Can Your Employer Make You Use PTO During FMLA Leave?

Updated October 2026

You put in for FMLA leave. The approval comes back, and buried in it is a line saying your three weeks of accrued vacation will be applied to the leave. Nobody asked you. By the time you come back, the time off you’d been saving for two years is gone, and your twelve weeks didn’t get any longer.

Most people assume that can’t be right. It usually is.

The Short Answer

Yes. In most cases your employer can require you to use your accrued PTO, vacation or sick time during FMLA leave, and your twelve weeks do not extend because of it. The paid leave and the unpaid FMLA leave run at the same time — that’s the whole design.

There are two real exceptions, and one of them is recent. Your employer cannot force your PTO on top of benefits you’re receiving from a state paid family leave program, and it cannot force it while you’re being paid by an employer disability plan or workers’ compensation. Outside those situations, the answer is that your employer gets to decide, as long as it follows its own written leave policy and tells you in writing.

Because the leave is unpaid, the regulations create something called substitution. The FMLA substitution rule puts it this way: “FMLA permits an eligible employee to choose to substitute accrued paid leave for FMLA leave. If an employee does not choose to substitute accrued paid leave, the employer may require the employee to substitute accrued paid leave for unpaid FMLA leave.”

Read the second sentence twice. The choice is yours first. If you don’t make it, it becomes theirs.

Substitution means the two kinds of leave run concurrently. You’re on FMLA leave and you’re on paid vacation at the same moment. You get paid, which is the upside, and the clock on your twelve weeks keeps running, which is the part that surprises people.

The Two Situations Where They Can’t

You’re Being Paid by a State Leave Program

This is the exception most people — and plenty of HR departments — don’t know about yet.

A growing number of states run paid family and medical leave programs that pay you a portion of your wages while you’re out. California, New Jersey, New York, Rhode Island, Washington, Massachusetts, Connecticut, Colorado, Oregon, Delaware, Maine, Minnesota and the District of Columbia all have programs, Maryland is phasing one in, and more states keep adding them. Check whether yours does before you assume anything, because the answer changes if it does.

In a January 2025 opinion letter, the Wage and Hour Division concluded that when you’re being paid by one of those programs, your FMLA leave isn’t unpaid — so there’s nothing for your PTO to substitute for. Its words: “neither the employer nor the employee may use the FMLA substitution provision to unilaterally require the concurrent use of employer-provided paid leave.”

Note that it cuts both ways. Your employer can’t make you use your vacation days, and you can’t demand to use them either.

What you can do is agree. The letter says “the employer and the employee may agree, where state law permits, to use the employee’s employer-provided accrued paid leave to supplement the payments under a state or local leave program.” Most state programs replace somewhere between half and ninety percent of your wages, so topping up the gap with PTO is often exactly what you want — but it has to be an agreement, not an instruction.

And it’s temporary. Once the state benefits run out, the leave becomes unpaid again, and from that point the ordinary rule returns: you can elect to use PTO, or your employer can require it.

If you’re in one of those states, paid family leave versus FMLA covers how the two programs stack.

You’re on Disability Benefits or Workers’ Compensation

Same logic, different source of money, and this one has been settled for years.

If you’re receiving payments under an employer disability plan, the regulation says the leave isn’t unpaid, so substitution simply doesn’t apply: “Because leave pursuant to a disability benefit plan is not unpaid, the provision for substitution of the employee’s accrued paid leave is inapplicable, and neither the employee nor the employer may require the substitution of paid leave.”

The same reasoning covers workers’ compensation wage benefits. If you’re hurt on the job and collecting comp, your employer cannot run your vacation days alongside it to make up the difference.

Here too, you and your employer can agree to supplement. They just can’t impose it.

If this is your situation, read short-term disability versus FMLA and, for a work injury, your job protections under workers’ compensation.

Your Situation	Can Your Employer Require PTO?	Can You Insist on Using It?
FMLA leave that is otherwise unpaid	Yes, under its own leave policy	Yes
FMLA while collecting state paid family or medical leave	No	No — but you can both agree to supplement
FMLA while on an employer disability plan or workers’ comp	No	No — but you can both agree to supplement
State or disability benefits have run out, leave is now unpaid	Yes, from that point forward	Yes

Your Employer Has to Tell You in Writing

This is the part worth knowing even if the substitution itself was lawful.

When your employer designates leave as FMLA leave, it has to give you a written designation notice — Form WH-382 is the Labor Department’s version, and many employers use it directly. According to the Labor Department’s guidance on employer notification requirements, that notice has to state “whether the employee is required to substitute paid leave for unpaid FMLA leave,” and the employer “must provide the employee with a written designation notice within five business days, absent extenuating circumstances.”

So if your vacation balance quietly went to zero and you were never told in writing that it would, that’s a separate problem from whether the substitution was allowed. Your employer skipped a notice obligation, and notice failures matter — they’re the kind of thing that supports an interference claim when a worker was harmed by not knowing where they stood.

Go find the paperwork from when your leave was approved and read what it actually says.

What Your Employer’s Own Policy Can and Can’t Do

Substitution isn’t unlimited. The same regulation ties it to the employer’s own rules: “An employee’s ability to substitute accrued paid leave is determined by the terms and conditions of the employer’s normal leave policy.”

That constrains both directions. Your employer can’t invent a special rule for FMLA that it doesn’t apply the rest of the time. And where its policy genuinely wouldn’t permit the paid leave to be used this way, it can’t require the substitution either.

Sick leave is the common example. Many employers have sick-leave policies that only cover the employee’s own illness. If you’re taking FMLA leave to care for a parent, a policy like that wouldn’t reach your situation, and your employer generally can’t make you burn sick days on it — though it could still require your vacation or general PTO, if its vacation policy allows.

Get your handbook. The question of what your employer can require is answered as much by its own policy as by the regulation.

Using PTO Doesn’t Buy You More Time

A clear one, because it costs people real weeks.

If you have twelve weeks of FMLA entitlement and your employer applies three weeks of PTO to it, you have nine weeks of FMLA left, not twelve. The leaves run together. Your job protection ends twelve weeks from when the leave started, whether you were paid for some of it or none of it.

How long FMLA lasts covers how the twelve months are measured, which matters more than most people expect. And whether you keep accruing PTO while you’re out is a different question with a different answer.

What If You’d Rather Use Your PTO?

Then say so, in writing, at the start.

The regulation gives you the first move — you may choose to substitute. If you want to be paid during your leave and your employer hasn’t said anything, elect it yourself rather than waiting to see what they do. Put it in the same message where you request the leave.

The reason to be deliberate about this is that the choice is rarely about the money alone. Some people want the pay now. Others want to come back from twelve unpaid weeks with their vacation bank intact, because they know they’ll need days off for follow-up appointments once they’re back at work and FMLA is spent. Both are reasonable. What you don’t want is for the decision to be made for you by default.

If You Think Your Employer Got It Wrong

Start with the documents. Pull your designation notice, your handbook’s leave policy, and your pay records covering the leave.

Then work through four questions in order. Was your leave actually unpaid during the period they applied PTO to it, or were you receiving state program, disability, or workers’ comp benefits? Did the designation notice tell you in writing that paid leave would be substituted? Does your employer’s own written policy permit the kind of paid leave they used for the reason you were out? And did they treat you the same way they treat other employees on leave?

A no to any of those is worth raising, in writing, with HR. If it doesn’t get fixed, the Wage and Hour Division enforces the FMLA and takes complaints at no charge, and an employment lawyer in your state can tell you whether the time you lost is recoverable.

Most workers who lose vacation days to FMLA leave lost them lawfully, and the useful thing to know is which situation you’re actually in — because the exceptions are not edge cases, and anyone on state paid leave or short-term disability is in one of them. The document that decides it is the designation notice you were handed when your leave was approved, not your memory of the conversation. Go read it before you do anything else.

Frequently Asked Questions

Do you have to use your vacation days during FMLA leave?

If your FMLA leave is otherwise unpaid, yes — your employer can require you to substitute accrued vacation or PTO, as long as it follows its own leave policy and told you in writing. If you’re being paid by a state paid family leave program, an employer disability plan, or workers’ compensation, your employer cannot require it.

Does using PTO during FMLA extend your twelve weeks?

No. Paid leave and FMLA leave run concurrently, not consecutively. Three weeks of PTO applied to FMLA leave leaves you with nine weeks of entitlement, not fifteen.

Can your employer make you use PTO before FMLA starts?

No. Leave that qualifies for FMLA has to be designated as FMLA leave once your employer knows the reason for it. An employer can’t hold the FMLA clock while you spend vacation days first and then start your twelve weeks afterward.

Can your employer make you use sick leave instead of vacation?

Only if its sick-leave policy actually covers your reason for being out. Substitution is governed by the terms of the employer’s normal leave policy, so a sick-leave policy limited to your own illness generally can’t be applied to leave you’re taking to care for a family member.

What if you’re getting short-term disability payments?

Then the leave isn’t unpaid, and neither you nor your employer can require substitution. You can agree to use PTO to make up the gap between your disability payment and your full wage, but your employer can’t impose it.

What if your employer never told you it was using your PTO?

That’s a notice problem on top of everything else. The written designation notice has to state whether paid leave will be substituted, and it’s due within five business days. Find the notice you were given and compare it to what actually happened to your balances.

Disclaimer

This article is general information about employment law in the United States and is not legal advice. Reading it does not create an attorney-client relationship. FMLA rules interact with state leave laws that vary considerably, and the right answer for your situation depends on your employer’s own policy and the facts of your leave. For advice about your own circumstances, consult an attorney licensed in your state. See our Disclaimer and Terms and Conditions.

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Can Your Employer Make You Use PTO During FMLA Leave?