What the 8/80 Rule Actually Is
Under the Fair Labor Standards Act, most employers must pay overtime when an employee works more than 40 hours in a 7-day workweek. FLSA §207(j) carves out a special rule for hospitals and residential care establishments: with the employee's prior agreement, they can use a 14-day work period instead.
Under this 14-day period — commonly called the "8/80 rule" — overtime is triggered in two ways:
- More than 8 hours in a single day, OR
- More than 80 hours across the 14-day period
Why 8/80 Matters for 12-Hour Shifts
Most hospital nurses work three 12-hour scheduled shifts per week — 36 scheduled hours, or about 34.5 worked hours after a standard 30-minute unpaid break. Under standard weekly OT rules, that's zero overtime: you never crossed the 40-hour line.
Under 8/80, each 12-hour scheduled shift generates roughly 3.5 to 4 hours of daily overtime (the worked hours above 8, depending on your break length). Over a 14-day period of six 12-hour shifts, that's 21 to 24 hours of daily OT — even though you never came close to 80 hours.
When 8/80 Helps You — and When It Doesn't
8/80 generally pays more when you work long shifts (more than 8 hours) but fewer total hours per period. The three-12 nurse comes out ahead every time.
Standard weekly OT pays more when you work many shorter shifts adding up to high totals — for example, six 8-hour shifts in a single week (48 hours) generates 8 hours of weekly OT, but zero daily OT and (if the second week is light) no period OT either.
Differentials Still Count Toward the Blended Rate
A common payroll error: employers calculating 8/80 overtime as 1.5× the *base rate* instead of 1.5× the *blended regular rate*. Under FLSA §778, the regular rate is total straight-time earnings ÷ total hours worked, including shift differentials. See our FLSA Blended Overtime guide for the full math.
For the 8/80 calculation, the blended rate is computed over the entire 14-day period, not weekly.
The Prior Agreement Requirement
Your hospital cannot unilaterally switch you to the 8/80 rule. Section 207(j) requires a prior agreement between the employer and the employee — and the agreement must be in place *before* the work is performed. If you signed an offer letter or employment agreement that mentioned a 14-day period, that typically satisfies the requirement.
Common 8/80 Paycheck Mistakes
- Daily OT counted toward the 80-hour threshold twice. Hours already paid at OT for being over 8 hours/day should not also count toward the >80 hours/period OT trigger — that would be double-counting.
- Period OT calculated on base rate. As above, FLSA blended-rate rules apply.
- Weekend or differential hours dropped from the blended-rate denominator. Differential earnings are part of straight-time. They go in the numerator; the differential hours go in the denominator.
- 8/80 applied without a prior agreement. If your hospital is using 8/80 retroactively or without your signed agreement, you may be entitled to standard weekly OT for that period.
Run Your Schedule Through the Calculator
Plug your real 14-day schedule into our 8/80 Overtime Calculator to see what your gross should look like under the rule — and how it compares against standard weekly overtime, which is the headline answer most nurses are looking for.