Is Overtime Pay Taxed at a Higher Rate?

Overtime pay is taxed at the same rates as regular wages. There is no special overtime tax rate. But because overtime pushes gross pay higher in that pay period, employees often see a bigger withholding chunk, which is where the confusion starts.

There Is No Special Overtime Tax Rate

The IRS does not have a separate tax rate for overtime hours. The same federal income tax brackets, the same Social Security rate, and the same Medicare rate all apply whether an hour was the employee's 35th or 55th hour of the week. Overtime wages are ordinary wages. They land in W-2 Box 1 alongside regular pay, and the same withholding tables govern both.

The misunderstanding comes from a real pattern: employees do see larger withholding amounts on overtime weeks. That's not a higher tax rate at work. It's a higher gross triggering more withholding at the same rates. The distinction matters because it changes how you should budget labor costs and how you talk to employees about their paychecks. Here's what actually changes and what stays the same when hours run over 40:

Why Overtime Withholding Looks Higher on the Paycheck

Federal income tax uses a progressive rate structure. The more someone earns, the higher the marginal rate on each additional dollar above each threshold. Payroll withholding tries to approximate the annual tax bill by annualizing the current pay period's wages.

When an employee works 48 hours instead of 40, their weekly gross jumps. The payroll system takes that higher gross, multiplies it by 52 (for weekly payroll), calculates the projected annual tax on that annualized figure, then divides back down to get the current-period withholding. If the annualized overtime wages push the employee's projected income into the next bracket, withholding climbs noticeably for that check, even if overtime is irregular for that person.

The employee's actual tax bill for the year is based on what they earned across all 52 weeks, not on any one week's annualized projection. If they worked heavy overtime in June but little the rest of the year, the June withholding was probably higher than their actual tax on those wages. They get that excess back as a refund at filing, or it offsets what they owe. The money didn't disappear. It was withheld early.

For employers, the practical impact is twofold. Gross pay per employee goes up on overtime weeks. And withholding amounts go up, which you remit on your deposit schedule regardless of cash flow timing. Both affect the size of your payroll run, not just the wages line.

This mechanic is worth understanding because employees sometimes misread their situation in ways that create payroll questions. An employee may think overtime isn't worth it because the net bump feels small. But the net pay is always larger on an overtime week than on a regular-hours week at the same base rate. The withholding recalibrates at tax time through the refund process. A clear explanation from you heads off the misunderstanding before it affects morale.

FICA on Overtime Pay: Social Security and Medicare

FICA covers two taxes: Social Security and Medicare. Both apply to overtime wages at the same rates they apply to regular wages. Current rates are confirmed by IRS Topic 751 and codified in 26 U.S.C. § 3101:

• Social Security: 6.2% from the employee and 6.2% from the employer (12.4% combined), applied to wages up to the annual wage base ($168,600 for 2024). Once an employee's wages from you cross that threshold, Social Security withholding stops for the rest of the year on both sides.
• Medicare: 1.45% from the employee and 1.45% from the employer (2.9% combined), applied to all wages with no annual cap.
• Additional Medicare Tax: An extra 0.9% applies to individual wages over $200,000 in a calendar year. You withhold it from the employee but owe no employer match on that 0.9% portion.

Employee FICA combined: 7.65%. Employer FICA combined: 7.65%. For every dollar of overtime wages you pay, you owe an additional 7.65 cents in employer FICA, the same as on every regular-wage dollar.

In dollar terms this adds up quickly. Say five employees each average three overtime hours per week at $15 per hour. That's 15 overtime hours per week across the group, $337.50 in overtime wages. Your employer FICA on those hours alone: $25.82 per week, roughly $1,343 per year. Add more employees, more hours, or a higher base rate, and the employer FICA on overtime becomes a real line item in your labor budget, separate from the wage cost itself.

Workers' compensation premiums deserve a note here. In most states they're calculated on total gross wages including overtime. If your workers' comp rate is $4.50 per $100 of wages and an employee earns $1,040 in a heavy overtime week versus $800 in a regular week, you pay about $10.80 more in workers' comp for that week. Multiply that across many employees and many overtime weeks and the workers' comp cost of overtime adds more than most operators budget for.

What Overtime Really Costs You as an Employer

The gross overtime wage is only part of your cost. Add employer FICA and the per-hour picture changes. Here's the total employer cost per overtime hour at common base pay rates:

These numbers are wages plus your FICA match only. State unemployment taxes (FUTA runs 6% on the first $7,000 per employee per year, often reduced by SUTA credits to an effective 0.6%), workers' comp premiums on gross wages, and any benefits that scale with hours worked add more on top. A quick budget check: multiply projected overtime wages by 1.0765 to get your gross-plus-employer-FICA number. Compare that to the cost of adding a part-time hire or adjusting schedules to cover the same hours without overtime. Many operators find overtime is cheaper short-term but an expensive habit when it runs week after week.

To run the numbers for your specific team, the Kloqk overtime calculator handles gross pay, FICA, and estimated withholding in one place. It's free and doesn't require an account.

Does Overtime Pay Count as Supplemental Wages?

It depends on how you pay it, and the distinction affects which withholding method applies.

The IRS defines supplemental wages as compensation paid in addition to regular wages, including bonuses, commissions, severance, and certain overtime payments. Employers have two withholding options for supplemental wages:

1. Aggregate method: Combine the supplemental wages with the regular wages for the period and withhold using the standard payroll tables on the combined total. This is the correct method when overtime is paid in the same check as regular wages, which is how most small businesses run payroll.
2. Optional flat rate (22%): Withhold at a flat 22% if you pay the wages in a separate check, separately identified as supplemental pay. For amounts over $1 million in a calendar year the rate jumps to 37%. This is a withholding shortcut, not a different tax rate on the income itself.

For most small businesses, overtime flows through the regular bi-weekly or weekly payroll run. The aggregate method applies automatically. The 22% flat rate only becomes relevant when you cut a standalone bonus or back-pay check outside the normal cycle. Overtime rolled into the regular paycheck: aggregate method, full stop.

One common trap: some owners hear “22% supplemental withholding rate” and assume that's how overtime pay is taxed across the board. It's not a blanket overtime rate. It's a withholding shortcut that applies only when you pay overtime in a separate, identified check. The employee's actual tax liability at year-end is still based on their total annual income and the regular bracket structure, regardless of how any individual check was withheld. Over-withheld at the supplemental rate means a bigger refund at filing, not a permanent loss.

Overtime Withholding Steps for HR and Payroll Managers

If you run or review payroll for a small business, here are the things worth checking every time overtime runs heavy:

1. Track overtime wages separately on the pay stub. Overtime pay and regular pay both land in W-2 Box 1, but separate line items help employees understand their stubs and make it easier to catch entry errors before they turn into disputes or corrections.
2. Watch the Social Security wage base. The 2024 Social Security wage base is $168,600. Once an employee's wages from your company cross that amount, both your employer Social Security contribution and their employee withholding stop for the rest of the year. Overtime weeks accelerate when high earners approach that cap. Your payroll software tracks this automatically, but verify it for senior or salaried employees who also qualify for overtime.
3. Trigger Additional Medicare withholding at $200,000. You must begin withholding the extra 0.9% Medicare tax once a single employee's wages from your company reach $200,000 in a calendar year. Overtime weeks push people past that threshold faster than regular-hours projections suggest.
4. Budget before you approve overtime. Project the cost before the work week, not after. Multiply projected overtime hours by the 1.5x rate, then by 1.0765 for your FICA match. That's your floor. Compare it to the cost of alternative coverage. Many managers discover they're approving overtime by default when scheduling adjustments would have been cheaper.
5. Get accurate punch data first. None of the math above works if the underlying time records are wrong. If employees are rounding hours manually or submitting estimates, your overtime liability is both unknown and potentially under-reported. Accurate records also protect you in a wage-and-hour audit.

Accurate punches are the starting point for all of this. See how overtime laws and thresholds work across states so you know which employees qualify, what the trigger hours are in your jurisdiction, and what records you're legally required to keep.

Talking to Employees About Overtime Taxes

The question “why am I keeping so little of my overtime?” comes up often. Having a clear, accurate answer matters for morale and for trust in your payroll process.

The honest answer has two parts. First, payroll withholding annualizes each check. A heavy-overtime week looks like a high-income year to the withholding tables, so the system pulls more tax from that check to match the projected annual bill. If overtime is irregular, the employee will likely get that excess back as a refund when they file. Second, the employee's take-home is always higher on an overtime week than on a regular-hours week at the same base rate. What surprises people is that the net increase is smaller than the gross increase. That's just math: the same tax rates apply to the extra dollars, plus withholding runs a bit aggressive because the system doesn't know how often overtime will repeat.

What not to say: “overtime is taxed at a higher rate.” That's inaccurate. It erodes trust when an employee looks it up, and it sets a wrong expectation about how their annual return works. The correct explanation is: same rates, higher gross, more withheld on that check, square up at filing. If they're concerned about persistent over-withholding, they can file a new W-4 to adjust or use the IRS Tax Withholding Estimator to calibrate it for their situation.

On your end, use the Kloqk overtime calculator to model what different overtime scenarios cost your business before you approve the hours. Knowing the full employer cost upfront, FICA included, turns overtime from a budget surprise at the end of every pay period into a decision you make with clear numbers in front of you.

Frequently Asked Questions

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