How to Calculate Overtime Pay at Time-and-a-Half

As a payroll professional, the question I get more than any other is how to calculate overtime pay at time and a half. It sounds simple — 1.5 times the regular rate — but the Fair Labor Standards Act (FLSA) layers on exemption tests, regular-rate inclusion rules, and state-specific daily overtime that turn a basic multiplication problem into one of the most common sources of wage violations in the United States. The Department of Labor's Wage and Hour Division recovers hundreds of millions of dollars in back wages every year, and overtime miscalculation is consistently the leading cause.

This guide walks through the federal framework, who qualifies, the formulas with worked examples, and the mistakes I most often see employers make. If you want to run the numbers for your own paycheck, our Overtime Calculator handles the math automatically.

FLSA Overtime Basics

Under the FLSA, non-exempt employees must be paid one and one-half times their regular rate of pay for all hours worked over 40 in a single workweek. A workweek is a fixed, recurring 168-hour period — it does not have to align with the calendar week, and you cannot average hours across two or more workweeks.

Key federal thresholds for 2026:

Meeting the salary threshold alone is not enough — the employee must also pass the duties test (executive, administrative, professional, computer, or outside sales). Several states set higher thresholds. California, for example, requires a salary of at least $66,560/year for employers with 26 or more employees to even begin the exemption analysis.

Who Gets Overtime?

Overtime eligibility turns on the exempt vs. non-exempt classification, not on whether someone is paid hourly or salaried.

• Non-exempt hourly workers — The majority of the workforce. Eligible for overtime.
• Non-exempt salaried workers — Paid a fixed salary but earning below the threshold or failing the duties test. Still eligible for overtime.
• Exempt employees — Meet both the salary threshold and the duties test. Not eligible for overtime.
• Outside sales and certain agricultural workers — Exempt under specific FLSA provisions.
• Independent contractors (1099) — Not employees under the FLSA, so overtime does not apply. Misclassification is a major compliance risk.

When classification is unclear, the Hourly vs Salary Calculator can help illustrate the total compensation trade-offs between the two structures.

How to Calculate Time-and-a-Half

The core formulas are straightforward:

• Regular rate = hourly wage (for a simple hourly employee)
• Overtime rate = regular rate × 1.5
• Overtime pay = OT hours × OT rate
• Total pay = (regular hours × regular rate) + (OT hours × OT rate)

Worked Example 1: Hourly Worker

A non-exempt employee earns $20/hour and works 48 hours in a week.

1. Regular pay: 40 × $20 = $800
2. Overtime rate: $20 × 1.5 = $30/hour
3. Overtime pay: 8 × $30 = $240
4. Total pay: $800 + $240 = $1,040
5. Effective hourly rate: $1,040 / 48 = $21.67/hour

Worked Example 2: Salaried Non-Exempt

A non-exempt employee earns a $45,000/year salary and works 45 hours in a week. Under the FLSA fluctuating workweek method, the salary covers all straight-time hours worked, and overtime is owed at only the half-time premium.

1. Weekly salary: $45,000 / 52 = $865.38
2. Regular rate: $865.38 / 45 hours worked = $19.23/hour
3. Half-time premium: $19.23 × 0.5 × 5 OT hours = $48.08
4. Total for the week: $865.38 + $48.08 = $913.46

The regular rate must be recalculated each week because it depends on total hours worked. To convert an annual salary into an implied hourly rate for comparison, use the Salary Converter or the Hourly Rate Converter.

Double-Time Pay

The federal FLSA does not require double-time pay — only time-and-a-half after 40 hours. Double-time is a creature of state law, union contracts, and company policy.

• California: 2× the regular rate for hours worked over 12 in a day, and for hours over 8 on the seventh consecutive day of work in a workweek.
• Union contracts and employer policies frequently provide double-time for holidays, seventh-day work, or shifts exceeding a set length.

If you work in a state with daily overtime, your total premium can stack: an 11-hour California day might trigger 1.5× for hours 9–11, while a 13-hour day triggers 2× for hours 13 and beyond.

Bonuses, Commissions, and Shift Differentials

This is where most employers get the math wrong. The regular rate is not just the base hourly wage — it must include most additional compensation.

When a non-discretionary bonus is paid retroactively, the employer must recalculate the regular rate for the bonus period and pay the additional overtime owed — what payroll professionals call a "true-up." Ignoring this step is one of the most common FLSA violations the Wage and Hour Division cites.

State-Specific Overtime Rules

Several states impose daily overtime in addition to the federal 40-hour rule. When both federal and state law apply, the rule more favorable to the employee controls.

• California: 1.5× after 8 hours/day, 2× after 12 hours/day, and special rules for the seventh consecutive day.
• Alaska: 1.5× after 8 hours/day OR 40/week.
• Nevada: 1.5× after 8 hours/day for employees earning less than 1.5× the minimum wage.
• Colorado: 1.5× after 12 hours/day OR 40/week.
• Most other states: Follow the federal 40-hour/week rule only.

Always check both the state labor code and any applicable wage orders — daily overtime rules can vary by industry within the same state.

Common Employer Mistakes

In my experience reviewing payroll practices, these errors recur:

• Paying a salary to avoid overtime. A salary does not create an exemption. The employee must meet both the salary level and the duties test.
• Excluding bonuses from the regular rate. Non-discretionary bonuses, commissions, and shift differentials must be folded in.
• Averaging hours over multiple weeks. Each workweek stands alone. You cannot carry over or offset hours.
• Offering comp time instead of overtime. Compensatory time off in lieu of overtime pay is illegal in the private sector (it is allowed only for certain public-sector employees).
• Misclassifying workers as independent contractors. A 1099 worker who should be an employee is owed back overtime.
• Not paying for off-the-clock work. Pre-shift setup, post-shift cleanup, and mandatory training are all hours worked.

How to Verify You're Being Paid Correctly

If you suspect an underpayment, take these steps:

1. Track your own hours — keep a personal log independent of the employer's system.
2. Save your paystubs — they are your evidence if a dispute arises.
3. Recalculate your regular rate including all bonuses, commissions, and differentials.
4. File a complaint with the Department of Labor's Wage and Hour Division if you find a shortfall.
5. Know the deadlines. The FLSA statute of limitations is 2 years, extended to 3 years for willful violations.

Overtime back wages are generally owed with the unpaid premium plus an equal amount as liquidated damages, effectively doubling the recovery — and the employer typically cannot deduct attorney's fees from what you receive.

Bottom Line

Calculating overtime pay at time-and-a-half is conceptually simple — 1.5× the regular rate for hours over 40 — but the regular rate must include bonuses, commissions, and shift differentials, and several states add daily overtime on top of the federal rule. The 2026 federal salary exemption threshold is $35,568/year ($684/week) with a $107,432 highly compensated cap, though states like California set higher bars. Get the classification right, fold all required pay into the regular rate, and never average hours across workweeks. When in doubt, run the numbers with the Overtime Calculator and compare the result against your paystub.

Next Steps

• Calculate your overtime with the Overtime Calculator.
• Convert an annual salary to an hourly rate with the Salary Converter.
• Translate between pay periods using the Hourly Rate Converter.
• Compare total compensation structures with the Hourly vs Salary Calculator.
• See how overtime flows through your tax return with the Income Tax Calculator.

Sources

• Fair Labor Standards Act (FLSA), 29 U.S.C. § 207 — federal overtime requirement of time-and-a-half for hours over 40 in a workweek.
• U.S. Department of Labor, Wage and Hour Division — official guidance on overtime pay, exemptions, and the regular rate of pay.
• 29 CFR Part 541 — regulations defining the executive, administrative, professional, and computer employee exemptions, including the $35,568/$684 salary threshold and $107,432 highly compensated threshold.
• IRS Publication 15 (Circular E) — employer tax guide covering withholding and payroll tax treatment of supplemental wages including overtime.
• U.S. Bureau of Labor Statistics — data on hourly earnings, overtime hours, and non-exempt workforce composition.
• California Labor Code § 510 and applicable Wage Orders — daily overtime (1.5× after 8 hours, 2× after 12 hours) and seventh-consecutive-day rules.