A leave of absence is time away from work that an employee takes to handle something urgent and unplanned, like a medical emergency, military deployment, or a family crisis. Unlike planned time off, a leave of absence often comes with legal protections, formal approval steps, and questions HR teams need to answer quickly.
With a clear leave management process, you can support employees through these moments while maintaining operational efficiency and staying compliant with labor laws, collective bargaining agreements (CBAs), and your own internal policies. That starts with understanding the different types of leave available, so you can build a policy that fits your organization and workforce, then put the right systems in place to manage requests consistently.
This guide covers what qualifies as a leave of absence, the difference between mandatory and voluntary leave, who’s eligible under the FMLA, common reasons employees request leave, and answers to the questions HR teams ask most.
What is a leave of absence?
A leave of absence is a period of time an employee takes off work, typically to attend to an unplanned or urgent circumstance. It differs from paid time off (PTO) or vacation time, which an employee can accrue and plan for in advance.
Here’s how the two compare side by side:
| Leave of absence | PTO / vacation | |
| Purpose | Unplanned or urgent circumstances — medical, family, or military | Planned rest, vacation, or personal time |
| Accrual | Not accrued — granted case by case or by law | Accrued over time |
| Pay | Often unpaid unless covered by policy | Always paid |
| Legal protection | May be protected under FMLA, ADA, or state law | Governed by company policy, not federal leave law |
| Job security | Protected leave guarantees reinstatement | Not guaranteed under leave law |
Some reasons employees might take a leave of absence include personal or family health issues, military deployment, or bereavement. Leaves of absence may be paid or unpaid, depending on whether they’re mandatory or voluntary.
How long can leaves of absence last?
Leave length depends on the type: a few days for voting leave, several weeks for FMLA, a few months for ADA accommodations, or even years for military service. Which category applies — mandatory or voluntary — determines the difference, so let’s break that down.
Overview: paid, unpaid, voluntary, and involuntary leave
Leave of absence policies also break down along two main lines: whether the leave is paid, and whether the employee or the employer initiates it.
| Type | What it means |
| Paid leave | Employee receives some or all regular pay while away — common for parental or caregiver leave built into company policy |
| Unpaid leave | Employee receives no pay — most FMLA leave falls here unless a state or company policy provides paid coverage |
| Voluntary leave | Employee chooses to request time away, whether for personal reasons or because they don’t yet qualify for mandatory leave |
| Involuntary leave | Employer requires the leave, sometimes as part of a disciplinary process or workplace investigation |
Mandatory leave of absence vs. voluntary leave of absence
A mandatory leave of absence is regulated by federal, local, and state laws. It requires the employee to meet specific eligibility criteria and determines the responsibilities the employer has to the employee regarding their time off.
Federal law doesn’t require paid leave for most mandatory leave, though some state laws obligate employers to pay employees in certain instances. Five federal laws guarantee employees’ rights to take protected leave:
Federally granted leave of absence types
| Type of leave | What it covers |
| Family Medical Leave Act (FMLA) | Eligible employees under FMLA can take up to 12 workweeks of leave in a 12-month period to care for an ill family member, a personal health condition, or a newborn, foster child, or adopted child. If the employee cares for a family member whose condition resulted from active military service, the employee can take up to 26 workweeks off in a 12-month. |
| Americans with Disabilities Act (ADA) | The ADA mandates that employers grant reasonable accommodations — which may include leaves of absence — to employees who have substantial limitations in or more major life activities due to a mental or physical impairment. The length of leave an employee receives under the ADA depends on their job, condition, and individual circumstances. |
| ADA Amendments Act (ADAAA) | In 2008, Congress passed the ADAAA to expand on ADA protections by broadening the definition of “disability” and making eligibility criteria less restrictive. Under the ADAAA, employees not covered under the original ADA legislation may have the right to take a leave of absence as a reasonable accommodation. |
| Uniformed Services Employment and Reemployment Rights Act (USERRA) | USERRA requires employers to reinstate the jobs and benefits of active and Reserve members of the United States Armed Forces upon their return from military service. Under this law, Veterans and Reserve members have a right to reemployment, freedom from discrimination and retaliation, and health insurance protection. |
| Pregnant Workers Fairness Act (PWFA) | Effective since June 2023, the PWFA requires employers with 15 or more employees to provide reasonable accommodations — which can include a leave of absence — for pregnancy, childbirth, or related medical conditions, unless doing so would create significant difficulty or expense for the employer. |
A voluntary leave of absence isn’t subject to federal, state, or local law, except where a CBA requires it. Employers can decide for themselves whether to offer voluntary leave. It’s typically unpaid, so employees usually reserve it for emergencies, though some organizations allow it for personal reasons too.
Employers aren’t required to reinstate employees’ positions after a voluntary leave.
What are protected leaves of absence?
Any leave that employers must provide to employees with the guarantee that the employee can keep their job is considered a protected leave of absence. This includes those covered by both federal and state law. Examples of protected leave include:
- Military service – Under USERRA, Veterans and Reserve members must receive the same pay, seniority, and status as they retained prior to their military leave. Individual states also have laws regarding the employment rights of their National Guard members, including whether their leave must be paid if they’re called to active duty.
- Voting – With the exception of federal employees, employees don’t have guaranteed time off to vote in elections. However, many state laws require employers to allow paid or unpaid leave — typically up to a certain number of hours — to vote in federal, state, and/or local elections.
- Jury duty – Federal law requires employers to provide employees with leave for jury duty, but under the Fair Labor Standards Act (FLSA), it doesn’t require the leave to be paid. Some state laws mandate paid leave for employees on jury duty or forbid employers from forcing employees to use personal leave for jury duty.
Some protected leaves of absence, such as military service and jury duty, are mandatory for employers to provide and for employees to take. Others, such as voting and medical leave, are optional for employees but mandatory for employers to grant. A growing list of states also run their own paid family and medical leave programs, which can extend protections beyond what federal law requires.
Who qualifies for leave under the Family and Medical Leave Act (FMLA)?
One of the most common leaves of absence employees take is an FMLA leave. The FMLA offers eligible employees up to 12 weeks of unpaid leave or up to 26 weeks of Military Caregiver Leave with continuation of group health benefits. To be eligible, an individual must:
- Work for a public agency, an educational institution, or an organization that employs at least 50 people within a 75-mile radius
- Have worked for their employer for at least 12 months
- Have worked at least 1,250 hours for their employer within the past 12 months
The complexity of FMLA leaves and other employee leaves of absence makes them challenging to manage. Many organizations use leave management systems to accommodate FMLA and different types of leave while maintaining accuracy, efficiency, and compliance. While FMLA is strictly for medical leave, employers can approve a voluntary leave of absence for varying reasons.
What is intermittent leave?
FMLA leave doesn’t have to be taken in one continuous block. Intermittent leave lets an eligible employee take FMLA leave in separate periods — sometimes in blocks as short as an hour — to manage an ongoing qualifying condition rather than one extended absence.
Employees most often use intermittent leave for chronic conditions like migraines, for recurring treatment schedules, or for mental health care that requires regular but unpredictable appointments. Because the time off isn’t continuous, tracking it accurately against the FMLA’s 12-week allotment is one of the more complex parts of leave administration, which is where a dedicated solution for leave tracking earns its keep.
Reasons employees request a leave of absence
Employees sometimes request voluntary leaves of absence for personal reasons or when they don’t qualify for mandatory leave. It’s usually unpaid, though some employers offer paid voluntary leave as an organizational policy or handle it case by case. Reasons employees might ask an employer for a leave of absence include:
- Sabbaticals
- Continuing education
- Professional development
- Caregiver duties, mainly if the employee isn’t yet eligible for mandatory leave
- Medical reasons not covered by the FMLA or ADA
- Personal reasons
Maintaining a clear employee leave management procedure enables you to stay updated on your organization’s offerings so you know how to address employee leave requests. The right policies reflect the needs of your organization and employees, and the right leave management system can apply those policies consistently as requests come in.
Reasons for granting a voluntary leave of absence
Choosing to offer employees voluntary leaves of absence makes them feel respected because it shows them that you care about their work-life balance. This promotes overall well-being, job satisfaction, and workplace morale.
Consider creating policies on approved circumstances for taking a voluntary leave. Include rules regarding how long employees can take off and whether it’s paid or unpaid so you can align your organizational needs with the needs of your employees. Then, you can streamline the process with a leave management platform configured to your organization’s distinct requirements.
Extending an employee leave of absence
Organizations can choose whether to extend any leave of absence at their discretion. If an employer grants an employee a leave extension after the eligibility period for mandatory leave ends, the mandatory leave protections for the employee no longer apply.
Although you can establish your own terms for extending the leave, it’s best to check with your HR and legal teams before deciding whether to grant an extension. Understanding how, when, and why to approve and extend leaves of absence can help you develop your organization’s best leave management process.
Frequently asked questions about employee leaves of absence
What’s the difference between a leave of absence and PTO?
PTO and vacation time are planned and accrued for rest or personal use. A leave of absence is granted for an unplanned or qualifying event — like a medical condition, military service, or family emergency — and often comes with legal protections PTO doesn’t have.
Can an employer deny a leave of absence request?
It depends on the type. Employers generally can’t deny leave that’s protected under FMLA, ADA, or applicable state law once an employee meets the eligibility requirements. For voluntary leave, employers have more discretion, though denying a request without a clear, consistent policy can create legal risk.
Can an employee be fired while on a leave of absence?
Not if the leave is protected under FMLA, ADA, or state law. Those employees generally have the right to return to their same or an equivalent position. Employers can still make legitimate, unrelated employment decisions during a leave, but doing so requires careful documentation to avoid the appearance of retaliation.
How long can a leave of absence last?
It depends on the type. FMLA caps eligible leave at 12 weeks in a 12-month period (up to 26 weeks for military caregiver leave), while ADA leave length depends on the individual’s condition and job. Voluntary leave length is set entirely by organizational policy.
What is intermittent leave?
Intermittent leave lets an employee take FMLA leave in separate blocks, sometimes as short as an hour, instead of one continuous absence: chronic conditions, ongoing medical treatment, etc.
Automate your leave management process with TCP Software
Regardless of your organization’s policies regarding leaves of absence, it’s critical to have an effective leave management system in place. A structured process can help you prepare for the potential of mandatory leave and maintain consistent rules around voluntary leave.
This is crucial not only for operational efficiency but also for the employee experience. When employees know how your organization handles leaves of absence, they can trust that your process is fair and know what to expect if they need to take time off.
Part of an effective leave management system is the ability to maintain accurate policies and records. This can challenge even the most experienced HR professionals, as labor law compliance, CBAs, and internal policies about leaves of absence are often complex and challenging to maintain with manual or unspecialized systems.
If mishandled, employers can face costly legal penalties and employee retention issues that hurt their bottom lines. TCP’s leave and accrual management solutions help organizations across industries implement and maintain accurate, efficient leave management processes with features like:
- Configuration based on organizational policies, federal and state laws, and CBAs
- Flexible tracking for different types of leave, such as FMLA and jury duty
- A dedicated FMLA module
- Automated request tracking and request notifications with one-click request approval
When your time tracking and leave management procedures fall under the same umbrella, it simplifies the process for employees and managers alike. If you’re tired of the guesswork and manual management of employee leave, let’s chat about TimeClock Plus and what our leave management capabilities can do for you.
TCP Software’s employee scheduling and time and attendance solutions have the flexibility and scalability to suit your business and your employees, now and as you grow.
From TimeClock Plus, which automates even the most complex payroll calculations and leave management requests, to Humanity Schedule for dynamic employee scheduling that saves you time and money, we have everything you need to meet your organization’s needs, no matter how unique. Plus, with Aladtec, we offer 24/7 public safety scheduling solutions for your hometown heroes.
Ready to learn how TCP Software takes the pain out of employee scheduling and time tracking? Speak with an expert today.
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