PTO and Leave Tracking Glossary: Every Term Explained
Reviewed for 2026, updated September 8, 2026.
Plain-English definitions of the terms that come up when a US business sets a time-off policy and tracks leave balances, plus answers to the questions we hear most.
- Accrual
- The process by which an employee earns paid time off gradually over time, rather than receiving it all at once. Accrued time is added to the employee's balance on a schedule set by the policy, such as every pay period or for every hour worked.
- Accrual cap
- The maximum balance an employee can hold before accrual pauses. Once the balance reaches the cap, no new time is earned until some is used. Caps are a common alternative to use-it-or-lose-it rules, and in states that treat vacation as wages they are generally the lawful way to limit liability.
- Accrual rate
- The amount of leave earned per unit of time or work, such as ten hours per month or one hour for every thirty hours worked. The rate, combined with the accrual schedule, determines how quickly a balance grows.
- Audit trail
- A dated record of every change to a leave balance, including accruals, approved requests, cancellations, manual adjustments, and who made each change. An audit trail is what allows a balance dispute to be settled with evidence rather than memory.
- Blackout period
- A date range during which time-off requests are not approved, or are approved only in exceptional cases, because of predictable business demand such as a product launch, tax season, or the holiday retail rush. Blackout periods should be published well in advance.
- Bradford Factor
- A scoring formula used to flag patterns of frequent short absences. It multiplies the square of the number of separate absence spells by the total days absent, so many short absences produce a much higher score than one long one. It is a prompt for a conversation, not a verdict.
- Carryover
- Unused leave that transfers from one policy year into the next instead of being forfeited. Policies typically limit carryover to a fixed number of days or hours and may require it to be used by a certain date. Also called rollover.
- Compensated absences liability
- The accounting term for the value of accrued but unused paid leave that a company owes its employees. Under standard US accounting practice it is generally recorded as a liability on the balance sheet, which is one reason accurate balances matter to finance as well as HR.
- Coverage minimum
- The smallest number of people, or the specific roles, that must be working on a given day for a team to function. Managers use coverage minimums to decide whether an additional time-off request can be approved for a particular date.
- Family and Medical Leave Act (FMLA)
- A federal law that requires covered employers, generally those with fifty or more employees, to provide eligible employees with up to twelve weeks of unpaid, job-protected leave in a twelve-month period for qualifying family and medical reasons. Many states have their own leave laws that apply to smaller employers or provide paid benefits.
- Floating holiday
- A paid day off that the employee can take on a date of their choosing, often used to cover religious or cultural observances not on the company holiday calendar. Floating holidays are usually granted rather than accrued and often do not carry over.
- Front-loading
- Granting an employee's entire annual leave allotment on a single date, typically the start of the year or their anniversary, instead of accruing it gradually. It is simple to administer but means an employee can use time before they have effectively earned it.
- Grace period
- A window after the end of a policy year, often the first quarter, during which employees can still use leave carried over from the previous year before it expires. Grace periods soften a carryover limit without eliminating it.
- Leave balance
- The amount of paid time off an employee currently has available, calculated as accruals plus any carryover or adjustments, minus time taken or scheduled. Some systems show both a current balance and a projected balance that accounts for approved future requests.
- Leave request
- A formal ask by an employee to take time off on specific dates, submitted for manager approval. A well-designed request records the leave type, the dates, any partial days, the balance at the time of the request, and the decision.
- Leave type
- A category of absence with its own rules, such as vacation, sick leave, bereavement, jury duty, parental leave, or unpaid leave. Each type may accrue differently, carry over differently, or not draw on a balance at all.
- Negative balance
- A situation in which an employee has taken more leave than they have accrued, effectively borrowing against future accruals. Some policies allow a small negative balance; others prohibit it. Recovering a negative balance from a final paycheck is restricted in some states.
- Paid sick leave law
- A state or local law requiring employers to provide paid sick time with defined accrual rates, caps, carryover rules, and permitted uses. Requirements vary by jurisdiction, and a company with staff in several states may need to follow several different sets of rules.
- Partial-day leave
- Time off that covers less than a full workday, such as a half day or a two-hour appointment. Policies should state the smallest increment that can be requested, and the tracking system should deduct balances in that increment rather than rounding to whole days.
- Pay-period accrual
- An accrual schedule in which a fixed amount of leave is added to the balance every pay period, whether weekly, biweekly, semimonthly, or monthly. It is common for salaried staff because it aligns balance updates with payroll runs.
- Per-hour accrual
- An accrual schedule in which leave is earned in proportion to hours actually worked. It is the fairest model for part-time and variable-hour employees and is the structure most state paid sick leave laws are built around.
- Proration
- Adjusting an employee's leave allotment in proportion to a partial year or a partial schedule, such as a mid-year hire receiving a fraction of the annual grant or a part-time employee accruing at a fraction of the full-time rate.
- PTO (paid time off)
- Any time an employee is away from work while still being paid. The term is used both broadly, to cover vacation, sick time, and holidays together, and narrowly, to describe a single combined bank of days that can be used for any purpose.
- PTO bank
- A single combined balance of paid time off that employees can use for vacation, illness, or personal reasons without distinguishing between them. It simplifies administration but can conflict with state sick leave laws that impose rules on the sick portion.
- Self-service
- A setup in which employees can view their own leave balances, submit and cancel requests, and check approval status directly, without going through an administrator. Self-service reduces the administrator's workload and the number of balance questions, provided the balances shown are accurate.
- Unlimited PTO
- A policy with no fixed allotment or accrual, under which employees take time off at their discretion subject to manager approval. It eliminates accrued liability and payout at separation but requires clear expectations and tracking of days taken, since people often take less time when no number tells them what is normal.
- Unplanned absence
- Time off that was not requested and approved in advance, such as a same-day sick call or a no-show. Tracking unplanned absences separately from planned leave makes it possible to notice patterns and address coverage problems early.
- Use-it-or-lose-it
- A policy under which unused leave is forfeited at the end of the policy year rather than carried over or paid out. Some states restrict or prohibit forfeiture of earned vacation, so many employers use an accrual cap instead.
- Waiting period
- An initial stretch of employment, often the first thirty to ninety days, during which a new hire either does not accrue leave or accrues it but cannot yet use it. Some state sick leave laws limit how long an employer can delay the use of accrued sick time.
Questions people ask
How much paid time off do US employers typically give?
There is no legal minimum for vacation at the federal level, so allotments vary widely by industry, company size, and seniority. Many small businesses start new hires somewhere in the range of ten to fifteen days of vacation plus separate sick time and paid holidays, and increase the allotment with tenure. The right number is the one your team can actually use and the company can cover.
Should a small company offer unlimited PTO?
It can work for teams with strong management and a culture that visibly encourages rest, and it removes the accrued liability from the books. In practice, many small teams find that people take less time under unlimited policies because there is no reference point. If you choose it, set an expected minimum, track days taken, and watch for people who are not using any.
Is sick leave required by law in the United States?
Not federally for private employers, but a growing number of states and cities require paid sick leave, each with its own accrual rate, cap, carryover, and permitted uses. A company with employees in more than one state usually needs to check the rules for each location and apply the most protective one to the staff it covers.
What is the difference between accrued PTO and front-loaded PTO?
Accrued PTO is earned gradually, usually each pay period or per hour worked, so the balance grows through the year. Front-loaded PTO is granted in full on a single date. Front-loading is simpler to explain; accrual is fairer to the company if someone leaves early in the year and is easier to reconcile with payroll.
Do employers have to pay out unused vacation when someone leaves?
It depends on the state and on the written policy. Some states require payout of earned vacation at separation regardless of policy, others allow the employer to decide as long as the policy is clear and communicated, and a few have specific rules about timing. Accurate balances matter here because the final paycheck may need an exact figure.
Can an employer cap how much PTO an employee accrues?
Generally yes. An accrual cap pauses earning once the balance reaches a set maximum, and it is permitted even in states that prohibit forfeiture of earned vacation, as long as the cap is reasonable and applied consistently. The cap should be stated in the policy and enforced automatically by whatever system tracks balances.
How far in advance should employees request time off?
Most small businesses ask for notice of one to two weeks for short absences and longer for extended trips, with exceptions for illness and emergencies. The important thing is that the rule is written down, applied the same way to everyone, and paired with a clear answer about how conflicting requests for the same dates are resolved.
Should managers see who else is out before approving a request?
Yes. Approving a request without knowing the team's coverage for that week is how a small team ends up with half its people gone at once. A shared leave calendar or a coverage view inside the tracking system gives managers that context in seconds and makes the decision more consistent across the team.
How do you handle PTO for part-time employees?
The fairest approach is per-hour accrual, so a part-time employee earns leave in proportion to hours worked. If the company front-loads or accrues per pay period instead, the allotment should be prorated to the employee's schedule. Either way, the policy should say so explicitly, and state sick leave laws usually cover part-time staff too.
What happens to PTO balances when an employee changes from hourly to salaried?
The existing balance carries forward; what changes is the accrual rule going forward. The tracking system should record the date of the change, apply the new rate from that point, and keep the history of the old rate so the balance can be explained later. This is a common source of spreadsheet errors.
How should a company handle holidays that fall during someone's vacation?
A company holiday that falls inside an approved vacation is normally treated as a holiday, not a vacation day, so it should not be deducted from the balance. The policy should say this, and the tracking system should recognize the holiday calendar automatically so managers do not have to adjust deductions by hand.
What should be in a PTO policy for a company's first employees?
At minimum: the leave types offered, the accrual rate and schedule, any waiting period, the request lead time, how conflicts are resolved, the carryover rule, and what happens to unused time at separation. A single page is enough. Write it before the first hire if possible and revise it as the company grows.
How can leave tracking reduce unplanned absences?
Reliable records make patterns visible, such as repeated same-day sick calls around weekends or a person who has not taken planned vacation in a year. Managers can then have an early, specific conversation instead of noticing a problem months later. Easy self-service requests also convert some unplanned absences into planned ones.
Do balances need to match payroll exactly?
Yes, or employees will stop trusting whichever number is lower. If leave is tracked in one system and paid in another, reconcile the two at every pay run or at least monthly, and treat any difference as a bug to be found rather than a rounding issue to be ignored. Integration between the two systems removes most of this work.