Shift Premium Calculator
A shift premium is the extra pay employers offer for evenings, nights, weekends and holidays: the hours most people would rather not work. It is usually quoted as a percentage of your base rate or as a flat dollar amount per hour. This calculator takes either form, with one-tap presets for typical shifts, and shows the premium per hour, your total hourly rate and your total pay for the hours worked.
Quick presets (typical ranges; confirm your employer’s actual rate). Tapping one switches to percent mode and calculates straight away:
$0.00
Premium pay per hour: $0.00
Total hourly rate: $0.00
Gross pay before tax and deductions, for the hours entered only. The premium applies to every hour you enter; overtime, where it applies, is a separate calculation built on your regular rate.
Quick Answer
A 20% shift premium on a $22/hour base rate adds $4.40 per hour, taking the total hourly rate to $26.40 and a 10-hour shift to $264.00. In flat mode, a $2.50/hour differential on the same shift gives $24.50/hour and $245.00 total. Both versions are pre-filled and one tap away in the calculator above.
Key takeaways
- Percent mode: premium per hour = base rate × (premium % ÷ 100). Flat mode: the premium is the dollar amount itself. Total pay = (base + premium) × hours.
- No federal law requires a shift premium. The authoritative rate is your employer's policy or union contract, which is why the presets here are labeled typical ranges, not promises.
- The premium applies to every hour entered. Overtime is separate, but under the FLSA the differential counts toward your regular rate, so it lifts your overtime rate too.
- A percentage premium grows with every raise; a flat amount stays fixed until the policy changes. That difference decides most job-offer comparisons.
- Quick Answer
- How to use the shift premium calculator
- Shift premium formula: percent mode and flat mode
- Worked example: a 10-hour night shift at $22 an hour
- Percent premium vs flat premium: which offer is better?
- Shift premiums and the law: what the FLSA does and does not say
- What other shift premium calculators miss
- Frequently asked questions
- Add This Calculator to Your Website
- References
How to use the shift premium calculator
Pick the mode that matches how your employer states the premium, enter three numbers, and read the result. Results stay hidden until you calculate, unless you tap a preset.
- Choose the mode: "Percent of base rate" if your policy quotes a percentage (10% nights, 25% holidays), "Flat $ per hour" if it quotes dollars ($2.50/hour). The premium field's label switches to match.
- Enter your base hourly rate: your wage before the premium. The worked example uses $22.
- Enter hours worked: the hours the premium covers, 10 in the example. Every hour entered gets the premium; the tool does not split out overtime hours.
- Enter the premium: 20 in percent mode in the example, or use a preset. Evening 10%, Night 15%, Weekend 20% and Holiday 25% fill the field, switch to percent mode and calculate immediately.
- Click Calculate: you get the premium per hour, the total hourly rate and total pay, with Copy and Share buttons in the results box.
Blank fields are rejected one at a time: "Please enter a valid base hourly rate.", "Please enter valid hours worked." and "Please enter a valid premium." One honest limitation: the tool does not reject negative numbers, so a negative base rate or premium produces negative pay figures instead of an error. Real rates and premiums are never negative; if you see a minus sign in the result, an input has one too.
Shift premium formula: percent mode and flat mode
The premium is an addition to the hourly rate, computed one of two ways depending on how the policy states it. Everything after that is the same addition and multiplication.
Flat mode: Premium per hour = Flat amount per hour
Total hourly rate = Base rate + Premium per hour
Total pay = Total hourly rate × Hours worked
The two modes diverge over time. A 10% premium on a $22 rate pays $2.20 an hour today and $2.42 after a 10% raise, because it is chained to the base. A flat $2.50 pays $2.50 forever, until someone renegotiates it. Neither is better by default: flat amounts are easier to budget and to check on a pay stub, percentages keep their real value as wages rise. What matters is entering the premium in the mode your policy actually uses. Typing 2.5 into percent mode when your differential is $2.50 flat understates a 10-hour shift by $22.75, which is the single most common mistake with this kind of tool.
Worked example: a 10-hour night shift at $22 an hour
A nurse works a 10-hour night shift at a $22/hour base rate with a 20% premium. Those are the pre-filled values, and every row below is a real run of the calculator.
| Scenario | Mode | Premium/hr | Total rate | Hours | Total pay |
|---|---|---|---|---|---|
| Night shift, $22 base (worked example) | Percent 20% | $4.40 | $26.40 | 10 | $264.00 |
| Same shift, flat differential | Flat $2.50 | $2.50 | $24.50 | 10 | $245.00 |
| Night preset, $22 base | Percent 15% | $3.30 | $25.30 | 10 | $253.00 |
| Holiday preset, $22 base | Percent 25% | $5.50 | $27.50 | 10 | $275.00 |
| Short evening shift, $19.75 base | Percent 12.5% | $2.47 | $22.22 | 7.5 | $166.64 |
The last row shows the tool's rounding honestly: the exact premium is $2.46875 an hour and the exact total is $166.640625. The display rounds each figure to cents ($2.47, $22.22, $166.64), so the rounded pieces do not multiply back into each other perfectly. Payroll systems do the same on stubs; the underlying total is computed from unrounded values, as it is here.
Percent premium vs flat premium: which offer is better?
Percent and flat premiums that look equal today separate with every raise. Compare them over the life of the job, not the first paycheck.
Percent of base rate (20% on $22)
- Pays $4.40/hr now, and rises automatically with each base-rate raise.
- Harder to verify at a glance: the stub figure depends on the current base rate.
- Common in hospital and union contracts stated as a percentage differential.
Flat amount per hour ($2.50 on any base)
- Pays $2.50/hr now and $2.50/hr in five years, unless the policy is renegotiated.
- Trivial to check: one fixed number on every stub.
- Common in warehousing and manufacturing, and worth relatively more to lower-paid staff.
Run both modes on the same hours before accepting an offer. A $2.50 flat differential beats a 10% premium at a $22 base ($24.50 vs $24.20 an hour), and loses to it once the base passes $25. For holiday work specifically, where many policies jump to time and a half or double time rather than a differential, the holiday pay rate calculator models that multiplier structure directly.
Shift premiums and the law: what the FLSA does and does not say
No federal law requires a shift premium, and the differential does count toward overtime. Those two facts, both from the U.S. Department of Labor, decide most disputes about this pay.
On the requirement: the Department of Labor's FLSA questions and answers state plainly that extra pay for weekend or night work is a matter of agreement between employer and employee, and the FLSA does not require it. The same position appears in the Department's elaws FLSA Advisor. Your handbook, offer letter or collective bargaining agreement is the document that creates the right to a differential.
On overtime: a differential is not a side payment that sits outside your pay rate. The regulation at 29 CFR 778.207 requires nightshift differentials, whether a percent of base or cents per hour, to be included in the regular rate before overtime is computed. The Department's Fact Sheet 56C works a full example: a $15/hour employee with a $1 evening differential and a bonus lands on a $17.89 regular rate, and overtime is priced from that figure, not from $15. It also shows up on the enforcement side: the nursing-care fact sheet lists failing to include shift differential in the regular rate among the common overtime violations. If your hours cross 40 in a week and the numbers stop adding up, the unpaid overtime calculator estimates what the corrected rate does to the check, and the gross up paycheck calculator helps when you are working backward from a target take-home figure.
What other shift premium calculators miss
Most differential tools get the core multiplication right and stop early. The gaps that matter in practice:
- Percent only. A large share of employers, warehouses and factories especially, pay differentials as flat dollars per hour. A percent-only tool forces those workers to convert by hand before they can start. This calculator takes both forms natively and labels the field for the mode you picked.
- Eligible hours vs all hours confusion. The deeper payroll tools split day, night and overtime hours, which is right for a full paycheck and overkill for checking one shift's premium. This tool is deliberately single-rate: every hour entered earns the premium, and it says so.
- The legal context. Almost no competing calculator mentions that no federal law guarantees a differential, or that the differential feeds the regular rate for overtime. Those two facts change how you read the result, and they are sourced to the Department of Labor in the References below.
- Presets without provenance. Tools that hard-code "night = 15%" without a caveat invite workers to treat a typical range as their entitlement. The presets here are labeled as typical ranges to confirm against your own policy.
- Annualizing everything. Per-shift, per-week and per-year projections are nice, but they multiply assumptions. This page gives the per-hour and per-shift figures you can verify against one pay stub, which is where errors are actually caught.
Frequently asked questions
In most cases, no. Shift differentials are a matter of employer policy or union contract; no federal law requires them. Some states or industries have their own rules, so check local labor law and your employee handbook.
Night-shift differentials commonly run $1–$3 per hour or 5–15% of base pay in healthcare, manufacturing, and logistics; weekend and holiday premiums can be higher. Your employer's policy document is the only authoritative source.
Usually, yes. Under the FLSA, most shift differentials are straight-time earnings that must be included when computing your regular rate of pay, the rate on which the 1.5x overtime premium is based. So a night differential can raise your overtime rate as well as your night hours.
The premium is 22 × 15% = $3.30 per hour, so the total hourly rate is $25.30 and a 10-hour shift pays $253.00. That is the Night 15% preset in the calculator: tap it with the default base rate and hours and you get exactly these figures.
A flat amount erodes with every raise, while a percentage scales automatically. Over a few years, a 10% differential usually beats a $2/hour one after a couple of base-rate raises. Model both before you decide.
No. It applies one premium to every hour you enter and does not split regular and overtime hours. If some of your hours pass 40 in a week, overtime is priced from your regular rate, which under the FLSA includes the differential, so the overtime rate is higher than 1.5 times base pay alone.
No. It is ordinary wage income, subject to the same federal, Social Security, Medicare, and state withholding as your base pay. It just makes the paycheck bigger.
It depends on your employer. Some stack premiums (for example, night plus weekend on Saturday night hours); others pay only the higher of the two. Check your policy before assuming either.
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References
- U.S. Department of Labor, Wage and Hour Division. Questions and Answers About the Fair Labor Standards Act (FLSA) (extra pay for weekend or night work is a matter of agreement; the FLSA does not require it). Accessed October 24, 2026.
- U.S. Department of Labor. elaws: Fair Labor Standards Act Advisor, Is Extra Pay Required for Weekend or Night Work? (same position, with the time-and-a-half regular-rate rule for hours over 40). Accessed October 24, 2026.
- Code of Federal Regulations. 29 CFR 778.207, Other Types of Contract Premium Pay Distinguished (nightshift differentials, percent or cents per hour, must be included in the regular rate before overtime is computed). Accessed October 24, 2026.
- U.S. Department of Labor, Wage and Hour Division. Fact Sheet #56C: Bonuses under the Fair Labor Standards Act (Example B works a $1 evening shift differential into a $17.89 regular rate and prices overtime from it). Accessed October 24, 2026.
- U.S. Department of Labor, Wage and Hour Division. Fact Sheet #31: Nursing Care Facilities Under the Fair Labor Standards Act (failing to include shift differential in the regular rate listed among common overtime violations). Accessed October 24, 2026.
- U.S. Government Publishing Office. 29 CFR Part 778, Section 778.207 (2021 edition, official PDF) (the regulation text as published in the Code of Federal Regulations). Accessed October 24, 2026.