PTO accrual calculator: the formula, state accrual floors, and payout rules

§1Two ways employers actually calculate accrual

Most PTO accrual policies use one of two formulas, and mixing them up is the single most common source of accrual errors. The hours-worked method divides annual PTO hours by a standard annual hours figure, usually 2,080 for a 40-hour-a-week full-time employee, to produce an accrual rate per hour worked. A 120-hour (15-day) annual grant becomes 120 divided by 2,080, or 0.0577 hours earned per hour worked, roughly 2.31 hours per 40-hour week. This method scales naturally with overtime and part-time schedules, which is why it dominates for hourly and non-exempt staff, the same population covered by our hourly payroll tax calculator.

The per-pay-period method instead divides annual PTO hours by the number of pay periods and grants a fixed amount on each payroll run, no matter how many hours the employee actually worked that period. The same 120-hour grant becomes 120 divided by 26 biweekly periods, or 4.615 hours per period, whether the employee worked 80 hours or took three days off. This is the standard approach for salaried exempt staff, who typically are not clocking hours, and it is simpler to administer, but it will not automatically adjust for a mid-period hire or a leave of absence the way the hours-worked method does.

A third pattern, front-loading, grants the full annual balance on day one or on the employee's anniversary date and is not an accrual at all. Front-loaded plans skip the per-period math entirely but raise a different problem: what happens to the unused balance if the employee leaves nine months in, having already been advanced a full twelve months of leave. Employers using front-loading need a separate clawback or proration rule for early departures, something purely accrual-based plans do not need.

§2A worked example: proration at hire

Take a non-exempt employee hired on March 16 into a role with 120 hours (15 days) of annual PTO, paid biweekly, using the hours-worked formula (the same clock-time discipline our time card calculator applies to hourly pay). From the March 16 start through year end, the employee has roughly 41 weeks of scheduled work remaining, or about 1,640 scheduled hours at 40 hours a week. At an accrual rate of 0.0577 hours per hour worked, that employee earns approximately 94.6 hours of PTO in the partial first year, not the full 120. That is the correct outcome: PTO is earned as hours are worked, it is not owed in advance for a year not yet worked. Getting this wrong in either direction creates a real liability. Over-accruing inflates the employer's PTO payout obligation at termination in states that treat accrued leave as wages (see below); under-accruing shortchanges the employee and, in those same states, can become a wage claim.

§3Caps are legal almost everywhere; forfeiture is not, in a growing list of states

A cap limits how much PTO an employee can hold at once: once the balance hits the ceiling, no further hours accrue until the employee uses some down. A use-it-or-lose-it policy instead deletes unused hours outright, typically at year end. The distinction matters because several states treat these two mechanisms very differently under wage law.

California's Department of Industrial Relations puts it directly in its own wage FAQ: "vacation pay is another form of wages which vests as it is earned," so "a policy that provides for the forfeiture of vacation pay that is not used by a specified date ('use it or lose it') is an illegal policy under California law and will not be recognized by the Labor Commissioner." The same guidance explicitly carves out caps as acceptable: "a vacation policy that places a 'cap' or 'ceiling' on vacation pay accruals is permissible," because a cap merely pauses future accrual, it does not delete hours already earned [California Department of Industrial Relations, DLSE FAQ, accessed 2026-08-31]. Colorado, Montana, and Nebraska apply the same underlying logic, treating earned PTO as a wage that cannot be stripped away once accrued, while still permitting accrual caps.

This is not a settled national picture. A Pennsylvania state legislator introduced a bill in 2026 aimed at limiting use-it-or-lose-it policies in that state, modeled explicitly on the California, Colorado, Montana, and Nebraska approach, though it had not passed as of late August 2026 and remained a proposal, not law [Pennsylvania House Democratic Caucus press coverage, 2026]. A calculator or policy built on the assumption that forfeiture is safe everywhere, or that it is banned everywhere, will be wrong for a meaningful share of a multi-state workforce.

§4Where a state paid-sick-leave floor hides inside a general PTO bank

Federal law sets no accrual floor at all. The Fair Labor Standards Act does not require paid vacation, PTO, or sick leave of any kind; these are matters of employer policy or agreement, not federal entitlement [U.S. Department of Labor, general topic guidance on vacation and sick leave]. That absence of a federal rule is exactly why state law matters so much here, and it is also why a generic "best practice" PTO percentage from a national survey can undersell what a specific state actually requires.

As of 2026, 18 states plus the District of Columbia mandate paid sick leave for private employers, and three more, Illinois, Maine, and Nevada, mandate earned paid leave usable for any purpose, not only illness [Congressional Research Service, Paid Sick Leave in the United States, R48921, April 28, 2026]. Most of these laws share the same accrual shape: one hour of leave for every 30 hours worked, though the annual cap, employer-size thresholds, and even the exemption for salaried administrative, executive, or professional workers (the exempt vs. non-exempt distinction) vary sharply by state. California caps the mandate at 80 hours per benefit year on that 1-per-30 rate. Colorado caps it at 48 hours on the same rate. The District of Columbia scales the required rate by employer size instead, from 1 hour per 87 hours worked for the smallest covered employers up to 1 hour per 37 hours worked for employers with 100 or more employees, capped at 3 to 7 days depending on size [Congressional Research Service, R48921, Table A-1, March 2026 data].

The practical implication for a general PTO bank: if a company folds sick leave into one combined PTO policy without tracking a separate sick bank, the combined accrual rate and any cap must still satisfy the state's sick-leave-specific floor, even though the PTO label makes the two look interchangeable. A generous-looking 10-day PTO policy can still fall short of a state's sick leave accrual rate if the accrual schedule front-loads leave unevenly across the year, leaving an employee short of the required minimum during early months.

§5What a typical PTO policy actually looks like nationally

The most recent National Compensation Survey benefits data from the Bureau of Labor Statistics, covering paid vacation specifically, not combined PTO, found that after one year of service 34% of private industry workers received 10 to 14 days of paid vacation, 18% received 15 to 19 days, and 8% received fewer than 5 days. After five years of service, the distribution shifts meaningfully toward the middle: 32% received 15 to 19 days and 30% received 10 to 14 days [U.S. Bureau of Labor Statistics, National Compensation Survey, March 2021, the most recent published benefits vintage for this specific breakdown]. Access itself varies enormously by industry: 95% of manufacturing and financial-activities workers had access to paid vacation leave at all, compared with 43% of leisure and hospitality workers [BLS, National Compensation Survey, March 2021].

These are vacation-only figures, they predate several of the state paid-sick-leave expansions detailed above, so a small business benchmarking its own policy against them should treat the numbers as a floor for competitiveness, not a ceiling, and should check the newer state sick-leave minimums on their own terms; a generous vacation allotment does not automatically cover them.

§6Frequently asked questions

Is PTO accrual required by federal law? No. There is no federal accrual mandate; the DOL states plainly, in its own public materials, that time off for a vacation, a general PTO bank, or medical leave in any form is a matter of agreement between an employer and employee, not something federal wage-and-hour law forces on anyone. A specific type of leave can still be mandated at the state level, most commonly paid sick leave.

Can an employer cap how much PTO I can bank? In most states, yes. A ceiling that simply pauses further accrual once a balance is full is treated very differently from erasing time an employee has already banked. California's own wage regulator draws exactly that line in its official vacation-pay FAQ, permitting the former while calling the latter illegal.

Is unused PTO the same thing as unused vacation for payout purposes? Not always. Some employers split a forfeit-at-year-end sick allowance from an earned, payable vacation balance within one combined PTO label, and which payout rule applies at termination depends on which portion the hours legally belong to, not on what the internal policy calls the time off; a well-written employee handbook spells this out explicitly rather than leaving it implied (see our multi-state handbook builder guide for how to document state-specific carve-outs).

Does the common 1-hour-per-30-hours accrual rate apply to salaried exempt employees too? It depends on the state. Several states carve certain white-collar salaried roles out of their own mandate for that kind of leave entirely, so a combined-PTO rate for exempt staff should be checked against that particular carve-out list, not assumed to match the hourly-employee rate. The CRS report on this topic (R48921) is a useful starting point for the state-by-state details.