Your employer can deny leave without pay in most situations, but not all. Whether LWOP can be denied depends on why you are asking for it: if the reason is covered by a federal law like the Family and Medical Leave Act, the Americans with Disabilities Act, the Pregnant Workers Fairness Act, USERRA, or federal jury duty protections, and you meet the eligibility rules, the employer generally has to grant the time off. For any other reason — a vacation, a personal project, a family trip that isn’t a medical or military matter — the company has broad authority to say no.
When an Employer Can Say No
Most employees in the United States work under at-will arrangements, and most private employers treat unpaid leave as a privilege rather than an entitlement. If your reason doesn’t fall under a federal or state protection, the company can deny the request for almost any business reason: peak season staffing, project deadlines, or simply not wanting the disruption. That denial is lawful as long as it isn’t motivated by discrimination against a protected characteristic like race, sex, or disability.
Company handbooks usually spell out the ground rules. How long you must have worked there before you can ask for LWOP. How many unpaid days are allowed in a year. Whether you have to exhaust your paid vacation and sick time first. That last requirement is common, and many employers won’t even consider an unpaid leave request until your paid balances hit zero. Failing to meet any internal prerequisite gives your manager a clean reason to deny, and you have no legal claim to challenge it.
One caution before you accept a denial at face value: if a disability is involved, running out of leave under the handbook does not end the analysis. The EEOC has stated that an employer must consider providing unpaid leave to a worker with a disability even after all leave under existing policies, workers’ compensation, or the FMLA has been exhausted, so long as the additional leave doesn’t create an undue hardship.1U.S. Equal Employment Opportunity Commission. Employer-Provided Leave and the Americans with Disabilities Act A blanket “you’ve used all your days” response does not automatically override federal disability law.
Reasons an Employer Cannot Deny
FMLA Leave
The Family and Medical Leave Act is the broadest federal protection for unpaid leave. It entitles eligible employees to up to 12 workweeks of job-protected, unpaid leave in any 12-month period for specific qualifying reasons.2Office of the Law Revision Counsel. 29 USC 2612 – Leave Requirement When an FMLA request checks every box, the employer cannot deny it.
Three eligibility requirements have to line up. You must have worked for the employer for at least 12 months, logged at least 1,250 hours of service during the previous 12-month period, and work at a location where the employer has 50 or more employees within a 75-mile radius.3Office of the Law Revision Counsel. 29 USC Chapter 28 – Family and Medical Leave If even one condition isn’t met, your employer has no FMLA obligation, though other protections may still apply.
The qualifying reasons are:
- Caring for a newborn or a newly placed adopted or foster child, taken within 12 months of the birth or placement.
- Caring for a spouse, child, or parent with a serious health condition.
- Your own serious health condition when it prevents you from performing your job.
- A qualifying exigency when a spouse, child, or parent is on or called to covered active duty.
An extended entitlement of up to 26 workweeks in a single 12-month period is available if you are the spouse, child, parent, or next of kin of a covered servicemember with a serious injury or illness.4U.S. Department of Labor. Fact Sheet 28M – Using FMLA Leave Because of a Family Members Military Service
FMLA leave doesn’t have to be taken in one continuous block. When a serious health condition calls for it, you can take leave intermittently or on a reduced schedule, and the employer cannot deny it on the grounds that it’s inconvenient.5U.S. Department of Labor. FMLA Frequently Asked Questions Once you notify your employer that you need leave, the company must tell you whether you are eligible within five business days, and if you are, it has another five business days to formally designate the leave as FMLA-protected.6U.S. Department of Labor. The FMLA Leave Process Missing those deadlines can itself become the basis for an interference claim.
ADA Accommodation Leave
The Americans with Disabilities Act works differently from the FMLA. Instead of setting a fixed number of weeks, it requires employers to provide reasonable accommodations to employees with disabilities, and unpaid leave can qualify as one of those accommodations.7Office of the Law Revision Counsel. 42 USC Chapter 126 – Equal Opportunity for Individuals With Disabilities The ADA covers employers with 15 or more employees, and there is no minimum tenure requirement.
The employer’s only real defense is showing that the leave would create an undue hardship, meaning significant difficulty or expense given the employer’s size, resources, and operations.8Office of the Law Revision Counsel. 42 USC 12111 – Definitions A large corporation will have a harder time meeting that standard than a 20-person shop where one absence reshuffles everyone’s workload.
Because the ADA has no set time limit, an employee can sometimes secure leave well beyond the FMLA’s 12 weeks. But the employer’s position gets stronger as the leave stretches on. EEOC enforcement guidance makes clear that if an employee cannot provide a return date, the employer may deny continued leave when it can show that the open-ended absence disrupts operations and makes planning impossible.9U.S. Equal Employment Opportunity Commission. Enforcement Guidance on Reasonable Accommodation and Undue Hardship Under the ADA Truly indefinite leave with no foreseeable return is the scenario where employers most often prevail. Staying in regular contact with your employer and providing periodic updates on your condition and expected return, even approximate, helps preserve the accommodation.
Pregnancy Accommodations
Since 2024, the Pregnant Workers Fairness Act requires employers with 15 or more employees to provide reasonable accommodations for limitations related to pregnancy, childbirth, or related medical conditions. Leave to recover from childbirth is explicitly listed as an example.10U.S. Equal Employment Opportunity Commission. What You Should Know About the Pregnant Workers Fairness Act As with the ADA, the employer can only deny the accommodation on undue hardship grounds. The PWFA fills a gap for workers who don’t yet qualify for the FMLA (because they haven’t hit 12 months or 1,250 hours) but need pregnancy-related time off. The employer also cannot force you onto leave if a different accommodation would let you keep working.
Military Service Leave
The Uniformed Services Employment and Reemployment Rights Act gives the broadest protection of any federal leave law. It covers essentially all employers regardless of size, applies from your first day on the job, and protects leave for active duty, training, drills, and fitness-for-service exams.11Office of the Law Revision Counsel. 38 USC Chapter 43 – Employment and Reemployment Rights of Members of the Uniformed Services During the absence you are legally on leave, and the employer must reemploy you in your former position or an equivalent one when you return.
Two limits are worth knowing. You (or your commanding officer) must give the employer advance notice of upcoming service unless military necessity or genuine impossibility prevents it.12Office of the Law Revision Counsel. 38 USC 4312 – Reemployment Rights of Persons Who Serve in the Uniformed Services Reemployment protections also generally apply only when cumulative military absences from that employer don’t exceed five years, with numerous exceptions for involuntary extensions, training obligations, and activations during national emergencies.
Jury Duty
Federal law prohibits any employer from firing, threatening, or coercing a permanent employee because of jury service in a federal court. Violators face civil penalties of up to $5,000 per violation and can be ordered to reinstate the employee with full seniority and benefits.13Office of the Law Revision Counsel. 28 USC 1875 – Protection of Jurors Employment Most states have parallel laws covering state jury duty. Whether the time is paid or unpaid depends on employer policy and state law, but the employer cannot deny you the time off or punish you for serving.
How to Make the Request Harder to Deny
A well-prepared request does two things: it gives your employer the information needed to process the leave, and it creates a paper trail if the request is wrongfully denied. Include your proposed start and end dates, the category of leave (medical, military, pregnancy, personal), and whether you’re asking for continuous or intermittent time off.
For FMLA leave, your employer can require a medical certification from your healthcare provider confirming the serious health condition and its expected duration. You must be given at least 15 calendar days to obtain and submit it.5U.S. Department of Labor. FMLA Frequently Asked Questions For military-related leave, a copy of the active duty orders or official military documentation is typically enough, and you only need to provide it once per deployment.14U.S. Department of Labor. The Employees Guide to Military Family Leave
There are limits on what your employer can ask. Under both the ADA and FMLA, the employer can collect information needed to confirm a qualifying condition, identify possible accommodations, and estimate how long you’ll be out. It cannot demand a specific diagnosis for FMLA leave, and requesting medical information that is overly detailed or irrelevant to the accommodation decision can itself violate the ADA. Keep documentation focused on functional limitations and expected timelines rather than volunteering clinical specifics you are not required to share.
If Your Leave Was Wrongfully Denied
If you believe your employer unlawfully denied FMLA leave, you have two options: file a complaint with the Department of Labor’s Wage and Hour Division, or file a private lawsuit. A complaint can be submitted in person, by mail, or by phone at any local Wage and Hour Division office, and it should be filed within a reasonable time of discovering the violation.15U.S. Department of Labor. FMLA Advisor – Enforcement of the FMLA Remedies include lost wages, benefits, and an equal amount in liquidated damages, effectively doubling the payout unless the employer can prove the violation was made in good faith.3Office of the Law Revision Counsel. 29 USC Chapter 28 – Family and Medical Leave
For ADA or PWFA violations, the route runs through the Equal Employment Opportunity Commission. You generally have 180 days from the discriminatory act to file a charge, and that extends to 300 days in states with their own anti-discrimination enforcement agency, which most have.16U.S. Equal Employment Opportunity Commission. Time Limits for Filing a Charge The EEOC accepts filings through its online portal. If you are unsure whether your deadline has passed, contact a field office rather than assuming you are too late.
Retaliation is illegal across every one of these statutes. Under the FMLA, it is unlawful for an employer to fire or discriminate against any employee for requesting or using protected leave, or for participating in a proceeding related to FMLA rights.17Office of the Law Revision Counsel. 29 USC 2615 – Prohibited Acts The ADA and USERRA contain similar anti-retaliation provisions. If your employer denies your request and then writes you up, cuts your hours, or suddenly finds performance problems that were never raised before, those actions may themselves be separate legal violations worth challenging.