FMLA vs PTO: How They Interact (and Who Has to Offer What)

FMLA and PTO get discussed as alternatives, which they are not. One is a federal job-protection law with strict eligibility rules and no pay attached. The other is a benefit you design yourself. Most absences that involve FMLA also involve PTO, and the interesting questions are all about how they interact.

This is general information rather than legal advice; FMLA has real complexity and state analogues vary widely.

The core difference

The short version: FMLA says you must let them come back. PTO says whether they get paid while gone.

Does FMLA even apply to you?

Two tests, both of which must pass.

The employer test. You have 50 or more employees for at least 20 workweeks in the current or previous calendar year, counting all locations. Then, separately, the specific employee must work at a site with 50 or more employees within 75 miles.

The employee test. They have worked for you at least 12 months (not necessarily consecutive), and at least 1,250 hours in the 12 months immediately before the leave starts. That is roughly 24 hours a week, so many part-timers do not qualify.

If you have fewer than 50 employees, federal FMLA almost certainly does not apply to you at all.

What FMLA covers

Twelve weeks in a 12-month period, for:

• The birth of a child and bonding within the first year
• Placement of a child through adoption or foster care, and bonding
• Caring for a spouse, child, or parent with a serious health condition
• The employee's own serious health condition making them unable to work
• Certain qualifying needs arising from a family member's military deployment

Plus 26 weeks in a single 12-month period to care for a covered servicemember with a serious injury or illness.

"Serious health condition" is narrower than it sounds — it generally means inpatient care or continuing treatment by a healthcare provider. Ordinary short illnesses do not qualify, which is exactly the gap your sick leave policy fills.

The concurrency question

This is the part that matters most in practice.

FMLA leave is unpaid. If an employee has three weeks of accrued PTO and takes twelve weeks of FMLA leave, there are two possible worlds:

Sequential: they use 3 weeks of PTO, then 12 weeks of FMLA. Total absence: 15 weeks. Concurrent: the first 3 weeks are paid from PTO and count against the 12-week FMLA entitlement. Total absence: 12 weeks.

Federal law permits the employer to require the concurrent version. Most employers do, and it is generally the intent behind "employees must substitute accrued paid leave for unpaid FMLA leave."

Three conditions make this stick:

1. Say it in the policy, before it comes up. Deciding at the moment someone requests leave looks like a decision about that person.
2. Apply it to everyone. Selective enforcement is where discrimination claims start.
3. Notify them in writing when leave is designated as FMLA. The designation is the employer's responsibility, not the employee's.

Worked example

Setup: A 60-person company. Jordan, employed three years, full-time, needs eight weeks off for surgery and recovery. They have 14 days (112 hours) of accrued PTO and the company runs a concurrent-substitution policy.

Jordan's PTO balance is now zero and they have four weeks of FMLA entitlement left in the current 12-month period. Health insurance continued throughout on the same terms, with Jordan continuing to pay their usual share.

If the company had short-term disability insurance, weeks 3–8 might be partially paid by the policy rather than unpaid — that is the most common way small employers bridge the gap without buying it out of PTO.

Six things employers get wrong

Forgetting to designate the leave. If you know an absence qualifies, it is your job to designate it as FMLA and tell the employee. Letting someone take eight weeks without designating it and then claiming they used their entitlement does not work.

Counting FMLA absence in attendance discipline. Protected leave cannot count against an attendance policy. This is a common route to a retaliation claim.

Dropping health coverage. Group health benefits must continue during FMLA leave on the same terms as if the employee were working.

Not restoring the same or an equivalent job. Equivalent means pay, benefits, and working conditions — not "a job at the same salary in a worse role."

Applying a use-it-or-lose-it deadline to someone on leave. If your PTO expires on 31 December and an employee is on protected leave in November and December, forcing forfeiture is asking for trouble. See use-it-or-lose-it PTO.

Assuming PTO exhaustion ends the protection. Running out of paid time does not end FMLA entitlement. The remaining weeks are still job-protected, just unpaid.

What a sub-50 employer should do anyway

If FMLA does not cover you, you still need an answer for a serious illness or a new baby, because these events happen on small teams too and "we don't have a policy" becomes a decision made under pressure about a specific person.

A workable minimum:

• A written leave-of-absence policy covering unpaid extended leave, with a stated maximum and a job-restoration commitment. Leave of absence letter covers the employee side of this.
• A parental leave position, even a modest one. Parental leave for small businesses and the parental leave policy template cover the specifics.
• Short-term disability insurance, which is inexpensive per employee and is how most small companies fund a long medical absence without draining PTO.
• Check your state. This is the one that actually catches people out.

Tracking the overlap

Concurrent leave is administratively annoying: one absence, two clocks, one of which drains a paid balance while the other consumes a statutory entitlement. Doing it in a spreadsheet means maintaining a parallel FMLA week-counter and remembering to stop deducting PTO when the balance runs out.

SimplyPTO tracks leave types separately, so paid time and extended unpaid leave show on the same calendar without being counted twice, and every request keeps a dated record of what was approved and by whom. Start free for up to 10 people, or read small business leave compliance for the wider obligations picture.