SHIFT PAY GUIDE
What Is Shift Differential? Rates, Examples & How to Calculate It
Updated August 27, 2026 · First published August 13, 2026
Shift differential is extra pay for working hours most people don't want to work — evenings, nights, weekends, and holidays. It's not required by federal law; it's an incentive employers use to staff hard-to-fill shifts. If you work nights in a hospital, a plant, a warehouse, or a 24/7 call center, differential pay is probably a meaningful slice of your paycheck — and the part most likely to be calculated wrong.
How shift differential works
A differential is added on top of your base hourly rate for the hours you work inside a defined window. It comes in two flavors: a flat dollar amount (for example, +$4.00/hour for hours between 7 PM and 7 AM) or a percentage of your base rate (for example, +15% for night hours).
The key detail: the differential applies to the hours actually worked in the window, not to the whole shift. If your shift runs 6 PM to 6 AM and the night window starts at 7 PM, the first hour pays base rate and the remaining eleven pay base + differential. Overnight shifts split across midnight — each hour lands where it lands. Some employers simplify with a majority-of-hours rule (if most of the shift is in the window, the whole shift gets it); check which rule yours uses, because it changes what a 6 PM start is worth.
Typical differential rates
There's no legal standard, but across US employers the common ranges are:
- —Evening (2nd) shift: $0.50–$2.00/hr, or 5–10% of base
- —Night (3rd) shift: $2.00–$7.00/hr, or 10–20% of base
- —Hospital nursing nights: commonly $3.00–$8.00/hr, with some systems paying 15–25%
- —Weekend differential: $1.00–$5.00/hr, often stackable with night differential
- —Charge/preceptor add-ons (nursing): $1.00–$2.50/hr on top of everything else
Differential vs. premium vs. bonus
The words get used loosely, and payroll treats them differently. A differential is tied to when you work: a rate bump for hours inside a window. A premium is tied to a condition: holiday premium, hazard pay, on-call or call-back premium, charge premium. A bonus is tied to a result or an event: a sign-on bonus, an attendance bonus, a pickup bonus for grabbing an open shift.
The distinction matters for one reason — overtime. Differentials and most premiums must be folded into your regular rate before overtime is calculated. Discretionary bonuses (the employer decides after the fact whether to pay one) can be excluded; non-discretionary bonuses promised in advance, including most shift-pickup incentives, cannot.
How differential stacks with overtime
This is where paychecks go wrong. Under the FLSA, overtime is 1.5× your regular rate of pay — and the regular rate must include shift differentials. If your base is $30 and you averaged $2.50/hr in differentials that week, your overtime hours pay 1.5 × $32.50, not 1.5 × $30.
If your employer computes OT on base rate alone, each OT hour underpays you by half the differential. Over a year of regular overtime that's real money, and it's the single most common payroll error night workers find when they finally check.
How it shows on a paystub
Most payroll systems break differential out as its own line: 'Shift Diff', 'Night Prem', 'SD2/SD3', or a code like 'DIFF-N'. You'll see hours and a rate next to it — the hours should match the hours you worked inside the window, and the rate is the add-on, not your full rate. Percentage differentials often show as a dollar figure with the percentage buried in the rate column.
Three things to check every pay period: the differential hours (do they match the hours in the window, including the post-midnight hours of overnight shifts?), the differential rate (did a raise to your base update a percentage differential?), and the overtime rate (is it 1.5× a rate that already includes the differential, or 1.5× base?). If the OT line shows exactly 1.5 × your base, the differential is being left out.
State and federal-employee rules
No state requires a shift differential for private-sector workers either, but a few rules touch it. California, Alaska, Nevada and Colorado have daily overtime, and the differential feeds the daily OT rate the same way it feeds weekly OT. State prevailing-wage and public-contract rules sometimes specify differentials for certain trades. Union contracts nearly always lock the differential to a fixed dollar amount or percentage and define the window to the minute.
Federal employees are the exception where differential is law: General Schedule employees earn a 10% night differential for regularly scheduled work between 6 PM and 6 AM (5 U.S.C. 5545), Federal Wage System employees earn 7.5% for second shift and 10% for third, and Sunday premium pay adds 25% for regularly scheduled Sunday hours.
Calculating your differential pay: a worked week
For a single shift: count the hours inside the differential window, multiply by the differential, add your base pay. For a week with overtime: compute base pay + all differential pay, divide by total hours to get your regular rate, then pay the half-time premium on that rate for hours past 40. Here's a 48-hour week at $30 base with a $4 night differential on 30 of the hours:
| Line | Amount |
|---|---|
| Base pay: 48 h × $30.00 | $1,440.00 |
| Night differential: 30 h × $4.00 | $120.00 |
| Regular rate (all straight-time pay ÷ 48 h) | $32.50 |
| Overtime premium: 8 h × ½ × regular rate | $130.00 |
| Week total | $1,690.00 |
| Overtime premium if computed on base only | $120.00 |
| Underpaid this week | $10.00 |
Computed with the same math as the calculator below. $10.00 a week is $520.00 a year on this schedule — and it scales with the differential and the overtime.
Or let the calendar do it
The free differential calculator does the stacking for one shift or one week; the ShiftCheck app does it for every shift you paint, hour by hour, with weekly overtime on the differential-included rate.
DO THE MATH FOR YOUR NUMBERS
FAQ
Is shift differential required by law?
No. Federal law doesn't require differential pay — it's an employer incentive. But once paid, it must be included in your regular rate when calculating overtime under the FLSA.
Is shift differential taxed differently?
No. Differential pay is ordinary wages and is taxed exactly like your base pay. It can push your withholding up simply because you earned more.
Do salaried employees get shift differential?
Sometimes — many hospitals pay salaried and per-diem staff differentials — but it's less common than for hourly workers. Check your employer's compensation policy.
Does differential apply to my whole shift?
Usually only to the hours worked inside the differential window. A 6 PM–6 AM shift with a 7 PM window start earns differential on 11 of the 12 hours. Some employers use a majority-of-hours rule instead.
How do I know if my overtime rate includes the differential?
Divide the overtime rate on your paystub by 1.5. If the result equals your base rate exactly, the differential was left out of your regular rate, which the FLSA doesn't allow.
SHIFTCHECK FOR IPHONE
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