Sales Commission Tax Calculator: How Much Do I Take Home?

The IRS withholds federal tax on sales commissions at a flat 22% — but that 22% is not your actual tax rate. A B2B SaaS AE earning the median $92,000 in annual commission (11.5% of ACV on an $800K quota, per Bridge Group's 2024 benchmark) will have the IRS withhold $20,240 in federal supplemental tax alone — which may be more or less than what they actually owe, depending on their base salary, filing status, and state. No single percentage applies to your situation, and the calculator above computes both what gets withheld now and what you actually owe the moment you enter your commission amount, your state, and your filing status.

The Most Important Distinction Nobody Explains

When your commission check lands, two different numbers matter — and most reps only know one of them.

What gets withheld now is the amount your employer removes from the check before it hits your bank account. For a W2 employee receiving a separately identified commission payment, the IRS requires your employer to withhold federal tax at a flat 22% supplemental rate, plus Social Security (6.2%), Medicare (1.45%), and whatever your state requires. This is mechanical — it happens automatically based on fixed rates regardless of what you actually earn for the year.

What you actually owe is determined by your total annual income and your marginal tax bracket. If your base salary plus commission puts your total income in the 32% bracket, you owe 32% federal tax on every additional dollar of income — including every dollar of commission. The 22% withholding doesn't cover that gap. You'll owe the difference in April.

The opposite is also true. If your total income puts you in the 12% bracket, the 22% withholding is significantly more than you owe. You've given the IRS an interest-free loan for the year, and you'll get the overage back as a refund.

The delta between those two numbers — withheld vs. actually owed — is the number that determines whether April is a surprise bill or a refund check. It depends entirely on your commission amount, your base salary, your state, and your filing status. Enter those four numbers in the calculator above and you'll see exactly where you stand.

How Commission Taxes Work for W2 Employees

If you receive a W2 from your employer, commission is classified as supplemental wages under IRS Publication 15. When your employer pays your commission separately from your base salary — which is standard practice at most B2B companies — they use the flat-rate withholding method.

Federal supplemental withholding: 22%. The IRS allows employers to withhold exactly 22% of any commission payment up to $1,000,000 in supplemental wages from the same employer in the same calendar year. This rate was set by the Tax Cuts and Jobs Act and made permanent by the One Big Beautiful Bill Act signed in 2025. It applies regardless of your bracket, your W-4 elections, or your base salary. If you receive more than $1,000,000 in supplemental wages from the same employer in a single calendar year, the portion above $1M is withheld at 37%.

The 22% is a withholding convenience, not a special tax rate on commissions. Your final federal tax on the commission is determined by your marginal bracket at filing time.

FICA taxes: Social Security and Medicare. FICA applies to commission checks exactly as it applies to salary. Your employer withholds 6.2% for Social Security up to the 2026 wage base of $184,500, and 1.45% for Medicare with no cap. If your combined wages and commission push your total W2 earnings above the $184,500 Social Security wage base, Social Security withholding stops for the year — the 6.2% applies only to the first $184,500 of earnings. Medicare has no ceiling.

There is one additional layer: the Additional Medicare Tax of 0.9% applies to wages above $200,000 for single filers and $250,000 for married filing jointly. Unlike the base Medicare tax, employers are not required to withhold this automatically until wages clearly exceed the threshold. Many high-earning reps discover this at filing time rather than on their commission check.

State income tax. Most states apply their own supplemental withholding rate to commission payments. California withholds 10.23%. New York withholds 11.7% (higher if you live in New York City, where an additional 4.25% local rate applies). Nine states — Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming — have no income tax, meaning zero state withholding on your commission.

The combined effect on a W2 commission check varies dramatically by state. A $25,000 commission in Texas results in roughly $7,800 withheld (federal supplemental + FICA, no state tax). The same $25,000 commission in California or New York results in roughly $10,000–$11,000 withheld — the same federal layer, plus state supplemental rates that are among the highest in the country.

Enter your state in the calculator above to see your exact withholding breakdown. The result depends entirely on your location — no generic percentage applies across states.

How Commission Taxes Work for 1099 Contractors

If you receive a 1099-NEC rather than a W2, the mechanics are fundamentally different. No employer withholds taxes from your commission payments. You receive the full gross amount, and the tax obligation is entirely yours to calculate, set aside, and remit — quarterly.

Self-employment tax: 15.3%. As a 1099 contractor, you pay both the employee and employer portions of FICA. That combined rate is the self-employment tax: 12.4% for Social Security plus 2.9% for Medicare, totaling 15.3%. However, SE tax is calculated on 92.35% of your net self-employment income, not the full gross amount — the 7.65% reduction reflects the employer share that W2 employees never see deducted from their gross pay.

The self-employment tax rate for 2026 applies to the first $184,500 of combined wages and self-employment income for Social Security. Above that threshold, Social Security drops out and only the 2.9% Medicare portion continues. Above $200,000 (single) or $250,000 (MFJ), the Additional Medicare Tax of 0.9% applies.

The SE tax deduction. You can deduct 50% of your self-employment tax from your gross income before calculating federal income tax. This is one of the most important and most overlooked features of 1099 taxation. On $40,000 of commission income with a $5,652 SE tax bill, the deduction reduces your taxable income by $2,826 — a direct reduction in the income subject to your federal bracket.

Federal income tax. After subtracting the SE tax deduction, your standard deduction ($16,100 single, $32,200 MFJ in 2026), and any business expenses, your remaining net income is taxed at the standard progressive federal brackets. Unlike W2 employees who have 22% withheld automatically, 1099 contractors owe the full income tax on filing with no withholding credit unless they make quarterly estimated payments.

Quarterly estimated payments. If you expect to owe more than $1,000 in federal taxes for the year, the IRS requires quarterly estimated payments using Form 1040-ES. The 2026 due dates are April 15, June 15, September 15, and January 15. Missing these deadlines triggers an underpayment penalty even if you pay the full tax bill by April — the penalty is calculated on the shortfall for each quarter, not just the annual total.

Most 1099 sales contractors should set aside 25–30% of net commission income to cover combined self-employment tax and federal income tax. The exact amount depends on your total income, filing status, state, and deductions — and it's exactly what the calculator above computes for your specific numbers. There is no single percentage that applies to all 1099 reps.

Formula

W2 — What gets withheld on your commission check

federal_supplemental = commission × 0.22
// If YTD supplemental wages + commission > $1,000,000:
//   amount over $1M is withheld at 37% instead

social_security = min(commission, max(0, 184500 − YTD_wages)) × 0.062
// SS withholding stops once total YTD wages reach $184,500

medicare = commission × 0.0145

state_withheld = commission × state_supplemental_rate

total_withheld = federal_supplemental + social_security + medicare + state_withheld
net_check = commission − total_withheld

W2 — What you actually owe at filing

total_annual_income = base_salary + other_income + commission
taxable_income = total_annual_income − standard_deduction − retirement_contributions

marginal_rate = bracket_rate(taxable_income, filing_status)
federal_actually_owed_on_commission = commission × marginal_rate

delta = federal_supplemental − federal_actually_owed_on_commission
// delta > 0 → over-withheld → expect a refund
// delta < 0 → under-withheld → set this aside now

1099 — What you owe at filing

se_tax_base = commission × 0.9235
se_tax = se_tax_base × 0.153
// SS portion (12.4%) applies only up to $184,500 combined
// Medicare (2.9%) applies with no cap

se_tax_deduction = se_tax × 0.50

taxable_income = commission − business_expenses − se_tax_deduction − standard_deduction
federal_income_tax = apply_brackets(taxable_income, filing_status)

state_tax = (commission − business_expenses) × state_income_rate

total_owed = se_tax + federal_income_tax + state_tax
quarterly_payment = total_owed / 4

What Each Variable Means

Commission amount is the gross commission you received or expect to receive — before any taxes. This is the number on your commission statement or payment notice, not your net bank deposit.

Filing status determines which tax bracket thresholds apply and the size of your standard deduction. Single filers face lower thresholds than married filing jointly filers, which means the same total income pushes a single filer into a higher bracket more quickly.

State determines the supplemental withholding rate on your commission. The difference between a no-tax state and California or New York is roughly 10 percentage points on your commission — on a $50,000 check, that's $5,000 in state tax alone.

Annual base salary determines where in the tax brackets your commission income falls. Commission is not taxed in isolation — it layers on top of your base salary. A $30,000 commission lands in a different bracket for someone earning $60,000 base than for someone earning $200,000 base. Without this number, the calculator defaults to $80,000 and estimates accordingly.

W2 vs 1099 determines the entire structure of your tax obligation. W2 means your employer withholds automatically and you receive a net check. 1099 means you receive gross and owe everything yourself, including the full 15.3% self-employment tax that W2 employees split with their employer.

State Supplemental Withholding Rates 2026

* States marked with an asterisk do not publish a flat supplemental rate and require employers to use their standard withholding tables. The calculator estimates these using the 2026 top marginal state income tax rate as an approximation — actual employer withholding may differ. New York City residents add a 4.25% local rate on top of the 11.70% state rate for a combined 15.95%.

Source: IRS Publication 15 (2026), Ernst & Young 2026 State Supplemental Withholding Rate Guide, Deel 2026 State Supplemental Tax Rate Table.

Examples

Example 1 — W2 rep, 22% bracket (roughly right). Single, California, commission $25,000, base salary $80,000. Base + commission = $105,000 total. After the $16,100 standard deduction, taxable income = $88,900 — firmly in the 22% bracket. What gets withheld: federal supplemental $5,500 (22%), Social Security $1,550 (6.2%), Medicare $362.50 (1.45%), California state $2,557.50 (10.23%). Total withheld: $9,970. Net check: $15,030. What's actually owed: marginal rate is 22% — the same as the withholding rate, so federal tax on the commission is $5,500. Delta: $0. No surprise at filing.

Example 2 — W2 rep, 32% bracket (under-withheld). Single, New York, commission $50,000, base salary $180,000. Base + commission = $230,000 total. After the $16,100 standard deduction, taxable income = $213,900 — in the 32% bracket. What gets withheld: federal supplemental $11,000 (22%), Social Security $0 (already past the $184,500 wage base on salary alone), Medicare $725 (1.45%), Additional Medicare $450 (0.9% on the portion above the $200K threshold), New York state $5,850 (11.7%). Total withheld: $18,025. Net check: $31,975. What's actually owed: marginal federal rate is 32%, so federal tax on the commission is $16,000. Delta: −$5,000. Set this aside now — you'll owe it in April. This is the most common scenario for mid-market and enterprise AEs hitting accelerators: the 22% flat withholding covers less than 70% of the actual federal tax obligation on a commission landing in the 32% bracket.

Example 3 — 1099 contractor (the case most reps get wrong). Single, Texas, commission $40,000, no base salary, no business expenses. No employer withholds anything — the full $40,000 arrives in your account. SE tax base: $40,000 × 0.9235 = $36,940. SE tax: $36,940 × 0.153 = $5,652. SE tax deduction (50%): $2,826. AGI: $40,000 − $2,826 = $37,174. Taxable income: $37,174 − $16,100 = $21,074. Federal tax: $1,192 (10% on first $11,925) + $1,098 (12% on next $9,149) = $2,290. Texas state tax: $0. Total owed: $5,652 + $2,290 = $7,942. Effective rate: 19.9%. Net take-home: $32,058. Quarterly estimated payment: $1,985. The counter-intuitive result: the effective rate is lower than the 22% a W2 rep would have withheld, because the SE tax deduction reduces federal taxable income and the full income falls in low brackets with no salary base underneath it. But every dollar is your responsibility — nothing is withheld, and missing a quarterly payment triggers a penalty.

Example 4 — W2 rep, 12% bracket (over-withheld). Single, Florida, commission $8,000, base salary $35,000. Base + commission = $43,000 total. After the $16,100 standard deduction, taxable income = $26,900 — in the 12% bracket. What gets withheld: federal supplemental $1,760 (22%), Social Security $496 (6.2%), Medicare $116 (1.45%), Florida state $0. Total withheld: $2,372. Net check: $5,628. What's actually owed: marginal rate is 12%, so federal tax on the commission is $960. Delta: +$800 over-withheld — you'll get this back as a refund when you file. SDRs and junior AEs earning lower base salaries frequently land in this scenario: the 22% flat withholding over-captures because their marginal rate is well below it.

How to Reduce Your Commission Tax Bill

None of these strategies eliminate the tax on your commission. They reduce the amount of income subject to tax, which lowers the bracket your commission lands in and the final amount you owe. Your specific savings depend entirely on your income, your filing status, and the amounts you contribute — which is why the calculator lets you model 401k contributions in the settings drawer.

401k pre-tax contributions. Contributing to a traditional 401k reduces your taxable income dollar for dollar. The 2026 contribution limit is $23,500 ($31,000 if you're 50 or older). For a rep in the 32% bracket, the maximum contribution saves $7,520 in federal income tax alone — not counting state savings.

HSA contributions. If you have a high-deductible health plan, HSA contributions are deductible above the line. The 2026 limit is $4,300 for individual coverage and $8,550 for family coverage. Like the 401k, these reduce taxable income before brackets are applied.

1099 business expense deductions. If you receive 1099 commission income, legitimate business expenses reduce your net self-employment income before SE tax is calculated. Home office (using the simplified method: $5 per square foot up to 300 sq ft), business mileage at $0.725 per mile in 2026, software, phone, and professional development costs all reduce both SE tax and federal income tax. The deduction flows through Schedule C and reduces both SE tax and income tax.

Timing of commission receipt. For 1099 contractors with variable income, receiving a large commission in December vs. January can shift it between tax years. If you expect lower income next year — a new role, a territory change, paternity leave — deferring a year-end commission payment to January may reduce your total tax bill. W2 employees generally do not have control over when commission is paid.

SEP-IRA or Solo 401k for 1099. Self-employed contractors can contribute up to 25% of net self-employment income to a SEP-IRA, up to the 2026 annual maximum of $70,000. A solo 401k allows up to $23,500 in employee contributions plus 25% of net earnings as employer contributions. These dramatically reduce taxable income for high-earning 1099 reps. The savings are specific to your income level — model them in the drawer.

Methodology

The withholding calculation uses the IRS flat-rate percentage method (22% federal), which is the default and most common method used by B2B employers for separately identified commission payments. The aggregate method — where commission is combined with regular salary and withheld at the blended rate — is available but less common in software sales. Both produce the same final tax obligation at filing; they differ only in how much is withheld upfront.

The "actually owed" calculation for W2 applies the 2026 federal marginal bracket rate (from IRS Revenue Procedure 2025-32) directly to the commission amount, once the commission is layered on top of the estimated base salary to determine which bracket it falls into. The standard deduction ($16,100 single, $32,200 MFJ, $24,150 HoH in 2026) is applied before the bracket lookup.

For 1099 contractors, federal income tax is calculated as a full progressive tax on total taxable income — each bracket's rate applies only to the slice of income within that bracket — since there is no separate base-salary layer to isolate the commission from.

State supplemental rates use the official flat rates where published. For states using the aggregate method (Connecticut, Delaware, Hawaii, Maryland, New Jersey, Oklahoma, West Virginia, Wisconsin), the top marginal state rate is used as an approximation. Actual employer withholding in these states may differ.

SE tax for 1099 is calculated on 92.35% of net income per Schedule SE, reflecting the deductibility of the employer-equivalent half. The 50% SE tax deduction is applied as an above-the-line deduction before federal income tax brackets are applied.

Assumptions

• The calculator uses the IRS flat-rate percentage method (22% federal) for W2 commission withholding. Employers using the aggregate method will produce different withholding amounts on the same commission.
• The standard deduction is applied for the selected filing status. Taxpayers who itemize may have lower taxable income and owe less than the calculator estimates.
• Social Security withholding is calculated on the commission amount, reduced by any YTD wages already entered in the Customize drawer. If no YTD wages are entered, the calculator assumes wages are below the $184,500 wage base.
• The Additional Medicare Tax (0.9%) threshold is $200,000 for single and head of household filers, and $250,000 for married filing jointly. Employers are not required to withhold this automatically until wages clearly exceed the threshold.
• For 1099, the 50% SE tax deduction is applied before calculating federal income tax, per Schedule SE rules.
• New York City residents face an additional 4.25% local supplemental rate. This is shown as informational context; the state rate used in calculations is New York's 11.70% state-level rate.
• Commission amounts where total YTD supplemental wages exceed $1,000,000 from the same employer are withheld at 37% on the excess. The calculator models this if YTD supplemental wages are entered in the Customize drawer.
• The calculator does not apply SALT deduction limits, AMT, the qualified business income (QBI) deduction, or tax credits.

Limitations

This calculator estimates withholding and federal tax liability on commission income. It does not model the alternative minimum tax (AMT), net investment income tax (NIIT), earned income credit, child tax credit, or other tax credits. For 1099 workers, the QBI deduction (up to 20% of qualified business income) can materially reduce taxable income and is not included. State-specific deductions, credits, and local taxes beyond New York City are not modeled. The aggregate withholding method used by some employers will produce different withholding amounts than this calculator shows. For 1099 contractors with significant business expenses or retirement plan contributions, the actual tax liability may differ materially from the calculator's estimate. This tool is an estimation tool — not a substitute for advice from a qualified tax professional. The introduction example references a B2B SaaS AE's median commission specifically, but the withholding and tax math applies identically to commission income in any B2B industry.

This tool is part of RepMath's collection of free sales tools built for B2B sales professionals.

Last updated: 2026-07-09 · Data sources version: 2026