FMLA Intermittent Leave: The Complete Guide for HR Professionals

Continuous FMLA leave is straightforward: the employee is out, you backfill the role, they return. Intermittent leave is where FMLA administration actually gets hard. The employee is at work — until suddenly they aren't, for two hours on a Tuesday, or every third Thursday, or for a week whenever a chronic condition flares. Your timekeeping system wasn't built for it, your managers resent it, and the regulations governing it are unforgiving of shortcuts.

This guide covers what intermittent FMLA leave is, when you must grant it, how to count it correctly, and how to respond when you suspect it's being misused — without stepping into an interference claim.

What Intermittent Leave Actually Means

The FMLA regulations recognize three ways to take leave:

• Continuous leave — a single uninterrupted block of time.
• Intermittent leave — leave taken in separate blocks of time for a single qualifying reason.
• Reduced schedule leave — a reduction in the employee's usual number of working hours per workday or workweek.

Intermittent and reduced schedule leave draw from the same 12-workweek entitlement as continuous leave. An employee doesn't get extra time because they took it in pieces. What changes is the accounting.

For a refresher on the underlying terminology, see our Glossary of FMLA Terms 

When You Must Grant It — and When You Don't Have To

This is the distinction most handbooks get wrong.

You must permit intermittent leave when it is medically necessary for:

• The employee's own serious health condition
• Care for a spouse, child, or parent with a serious health condition
• A qualifying exigency arising from a family member's covered active duty
• Military caregiver leave for a covered servicemember

Intermittent leave for bonding is different. Leave taken after the birth of a healthy child, or the placement of a child for adoption or foster care, may be taken intermittently only if the employer agrees. An employer is free to say no. Many employers do agree — but it is a business decision, not a legal obligation, and it should be applied consistently to avoid a discrimination claim layered on top.

Practical rule: if a health care provider certifies medical necessity, you grant it. If the request is for bonding time, you have discretion — but exercise that discretion the same way for every employee.

Eligibility Doesn't Change

Intermittent leave has no separate eligibility test. The employee must still meet all three standard thresholds:

Note the hours test is measured as of the date leave begins. For an employee taking intermittent leave over many months, eligibility is determined at the start of the leave — you do not re-run the 1,250-hour test before each individual absence for the same qualifying reason.

Our FMLA Compliance Checklist walks through the eligibility determination step by step.

Counting Intermittent Leave Correctly

Use your smallest increment — but never more than one hour

Employers must account for intermittent leave using an increment no greater than one hour, and must use the shortest increment they use to account for other forms of leave, provided it is not greater than one hour. If your payroll system tracks PTO in six-minute increments, you track FMLA in six-minute increments.

You may never count more leave against the entitlement than the employee actually takes. Rounding a 20-minute absence up to a half-day is a textbook interference violation.

The physical impossibility exception

There is one narrow exception. If it is physically impossible for an employee to start or end work mid-shift — a laboratory technician who cannot enter or leave a sealed clean room, a flight crew member mid-route — the entire period during which the employee cannot perform work may be counted. This exception is read narrowly. "It's inconvenient for the department" does not qualify.

Employees with variable schedules

When an employee's schedule varies week to week, use a weekly average of the hours scheduled over the 12 months prior to the start of leave, including any hours the employee took as leave of any type.

Holidays

If an employee is on FMLA leave for an entire week that contains a holiday, the full week counts against the entitlement. But when an employee is taking leave intermittently, a holiday on which the employee was not scheduled to work does not count against the entitlement.

Exempt employees and the salary basis rule

Deducting from an exempt employee's salary for unpaid FMLA leave — including partial-day intermittent absences — does not destroy the FLSA exemption. This is a rare, explicit carve-out from the salary basis rule. It applies only to FMLA-qualifying absences; the ordinary partial-day deduction prohibition still applies to everything else.

Certification and Recertification

The certification is your primary control, and most employers underuse it.

For intermittent leave, a complete certification should specify:

• The medical necessity for intermittent or reduced schedule leave
• The expected frequency of flare-ups or episodes (for example, "two to three times per month")
• The expected duration of each episode (for example, "one to three days per episode")
• For planned treatment, the dates and duration of treatment

If the certification is incomplete or insufficient, you must notify the employee in writing, state specifically what information is lacking, and give at least seven calendar days to cure. Do not deny leave on an incomplete certification without giving that opportunity.

Second and third opinions. If you have reason to doubt the validity of a certification for the employee's own serious health condition, you may require a second opinion from a provider of your choosing — at your expense, and not from a provider you employ on a regular basis. If the first and second conflict, a third opinion from a jointly designated provider is final and binding.

Recertification. In general you may request recertification no more often than every 30 days, and only in connection with an absence. If the certification specified a duration longer than 30 days, you must generally wait until that period expires. Regardless of the stated duration, you may request recertification every six months in connection with an absence.

Three circumstances let you request recertification sooner:

1. The employee requests an extension of leave
2. Circumstances described in the original certification have changed significantly
3. You receive information casting doubt on the stated reason for the absence or on the continuing validity of the certification

That third trigger is the one that matters for suspected misuse.

Addressing Suspected Abuse Without Creating Liability

Managers will bring you patterns: absences that fall on Mondays and Fridays, or adjacent to holidays, or on days a disliked shift is scheduled. A pattern alone is not proof — chronic conditions genuinely do flare under stress and disrupted routine. But a pattern is a legitimate basis to act, and the regulations contemplate exactly this.

A defensible sequence:

1. Compare actual usage to the certified frequency and duration. If the certification says two episodes per month lasting one day and the employee has taken nine single days this month, you have an objective, documented discrepancy — not a hunch.
2. Request recertification, and provide the attendance record to the health care provider along with a request that the provider confirm whether the pattern is consistent with the condition.
3. Enforce your call-in procedures. Employees must comply with the employer's usual and customary notice procedures for reporting an absence, absent unusual circumstances. Uniform enforcement is permitted and is often the cleanest control you have.
4. Discipline only for the non-FMLA conduct — failure to follow call-in procedure, dishonesty established through a proper investigation — never for the protected absence itself.

If an investigation is warranted, run it properly. Our training for workplace investigations [link → /hr-workplace-investigations] covers interview technique and documentation standards that hold up under scrutiny.

Transfer to an Alternative Position

When intermittent or reduced schedule leave is foreseeable and based on planned medical treatment, you may temporarily transfer the employee to an available alternative position that better accommodates the recurring absences. The alternative position must have equivalent pay and benefits — though it need not have equivalent duties.

Two limits matter: this applies to foreseeable, planned treatment, not unpredictable flare-ups, and the transfer cannot be used to discourage the employee from taking leave or to create a hardship. Moving a day-shift employee to overnights to make a point is the fact pattern that produces a retaliation verdict.

Where FMLA, ADA, and Workers' Comp Overlap

A single absence can trigger all three statutes at once, and each has different rules.

The most expensive mistake in leave administration is treating FMLA exhaustion as the end of the analysis. When the 12 weeks run out, the ADA question begins. Our Disability & Leave Management training [link → /disability-leave-management] and ADA Compliance Training [link → /ada-compliance-training] address the handoff between the two.

Recordkeeping

FMLA records must be retained for at least three years. For intermittent leave specifically, keep:

• Dates and hours of FMLA leave taken, clearly designated as FMLA
• Copies of employee notices and your Notice of Eligibility, Rights and Responsibilities, and Designation Notice
• Certifications, recertifications, and medical histories — stored in a separate confidential file, not the personnel file

Medical certifications are confidential records. Keeping them in the general personnel file is a standalone violation and a common audit finding. See our HR Recordkeeping Requirements [link → /hr-recordkeeping-requirements] guide for retention periods across all employment records.

Frequently Asked Questions

Can an employee take FMLA leave intermittently for bonding with a new child?

Only if the employer agrees. Unlike leave for a serious health condition, intermittent bonding leave is discretionary. If you agree for one employee, apply the same standard to everyone.

What is the smallest increment I can use to track intermittent FMLA leave?

You must use an increment no greater than one hour, and no larger than the smallest increment you use for other types of leave. If you track PTO in 15-minute blocks, track FMLA the same way.

Can I require a fitness-for-duty certification each time an employee returns from an intermittent absence?

No. For intermittent leave you generally cannot require a fitness-for-duty certification after each absence. Where reasonable safety concerns exist regarding the employee's ability to perform their duties, you may require one no more than once every 30 days.

How often can I request recertification for intermittent leave?

Generally no more than every 30 days and only in connection with an absence, subject to any longer duration stated in the certification. You may always request recertification every six months in connection with an absence, and sooner if the employee requests an extension, circumstances change significantly, or you receive information casting doubt on the stated reason.

Does a holiday count against the FMLA entitlement during intermittent leave?

Not unless the employee was scheduled and expected to work that day. A holiday only consumes entitlement when the employee is on leave for the entire workweek.

Can I discipline an employee for excessive intermittent FMLA absences?

Not for the protected absences themselves. You may discipline for failure to follow your usual call-in procedures, and you may act on misuse established through a legitimate investigation — but the discipline must rest on that conduct, not on the leave.

The Bottom Line

Intermittent FMLA leave is not a compliance problem you solve once. It is an ongoing administrative discipline: certify precisely, track in real increments, recertify when the facts support it, and keep the medical file separate. Employers who lose intermittent leave cases rarely lose on the law — they lose because the tracking was sloppy, the certification was vague, or a manager acted on frustration before HR was consulted.

If you administer leave for a multi-state or high-volume workforce, structured training pays for itself the first time it prevents a single interference claim. Explore our FMLA Training Courses for live and on-demand programs, review the FMLA FAQs  for quick answers, or browse our full catalog of Employment Law Training.