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FMLA Rolling 12-Month Leave Calculator

Calculate FMLA hours used and remaining under the rolling-backward 12-month method for a requested leave date.

Safety & HR standard: 29 CFR 825.200 rolling-backward method

Leave Inputs

Enter the requested leave date, the employee's standard workweek, and prior FMLA usage by date.

The calculator looks back 12 calendar months from this date.
12 workweeks x 40 hours = 480 hours by default.
Prior FMLA usage
Date used FMLA hours Remove row

Results

FMLA entitlement is calculated as 12 workweeks, with 480 hours for a 40-hour workweek.

Used in Window
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Hours Remaining
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Weeks Remaining
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Next Replenishment
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Usage Counted in the Rolling Window

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Calculator Self-Tests

Runs golden tests for the rolling-window sum, 12-workweek entitlement, and next replenishment date.

About the FMLA Rolling 12-Month Leave Calculator

HR teams, leave administrators, and managers use an FMLA rolling calendar calculator to track available job-protected leave under the rolling 12-month method. Enter prior FMLA usage, current request dates, work schedule, and hours to estimate remaining entitlement. It helps prevent over-approving leave or denying time that remains available under the employer's selected method.

How it works

  1. Confirm that the employer uses the rolling 12-month look-back method.
  2. Enter the employee's normal weekly schedule and FMLA entitlement basis.
  3. Add FMLA hours or weeks used during the prior 12 months.
  4. Subtract prior usage from the available entitlement for the new request.
  5. Document the calculation with dates, hours, and leave reason category.

Frequently asked questions

How does the rolling 12-month FMLA method work?

Under the rolling look-back method, the employer measures FMLA leave used during the 12 months immediately before the new leave date. That prior usage is subtracted from the employee's available entitlement.

Is FMLA always 480 hours?

No. 480 hours is a common conversion for a 40-hour schedule over 12 workweeks. Employees with different schedules should have entitlement converted based on their normal workweek.

Can an employer choose a different FMLA year method?

Yes. FMLA regulations allow several 12-month leave-year methods, but the employer must apply the chosen method consistently and follow notice rules before changing methods.

How is intermittent FMLA leave counted?

Intermittent leave is counted in the smallest increment the employer uses for other leave, subject to FMLA limits. The deducted amount should reflect the employee's actual missed work time.

Does this calculator determine FMLA eligibility?

No. Eligibility also depends on employer coverage, worksite rules, months of service, hours worked, qualifying reasons, certification, and other FMLA requirements.

References