identifying full-time employees, which also allows 130 hours in a month. The 35-hour line is from the Bureau of Labor Statistics and only affects how surveys count workers.
The yearly rules, turned into a normal work week
Leave and retirement rules count hours per year, which makes them hard to compare with a schedule. Divide by 52 weeks and they line up. An employee on a steady 24 or 25 hours a week is already near the FMLA test, well below what most people would call full time:
That is the surprise in this chart. A part-time label says nothing about several legal rights, which switch on well below full-time hours. Retirement plan access starts near 10 hours and leave protection near 24, provided the plan exists and the employer is covered.
Same restaurant group, six schedules, different answers
Here are six people at one invented restaurant group, tested against each rule. Read across the line cook’s row: part time by the survey definition, full time for health coverage, and eligible on hours for protected leave.
| Role | Hours a week | Hours a year | BLS | ACA | FMLA hours | 401(k) entry | Weekly overtime hours |
|---|---|---|---|---|---|---|---|
| Weekend host | 8 | 416 | Part | Part | No | No | None |
| Prep cook | 22 | 1,144 | Part | Part | No | Yes | None |
| Server | 26 | 1,352 | Part | Part | Yes | Yes | None |
| Line cook | 32 | 1,664 | Part | Full | Yes | Yes | None |
| Shift lead | 38 | 1,976 | Full | Full | Yes | Yes | None |
| Kitchen manager | 44 | 2,288 | Full | Full | Yes | Yes | 4 |
Notice the prep cook. At 22 hours a week, that job misses the FMLA hours test but clears the regular 1,000-hour retirement plan rule. The server, four hours a week more, clears both. Small schedule changes move people across these lines, so track the hours actually worked, not the hours in the offer letter.
The weekend host shows the long-term rule from the other side. Eight hours a week falls short.
A worker aged 21 or over reaching 500 hours in each of two consecutive 12-month periods must be allowed to make their own contributions to a 401(k), according to IRS Notice 2024-73. Check your plan document, since many plans are more generous.
Is 20, 32 or 40 hours a week part time?
20 hours
Part time under every definition here. Held all year, it also comes to more than 1,000 hours, so a retirement plan with a one-year rule has to let that person in, assuming they meet the age test.
32 hours
This is the one that catches employers out. It counts as part time for the BLS and in many handbooks, but it is full time under the Affordable Care Act. A large employer that labels the job part time can still owe a payment if it offers no coverage.
40 hours
Full time by any common measure. A job with a steady 40 hours rarely fits a part-time label, and no federal rule treats it as one. Anything past 40 in a workweek earns nonexempt employees overtime, whatever the job title says.
How many days is part time?
No rule counts days. The tests above all use hours, so three long shifts and five short ones are judged the same way. By the month, the only federal marker is the ACA’s 130 hours.
Setting your own line as an employer
You get to choose, so write it down. A short handbook line such as “full time means a regular schedule of 35 or more hours a week” settles who earns paid time off and benefits. Your number can sit anywhere, but it does not move the ACA line of 30.
Then find out whether the ACA applies at all. It reaches employers with 50 or more full-time employees, including full-time equivalents, and part-timers count toward that. Add each part-timer’s hours for the month, capping each at 120, then divide by 120:
| Group | Hours counted each | Total hours |
|---|---|---|
| 10 part-timers at 60 hours a month | 60 | 600 |
| 6 part-timers at 100 hours a month | 100 | 600 |
| 2 part-timers at 125 hours a month | 120 (capped) | 240 |
| Part-time hours, divided by 120 | 1,440 / 120 = 12 equivalents | |
| Add 41 full-time employees | 53: a large employer | |
This group has only 41 people on full-time schedules, yet it is over the line. The reverse also holds: below 50, the employer payment rules do not apply however you label anyone. Related companies are generally counted together, and the test uses the prior year’s monthly average, so run it across all twelve months.
FMLA has its own size test. Private employers are covered at 50 or more employees in 20 or more workweeks, and an employee also needs 50 employees within 75 miles, according to DOL Fact Sheet 28. Some states run their own leave and scheduling laws with lower limits, so check yours.
What part-time status does not change
The Department of Labor is blunt about this: being full time or part time does not change how the FLSA applies. Minimum wage is owed for every hour, and a nonexempt part-timer who picks up extra shifts past 40 hours gets overtime. Our overtime guide shows the calculation.
Payroll tax is the same too. A part-timer pays the same 7.65% for FICA, fills out a W-4, gets a W-2 and should get a clear record of each paycheck. Our pay stub generator handles a short week as easily as a long one, and how to do payroll covers the rest.
One label does change everything: employee or contractor. Hours do not decide that, since a contractor working 50 hours a week is still not an employee if the working relationship fits. See W-2 vs 1099 before you use either form.
Sources: the Department of Labor’s FLSA Advisor and FMLA fact sheet, the BLS definitions, the IRS pages on full-time employees and large employers, and Notice 2024-73. The restaurant group is invented. Weekly figures are our own arithmetic. Checked November 5, 2026.
