How Long Does FMLA Approval Take? The 5- and 15-Day Rules

Updated September 2026

Start to finish, FMLA approval usually takes about three to four weeks — but almost none of that is your employer deciding. Most of it is the 15 days you’re given to return medical paperwork.

Your employer’s own deadlines are short and specific. They have 5 business days to tell you whether you’re eligible, and 5 business days after they have what they need to tell you whether the leave is approved. If they’re taking longer than that, they’re late, and that matters more than most people realize.

The more useful thing to know while you wait: you usually don’t have to. Leave can begin before the paperwork is finished, and protection applies retroactively once the leave is designated.

How Long Does FMLA Approval Take? The Full Timeline

Add it up and the outside edge is roughly 25 to 30 days. But the 15 days is your window, not a waiting period — return the form in three days and the whole thing compresses to about a fortnight.

These deadlines come from 29 CFR 825.300, and they’re obligations, not guidelines.

Your Employer Has 5 Business Days, Not 5 Days

Business days means weekdays, excluding holidays. A request made on a Friday before a long weekend gives them until the following Friday.

The clock starts when they have enough information to know the leave may qualify — not when you fill in a form. You don’t have to say “FMLA.” Telling your manager you’ll be out for surgery, or that you’re caring for a parent after a hospitalization, is enough to start it.

That matters, because employers sometimes treat the clock as starting when you submit paperwork they gave you late.

What Actually Causes Delays

In order of how often they’re the real reason:

The medical certification. Your provider’s office is the usual bottleneck, not HR. Submit the form the day you get it and follow up with the office within a few days — they often sit in a stack.

An incomplete form. If something is missing, your employer must tell you in writing what specifically is insufficient and give you at least seven calendar days to correct it. A vague “we need more information” doesn’t meet that standard, and you can ask them to specify.

A second opinion. Your employer may require one, at their expense, from a provider they choose but who isn’t regularly employed by them. This genuinely extends the timeline. If the two opinions conflict, a third is binding.

Nothing at all. Sometimes the file is sitting on a desk. This is more common than it should be, and it’s the case where following up in writing changes things.

Can You Take Leave Before It’s Approved?

Usually yes, and this is the part that reduces most of the anxiety around the wait.

If your reason qualifies, FMLA protection attaches retroactively once the leave is designated. You do not have to stay at work through a medical emergency waiting for HR to finish processing.

Two things to keep doing while you wait:

Follow normal call-out procedures for every absence. Failing to follow ordinary notice rules is one of the few things that genuinely weakens your position — see can you be fired for calling in sick.

Keep your own dated record of what you submitted and when.

Is Your Employer Late? What to Do

Send a written follow-up. Email beats a conversation, because it creates a dated record. Something short:

Hi [Name] — I requested FMLA leave on [date] and provided my certification on [date]. Under the FMLA regulations I should receive a designation notice within five business days of your having sufficient information. Can you confirm the status and when I can expect the notice? Thank you.

Citing the deadline without argument usually moves things along on its own.

Ask what’s missing, specifically. If they say the certification is insufficient, they owe you that in writing with the gap identified.

Know what a delay can cost them. If an employer fails to give the required notices and that failure causes you harm — you took unprotected time, or you’d have arranged things differently — they can be liable for it. They can also lose the ability to count the time against your 12 weeks. That’s a real consequence, and it’s worth knowing when you follow up.

If it keeps going, you can contact the Wage and Hour Division. There’s no cost and you don’t need a lawyer to make a call.

And watch what happens after you push. Chasing your own leave request is protected activity. If your schedule, assignments or reviews change afterward, that’s a separate issue — see is this workplace retaliation.

Can FMLA Still Be Denied After All That?

Yes, and there are only a few legitimate reasons: you don’t meet the eligibility requirements, the condition doesn’t meet the definition of a serious health condition, you never returned the certification, or you’ve already used your 12 weeks.

A denial has to come with a reason. “Denied” on its own doesn’t meet the employer’s obligation. See can your employer deny FMLA leave.

If the denial is because you’re not eligible, that’s the moment to ask whether the ADA or your state’s leave law applies instead — different rules, different thresholds, and sometimes better protection.

How Much Notice Do You Owe Your Employer?

The obligation runs both ways.

Foreseeable leave — a scheduled surgery, a due date, planned treatment — requires 30 days’ notice where practicable.

Unforeseeable leave — an accident, a sudden hospitalization — requires notice as soon as practicable, generally the same or next business day once you know.

Give less notice than required on foreseeable leave and your employer may delay the start of FMLA protection. That’s one of the few penalties that falls on you, and it’s avoidable.

Frequently Asked Questions

The Bottom Line

Three to four weeks on paper, most of it your certification window rather than your employer’s decision. Your employer owes you two notices, each within five business days, and those are deadlines rather than targets.

The practical advice is short. Get the certification form to your provider the day you receive it, and chase their office rather than HR. Keep dated copies of everything. And don’t put off necessary leave waiting for a letter — if the reason qualifies, the protection reaches back.

If you’re past the five-day mark with nothing, send the email. Most delays end there.

Disclaimer

This article is for general information only and is not legal advice. FMLA rules are detailed and turn on individual facts, and reading this article does not create an attorney-client relationship. Consult a licensed attorney in your state about your specific situation. Please read our Terms and Conditions.

Related Articles

• Can Your Employer Deny FMLA Leave?
• How Long Does FMLA Last?
• What Qualifies as a Serious Health Condition Under FMLA?
• Can You Be Fired While on FMLA?
• Does FMLA Protect Your Job?
• Can You Extend FMLA Beyond 12 Weeks?