Intermittent FMLA Hours: Why 480 Hours Is Not the Universal Answer
August 21, 2026
The shortcut “FMLA = 480 hours” is only correct for a particular schedule: 12 workweeks multiplied by a normally scheduled 40-hour workweek.
Department of Labor guidance states that the employee’s actual workweek is the basis for FMLA entitlement. If a worker is normally scheduled for 50 hours per week, DOL’s own example produces 600 hours for a 12-workweek entitlement.
The free Intermittent FMLA Leave Hours & Evidence Ledger is built around that schedule-aware math.
The basic conversion
For a standard 12-workweek entitlement:
normally scheduled hours per week × 12 = hourly equivalent
Examples:
| Normal schedule | 12-workweek equivalent |
|---|---|
| 30 h/week | 360 h |
| 36 h/week | 432 h |
| 40 h/week | 480 h |
| 45 h/week | 540 h |
| 50 h/week | 600 h |
For qualifying military caregiver leave, the entitlement can be up to 26 workweeks in a single 12-month period, so the tool supports that separate entitlement type rather than forcing everything into 12 weeks.
Mandatory overtime can matter
DOL guidance focuses on total normally scheduled hours. If overtime is normally required as part of the schedule, a simplistic 40-hour setting may understate the workweek used for conversion.
The GentleTools ledger therefore asks for the real normal schedule instead of pre-filling 40 and hiding the assumption.
Intermittent leave is proportional to the actual workweek
When leave is taken for less than a full workweek, DOL says the amount used is determined as a proportion of the employee’s actual workweek.
A schedule-aware ledger should therefore store:
- date;
- hours or fraction of shift missed;
- scheduled hours for that day where relevant;
- qualifying reason/certification reference;
- amount the employer charged;
- amount independently calculated;
- discrepancy.
The leave-year method matters too
Employers can use different FMLA 12-month methods where permitted, including calendar year, fixed 12-month year, 12 months measured forward and a rolling 12-month period measured backward.
A balance that ignores the employer’s method can be wrong even if every individual absence is entered correctly.
The Intermittent FMLA Leave Ledger therefore records the method and uses it when presenting the working balance.
Track employer balance snapshots
Whenever HR or the leave administrator tells you a remaining balance, record:
- date;
- balance stated;
- source;
- leave-year method they say they use;
- screenshot, letter or portal statement if you lawfully have it.
Then compare it with your independent ledger.
The point is not to automatically declare the employer wrong. It is to make a discrepancy visible while there is still time to ask how it was calculated.
Certification and designation markers
Current DOL guidance generally gives an employee at least 15 calendar days after an employer’s request to provide medical certification, subject to circumstances and good-faith efforts.
DOL also generally requires eligibility and designation notices within five business days at relevant stages of the process, absent specified circumstances.
The tool uses these as planning markers, not as automatic legal conclusions.
FAQ
Is everyone eligible for 12 weeks of FMLA?
No. Eligibility and coverage requirements apply. The tool has a screening section but does not make a binding eligibility determination.
Does 480 ever make sense?
Yes — for 12 workweeks at 40 normally scheduled hours per week. It is not a universal constant.
Can my employer use a different leave-year method from another employer?
Yes. The employer’s selected method matters. Record it rather than assuming calendar year.
Use the Intermittent FMLA Leave Hours & Evidence Ledger to calculate from your real schedule and keep the employer’s balance beside your own.