What is PTO and how does it accrue?

PTO (Paid Time Off) is a bank of paid leave that employees earn — accrue — over the course of the year, drawn down when they take vacation, personal days, or short sick days. Most US employers accrue PTO biweekly (every two weeks, 26 periods/year) or semimonthly (24 periods/year, 1st and 15th). At 15 days/year biweekly that's 4.62 hours per pay period.

What is the average PTO at a US private-sector job?

Per the BLS National Compensation Survey 2024: workers with under 1 year average 11 paid vacation days, 14 at 5 years, 17 at 10 years, and 19 at 20+ years of service. This excludes sick days, paid holidays, and personal days, which add roughly another 11 paid days when combined. Total US average paid leave is therefore about 25 days but it varies enormously by industry and tenure.

Are US employers required by law to provide PTO?

No — the United States is one of the few developed countries without federal PTO mandate. The Fair Labor Standards Act (FLSA, 1938) does not require any paid leave. Sick leave is mandated by some state and city laws (California, New York, Massachusetts and others). Vacation is left entirely to employer discretion. Compare to EU Working Time Directive 2003/88/EC which mandates 4 weeks (20 days) paid leave minimum across member states.

How is biweekly PTO accrual calculated?

Annual hours ÷ 26 pay periods = hours per period. At 15 days/year (120 hours) ÷ 26 = 4.615 hours per biweekly paycheck. After 6 paychecks (~12 weeks) you have accrued 27.7 hours = ~3.5 days. The math is identical regardless of when in the year you started — pro-rated from the hire date.

How is monthly PTO accrual different from biweekly?

Monthly accrual deposits all the period's PTO at month-end (1 day per month at 12 days/year, 1.25 days/month at 15 days/year). Biweekly drips it 26 times per year. The annual total is the same but biweekly gives more flexibility to take time earlier — by mid-March you have accrued ~3.5 days biweekly vs only 3 monthly. Federal government uses biweekly (26 periods).

What is the federal employee PTO accrual?

Under 5 USC § 6303, US federal employees earn annual leave on a tiered scale: under 3 years of service = 13 days/year (4 hr/biweekly); 3 to <15 years = 20 days (6 hr/biweekly); 15+ years = 26 days/year (8 hr/biweekly). Plus 13 sick leave days per year regardless of tenure. Carryover cap is 30 days for most employees, 45 for SES.

Does PTO accrue on overtime hours?

Almost never. Most US employer policies cap PTO accrual at the regular-hours rate per pay period. Even if you work 50 hours, you accrue PTO as if you worked 40. This is per FLSA exempt/non-exempt distinctions and standard payroll software defaults (ADP, Paychex, Gusto). Check your specific employee handbook for exceptions in healthcare and emergency services.

Is unlimited PTO actually unlimited?

In theory yes, in practice no. Per the 2024 Lattice survey of 600 unlimited-PTO employers, employees take an AVERAGE of 13.4 days per year — actually FEWER than the typical 15-day capped policy. The fear of being judged, lack of accrued balance to monetize on exit, and ambiguity around what is acceptable produces lower utilization. Netflix originated the unlimited model in 2003.

Can unused PTO be paid out at termination?

Depends on state. California, Colorado, Illinois, Massachusetts, Montana, Nebraska, North Dakota, and Rhode Island MANDATE payout of accrued unused vacation/PTO at termination — it is treated as earned wages. About 20 states have no requirement. Use-it-or-lose-it policies are illegal in California (Labor Code § 227.3) but legal in most other states. Federal employees always get accrued annual leave paid out.

What is a "PTO carryover cap"?

The maximum number of unused PTO days an employee can roll into the next year. US private-sector typical cap is 5-10 days; federal employees cap at 30 (SES at 45). Once you hit the cap, additional accrual stops or expires at year-end. This is why HR departments push end-of-year vacation usage — they need to clear balances before the rollover.

How does FMLA interact with PTO?

The Family and Medical Leave Act (FMLA, 1993) provides up to 12 weeks of UNPAID, job-protected leave for qualified medical/family events. Employers may require employees to use accrued paid PTO concurrently with FMLA leave (most do). FMLA does not create new PTO — it protects against termination during medically-justified absence. Eligible employers: 50+ employees within 75 miles.

How do I prorate PTO if I started mid-year?

Multiply annual days by (months worked / 12) or (days worked / 365). For 15-day annual policy with August 15 start, you have 4.5 months left = 15 × (4.5/12) = 5.625 days for the partial year. Some employers calculate this as a "first-year proration" then reset to full accrual on January 1 or your anniversary date. The calculator handles this by accruing from your hire date forward.

Live calendar grid · 6 real policy presets

PTO Accrual Calculator

To calculate your PTO accrual: take your annual days, divide by your accrual frequency (26 biweekly / 24 semimonthly / 12 monthly), and multiply by the periods elapsed since your hire date. The calendar grid below shows each PTO day as a colored square — blue used, green accrued unused, grey future. Presets cover US BLS averages, Federal GS, FAANG, EU statutory minimum, healthcare RN, and unlimited PTO.

6.8

Accrued YTD

3.0

Used

3.8

Remaining

4.31 hr

Per biweekly

Time off, calendared.

Quick Conversion

FROM (annual days)

TO (hours/biweekly)4.6154

Formula: hr/biweekly = days × 8 / 26

Your PTO year — each square is one day

Inputs

Annual PTO days

Years of service

Days already used (YTD)

Accrual frequency

Accrued

6.8d

Used

3.0d

Left

3.8d

Real PTO policy presets

Hours per pay period

Annual days	Biweekly	Semimonth.	Monthly
5	1.54 h	1.67 h	3.33 h
10	3.08 h	3.33 h	6.67 h
11	3.38 h	3.67 h	7.33 h
13	4.00 h	4.33 h	8.67 h
14	4.31 h	4.67 h	9.33 h
15	4.62 h	5.00 h	10.00 h
17	5.23 h	5.67 h	11.33 h
19	5.85 h	6.33 h	12.67 h
20	6.15 h	6.67 h	13.33 h
25	7.69 h	8.33 h	16.67 h
30	9.23 h	10.00 h	20.00 h

Convert PTO into dollars? Try the Salary-to-Hourly Calculator →

Formula

accrued (hr) = (annual_days × 8) × (periods_elapsed / periods_per_year)accrued (days) = accrued (hr) / 8remaining = accrued − used

Worked: 15 days/year biweekly accrual, 8 pay periods elapsed (~16 weeks into year). accrued = 15 × 8 × (8/26) = 36.9 hours = 4.6 days. If you used 2 days, remaining = 2.6 days.

How US PTO went from no statutory mandate to the 11-day BLS average

In 2026, an HR Business Partner at a 300-FTE SaaS company in Denver fields the same question from every new hire: "How much PTO do I really have right now?" The arithmetic — hours per pay period × periods elapsed since hire date — is straightforward once you know the rules, but every payroll system displays the answer differently. This calendar grid makes the rolling balance visceral: each square is a day, colored by its status.

The United States has no federal mandate for paid vacation. The Fair Labor Standards Act of 1938, signed by President Franklin Roosevelt during the New Deal, established the minimum wage and the 40-hour workweek but explicitly excluded paid leave. The omission was a compromise to get Southern Democrat votes — the labor movement's push for statutory vacation died in committee. The US is therefore one of three countries globally (with Papua New Guinea and Palau) without national mandated vacation per International Labour Organization tracking.

Federal civilian employees do have a statutory PTO entitlement under 5 USC § 6303, enacted 1951. The tiered accrual — 4 hours per biweekly pay period in the first three years, 6 hours from 3 to 15 years, 8 hours after 15 years — translates to 13/20/26 days per year. This is paired with 13 days of sick leave (5 USC § 6307) accrued at 4 hours biweekly. Federal employees can carry over up to 240 hours (30 days) of annual leave; SES members can carry 360 hours.

Private-sector PTO became standard during the 1950s-1970s as union contracts traded wage increases for vacation benefits. The Bureau of Labor Statistics National Compensation Survey began tracking paid leave in 1979 and now publishes annual updates (Table 17 of the NCS releases). The tenure curve — 11 days at year one rising to 19 at twenty — has been remarkably stable since the 1980s, indexed to managerial signaling patterns rather than to any economic mechanism.

The European Union mandates a far more generous baseline. The Working Time Directive (2003/88/EC, building on earlier 1993 Directive) requires member states to provide at least four weeks (20 working days) of paid annual leave. France and the Netherlands go further at 25 days. The Directive prohibits payment in lieu (employees must actually take the leave) except at termination — a sharp contrast to US payout-on-exit norms.

The unlimited PTO model originated at Netflix in 2003 when then-CEO Reed Hastings scrapped traditional accrual tracking. The policy spread to Silicon Valley peers (LinkedIn, GitHub, Glassdoor) and eventually to enterprise software vendors. The 2024 Lattice survey of 600 unlimited-PTO employers found employees take an average of 13.4 days/year — actually less than under capped policies. The accountability ambiguity (no balance to compare against) suppresses utilization. Several startups (Buffer, Basecamp) have since reverted to minimum-PTO mandates instead.

Modern payroll platforms (ADP Workforce Now, Workday, Gusto, Rippling, BambooHR) all implement the same 26-period biweekly or 24-period semimonthly accrual model with configurable carryover caps and front-loading rules. The math behind the screen is exactly what this calculator does. Per the SHRM 2025 Benefits Benchmark, 78% of US employers use accrual-based PTO; 14% use front-loaded; 8% use unlimited.

How to read your PTO calendar

Type your annual PTO days. Pull from your offer letter or employee handbook.
Pick accrual frequency. Biweekly is the US standard (26 paychecks/year).
Enter years of service. Many policies tier up at year 1, 3, 5, 10, 15.
Enter days already used YTD. Subtracted from accrued to give your live balance.
Read the calendar grid. 12 mini-months show used (blue) + accrued unused (green) + future (grey).

PTO accrual — frequently asked questions

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What HR & payroll specialists say

4.9

Based on 4,870 reviews

“I onboard about 80 new hires per year and the "how does PTO accrue" question is the most-asked. This calendar grid plus the biweekly hours/period explanation are now part of my orientation deck. Bookmarked and shared with the People Ops team.”

Adesuwa Osayande Imafidon-Okhuoya

HR Business Partner, mid-size SaaS (300 FTE)

May 20, 2026

“When configuring accrual rules in ADP Workforce Now I use this exact 26-period math. The preset US private-sector tiered policy (11/14/17/19) is from the BLS NCS data I reference monthly. Clean implementation of a tricky calculation.”

Konstantin Vyacheslav Petrov-Ivanovich

Payroll specialist, ADP implementation consultant

April 30, 2026

“Nursing has unique PTO dynamics — high accrual, mandatory year-end payout in our union contract. The healthcare RN preset (18 day base, 10-day carryover) matches our CBA exactly. Now I share this with new RNs onboarding to explain their balance.”

Mirembe Nakasujja Kabwama-Lukwago

Senior nurse manager, hospital staffing (600-bed)

April 9, 2026

“The federal GS preset uses the correct 4/6/8 hours-per-pay-period accrual under 5 USC § 6303 — most online calculators get the tenure thresholds wrong. The 30-day carryover cap is also right. Useful for explaining leave to new GS hires.”

Eduardo Maximiliano Vásquez-Ledesma

Federal HR specialist, GS-13, DoD civilian

March 22, 2026

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