How to Calculate Overtime Pay: FLSA Formulas, Regular Rates & Examples
Learn how to calculate 1.5x time-and-a-half overtime, determine the statutory regular rate of pay under 29 U.S.C. § 207, and avoid common payroll calculation errors.
Key Takeaways
- Under the federal Fair Labor Standards Act (FLSA 29 U.S.C. § 207), covered nonexempt employees must receive overtime pay of at least 1.5× their regular rate of pay for all hours worked over 40 in a single workweek.
- Basic Overtime Formula: Overtime Hourly Rate = Base Regular Rate × 1.5. Total Weekly Pay = (40 × Regular Rate) + (Overtime Hours × Overtime Rate).
- Distinguish the total overtime rate (1.5×, e.g. $37.50/hr at a $25 base) from the half-time overtime premium (0.5×, e.g. $12.50/hr additional above straight time).
- The regular rate of pay is not always your base hourly rate: under 29 U.S.C. § 207(e), nondiscretionary bonuses, shift differentials, and commissions must be factored into the regular rate.
- Federal overtime is calculated on a fixed, recurring 7-day (168-hour) workweek, not averaged across two-week biweekly pay periods.
- Several states enforce daily overtime rules that exceed the federal standard, such as California (daily overtime after 8 hours) and Nevada (daily overtime for workers earning under 1.5× state minimum wage).
Under federal law (the Fair Labor Standards Act, 29 U.S.C. § 207), covered nonexempt employees who work more than 40 hours in a 7-day workweek must receive overtime pay at a rate of not less than one and one-half times (1.5×) their regular rate of pay.
The Basic Federal Overtime Formula
Total Overtime Rate (1.5×) vs. Half-Time Overtime Premium (0.5×)
Payroll software and accounting formulas often compute overtime using one of two equivalent mathematical approaches:
Separates straight hours from overtime hours. For 45 hours at $25.00/hour:
- • 40.0 hrs × $25.00 = $1,000.00 (Base Pay)
- • 5.0 hrs × ($25.00 × 1.5 = $37.50) = $187.50 (OT Pay)
- • Total Gross Pay = $1,187.50
Pays all 45 hours at straight time first, then adds the 0.5× premium to overtime hours:
- • 45.0 total hrs × $25.00 = $1,125.00 (All Hours at Base)
- • 5.0 OT hrs × ($25.00 × 0.5 = $12.50) = $62.50 (OT Premium)
- • Total Gross Pay = $1,187.50
Both methods yield the exact same total. The second method illustrates that overtime pay consists of straight-time pay plus an additional 50% half-time premium.
Overtime Pay Rates at Common Hourly Wages
The table below demonstrates 1.5× time-and-a-half rates, the additional 0.5× premium, and gross earnings for a 45-hour workweek across sample wage tiers:
| Base Hourly Rate | Half-Time Premium (0.5×) | Overtime Rate (1.5×) | 40h Straight Pay | 5h Overtime Pay | 45h Total Gross |
|---|---|---|---|---|---|
| $18.00 / hr | $9.00 / hr | $27.00 / hr | $720.00 | $135.00 | $855.00 |
| $22.00 / hr | $11.00 / hr | $33.00 / hr | $880.00 | $165.00 | $1,045.00 |
| $25.00 / hr | $12.50 / hr | $37.50 / hr | $1,000.00 | $187.50 | $1,187.50 |
| $30.00 / hr | $15.00 / hr | $45.00 / hr | $1,200.00 | $225.00 | $1,425.00 |
Crucial FLSA Nuance: What Is the Statutory “Regular Rate of Pay”?
Under 29 CFR § 778.109, an employee's “regular rate of pay” is not simply their contracted hourly base rate. It is computed as the total straight-time remuneration earned for the workweek divided by the total hours worked:
- Nondiscretionary Bonuses (29 CFR § 778.208): Attendance bonuses, productivity bonuses, safety incentives.
- Shift Differentials (29 CFR § 778.207): Extra pay for night shifts or weekend duty.
- Commissions (29 CFR § 778.117): Sales commissions and piece-rate earnings.
- Discretionary Gifts & Bonuses: Spontaneous holiday gifts not tied to hours or performance.
- Paid Non-Work Time (29 U.S.C. § 207(e)(2)): Vacation pay, sick leave, and holiday pay when no work is performed.
- Expense Reimbursements: Travel mileage or per diem lodging.
Worked Example: Nondiscretionary Bonus Impact on Overtime
Suppose an employee works 48 hours in a workweek at a base rate of $20.00/hour and earns a $96.00 weekly attendance bonus:
- 1. Base earnings: 48 hours × $20.00 = $960.00.
- 2. Total straight-time remuneration: $960.00 + $96.00 bonus = $1,056.00.
- 3. True Regular Rate: $1,056.00 ÷ 48 hours = $22.00 / hr (not $20.00).
- 4. Overtime premium owed: 8 OT hours × ($22.00 × 0.5) = 8 × $11.00 = $88.00.
- 5. Total Legal Gross Pay: $1,056.00 + $88.00 = $1,144.00.
*Notice that calculating overtime solely from the $20.00 base rate would have yielded only $80.00 in overtime premium (8 × $10.00), unlawfully shorting the employee by $8.00.*
Overtime Applies to Each Single Workweek, Not Averaged Across Two Weeks
Under federal law ( 29 CFR § 778.104), overtime is evaluated strictly on a single workweek basis (a fixed 168-hour period). Even if your company issues paychecks on a biweekly schedule, an employer cannot average your hours across two weeks to avoid overtime.
Read our in-depth compliance guide to understand why working 45 hours in Week 1 and 35 hours in Week 2 entitles you to 5 hours of overtime despite totaling 80 hours.
State-Specific Overtime Laws & Statutory Caveats
Federal FLSA standards establish a minimum floor. Several states mandate daily overtime rules that provide higher compensation:
- California (Labor Code § 510): Requires 1.5× pay after 8 hours in a workday and for the first 8 hours on the 7th consecutive day of the workweek; requires 2.0× double-time after 12 hours in a workday or after 8 hours on the 7th consecutive day.
- Nevada (NRS 608.018): Requires daily overtime after 8 hours worked in a 24-hour period only for employees whose regular wage is less than 1.5 times the state minimum wage. Employees earning 1.5× minimum wage or more are subject to the standard 40-hour weekly rule.
- Alaska (AS 23.10.060): Mandates overtime after 8 hours in a workday.
- Colorado (7 CCR 1103-1): Requires overtime after 12 hours in a workday or after 40 hours in a workweek.
How to Check Your Paystub for Missing Overtime
If your paystub displays fewer overtime hours or a lower gross amount than your shift records indicate, use our Paycheck Hours Checker to compare your entered hours against paystub earnings line items. This tool isolates mathematical discrepancies so you can document questions with your employer's payroll office.
Editorial Process, Verification Standards & Educational Disclaimers
Algorithmic Math & Automated Regression Coverage
Calculations in this guide rely on base-60 integer-minute arithmetic matching our calculation engines. Automated regression test suites validate specific computational classes: elapsed-minute tallying, midnight rollover modulo arithmetic, meal break deductions, weekly 40-hour overtime thresholds, multi-tier multipliers, and published case study arithmetic (such as daily rounding variances, unrecorded meal deduction impact, regular rate bonus reallocations, and biweekly single-workweek calculations). These test suites verify numerical and algorithmic consistency; they do not establish statutory compliance, legal validity, or applicability to individual employment situations.
Selection of Authoritative Primary Sources
Statutory references are drawn directly from official U.S. government sources, including Title 29 of the Code of Federal Regulations (29 CFR § 785.11, § 785.18, § 785.19, and 29 CFR Part 541) and U.S. Department of Labor Wage and Hour Division publications. We provide direct hyperlinks to official .gov repositories.
Content Drafting, AI Assistance & Attribution
Educational content is compiled and structured with AI assistance and synthesized from public labor standards and mathematical algorithms, published under the organizational byline “TimeCard Web Editorial Team”. We do not claim individual human credentials, legal degrees, or licensed payroll certifications. Factual corrections or regulatory amendments are updated with documented revision dates.
Educational Limitations & Legal Disclaimers
This publication provides educational calculation examples and general statutory overviews. It does not provide formal legal, accounting, tax, or human resources advice, nor does it establish binding wage determinations. State and municipal laws (such as California Labor Code § 510 or state-mandated meal break penalties) often differ significantly from federal FLSA baselines. Consult qualified employment counsel or state labor authorities for specific wage disputes.
Overtime Pay Calculator
Compute 1.5x overtime and 2.0x double-time wages with exact integer-minute precision.
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Related Educational Guides
Why federal law evaluates overtime on a standalone workweek basis (29 CFR § 778.104).
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