Step 1: Understand What the Letter Does (and Doesn't)
The FMLA request letter is formal notice to your employer that you are taking leave under the Family and Medical Leave Act. It does three things: it tells HR which kind of leave you are requesting, it gives them the dates and schedule they need to plan around, and it creates a dated record that you gave notice. That record matters more than the prose. Verbal requests get misremembered; a dated letter does not.
What the letter does not do: it does not prove you are eligible, it does not guarantee the leave will be approved, and it does not replace the medical certification your employer will probably ask for. Think of it as the cover sheet on a formal process, not the whole process. This guide describes the method, not anyone's rights; only HR and an employment attorney can speak to your specific situation.
Step 2: The Plain-English Basics
FMLA is the federal law that lets eligible employees take unpaid, job-protected leave for specific family and medical reasons. In plain English, the four reasons this letter covers are:
- Your own serious health condition. Surgery, treatment, or recovery that keeps you from doing your job, documented by a health care provider.
- A family member's serious health condition. A spouse, child, or parent whose condition requires your care.
- Birth or adoption. Time to bond with a new child.
- Military exigency. Needs arising from a family member's covered military service.
The three basics people run into when requesting FMLA leave are: 12 months of employment with the employer, 1,250 hours worked in the 12 months before the leave starts, and an employer with at least 50 employees within 75 miles of your worksite. Those are the common gateposts, not a self-diagnosis kit. Answer them honestly for your own reference, include them in your letter so HR has context, and let HR confirm where you stand. Our tool's self-check collects exactly these three answers and puts them in the draft as your own statements; it never decides whether you qualify.
Step 3: Gather the Facts Before You Write a Word
Before drafting, pull together these details. HR processes requests by the facts, and a letter missing the basics gets sent back with questions instead of moving forward:
- The reason, in one plain sentence. "I am requesting FMLA leave for my own upcoming surgery." No diagnosis detail beyond what you are comfortable sharing.
- The start date. The actual first day you need to be out. If it is not foreseeable, say so and give the date the need became clear.
- The expected return date. Your best estimate. "Approximately" is fine; HR expects estimates, not guarantees.
- The schedule. One continuous block of time, or intermittent days or a reduced schedule. If intermittent, write out the exact pattern: which days, which hours, and what drives the schedule.
- How to reach you. A phone number or email and any limits ("text only," "mornings only"). Saying this up front avoids HR calling your work line while you are recovering.
- Whether you can provide certification. Employers commonly require a medical certification from a health care provider. If yours can supply it, say so in the letter; HR will usually hand you their preferred form.
Step 4: Use the Six-Part Structure
Every effective FMLA request letter has the same six parts, in this order. HR staff process these in volume, so the structure does half the work for you:
- 1. Header with your employment facts. Your name, job title, department, the HR contact's name, and the date. This is how the letter gets filed correctly.
- 2. The request, stated plainly. One sentence: "I am writing to request leave under the Family and Medical Leave Act." Name it directly; don't bury the ask in backstory.
- 3. The reason in plain terms. One of the four categories, in plain English, with only the detail HR needs. "For my own serious health condition: scheduled surgery on [date]."
- 4. The dates and schedule. Start date, expected return date, and whether the leave is continuous or intermittent. For intermittent leave, spell out the pattern exactly: "Tuesdays and Thursdays for physical therapy, approximately four hours each."
- 5. Contact and certification. How to reach you during leave, and a sentence offering medical certification if HR requires it.
- 6. A clean close. Sign it, date it, and keep a copy with a note of how you delivered it (email, portal, hand-delivered). The copy is your proof of notice.
Step 5: Continuous vs Intermittent — State the Schedule Exactly
This is where FMLA letters most often go wrong, because people describe the schedule vaguely and HR has to guess. Continuous leave is simple: one block of time with a start date and an expected return date. Intermittent leave is leave in separate blocks, or a reduced schedule, and it needs precision:
- Bad: "I may need some time off here and there for treatment." HR cannot plan around this, and it invites a dispute about every absence.
- Good: "I am requesting intermittent leave of two days per week, Tuesdays and Thursdays, for chemotherapy sessions, beginning [date], per my doctor's treatment plan." Every absence then maps to a stated pattern.
Base the pattern on what your health care provider actually supports. If the schedule changes during treatment, send an updated letter; do not just change the pattern silently and assume HR will follow along.
Step 6: Deliver It Right
How you send the letter matters as much as what it says:
- Email is usually best. It creates a dated record automatically. Use your work email if you are still on the job, and BCC or forward a copy to a personal address so you have it if you lose access.
- Follow your employer's process too. If HR requires a portal form or a paper request, submit that as well. The letter is your record; the form is their process. Do both.
- Give notice as early as you can. When the need is foreseeable, 30 days' notice is the general expectation. When it is not foreseeable, give notice as soon as practicable and say in the letter when the need became clear.
- Keep everything. The sent letter, the delivery confirmation, the certification forms, and every reply from HR. If anything goes sideways later, the paper trail is your case.
Example 1: Own Serious Health Condition (Continuous Leave)
The most common FMLA letter. Note how short it is, and how the dates carry the whole request:
"Dear [HR contact name],
I am writing to request leave under the Family and Medical Leave Act for my own serious
health condition. I am scheduled for surgery on [date], and my doctor expects a recovery
period of approximately six weeks.
I am requesting continuous leave beginning [start date], with an expected return date of
[return date]. I can be reached during leave at [phone/email]; I am generally available
in the mornings.
I can provide medical certification from my health care provider if you require it.
Please let me know which form you would like me to use.
Sincerely,
[name, job title, date]"
Example 2: Intermittent Leave for a Family Member
Intermittent leave lives or dies on the schedule paragraph. Be exact:
"Dear [HR contact name],
I am writing to request intermittent leave under the Family and Medical Leave Act to
care for my [spouse/parent/child], who has a serious health condition requiring ongoing
treatment.
I am requesting leave of two days per week, Tuesdays and Thursdays, beginning [date],
for medical appointments and recovery care. My expected schedule is approximately four
hours each of those days. I can adjust the specific days with one week's notice if
staffing requires it.
I can be reached during leave at [phone/email]. I can provide medical certification from
the treating provider if you require it.
Sincerely,
[name, job title, date]"
Example 3: Short Notice (Birth of a Child)
When the need was not foreseeable far in advance, say so plainly. No over-apologizing:
"Dear [HR contact name],
I am writing to request leave under the Family and Medical Leave Act for the birth of my
child, expected on [date]. Because the timing became certain only this week, I am
providing notice as soon as practicable.
I am requesting continuous leave beginning [start date], with an expected return date of
[return date]. I can be reached during leave at [phone/email].
Please let me know what documentation you need from me. Thank you.
Sincerely,
[name, job title, date]"
What Never to Do
These mistakes show up in real letters constantly, and they all hurt. Cut every one of them:
- Don't claim you qualify. "I meet all FMLA requirements" is a legal conclusion you cannot make. State your facts (tenure, hours, employer size) and let HR confirm eligibility.
- Don't predict the outcome. Never write that your leave "will be approved." You are making a request, not issuing a decision.
- Don't overshare medical detail. HR needs the category and the schedule, not your full medical history. Save the detail for the certification form your provider fills out.
- Don't go vague on intermittent leave. "Some time off here and there" is not a schedule. Every absence should map to a pattern you stated in writing.
- Don't threaten or lawyer up in the letter. A request letter that mentions attorneys or lawsuits reads as a dispute, not a request, and HR will treat it as one. If you need a lawyer, get one separately and keep the letter clean.
- Don't send it without keeping a copy. No copy, no proof of notice. Email yourself a copy the moment you send it.
Related Guides
- How to Write a Medical Hardship Letter — when the medical situation also creates a financial problem, document it with the paperwork institutions take seriously.
- How to Respond to a Performance Improvement Plan — if a PIP lands while you are dealing with a health issue, get your written response in the file.
- How to Report Workplace Harassment to HR — another formal written notice to HR, for when the problem is the workplace itself.
- How to Negotiate a Severance Package — if leave turns into an exit, negotiate the terms in writing.
- How to Write a Resignation Letter — when you need to leave the job rather than take leave, exit cleanly.