Commission & Bonus Tax Rate Calculator Guide (2026): Why NYC & NY Withhold 45%+ (22% IRS + 11.70% NYS + 4.25% NYC) & Overwithholding Refunds
Why was your commission or bonus taxed at 40%–50%? Calculate 2026 IRS 22%/37% supplemental withholding, NYS 11.70% & NYC 4.25% bonus rates, and your April tax refund.
By Pablo Cirre Gómez and East Corp Capital Quantitative Desk
Every February and March across Wall Street, Midtown software sales floors, and Tri-State brokerage offices, employees open their pay stubs and ask the same alarmed question: “Why did payroll take 42% to 50% of my commission or bonus check?” The answer lies in the sharp gap between statutory supplemental payroll withholding rates (22% or 37% IRS + 11.70% New York State + 4.25% New York City + FICA) and your actual marginal income tax rate at year-end.
Commission & Bonus Tax Withholding Calculator (2026): IRS 22% / 37% + NY/NYC
Calculates exact payroll withholding on sales commissions, Wall Street bonuses, and RSU vestings under the 22% IRS supplemental flat rate (37% above $1M), NYS 11.70%, NYC 4.25%, and FICA caps.
Why New York Withholds 11.70% (NYS) + 4.25% (NYC) = 15.95% on Every Bonus and Commission Check
Under IRS Treasury Regulation § 31.3402(g)-1, commissions, annual bonuses, overtime, signing bonuses, severance, and vested Restricted Stock Units (RSUs) are classified as “Supplemental Wages.” When an employer pays supplemental wages separately from regular salary (or identifies the amount separately), payroll engines such as ADP, Workday, and Gusto apply flat statutory supplemental withholding rates:
- Federal Supplemental Rate: A flat 22.00% on the first $1,000,000 of supplemental wages in a calendar year, jumping to a mandatory 37.00% on every dollar above $1,000,000.
- New York State (11.70%) & New York City (4.25%): Even though New York State’s actual income tax bracket for a single filer earning $80,650 to $1,077,550 is only 5.50% to 6.85% (and NYC’s top bracket is 3.876%), NYS Publication NYS-50 mandates a flat 11.70% NYS supplemental withholding rate and a 4.25% NYC supplemental withholding rate to cover NY’s “tax benefit recapture” table on ultra-high earners.
2026 Statutory Schedule & Jurisdiction Benchmark Table
| Scenario / Statutory Rule | 2026 Rate / Metric | Dollar Impact / Threshold | Legal Citation & Note |
|---|---|---|---|
| IRS Supplemental Rate (≤ $1,000,000 YTD) | 22.00% Flat Federal | Optional flat rate used by 95%+ of US payroll systems (ADP/Workday) | Treas. Reg. § 31.3402(g)-1 |
| IRS Mandatory Tier (> $1,000,000 YTD) | 37.00% Mandatory Federal | Overrides W-4 settings on all supplemental dollars > $1M | IRC § 3402(g) |
| New York State Supplemental Rate | 11.70% Statutory Rate | 4.85% higher than 6.85% middle-upper NYS bracket → generates refund | NYS Pub. NYS-50 |
| New York City Supplemental Rate | 4.25% Statutory Rate | 0.374% higher than 3.876% top NYC bracket → generates refund | NYS Pub. NYS-50 |
| Yonkers Resident Supplemental Rate | 1.95975% (16.75% × 11.70%) | 0.50% for non-residents working in Yonkers | NYS Pub. NYS-50 |
Calculating Your Automatic NYS/NYC Bonus Overwithholding Refund (Or Adjusting Form IT-2104)
Because New York withholds 11.70% + 4.25% = 15.95% on a bonus check while a Manhattan employee earning $150,000 to $500,000 actually owes a marginal NYS+NYC rate of only 9.876% to 10.726% (6.00% or 6.85% NYS + 3.876% NYC), payroll overwithholds 5.22% to 6.07% on every commission and bonus dollar! On a $100,000 bonus, that means NYS/NYC withholds $5,224 too much—which you either get back as a tax refund on Form IT-201 in April or recover immediately during the year by adjusting your NY withholding allowances on Form IT-2104.
Frequently Asked Questions & Statutory Rules (2026)
Why did my $100,000 bonus have TOO LITTLE federal tax withheld if my total income is $450,000?
While New York State OVER-withholds at 11.70%, the IRS 22.00% flat supplemental rate UNDER-withholds for anyone whose total taxable income sits in the 32%, 35%, or 37% federal bracket! If you earn $350,000+ and receive a large bonus under $1M withheld at 22%, set aside an extra 10%–13% for federal safe-harbor estimated taxes.
Why are RSUs (Restricted Stock Units) withheld at 22% (or 37%) via "Sell-to-Cover"?
When RSUs vest, their fair market value on the vesting date is taxed as W-2 supplemental wage income. Most brokerage plans default to withholding 22% federal shares (plus NYS/NYC and FICA shares), which leaves 32%–35% bracket tech and finance employees owing additional federal tax at year-end unless they elect a higher voluntary RSU withholding rate.
When does the 6.2% Social Security tax stop coming out of my commission or bonus checks?
In 2026, the Social Security OASDI wage cap is $176,100 ($10,918.20 maximum employee tax). Once your combined year-to-date base salary + commissions + bonuses reach $176,100 with a single employer, the 6.2% Social Security deduction drops to $0.00 for the rest of the year.
What is the Aggregate Method vs. the 22% Flat Rate Method for commission withholding?
If an employer combines your commission and regular base salary into a single paycheck without specifying the separate supplemental amount, the payroll system uses the "Aggregate Method"—annualizing that single combined paycheck as if you earned that amount every pay period of the year, which often triggers temporary 32%–35% federal withholding.