Shift Differential Pay Calculator
Add a night, evening, or weekend shift premium (percent or flat dollar) and get FLSA-correct overtime on the blended regular rate. Free, no signup.
Shift Differential Pay Calculator
Base rate and hours
Regular plus differential hours are your straight-time hours. Put any hours over 40 in the Overtime field.
Shift differential
The effective overtime rate is 1.5 times the blended regular rate. It includes the shift differential, so it lands above 1.5 times the base rate whenever differential hours are worked.
What is shift differential pay?
Shift differential pay is extra money for working shifts most people would rather skip: nights (second and third shift), evenings, weekends, holidays, and on-call coverage. It is paid on top of the base hourly rate for the hours worked on the qualifying shift, and it is how an employer makes harder-to-staff hours worth taking.
Employers structure a differential one of two ways. A percent differential adds a share of the base rate (10% on a $20 rate is $2.00 per hour). A flat-dollar differential adds a fixed amount per hour ($2.00 per hour, regardless of the base rate). Night differentials commonly run about 5% to 15%, or roughly $1 to $3 per hour, with 10% the most common. Weekend and holiday rates are often set higher.
How to calculate shift differential pay (with examples)
Start with the premium per hour, then apply it to the qualifying hours:
- Percent method: premium = base rate times the percent. $20 at 10% = $2.00 per hour.
- Flat-dollar method: premium = the fixed amount. $2.00 per hour.
- Total differential: premium times differential hours. $2.00 times 8 hours = $16.00.
Take a week with no overtime: $20 base, 32 day-shift hours, and 8 night hours at a 10% differential. Base pay is $20 times 40 hours = $800.00, the differential premium is $16.00, and straight-time earnings come to $816.00. The night-shift rate itself is $22.00 per hour ($20 base plus the $2.00 premium).
Now add 5 overtime hours to that week (45 total hours). Base pay becomes $20 times 45 = $900.00, the differential premium is still $16.00, and straight-time earnings are $916.00. The overtime piece is handled below, because it depends on the blended rate rather than the base rate.
Shift differentials and FLSA overtime: the blended regular rate
This is where most free calculators get it wrong. A shift differential is part of the "regular rate" under the Fair Labor Standards Act, so overtime is 1.5 times the blended (weighted-average) rate, not 1.5 times the base rate. 29 CFR 778.207(b) is explicit: nightshift differentials, "whether they take the form of a percent of the base rate or an addition of so many cents per hour," must be included in the regular rate before overtime is computed, and no part of the differential may be credited toward the overtime pay owed.
The blended regular rate is total straight-time pay divided by total hours worked in the week (29 CFR 778.109 and 778.115). Using the 45-hour example: $916.00 divided by 45 hours = $20.3556 per hour. Every hour is already counted at straight time in base pay, so overtime adds the extra half: 0.5 times $20.3556 times 5 hours = $50.89. Total weekly gross is $916.00 plus $50.89 = $966.89.
Compare the common shortcut of 1.5 times the base rate: 1.5 times $20 times 5 = $150.00 of overtime value, which understates the overtime because it ignores the differential baked into the regular rate. When no differential hours are worked, the blended rate collapses back to the base rate and this tool matches a plain overtime pay calculation exactly.
From gross to take-home
Shift differential is regular taxable wages: it is subject to federal and state income tax and FICA, just like base pay. This page stops at gross. To turn the gross into net take-home, use the Hourly Paycheck Calculator, and to total the raw hours that feed this tool, the Timesheet Hours Calculator adds them up. When you need to run differentials across a whole crew, the Multi-Employee Payroll Calculator and the full Payroll Calculator app handle per-employee net pay and employer-side taxes with decimal-precise math.
Frequently Asked Questions
Common questions about shift differential pay calculator
What is shift differential pay?
Shift differential pay is extra pay for working less desirable shifts, such as nights (second or third shift), evenings, weekends, holidays, or on-call. It is added on top of the base hourly rate for the hours worked on the qualifying shift. Employers set it either as a percent of the base rate or as a flat dollar amount per hour.
How do you calculate shift differential pay?
Pick a structure first. For a percent differential, multiply the base rate by the percent (for example, $20 base at 10% adds $2.00 per hour). For a flat-dollar differential, add the fixed amount (for example, $2.00 per hour). Then multiply that premium by the hours worked on the qualifying shift to get the total differential earned. The differential shift rate is the base rate plus the premium.
Is shift differential included when calculating overtime?
Yes. Under the FLSA, a shift differential is part of the "regular rate," so overtime is 1.5 times the blended rate, not 1.5 times the base rate. 29 CFR 778.207(b) states the differential must be included in the regular rate before overtime is computed, and no part of it may be credited toward the overtime obligation. The Overtime Pay Calculator covers the same blended-rate math.
How is the blended (regular) rate calculated for overtime?
The blended regular rate is total straight-time pay divided by total hours worked in the workweek (29 CFR 778.109 and 778.115). Add base pay for every hour plus the differential premium, then divide by all hours worked. Overtime hours get an extra half of that blended rate on top of the straight-time value already counted, which equals 1.5 times the blended rate per overtime hour.
What's the difference between percentage and flat-dollar shift differentials?
A percentage differential scales with the base rate, so it rises automatically when the worker gets a raise (10% of $20 is $2.00; 10% of $25 is $2.50). A flat-dollar differential stays fixed regardless of the base rate ($2.00 per hour is always $2.00). Both are valid under the FLSA and both fold into the regular rate for overtime.
What is a typical shift differential rate?
Typical night differentials run about 5% to 15% of the base rate, or roughly $1 to $3 per hour, with 10% the most common. Weekend and holiday differentials are often higher. The exact rate is set by the employer or a collective bargaining agreement, so check your pay policy for the figure that applies to your shift.
Is shift differential pay taxable?
Yes. Shift differential is regular taxable wages, subject to federal and state income tax and FICA (Social Security and Medicare), the same as base wages. This tool computes gross pay only. To turn the gross into take-home, use the Hourly Paycheck Calculator or model full net pay in the Payroll Calculator app.
Does shift differential apply to overtime hours themselves?
The differential is earned only on hours actually worked on the qualifying shift, so it applies to an overtime hour only if that hour is worked on the differential shift. Either way, the differential paid during the week must be included in the regular rate for that week, which is what raises the overtime rate above 1.5 times the base rate.