Paycheck Calculator: What Actually Lands in Your Account

Jordan closed her biggest deal of the year in December — a $14,000 commission check — and watched nearly a third of it disappear before it ever touched her account. Her regular paychecks never lost that much. She told her manager commissions “must get taxed at a higher rate” and started quietly steering a borderline deal into January instead of closing it before year-end, on the theory that spreading commissions out would cost her less in tax. Her commission wasn’t taxed at a higher rate. It was withheld at a flat rate that has nothing to do with her actual tax bracket — and the deal she pushed into January cost her a month of interest on money she was owed for no tax benefit at all.

Jordan is a composite character — a stand-in for a pattern that shows up constantly among salespeople, freelancers with bonus-heavy income and anyone paid on commission, not a real payroll record. Her numbers are invented. The withholding rule that confused her is not.

What actually happened to that $14,000

The IRS treats commissions, bonuses, overtime, severance and several other categories as “supplemental wages” — and when a supplemental payment is made separately from a regular paycheck, Publication 15 instructs employers to withhold federal income tax from it at a flat 22%, regardless of what tax bracket the employee is actually in. Above $1 million in cumulative supplemental wages in a calendar year, the excess is withheld at 37% without regard to the employee’s W-4 at all. Add Jordan’s normal 7.65% payroll tax on top, and a $14,000 commission check loses roughly a third of its face value to withholding before she ever sees it — not because commissions are taxed more, but because the IRS tells employers to withhold a flat rate on them that has nothing to do with her real bracket.

Why the two numbers almost never match

If Jordan’s actual marginal bracket for that income is below 22%, the flat withholding overshoots what she truly owes, and the difference comes back to her as part of her refund the following spring — it isn’t lost, it’s just held longer than it needed to be. If her bracket is above 22%, the flat rate undershoots, and she’ll owe the difference at filing instead of it feeling like a bonus penalty in the moment. Either way, the number withheld from that one check was never a preview of her actual tax bill; it’s a fixed administrative shortcut applied the same way to every employee’s supplemental pay, high earner or not.

What pushing the deal into January actually cost her

Jordan’s plan — delay closing a borderline deal so the commission lands in the next calendar year — assumed spreading commissions across two years lowers the withholding hit. It doesn’t: the flat 22% rate applies to each supplemental payment the same way regardless of which year it lands in, unless cumulative supplemental wages are approaching the $1 million threshold, which is not Jordan’s situation. All she actually did was delay being paid for a deal she’d already closed by a month, giving up a month of use of that money for zero change in what she’ll ultimately owe the IRS.

What to actually check on a commission-heavy paycheck

Don’t judge your real tax rate by what gets withheld from a single commission or bonus check — withholding on supplemental wages is a flat administrative rate, not a calculation of what you owe. Instead, estimate your actual full-year tax liability using your total expected income across every paycheck, and compare that to your total withholding for the year, not any one check in isolation. If you’re consistently over-withheld on commissions because your real bracket sits below 22%, that’s recoverable at filing, not lost. If you’re a high earner whose real bracket sits above 22% or 37% on the excess, the flat rate is quietly under-withholding you, and building a reserve for the gap avoids a filing-season surprise in the other direction.

What it costs to keep guessing instead of checking

Jordan’s one-month delay was a minor cost. Salespeople who repeatedly shy away from closing deals near quarter-end or year-end because they believe commissions “get taxed more” leave real money sitting unearned every year they hold that belief — not from any actual tax difference, but from turning down income based on a misunderstanding of a withholding rule that has zero bearing on what they ultimately owe.

What this does not mean

This is not a claim that withholding never matters, and it isn’t advice to ignore your W-4. High earners approaching or above the $1 million cumulative supplemental-wage threshold do face a real 37% mandatory withholding rate on the excess, and anyone whose true bracket sits well above 22% genuinely can end up owing more at filing than a single commission check suggested. The point is narrower: a single paycheck’s withholding percentage is not the same thing as your tax rate, in either direction, and decisions about when to close a deal should be based on business logic, not a guess about how bonuses are taxed.

Frequently asked questions

Are bonuses and commissions really taxed at a higher rate?

No. They’re often withheld at a higher flat rate — 22% for most employees, 37% on amounts above the $1 million cumulative threshold — but withholding is a prepayment estimate, not your actual tax. Your real liability is calculated on your total annual income at filing, same as any other wages.

Can I do anything to change how a bonus is withheld?

Some employers offer the aggregate method, combining the bonus with a regular paycheck and withholding as if it were one payment at your normal rate, which can better match your real bracket, but the choice of method generally sits with the employer, not the employee.

If I’m over-withheld on commissions, when do I get that money back?

When you file your return for that tax year. If your total withholding across the year exceeds your total tax liability, the difference comes back as part of your refund, regardless of which specific paycheck it was withheld from.

Should high earners worry about the flat rate under-withholding them?

Yes, if your marginal bracket is above 22%, or you’re over the $1 million cumulative supplemental-wage threshold where the mandatory rate is only 37%. In either case, setting aside the difference proactively avoids a larger-than-expected bill at filing.

Statutory sources, all official: IRS Publication 15 (Circular E), Employer’s Tax Guide, Section 7 on supplemental wages and the flat withholding rates; IRS Publication 15-T, Federal Income Tax Withholding Methods. The framing of withholding-versus-liability confusion as a specific driver of deal-timing decisions is Linqz’s own analysis, not stated by the IRS.

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Disclaimer: General information, not tax or financial advice, and Linqz is not a CPA firm or a registered tax preparer. “Jordan” is a composite character with invented finances, not a real person. Supplemental-wage withholding rates and thresholds are set by IRS guidance and can be updated — verify the current Publication 15 before relying on any figure, and consult a qualified tax professional about your own paycheck.