Last updated: September 2026

Overtime pay: rules, calculations, and the OBBBA deduction

The FLSA requires overtime at one and a half times the regular rate of pay, and the regular rate is not the same thing as the hourly rate. Shift differentials, nondiscretionary bonuses, commissions and piece rate earnings all fold into it. An employer who pays time and a half on base pay alone has used the right multiplier on the wrong number, and the shortfall repeats on every affected paycheck until someone catches it.

How overtime is actually calculated

The FLSA overtime formula looks simple: hours over 40 times 1.5 times the regular rate. The complexity lives inside "regular rate." The regular rate of pay includes every form of compensation except a short list of statutory exclusions (gifts, vacation pay, discretionary bonuses, and a few others). Everything else goes in. A warehouse worker earning $20 per hour with a $2 night shift differential and a $500 quarterly production bonus has a regular rate higher than $20. The shift differential adds to every overtime hour worked during that shift. The production bonus gets divided across all hours worked in the bonus period and adds to the regular rate retroactively.

Here's the math on that warehouse worker. All 45 hours earn the $20 base rate, so straight time is 45 times $20, or $900. Add 5 hours of the $2 shift differential, which is $10. Add the quarterly bonus allocated to this week, $500 divided by 13 weeks, or $38.46. Total compensation for the week is $948.46. Divide by the 45 hours worked and the regular rate is $21.08. The FLSA requires an additional half of the regular rate on the 5 overtime hours, which is $21.08 times 0.5 times 5, or $52.69. An employer paying 5 hours at $30 plus the differential and the bonus has paid $998.46. The correct total is $1,001.15. The gap is $2.69 for the week, or roughly $140 a year for one employee. The gap looks small on one paycheck. It is per employee, per week, and a Department of Labor recovery reaches back two years, three if the violation is willful.

The tradeoff with overtime compliance is calculation accuracy versus payroll processing speed. Getting the regular rate right requires your payroll system to track every compensation component and recalculate overtime retroactively when bonuses post. Most payroll software can do this if configured correctly.

The federal overtime deduction (OBBBA)

The One Big Beautiful Bill Act created a federal income tax deduction for qualified overtime, available for tax years 2025 through 2028. It is a deduction claimed on the individual return. It is not an exemption from tax and it changes nothing about payroll. The IRS states that qualified overtime is not excluded or exempted from wages for income tax withholding, Social Security or federal unemployment tax purposes.

Withholding continues at the normal rate. An employer may not reduce it to account for the deduction unless the employee furnishes an updated Form W-4, and the 2026 form was revised so employees can account for it in step 4(b). Both FICA shares are unchanged. The benefit arrives at filing, not in the paycheck.

Only the premium portion qualifies, meaning the extra half that the FLSA requires. At a $20 regular rate an overtime hour pays $30, and the qualified amount is the $10 premium. Overtime paid above what the FLSA requires does not add to it, and overtime owed only under state law, a union contract or employer policy does not qualify at all.

The deduction is capped at $12,500 on a single return and $25,000 on a joint return. Above $150,000 of modified adjusted gross income, or $300,000 filing jointly, it reduces by $100 for every $1,000 above that figure. The reduction applies to the capped amount rather than to the overtime actually earned, so a taxpayer below the cap reaches zero at a lower income than one at the cap. Married taxpayers must file jointly to claim it.

For tax years after 2025 the deduction is limited to what the employer reported in box 12 of the Form W-2 under code TT. That makes the employer's regular rate calculation load bearing in a new way. An understated code TT figure costs the employee the difference, and if the employer will not issue a corrected Form W-2c, the difference is lost.

State treatment is decided state by state. Alabama enacted its own overtime deduction under Act 2026-604 for tax years 2026 through 2028, capped at the lesser of the actual premium or $1,000 per taxpayer and keyed to the same code TT amount.

Our no tax on overtime calculator estimates the deduction for a 2025 return and shows the payroll tax that still applies to the same wages.

Exempt vs nonexempt

The overtime rules only apply to nonexempt employees. Exempt employees are not eligible for overtime pay regardless of hours worked. The exemption requires meeting both a salary threshold and a duties test. The federal salary level is $35,568 per year, restored to the Code of Federal Regulations in May 2026 after federal courts vacated the 2024 increase. The salary test alone doesn't determine status. An employee earning $80,000 per year who doesn't meet the executive, administrative, or professional duties test is nonexempt and entitled to overtime. Employers routinely misclassify employees as exempt based solely on salary, then face Department of Labor audits covering two to three years of unpaid overtime across every misclassified position.

The cost of getting exempt status wrong dwarfs the cost of paying overtime. An employee misclassified as exempt who works an average of 5 overtime hours per week at a $50,000 salary ($24.04 per hour) is owed $9,375 per year in overtime ($24.04 times 1.5 times 5 times 52 weeks). The DOL routinely assesses liquidated damages equal to the back pay, doubling the liability. Three years of misclassification for one employee: $56,250. For a department of five misclassified employees: $281,250.

Common overtime errors

Five errors account for most overtime liability. Using base pay instead of regular rate when bonuses, commissions, or shift differentials exist. Averaging hours across two workweeks instead of calculating overtime per individual workweek (the FLSA does not allow biweekly averaging unless a specific 8/80 healthcare exception applies). Misclassifying employees as exempt when they don't meet the duties test. Failing to count all compensable time, including pre-shift meetings, required training, and on-call hours where the employee's movement is restricted. Calculating tipped employee overtime from the tipped rate instead of the full minimum wage. Each error creates per-paycheck liability that accumulates silently until an audit or a lawsuit surfaces it.

Guides and tools

No tax on overtime calculator estimates the OBBBA deduction on a 2025 return and shows the payroll tax that still applies. Regular rate of pay explains the full FLSA calculation with examples for bonuses, shift differentials, commissions, and piece rates. How overtime is calculated covers the basics for employees checking their own paychecks. Nondiscretionary bonus overtime breaks down the retroactive recalculation that trips up most employers. California regular rate of pay covers the state method, which uses a different hours divisor and two separate bonus calculations.

Time and a half explains what the overtime multiplier means on a paycheck and when it applies. Weighted average overtime covers the formula for workers paid two rates inside one workweek, including the California exception. Double time pay explains that federal law does not require it and where state rules and union contracts do. Salaried nonexempt overtime covers what employers owe salaried workers who fall outside the exemption. Comp time vs overtime explains why private employers owe overtime in cash rather than time off.

Donning and doffing covers when gear up time counts as hours worked under the FLSA and the Portal to Portal Act. Overtime premium adjustments decodes the OT2 and REG RATE ADJ lines that appear when a bonus changes the overtime rate. Retroactive pay covers the overtime premium and withholding that ride along with a catch up check. Overtime calculator guide explains why many free tools run on base rate rather than regular rate. Is overtime tax free walks through what the OBBBA deduction does and does not cover.

Overtime errors often point to a payroll provider that isn't configured for regular rate calculations. If your software can't handle nondiscretionary bonus retroactive overtime, it's producing wrong paychecks every bonus period. Restaurant employers face a specific version of this problem because tipped overtime uses a different base rate than regular overtime.

This is not legal or financial advice. Consult a qualified professional for your specific situation.