In the US, "part-time" and "full-time" are mostly labels that each employer sets. Your hours still matter a great deal, because they can decide whether you're offered health insurance, whether you can join a retirement plan, and how much overtime you earn. This guide explains what changes with your hours and what stays the same.
There's no single legal definition
The Department of Labor says the Fair Labor Standards Act (FLSA), the main federal wage law, doesn't define full-time or part-time employment. Each employer sets its own definition, and the label doesn't change how the FLSA applies to you.
Some specific laws do use hour thresholds, though. The most important one is health insurance.
Hours and health insurance
Under the Affordable Care Act, large employers must offer affordable health coverage to their full-time employees, or risk a payment to the IRS. For this rule:
- Full-time means an average of at least 30 hours a week, or 130 hours a month.
- A large employer is one that averaged at least 50 full-time employees, including full-time equivalents, in the previous year.
So if you work for a large employer and average 30 or more hours a week, you should generally be offered coverage, even if the company calls your role part-time. The requirement doesn't extend to employees averaging under 30 hours, and smaller employers aren't covered by it at all. Some do offer part-time benefits, so ask.
Hours and other benefits
Retirement plans
If your employer has a 401(k), federal rules now open it to many long-term part-time workers. For plan years starting after December 31, 2024, employees who work at least 500 hours in each of two consecutive 12-month periods generally must be allowed to contribute their own money. The employer doesn't have to give these employees a match. Some exceptions apply, so check your plan's Summary Plan Description.
Family and medical leave
The Family and Medical Leave Act gives up to 12 workweeks of unpaid, job-protected leave. To qualify, you need at least 1,250 hours of work with the employer in the previous 12 months, among other conditions. That's roughly 24 hours a week across a year, so some part-time workers qualify and some don't.
Paid time off
The FLSA doesn't require employers to pay for vacations, holidays or sick days, for full-time or part-time staff. Some states and the District of Columbia require covered employers to provide paid sick leave. Check your state labor department for who is covered.
Pay rules apply to every hour
Minimum wage and overtime protections don't depend on whether you're called part-time or full-time.
Minimum wage
The federal minimum wage is $7.25 an hour, and has been since July 24, 2009. Many states have their own minimum wage laws, and some set a higher rate. Employers must comply with both, so the higher rate applies.
For tipped workers, federal law allows employers to pay a cash wage of at least $2.13 an hour, as long as tips bring the total up to at least $7.25. If tips fall short, the employer must make up the difference. State rules on tipped pay can differ.
Overtime under federal law
Nonexempt employees must be paid at least one and a half times their regular rate for hours worked over 40 in a workweek. Key details from the Department of Labor:
- A workweek is a fixed, regularly recurring period of 168 hours, or seven consecutive 24-hour periods. It doesn't have to match the calendar week.
- Each workweek stands alone. An employer can't average 30 hours one week and 50 the next to avoid overtime.
- The FLSA doesn't require overtime for hours over 8 in a day, or for working weekends or holidays, unless your total for the week goes over 40.
- You can't agree to waive overtime, even voluntarily.
- If your employer lets you work extra time, it must pay for it, even if it didn't ask you to.
Daily overtime in some states
Some states go further. California, for example, requires time and a half for hours over 8 in a workday, and double time for hours over 12 in a workday, in addition to the weekly 40-hour rule. Check your state's rules if your shifts are long.
Exempt employees
Some salaried employees are "exempt" from overtime. Under federal rules, an exempt employee generally must be paid a salary of at least $684 a week ($35,568 a year) and meet a test based on their job duties. Job titles don't decide it. Being paid a salary alone doesn't make you exempt.
Worked example: a week with overtime
Darnell works at a distribution center for $18 an hour. He's nonexempt. One week, he works 46 hours.
| Hours | Rate | Pay | |
|---|---|---|---|
| Regular time | 40 | $18.00 | $720.00 |
| Overtime | 6 | $27.00 ($18 × 1.5) | $162.00 |
| Total for the week | 46 | $882.00 |
If Darnell worked in California, a 12-hour shift would earn time and a half for the 4 hours past 8 that day, even in a week where his total stayed under 40. Combining daily and weekly overtime can get complicated, so check the California Labor Commissioner's guidance if it applies to you.
The overtime tax deduction
For tax years 2025 through 2028, the IRS lets eligible workers deduct qualified overtime pay. It covers only the extra "half" of time and a half that the FLSA requires. In Darnell's week, that's $54 ($9 × 6 hours). The annual maximum is $12,500, or $25,000 if you file jointly, and it phases out for modified adjusted gross income over $150,000 ($300,000 joint). You can claim it whether or not you itemize. It's claimed on your federal income tax return, so check IRS guidance on eligibility.
Breaks and hours worked
Under federal rules, short breaks of about 20 minutes or less are usually paid working time. Meal breaks of 30 minutes or more generally don't have to be paid if you're fully relieved from duty. Time spent on-call at your workplace generally counts as work. State rules on breaks vary, so check your state labor department.
Choosing between part-time and full-time
When you compare roles, look beyond the hourly rate.
- Hours: Are they guaranteed, or do they change week to week?
- Health insurance: Will you average 30 or more hours with a large employer? If not, does the employer offer coverage anyway?
- Retirement: Can you join the 401(k), and when?
- Paid time off: Do part-time staff earn PTO, and at what rate?
- Overtime: How often is overtime offered, and is it voluntary?
- Schedule: Fixed shifts, rotating shifts or on-call?
On Joboru, employers post jobs directly and pay is shown when the employer states it, so you can compare hourly rates and salaries before you apply.
Sources
- US Department of Labor, Full-time employment
- IRS, Identifying full-time employees
- IRS, Employer shared responsibility provisions
- Federal Register, Long-term, part-time employee rules for 401(k) arrangements
- US Department of Labor, Family and Medical Leave Act
- US Department of Labor, Vacation leave
- US Department of Labor Women's Bureau, Paid leave
- US Department of Labor, Minimum wage
- US Department of Labor, Minimum wages for tipped employees
- US Department of Labor, Overtime pay
- US Department of Labor, Fact Sheet #23, Overtime pay requirements of the FLSA
- US Department of Labor, Fact Sheet #22, Hours worked under the FLSA
- US Department of Labor, Fact Sheet #17A, Exemptions
- US Department of Labor, Earnings thresholds for the EAP exemption
- California Labor Commissioner, Overtime FAQ
- IRS, What to know about the No Tax on Overtime deduction
- IRS, Working Families Tax Cuts: tax deductions for working Americans and seniors
Facts checked 6 October 2026. This guide is general information, not legal or tax advice.
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