FMLA Leave: What US Employers Need to Know

The Family and Medical Leave Act (FMLA) is one of those federal employment laws that lives in the background—mostly ignored until you actually need it. Then it becomes the most important thing you've ever read. It gives eligible employees the right to take unpaid, job-protected leave for serious health conditions, birth, adoption, and military service. And yes, it places real obligations on employers to administer it correctly. Get FMLA wrong, and you're looking at lawsuits, back pay, and damage to your reputation.

But here's the thing: FMLA is not actually that complicated. You don't need an employment lawyer on payroll. You need a clear process, accurate records, and attention to detail. This guide walks you through what FMLA means for your business, what you're legally required to do, and where small employers commonly trip up.

Who is covered—and who do you have to cover?

FMLA applies to covered employers—that's you if:

You're a private employer with 50 or more employees within a 75-mile radius (and you've maintained that headcount for at least 20 workweeks in the current or preceding calendar year)
You're a public employer (federal, state, or local government) of any size
You're an elementary or secondary school of any size

Fewer than 50 employees within 75 miles? The federal FMLA doesn't apply. But many states have their own family leave laws with lower thresholds. California, New York, and Massachusetts, for example, cover employers with as few as 6–20 employees. So check your state's rules even if you're not federally covered.

For your employees to qualify, all four of these must be true:

They work for a covered employer (you)
They've worked there for at least 12 months (doesn't have to be consecutive)
They've worked at least 1,250 hours in those 12 months
They work at a location where you have 50+ employees within 75 miles

If one criterion fails, they don't qualify—though you can offer leave anyway.

What FMLA actually provides

Eligible employees get up to 12 weeks of unpaid, job-protected leave per 12-month period for:

Their own serious health condition — anything that prevents them from doing their job (surgery recovery, serious illness, ongoing treatment)
A family member's serious health condition — to care for a spouse, child, or parent
Birth and bonding — within the first year of a child's birth
Adoption or foster care placement — again, within the first year
Military qualifying exigency — when their spouse, child, or parent is on active duty or called to it
Military caregiver leave — up to 26 weeks (not 12) to care for a servicemember with a serious injury or illness

When they return from FMLA leave, they go back to their same job or an equivalent one with equivalent pay and benefits. You must maintain their health insurance during leave—they keep paying their share of the premium, but coverage doesn't lapse.

Your obligations as the employer

This is where small employers stumble most. FMLA requires you to follow a specific process with notices, certifications, and documentation.

The notice requirement

The moment an employee (or someone on their behalf) mentions something that might qualify for FMLA—"I need time off for my mom's surgery," "I'm having a procedure"—you have five business days to respond. Within that window:

Tell them whether they're eligible. If not, explain at least one reason why.
Explain their rights and responsibilities. Describe whether you'll require medical certification, whether you'll substitute paid leave, how premium payments work during leave, and whether you'll require a fitness-for-duty certificate when they return.
Designate the leave. Once you have enough information, confirm in writing whether this leave counts as FMLA.

Critical point: the employee doesn't need to say "I want FMLA leave." Any request that might qualify triggers your obligation to notify them.

Medical certification

You can require a doctor's note using the U.S. Department of Labor's official forms—WH-380-E for the employee's condition, WH-380-F for a family member's. The doctor fills it out, the employee brings it back. Give them at least 15 calendar days. If you doubt the certification, you can require a second opinion (at your cost). If the first and second opinions conflict, you can hire a third physician (mutually agreed), and that opinion is binding.

Tracking and record-keeping

Keep records for three years:

Payroll and employee ID data
Dates of FMLA leave taken
Copies of all notices you sent and received
Medical certifications
Premium payment records during leave

This is painful without a system. If you use integrated timekeeping and payroll software—one that tracks hours worked and hours on leave in the same place—you avoid a lot of manual headaches. Intermittent leave gets messy fast without precise records. Tracking time accurately is the difference between compliance and chaos.

Tracking intermittent leave and the 12-month period

FMLA leave doesn't have to be continuous. Employees take it in chunks for recurring medical appointments, chronic conditions with flare-ups, or reduced hours during recovery. This creates tracking headaches—but it's your legal obligation to get it right.

Pick one method for measuring the 12-month period and stick with it consistently:

Calendar year (January 1–December 31)
Fixed 12-month period (fiscal year, anniversary date, etc.)
Forward 12 months (from the first day of FMLA leave taken)
Rolling 12 months backward (from each date leave is taken)

The rolling backward method is usually best for employers—it prevents employees from stacking leave at year-end and beginning of the following year.

Common mistakes and state law complications

Not recognizing FMLA requests. Most common mistake. An employee doesn't need to say the word "FMLA." If they ask for time off for reasons that might qualify, you must provide notice. Failing to recognize this is expensive litigation.

Counting FMLA leave against attendance policies. You cannot penalize FMLA absences or count them as unexcused absences. If your handbook says "three unexcused absences = warning," FMLA time doesn't count toward that three.

Retaliating because they took leave. This is obvious in principle, difficult in practice. If you fire someone two weeks after they return from FMLA leave, any lawyer will ask: "Would you have fired them otherwise?" Document performance issues independently and before the leave. The EEOC's employer guidance covers related anti-retaliation protections.

Forgetting health benefits during leave. Your obligation to maintain coverage doesn't pause. They keep their insurance; they keep paying their share.

State laws. Many states have family leave laws that are more generous than federal FMLA. California and New York cover employers with 20+ employees (vs. 50 federally) and often provide paid leave. Massachusetts requires unpaid leave for employers with 6+ employees. You must comply with whichever law is more generous to the employee. Managing parental leave transitions is harder in states with overlapping requirements, so map your state's rules carefully.

Building your FMLA process

Determine: Are you a covered employer? (50+ employees in a 75-mile radius?)
Determine: Is this employee eligible? (12 months tenure, 1,250 hours worked, proper work location?)
Train your managers to spot FMLA requests—even when FMLA isn't mentioned
Use Department of Labor forms for notices and medical certifications
Track leave meticulously using timekeeping software
Keep three years of records
Review your handbook and state laws annually

Frequently Asked Questions

Q: Does "serious health condition" include mental health? A: Yes. Depression, anxiety, and other mental health conditions that require ongoing treatment or prevent the employee from working qualify as serious health conditions. Avoid asking for specific diagnoses; ask only what you need to confirm it qualifies.

Q: Can I require employees to use paid time off before unpaid FMLA leave? A: Federal FMLA allows substitution of paid leave, and many employers require this. But your state law might override federal rules. Your notice to the employee must clearly state your policy. Check your state's rules—some require paid leave to run concurrently with FMLA, not before it.

Q: What if an employee takes FMLA leave and then gets fired for an unrelated reason? A: Document everything. If you have a legitimate, documented performance issue before the leave (or clearly independent of it afterward), you're on safer ground. Timing matters enormously. If they've been a solid performer and you fire them two weeks after they return, any employment lawyer will have questions.

Q: Do I have to give advance notice for unexpected medical emergencies? A: No. For unforeseeable leave, provide FMLA notice as soon as practicable—usually within one or two business days. The employee must still follow your normal call-in procedures, but the formal FMLA notice can follow.

Q: What about remote workers—how do I count the "75-mile radius"? A: The 75-mile radius measures whether your employer has 50 employees physically located within that distance, not where the work happens. If your remote employee lives in a city where you have 50+ other employees within 75 miles, they're covered. If they're the only employee in a rural area, they might not be covered. Look at your workforce's physical locations.

Q: Can an employee take FMLA leave in small chunks—one day here, two days there? A: Yes, if it's medically necessary. You track the hours against the 12-week (480-hour) entitlement. This is why time-tracking is critical—every missing hour makes your records unreliable.

Q: Does FMLA cover paternity leave? A: FMLA covers birth and bonding for any parent (mother or father). Federal paid paternity leave doesn't exist—though some states offer it. Either parent can take unpaid FMLA leave to bond with a newborn. If you want to attract talent, consider whether how you handle parental leave is competitive for your region.

The bottom line

FMLA is a legal floor, not a ceiling. You must follow it, but you can offer more generous leave if you choose. The employers who get FMLA right are the ones who:

Recognize requests early (even when FMLA isn't mentioned)
Follow the notice procedure every single time
Use standardized Department of Labor forms
Track leave accurately using reliable systems
Keep records for three years
Treat employees fairly and never retaliate

If you have fewer than 50 employees in a 75-mile radius, check your state law—you might still be covered. If you're covered by federal FMLA, build the process once and repeat it consistently. Your future self (and your employment law insurance) will thank you.