Lesson 4 of 7
Bonuses & Supplemental Wages
Anthony called in February, frustrated.
“I got a $5,000 bonus in December,” he said. “And now I owe $800? How does getting more money mean I owe money?”
The preparer had this conversation every single tax season. “Let me ask you something first,” she said. “What was the tax rate on your bonus check? Did Amazon take out 22%?”
“Yeah — they took out 22%. I remember thinking it was a lot.”
“Right. And your marginal tax rate, based on your total income this year, is 24%. So 22% got withheld, 24% was owed. That 2% gap on $5,000 is $100 of your balance. The rest came from your regular paycheck withholding also being slightly off. It’s not that your bonus was taxed more — it’s that it wasn’t withheld at quite the right rate.”
Bonuses cause more client confusion and more client complaints than almost any other part of the tax return. The widespread belief is that bonuses are taxed at a higher rate than regular wages. That is not true — and understanding why it’s not true is one of the most useful things you can explain to a client.
What Supplemental Wages Are
Supplemental wages are wages paid to an employee in addition to their regular wages, and paid separately or identified separately. The IRS defines several types:
• Bonuses
• Commissions
• Overtime pay
• Back pay
• Accumulated sick pay
• Prizes and awards
• Nonqualified stock option income
• Fringe benefits included in wages
All of these end up in Box 1 of the W-2 along with regular wages. The IRS taxes them the same way — as ordinary income at the taxpayer’s marginal rate. But the withholding method for supplemental wages is different from regular wages, and that difference is the source of the confusion.
The 22% Flat Rate Withholding Method
When an employer pays a bonus separately from a regular paycheck, they can choose to withhold at a flat 22% rate (the supplemental wage flat rate in 2025) rather than going through the normal withholding calculation. This is easier for payroll departments — one fixed percentage, no complex calculation.
The problem is that 22% may be too low or too high for any given employee. For someone in the 12% bracket, 22% is over-withheld — they get more back in April. For someone in the 24% bracket like Anthony, 22% is under-withheld — they owe a little more in April. The tax rate on the bonus was not higher. The withholding rate was lower than needed for Anthony’s total income.
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If You Only Remember One Thing...
Bonuses are NOT taxed at a higher rate than regular wages. They are taxed as ordinary income at your marginal rate, same as everything else. The confusion comes from the 22% flat withholding on the bonus check. Withholding rate is not tax rate. Explain this clearly every time a client complains about their bonus.
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If You Only Remember One Thing About Bonuses...
Bonuses are not taxed at a higher rate. They are withheld at a flat 22% rate. Those are different things. Withholding rate is what your employer sends in during the year. Tax rate is what you actually owe, calculated on your total income. The flat 22% is often slightly off from the real rate — too low for clients in the 24%+ brackets, and sometimes too high for lower earners. That difference is what creates the refund or balance due.
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If You Only Remember One Thing About Bonuses...
Bonuses are not taxed at a higher rate. They are withheld at a flat 22% rate. Those are different things. Withholding rate is what your employer sends in during the year. Tax rate is what you actually owe, calculated on your total income. The flat 22% is often slightly off from the real rate — too low for clients in the 24%+ brackets, and sometimes too high for lower earners. That difference is what creates the refund or balance due.
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If You Only Remember One Thing About Bonuses...
Bonuses are not taxed at a higher rate. They are withheld at a flat 22% rate. Those are different things. Withholding rate is what your employer sends in during the year. Tax rate is what you actually owe, calculated on your total income. The flat 22% is often slightly off from the real rate — too low for clients in the 24%+ brackets, and sometimes too high for lower earners. That difference is what creates the refund or balance due.
The Aggregate Method
Some employers use the aggregate method instead of the flat rate. Under this method, the employer adds the bonus to the employee’s regular wages for the pay period and calculates withholding on the combined amount. This often results in higher withholding on the bonus check because the combined income for that period pushes the calculation into a higher withholding bracket temporarily. Clients who experience this think their bonus was “taxed at 35%” when in reality the withholding was calculated on a larger combined paycheck amount.
How Bonuses Show Up on the W-2
Bonuses are included in Box 1 of the W-2 with regular wages. There is no separate bonus box. The total tax withheld on the bonus is included in Box 2 with all other withholding. By the time you see the W-2, there is no indication of which dollars came from the base salary and which came from the bonus — it’s all combined.
The only way to know a client received a bonus is to ask, or to notice that the Box 1 amount seems higher than expected based on their stated pay rate. This is why the intake conversation matters. Ask: “Did you receive any bonuses, commissions, or special pay this year?”
Anthony’s Bonus Situation — Why He Owes $800
Regular wages$50,000
Year-end bonus$5,000
Total W-2 Box 1$55,000
Withholding on regular wages (calibrated for $50K)$5,200
Withholding on bonus (22% flat)$1,100
Total withheld$6,300
Actual tax on $55,000 (after standard deduction, 24% bracket)$7,100
Balance due$800
The One Big Beautiful Bill — Overtime Is Now Deductible
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2025 Law Update — One Big Beautiful Bill
For tax years 2025 through 2028, eligible employees may deduct the qualified overtime premium — the extra pay above their regular rate for overtime hours. This is not the full overtime paycheck. It’s the premium portion above the base rate. Overtime wages still appear in Box 1 of the W-2. The deduction is claimed on the return. You need the client’s pay stubs to identify the premium amount — the W-2 does not separate it. Ask every W-2 client who works hourly: “Did you work overtime this year? Can you get your pay stubs?”
💬 Garcia Family — Commission Income
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Mrs. Garcia
My husband's pay changes every month. Some months he makes $6,000, some months $1,500. He always ends up owing in April. Is that normal?
RM
Preparer
For commission-based workers, yes. His employer calculates withholding based on each individual paycheck. A $6,000 commission month looks like a high-income month to the payroll system, so it withholds at a higher rate. A slow $1,500 month barely withholds anything. By year-end those estimates don't always add up to the right annual total.
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Mrs. Garcia
So what can he do?
RM
Preparer
Two options. He can update his W-4 to add a flat extra dollar amount withheld per paycheck — even $50 or $100 per check makes a real difference. Or we estimate his expected annual income and I can tell him exactly how much extra to request. The goal is to build a cushion during the good months to cover the gap in the slow ones.
💬 Garcia Family — Commission Income
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Mrs. Garcia
My husband's pay changes every month. Some months he makes $6,000, some months $1,500. He always ends up owing in April. Is that normal?
RM
Preparer
For commission-based workers, yes. His employer calculates withholding based on each individual paycheck. A $6,000 commission month looks like a high-income month to the payroll system, so it withholds at a higher rate. A slow $1,500 month barely withholds anything. By year-end those estimates don't always add up to the right annual total.
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Mrs. Garcia
So what can he do?
RM
Preparer
Two options. He can update his W-4 to add a flat extra dollar amount withheld per paycheck — even $50 or $100 per check makes a real difference. Or we estimate his expected annual income and I can tell him exactly how much extra to request. The goal is to build a cushion during the good months to cover the gap in the slow ones.
💬 Garcia Family — Commission Income
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Mrs. Garcia
My husband's pay changes every month. Some months he makes $6,000, some months $1,500. He always ends up owing in April. Is that normal?
RM
Preparer
For commission-based workers, yes. His employer calculates withholding based on each individual paycheck. A $6,000 commission month looks like a high-income month to the payroll system, so it withholds at a higher rate. A slow $1,500 month barely withholds anything. By year-end those estimates don't always add up to the right annual total.
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Mrs. Garcia
So what can he do?
RM
Preparer
Two options. He can update his W-4 to add a flat extra dollar amount withheld per paycheck — even $50 or $100 per check makes a real difference. Or we estimate his expected annual income and I can tell him exactly how much extra to request. The goal is to build a cushion during the good months to cover the gap in the slow ones.
Commissions and Variable Pay
Commission-based employees often have highly variable income and highly variable withholding. A salesperson might earn $8,000 in January and $2,000 in March. Withholding is calculated on each paycheck individually, not on the projected annual total. This can produce significant over- or under-withholding by year end.
For clients with commission income, the conversation about updating the W-4 to add extra withholding is especially important. A high-commission month can push the withholding into a higher bracket temporarily, while a low month may not cover enough. The year-end W-2 often shows a balance due or a large refund as a result.
💬 Explaining Bonuses to Anthony
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Anthony
So my bonus wasn’t actually taxed at 22%?
RM
Preparer
The bonus was withheld at 22% — meaning that’s what Amazon sent to the IRS from your bonus check. But your actual tax rate on those dollars, based on your total income, is 24%. So there’s a 2% gap. On $5,000, that’s $100. The rest of your balance comes from your regular withholding also being slightly low.
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Anthony
Why does everyone say bonuses are taxed more?
RM
Preparer
Because when people get their bonus check and see the withholding, they do the math and see 22%. Their regular paycheck might be at 15% effective withholding. So it looks like more. But it’s not more tax — it’s more withholding on that specific check. Your actual tax on every dollar is determined by your total annual income and your bracket. Not by the check it happened to come in.
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🏢 Real Office Scenario
A client works as a car salesperson. She made $24,000 in base salary and $38,000 in commissions. Her W-2 shows $62,000 in Box 1. She expected a refund because “they took so much out all year.” You run the return and she owes $1,400. She’s upset. You explain: her high-commission months had higher withholding but the calculation didn’t account for her total annual income correctly across all months. The $1,400 is the gap between what was withheld based on each individual paycheck’s calculation and what her actual annual tax works out to be on $62,000 combined. The fix going forward: add flat extra withholding to every paycheck through the W-4 to build a cushion for exactly this situation.
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⚠️ Common Beginner Mistake
Telling a client their bonus was "taxed at 22%" as if that's their tax rate. It's their withholding rate on the bonus payment. Their actual marginal tax rate may be higher or lower. The distinction matters because clients make financial decisions based on what they think their "bonus tax rate" is. Give them the accurate explanation: withholding rate is what your employer sends in. Tax rate is what you actually owe based on total income. Those are different numbers.
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Pro Tip — The W-4 Conversation
Any time a client owes a balance due, ask: “Would it help to adjust your withholding for next year?” Then use the IRS withholding estimator at IRS.gov to calculate the right number. This five-minute conversation turns a frustrated client into someone who comes back next year already prepared.
📍
Pro Tip — The W-4 Conversation
Any time a client owes a balance due, ask: “Would it help to adjust your withholding for next year?” Then use the IRS withholding estimator at IRS.gov to calculate the right number. This five-minute conversation turns a frustrated client into someone who comes back next year already prepared.
📍
Pro Tip — The W-4 Conversation
Any time a client owes a balance due, ask: “Would it help to adjust your withholding for next year?” Then use the IRS withholding estimator at IRS.gov to calculate the right number. This five-minute conversation turns a frustrated client into someone who comes back next year already prepared.
💬 Words You'll Hear in the Office
Supplemental WagesWages paid in addition to regular pay — bonuses, commissions, overtime, prizes.
Flat Rate WithholdingThe 22% rate employers may use to withhold on supplemental wages instead of the normal calculation method.
Aggregate MethodThe alternative withholding method — adds bonus to regular wages and calculates withholding on the combined amount.
Marginal Tax RateThe rate applied to the last dollars of taxable income — what you actually owe on additional income.
Effective Withholding RateThe average rate of tax withheld across all paychecks — often different from the marginal rate.
Overtime PremiumThe portion of overtime pay above the regular rate of pay — potentially deductible under the 2025 One Big Beautiful Bill.
📋 From the Desk of Ralph Martinez
The bonus conversation is one I have more than almost any other. Clients are frustrated, they feel like they got punished for earning more, and they’re wrong about why they owe. Correcting that misunderstanding clearly and without making them feel foolish is a skill. I say it this way: “Your bonus wasn’t taxed differently. It was withheld at 22% because that’s the flat rate Amazon uses for bonuses. Your actual tax on those dollars is 24% based on your total income. That 2% gap on five thousand dollars is a hundred dollars. The rest of your balance is from a different issue.” Short, clear, not condescending. That’s how you explain it.
— Ralph Martinez · Ruskin, FL · Est. 2001