TL;DR: A leave of absence letter should include your name and the date, the type of leave you're requesting, your expected start and end dates, a one-sentence reason, and a brief transition plan. Keep it short and professional, you don't need to share medical details or justify the request emotionally. Below you'll find three ready-to-use templates (FMLA/medical, personal, and bereavement) plus the exact mistakes that get requests delayed or denied.
Requesting time off for anything longer than a vacation feels like it should come with instructions, and most employee handbooks don't actually provide them. You know you need to ask in writing, but "keep it professional" isn't a template. This guide gives you both: the six elements every leave of absence letter needs, three fill-in-the-blank templates for the most common scenarios, and the specific mistakes that turn a routine request into a drawn-out back-and-forth with HR.
Why You Need a Leave of Absence Letter (Not Just a Conversation)
A verbal request to your manager isn't enough, even if they say yes on the spot. Once you're requesting for a leave that will last more than a few days, you need a paper trail for three reasons.
First, it starts the clock. If your leave qualifies for FMLA or a state paid family and medical leave program, your employer generally has specific windows to respond, for example, they must notify you of your eligibility and rights within five business days of learning you need FMLA leave. A written request gives you (and them) a clear date to measure that against. A hallway conversation doesn't.
Second, it protects you if there's a dispute. Memories are unreliable and managers change jobs. If your leave request is ever questioned, during a return-to-work conversation, a performance review, or a termination dispute, a dated, written request is evidence. A verbal "yeah, that's fine" is not.
Third, it gives HR what they need to process the request correctly. Most employers route leave requests through specific channels, a leave administrator, a third-party claims processor, or a formal internal form. A written letter gives them the information to open the right file the first time, instead of routing your request through follow-up questions that eat into your notice period.
What Every Leave of Absence Letter Should Include
A good letter is short (one page, sometimes just a few paragraphs) but it needs six specific pieces of information to actually be useful to the person reading it.
Your name and the date you're writing. Sounds obvious, but it establishes exactly when your notice period started.
The type of leave you're requesting. Name it specifically: FMLA leave, medical leave, personal leave, bereavement leave, parental leave. This tells HR which policy or law applies and which forms to send you.
Your expected start and end dates. Approximate is fine, especially for medical leave where a firm return date isn't yet known. Say so: "beginning March 3, with an expected return around April 14, pending my provider's assessment."
A brief reason, one sentence. You're categorizing the leave, not justifying it. "For my own serious health condition," "to care for my spouse following surgery," or "for the birth of my child" is sufficient. You don't need details beyond the category.
A transition plan, or an offer to make one. Even a single sentence, "I'll document my open projects and brief [colleague] before I leave", signals that you're being professional about the handoff, which tends to smooth approval.
A request for the relevant paperwork. If you believe FMLA or your state's paid leave program applies, ask for the forms directly: "Please send me the FMLA designation paperwork" or "Please let me know what documentation you need for [state] paid leave." This puts the burden of naming the process on your employer, where it belongs.
Leave out anything beyond those six elements. The single biggest mistake in leave letters is over-explaining, more on that below.
Leave of Absence Letter Templates
Use whichever template matches your situation. All three follow the same six-part structure above; only the language around the reason and documentation changes.
Template 1: FMLA / Medical Leave
Use this when you're requesting leave for your own serious health condition, or believe FMLA applies. Fill in the brackets and delete what doesn't apply.
``` Subject: Leave of Absence Request , [Your Name]
Dear [Manager's Name],
I am writing to formally request a leave of absence beginning [start date], with an expected return date of approximately [end date]. This leave is for my own serious health condition, and I believe it qualifies under the Family and Medical Leave Act.
I will provide medical certification from my healthcare provider within the required timeframe. Please send me the FMLA eligibility notice and designation paperwork, along with any additional forms your company requires.
I will document my current responsibilities and brief [colleague's name or "my team"] before my leave begins, and I'm happy to discuss a transition plan at your convenience.
Thank you for your consideration, [Your Name] [Date] ```
If you're requesting leave to care for a family member instead of for your own condition, swap the second paragraph for: "This leave is to care for my [family member] following [a serious health condition/surgery], and I believe it qualifies under the Family and Medical Leave Act." Your healthcare provider's certification will need to come from your family member's provider instead of your own, that's the WH-380-F form rather than WH-380-E. Our FMLA paperwork guide breaks down exactly which form applies and how to fill it out.
Template 2: Personal Leave of Absence
Personal leave is discretionary (your employer isn't legally required to grant it) so this template leans on making approval easy rather than citing a law.
``` Subject: Personal Leave of Absence Request , [Your Name]
Dear [Manager's Name],
I am writing to request a personal leave of absence from [start date] through [end date] for [brief reason, e.g. "a family matter," "an educational program," "personal reasons"]. I understand this leave is granted at the company's discretion, and I appreciate your consideration.
To make the transition as smooth as possible, I will [document my open projects / train a colleague to cover urgent items / be reachable by email for genuine emergencies, pick what's realistic] before I'm out.
Please let me know if you need any additional information, or if there are conditions on approval I should be aware of.
Thank you, [Your Name] [Date] ```
Notice this version doesn't invoke a specific law, because for personal leave, there usually isn't one to invoke. The persuasive weight comes from showing you'll make the leave low-cost for your employer, not from an emotional appeal.
Template 3: Bereavement Leave
Bereavement leave is typically short and urgent, so this template is deliberately brief, you're not expected to write paragraphs while grieving.
``` Subject: Bereavement Leave Request , [Your Name]
Dear [Manager's Name],
I'm writing to let you know that [relationship, e.g. "my father"] passed away on [date], and I need to take bereavement leave from [start date] through [end date].
I'll be reachable by email for anything urgent, and I'll follow up on my workload when I'm back. Please let me know if there's anything you need from me in the meantime.
Thank you for your understanding, [Your Name] ```
Most companies don't require formal documentation for a short bereavement leave, though some ask for it if you need more than the standard three to five days. Only five states (California, Illinois, Oregon, Vermont, and Washington) legally require employers to provide bereavement leave at all; everywhere else, it runs on your employer's policy. Our bereavement leave guide has the state-by-state breakdown if you're not sure whether yours is one of them.
How Much Notice to Give
How much notice you owe depends on whether the leave is foreseeable.
Foreseeable leave (a scheduled surgery, a due date, a planned sabbatical): give as much advance notice as you reasonably can. For FMLA leave specifically, DOL regulations expect 30 days' notice when the need is foreseeable.
Unforeseeable leave (a sudden diagnosis, an accident, an unexpected death in the family): notify your employer as soon as practicable, typically within one to two business days of learning you need the leave.
Personal leave: there's no legal notice requirement, but since approval is discretionary, more notice generally means a better chance of getting it approved on the terms you want.
If you're not sure whether you meet FMLA's eligibility rules before you send your letter, check our FMLA eligibility guide, you need 12 months of employment, 1,250 hours worked in the past year, and an employer with 50 or more employees within 75 miles, all three at once. If any one of those doesn't hold, your letter should ask about state paid leave or personal leave options instead of FMLA.
Common Mistakes to Avoid
Sending it only verbally, or by casual text. A Slack message to your manager isn't a substitute for a written request that goes into your HR file. Follow up any verbal conversation with the letter, even if your manager already said yes.
Oversharing medical or personal details. You don't need to describe your diagnosis, your prognosis, or your family situation beyond a one-sentence category. A request for a "serious health condition" is enough; a paragraph about your symptoms isn't required and can actually create HIPAA-adjacent complications for whoever reads it.
Being vague about dates. "I need some time off soon" gives HR nothing to work with. Even an approximate range ("starting the week of March 3, returning by mid-April") is far more useful than no dates at all.
Skipping the paperwork request. If you don't ask for the FMLA designation notice or your state's claim form, your employer isn't obligated to volunteer it. Naming the process you believe applies puts the responsibility on them to correct you if you're wrong.
Making it emotional or accusatory. Even if you're frustrated with your workload or your employer's leave policy, the letter itself isn't the place to air it. Save that conversation for HR directly, separate from your leave request.
Waiting until the last minute for foreseeable leave. If you know about a scheduled surgery or a due date weeks in advance, sending the letter the week before doesn't just look unprofessional, for FMLA leave, giving less notice than required can be grounds for your employer to delay the start of your leave.
Forgetting to propose any transition plan. Even a single sentence about coverage tends to speed up approval, because it answers the first question your manager will have: "who's covering this while you're out?"
What NOT to Include
Detailed medical information or diagnosis specifics
Emotional justifications for why you "deserve" the leave
Criticism of your employer, manager, or coworkers
Demands, ultimatums, or threats
Excessive detail about your personal life beyond the leave category
Frequently Asked Questions
How do I write a leave of absence letter?
State the type of leave you're requesting, your expected start and end dates, a one-sentence reason, and a brief transition plan, then ask for the relevant paperwork. Keep it to one page. Use the templates above as a starting point and adjust the specific reason and documentation request to match your situation.
Do I need a leave of absence letter, or is a verbal request enough?
Always put your request in writing, even after a verbal conversation with your manager. A written letter creates a dated record that protects you if there's ever a dispute about when you asked, what you asked for, or whether it was approved.
Can my employer deny my leave request?
It depends on the type. If you're requesting FMLA leave and you meet the eligibility test, 12 months employed, 1,250 hours worked, employer with 50+ employees within 75 miles, your employer generally cannot deny it. If you're requesting personal leave or another discretionary benefit, your employer can deny it for almost any non-discriminatory reason, since it's not legally required.
How much notice do I need to give before requesting leave?
For foreseeable FMLA leave, DOL regulations expect 30 days' notice. For unforeseeable leave (a sudden illness or emergency) notify your employer as soon as practicable, typically within a day or two. Personal leave has no legal notice requirement, but more notice generally improves your odds of approval.
Should I email my leave of absence letter or print it?
Email is standard and creates its own timestamped record, which works in your favor. Some employers also want a signed physical copy or a submission through an HR portal, check your employee handbook, and when in doubt, email it and ask whether any additional format is required.
Do I need to explain my medical condition in the letter?
No. You only need to state that the leave is for "my own serious health condition" or a similarly brief category. The specific diagnosis belongs on your healthcare provider's certification form (WH-380-E or WH-380-F for FMLA), not in your letter to your manager.
What if my company doesn't have an HR department?
Send the letter to whoever handles employment matters (often the owner or a direct manager at a small business) and copy anyone else involved in staffing decisions. The same six elements apply regardless of company size; smaller employers may not be covered by FMLA at all if they have fewer than 50 employees, so check whether a state program applies instead.
Can I request a leave of absence for mental health reasons?
Yes. A mental health condition is covered under FMLA and most state paid leave programs the same way a physical condition is, as long as it meets the "serious health condition" standard. Your letter doesn't need to specify the diagnosis , "my own serious health condition" is sufficient, and the clinical details go on the certification form your provider completes.
How far in advance should I submit a personal leave request?
There's no legal minimum, but because personal leave is entirely at your employer's discretion, more lead time works in your favor. A few weeks of notice, when possible, gives your manager time to plan coverage and makes approval more likely than a request submitted days before you need to leave.
What's the difference between a leave of absence letter and a resignation letter?
A leave of absence letter requests temporary time away from your job with the intent to return; a resignation letter ends your employment permanently. Make the distinction explicit in your letter (state that you expect to return by a specific date) so there's no ambiguity about your intent to keep your position.
Do I need a doctor's note to submit with my leave letter?
Not with the letter itself. Your letter is the initial written request; medical certification is a separate document your healthcare provider completes afterward, usually on your employer's required form. Sending the letter first, then following up with certification once your employer provides the forms, is the standard order of operations.
What happens after I send my leave of absence letter?
For FMLA-eligible leave, your employer generally must notify you of your eligibility and rights within five business days, then send a designation notice once they receive your certification. For personal or discretionary leave, timelines vary, follow up within a week if you haven't heard back, and confirm your approved dates in writing before your leave begins.
Key Takeaways
Always put your leave request in writing, a verbal "yes" isn't a substitute for a dated record
Include six things: your name and date, leave type, expected dates, a one-sentence reason, a transition plan, and a request for paperwork
Match your template to your situation. FMLA/medical, personal, and bereavement letters each carry different weight and different documentation needs
Give 30 days' notice for foreseeable FMLA leave; notify as soon as practicable for anything unforeseeable
Don't overshare, a one-sentence reason category is enough; save clinical detail for the certification form
Check your FMLA eligibility before naming it in your letter, if you don't meet all three tests, ask about state paid leave or personal leave instead
See our complete leave of absence guide for how each leave type differs on pay, job protection, and duration
