Annual leave accrual is the way you earn paid time off gradually as you work, rather than receiving a full year’s worth on day one. In the private sector, federal law sets no minimum, so how fast you earn, whether your balance is capped, whether unused hours roll over, and whether you get paid for what’s left when you leave all come down to your employer’s written policy and your state’s wage laws.1U.S. Department of Labor. Vacation Leave Federal employees earn on a fixed statutory schedule that starts at 4 hours per biweekly pay period and rises with years of service.2Office of the Law Revision Counsel. 5 USC 6303 – Annual Leave; Accrual
How You Earn Leave in the Private Sector
Private employers rarely hand you a full year of vacation on January 1. You accumulate hours across the year, and the rate usually depends on two things: your employment status and how long you’ve been there. Full-time employees almost always accrue faster than part-timers, who typically earn on a pro-rated basis tied to actual hours worked. Many employers also use tiered schedules that reward longevity: two weeks a year to start, three at the five-year mark, four at ten. The specific tiers are up to the employer unless a union contract or state law says otherwise.
The math itself falls into three common patterns.
Per Hour Worked
Common for hourly and part-time employees. You earn a set fraction of paid leave for every hour you work. One hour of PTO for every 40 hours worked, for example, is an accrual rate of 0.025 hours per hour. Your balance directly reflects the time you’ve put in, but it fluctuates with your schedule.
Per Pay Period
Full-time salaried employees often earn a fixed number of hours each pay period. Someone entitled to 120 hours a year and paid biweekly accrues about 4.62 hours across each of the 26 pay periods. Predictable, regardless of small schedule changes.
Monthly or Quarterly Grants
Some employers credit the annual allotment in monthly or quarterly chunks. A 120-hour annual policy might deposit 10 hours on the first of each month. It looks like a lump sum but is technically earned month by month. If you start mid-year or leave before year-end, you’re entitled only to the pro-rated portion you actually accrued.
Accrual Caps and Rollover Limits
Two different limits can quietly stop your balance from growing, and employers sometimes blur them.
An accrual cap is a ceiling on your total balance at any moment. A cap of 80 to 160 hours is typical. Hit the ceiling and you stop earning until you take some leave and bring the balance down. Employers use caps to avoid carrying a large unused-leave liability, but if you’re near the cap and don’t schedule time off, you’re leaving earned benefits on the table.
A rollover limit is different: it restricts how many hours you can carry from one calendar year into the next. An employer might let you accumulate up to 200 hours during the year but only roll 80 hours into January, with the difference forfeited at year-end. Whether either restriction is enforceable depends on your state.
Federal Employee Accrual Rates
Federal civilian employees earn annual leave under a statutory schedule tied to years of service, with increases at two thresholds:
- Less than 3 years of service: 4 hours per biweekly pay period, totaling 13 days (104 hours) per year.
- 3 to 14 years of service: 6 hours per biweekly pay period, plus an extra 4 hours in the final pay period, totaling 20 days (160 hours) per year.
- 15 or more years of service: 8 hours per biweekly pay period, totaling 26 days (208 hours) per year.
Senior Executive Service members and equivalent senior-level employees earn at the top rate of 8 hours per pay period regardless of years of service.2Office of the Law Revision Counsel. 5 USC 6303 – Annual Leave; Accrual Part-time federal employees accrue on a pro-rated formula based on hours in a pay status.3U.S. Office of Personnel Management. Annual Leave
Federal employees stationed in the U.S. can carry a maximum of 30 days (240 hours) from one leave year to the next. Anything above that at year-end is forfeited unless a specific exception applies. Employees stationed overseas may carry up to 45 days, and SES members up to 90 days.3U.S. Office of Personnel Management. Annual Leave
Federal employees who separate from service are entitled by law to a lump-sum payment for all accumulated and accrued annual leave, calculated as if they had remained employed through the period the unused leave would have covered.3U.S. Office of Personnel Management. Annual Leave
Can Your Employer Force You to Forfeit Unused Leave
Whether “use it or lose it” is enforceable depends entirely on your state. In several states, courts and statutes treat accrued vacation as earned compensation, the same as wages. Once you’ve earned it, the employer can’t take it back, and a policy that erases your balance on December 31 will not hold up. A smaller group of states prohibits use-it-or-lose-it by statute.
In the remaining states, the employer’s written policy generally controls. If the handbook says unused time is forfeited at year-end and you had notice, the term is usually enforceable. Read your handbook. The gap between keeping and losing a week of vacation can come down to a single paragraph you were handed on your first day.
Payout of Unused Leave When You Leave a Job
What happens to your balance at separation is one of the most common payroll disputes in employment law. States fall into three groups.
States That Require Payout
More than a dozen states require employers to pay out unused vacation at separation, whether the departure is voluntary or not. Accrued vacation is treated as earned wages. The employer must include the payout in the final paycheck or within the state’s timeline for final wages, and failing to pay is treated the same as failing to pay any other wages owed, which can trigger penalties and interest.
States Where the Employer’s Policy Controls
A larger group of states does not require payout by default but lets the written policy or contract decide. If the policy says unused time is forfeited at termination, that’s generally enforceable; if it promises a payout, the employer must honor it. Watch for one detail: some of these states will require payout if the employer has no written policy addressing the question, on the reasoning that silence creates an implied promise.
States That Exclude Vacation From Wages
A third group specifically excludes accrued vacation from the legal definition of wages. Employers there have no obligation to pay out unused time unless a contract or policy says otherwise. Even so, a written promise to pay is generally enforceable.
If Your Employer Won’t Pay
If your state requires payout and your former employer refuses, file a wage claim with your state’s department of labor. Most states offer an administrative process you can use without hiring a lawyer, and some allow recovery of penalties, interest, or attorney’s fees on top of the unpaid amount.
How FMLA Leave Can Drain Your Balance
The Family and Medical Leave Act entitles eligible employees to up to 12 weeks of unpaid, job-protected leave per year for qualifying reasons like a serious health condition or the birth of a child. The FMLA does not require your employer to pay you during that leave, but it does allow your employer to require you to use accrued paid vacation, personal, or sick leave concurrently with FMLA leave.4Office of the Law Revision Counsel. 29 USC 2612 – Leave Requirement
In practical terms, your employer can make you burn through your vacation bank before you switch to unpaid FMLA leave. You can also elect the substitution yourself if the employer doesn’t require it. Either way, the leave stays FMLA-protected, so your job and health benefits are preserved while your paid balance draws down.5U.S. Department of Labor. FMLA Frequently Asked Questions Many employees come back from FMLA leave with little or no vacation left for the rest of the year.
Tax Treatment of Leave Payouts
When your employer pays out accrued vacation, whether at separation or through a cash-out program, that money is wages for federal tax purposes. IRS regulations classify vacation allowances as wages subject to income tax withholding,6eCFR. 26 CFR 31.3401(a)-1 – Wages and the payout is also subject to Social Security and Medicare taxes.
Payouts at termination are typically classified as supplemental wages. Employers can withhold federal income tax on supplemental wages at a flat 22% rate instead of your regular withholding rate, which sometimes makes the payout look heavily taxed. It isn’t. Withholding is just a prepayment; your actual liability is settled when you file your return, and any overwithholding comes back as a refund.7Internal Revenue Service. Publication 15-A (2026), Employer’s Supplemental Tax Guide
If your employer offers a program that lets you cash out unused PTO during employment, the picture gets more complicated. Under the IRS constructive receipt doctrine, if you have an unrestricted right to convert leave to cash at any time, the full value may be taxable even before you actually take it. Employers that offer mid-year cash-outs usually build in restrictions or service charges to avoid that result.
Keep an Eye on Your Balance
Accrual errors are more common than most employees realize, especially where leave is tracked manually or on older payroll systems. Rounding differences, missed pay periods, and incorrect tier assignments can quietly erode your balance over time. Check the leave line on every pay stub. If your employer uses an online portal, verify that your accrual rate matches what your offer letter or handbook promises. Discrepancies are easier to fix within a pay period or two than when you discover a year-long error the week you try to book a two-week vacation.
Pay closest attention around transitions. If you’ve moved from part-time to full-time, been promoted into a new tier, or passed a service anniversary that should trigger a higher accrual rate, confirm the change actually took effect in payroll. That’s where most tracking mistakes happen.