Nurse overtime & shift differential calculator
Nurse overtime must be paid at 1.5× your regular rate, which federal law requires to include night and weekend shift differentials — not your base rate alone. If your employer uses the hospital 8/80 system, you also earn overtime for hours past 8 in a day, so three 12-hour shifts produce 12 overtime hours even though the week totals only 36. This calculator applies both rules to your own numbers.
Your estimated gross pay
$83,030
per year · $1,730/week gross, before taxes
- Hours / week
- 36
- Overtime hours
- 0
- Regular rate
- $48/hr
- Overtime rate
- $72/hr
- Differential pay
- $218/wk
- Overtime pay
- $0/wk
Under the 8/80 system, this same schedule would pay $96,869 (+$13,838).
- Annualized at 48 worked weeks (1728 hours/year), not 2,080.
- This schedule generates no overtime under a 40-hour workweek. If your employer uses the 8/80 system, the same schedule may.
Why overtime is not 1.5× your base rate
The Fair Labor Standards Act sets overtime at one and one-half times an employee’s regular rate of pay. The regular rate is not the same thing as the base rate on your offer letter. It is the average straight-time rate you actually earned, computed as total straight-time earnings divided by total hours worked.
That distinction matters for nurses because shift differentials are explicitly part of it. The governing regulation, 29 CFR 778.207, requires including “such extra premiums as nightshift differentials” in the regular rate. Weekend and hazardous-duty premiums are treated the same way.
So a nurse earning $40/hour base with a $5/hour night differential has a regular rate of $45/hour and an overtime rate of $67.50/hour — not $60/hour. On eight overtime hours a week across 48 worked weeks, that difference is roughly $960 a year. If your paycheck computes overtime from the base rate alone, that is worth raising with payroll.
The 8/80 rule, and why 12-hour shifts change everything
Most employers owe overtime after 40 hours in a workweek. Hospitals and residential care establishments have a second option under FLSA section 7(j): a fixed, recurring 14-day work period in which overtime is owed for hours beyond 8 in a day or 80 in the period.
For nurses on 12-hour shifts the two systems produce very different paychecks. Three 12s is 36 hours — under a 40-hour workweek, no overtime at all. Under 8/80, each shift runs 4 hours past the daily threshold, so the same schedule yields 12 overtime hours every week.
Neither system is automatically better; 8/80 rewards long shifts, while a 40-hour workweek rewards picking up a fourth or fifth shift. An employer may only use 8/80 where there is a prior agreement with the employee, and may not apply both systems to the same person. Your offer letter or HR can tell you which one governs your pay.
What this calculator does not do
- It does not publish differential rates. Night and weekend differentials are set employer by employer and are not measured in any authoritative national dataset, so you supply your own. We will not invent a number here.
- It shows gross pay, not take-home. Federal, state, and FICA withholding and benefit deductions all reduce the deposited amount.
- It does not model state overtime law. Several states — California most notably — require daily overtime beyond federal rules, which can pay more than the figures here.
- It assumes a steady schedule. Real weeks vary; the annual figure multiplies one typical week by the worked weeks you enter.
This is general information about published federal wage rules, not legal or tax advice. For a specific pay dispute, the U.S. Department of Labor Wage and Hour Division is the authoritative source.
Put the number in context
Gross pay only tells you what a schedule is worth. To judge whether the underlying rate is competitive, compare it against measured wage data for your role and market — see nurse salary by the numbers or your state’s pay page.
Overtime and differential FAQ
- Is nurse overtime paid on the base rate or on shift differentials too?
- On both. The FLSA requires overtime to be paid at 1.5 times your "regular rate," and 29 CFR 778.207 explicitly lists nightshift differentials among the premiums that must be included in that rate. If you earn $40/hour base plus a $5/hour night differential, your overtime rate is based on $45/hour — not $40. Paychecks that apply overtime to the base rate alone underpay you.
- What is the 8/80 rule for nurses?
- Section 7(j) of the FLSA lets hospitals and residential care facilities use a fixed 14-day work period instead of the 40-hour workweek. Under this "8 and 80" system you earn overtime for hours worked beyond 8 in a day or 80 in the 14-day period. It matters a lot for 12-hour shifts: three 12s is 36 hours and generates no overtime under a 40-hour workweek, but generates 12 overtime hours under 8/80. Employers may only use 8/80 if there is a prior agreement with the employee.
- Do three 12-hour shifts qualify for overtime?
- It depends entirely on which overtime system your employer uses. Under the standard 40-hour workweek, 36 hours is below the threshold, so no overtime is owed. Under the 8/80 system, each 12-hour shift produces 4 hours over the daily 8-hour threshold, so the same schedule produces 12 overtime hours per week. Check your offer letter or ask HR which system applies to you.
- Does this calculator show take-home pay?
- No. It calculates gross pay — what you earn before taxes and deductions. Federal, state, and FICA withholding, plus health insurance and retirement contributions, all reduce what actually lands in your account. Gross pay is the right number for comparing offers, differentials, and schedules, which is what this tool is for.
- Are the differential amounts here real market data?
- No — the differential fields are yours to fill in. This tool does not publish or assume differential rates, because they are set employer by employer and are not measured in any authoritative national dataset. It applies published federal overtime rules to the numbers you enter.