Commission expense accounting sits on two tracks that don’t always move together: the financial-statement rules that govern when the cost hits your income statement, and the tax rules that govern when you can deduct it. For internal salespeople, commissions usually land in Selling, General, and Administrative expenses; for outside agents tied to inventory, they can belong in Cost of Goods Sold; and under ASC 340-40, some commissions have to sit on the balance sheet as an asset before they ever become an expense. On top of that, whether the recipient is an employee or a contractor changes your payroll tax, withholding, and reporting obligations entirely.
Where Commissions Belong on the Income Statement
Commissions paid to your internal sales team are typically recorded under Selling, General, and Administrative (SG&A) expenses. That is the default treatment for most businesses and directly reduces operating income.
In some industries, commissions paid to outside agents or brokers who facilitate the sale of inventory may belong in Cost of Goods Sold. This happens when the commission is a necessary cost of bringing the product to its sellable state or completing the transaction. The distinction changes your gross margin. If commissions are a significant percentage of the sale price and the agent’s role is integral to delivery, COGS classification is worth working through with your accountant.
When to Capitalize Commissions Instead of Expensing Them
Under ASC 340-40, you cannot always expense a commission the moment you pay it. The rule requires businesses to capitalize certain sales commissions as an asset on the balance sheet and recognize the expense gradually over time. It applies to incremental costs of obtaining a customer contract.
An incremental cost is one your company would not have incurred if the contract hadn’t been won. Sales commissions are the textbook example: if the salesperson only earns a commission because they closed the deal, that cost is incremental. Fixed salaries, general marketing expenses, and proposal costs don’t qualify, because you’d pay them regardless of whether a particular contract came through.
Amortization Period and Method
Once capitalized, the deferred commission asset gets amortized over the period your company expects to benefit from the underlying contract. That period isn’t always the same as the initial contract term. If a customer is likely to renew and the commission relates to goods or services delivered during those renewal periods too, the amortization window should reflect the full expected relationship. A four-year contract with an anticipated two-year renewal, for instance, could support a six-year amortization period.
The amortization method should mirror how the customer receives value. If benefits flow evenly over the contract, straight-line amortization works. The initial journal entry debits Deferred Contract Acquisition Costs (an asset) and credits Cash or Commissions Payable. Each period, an adjusting entry debits commission expense and credits the asset, moving the cost onto the income statement over time.
One important wrinkle: if the commission paid on a renewal contract is roughly equal to the commission paid on the original contract, you don’t need to extend the amortization period. The renewal commission stands on its own and is typically expensed over just the renewal term.
The One-Year Practical Expedient
ASC 340-40 includes a shortcut. If the expected amortization period is one year or less, you can expense the commission immediately when paid. This is not as simple as looking at the contract term. You must factor in anticipated renewals, amendments, and follow-on contracts with the same customer. If those push the expected benefit period beyond one year, the expedient doesn’t apply, even for a month-to-month agreement where renewals are virtually certain.
Material changes to your customer retention assumptions require updating the amortization schedule going forward. You don’t restate prior periods; the adjustment is prospective.
Tax Deduction Timing
The book rules above don’t control when you deduct commissions on your tax return. Tax timing follows your accounting method, and the capitalization requirements of ASC 340-40 generally don’t apply for tax purposes.
Under the cash method, deduct the commission in the tax year you actually pay it. No matching to revenue, no deferral.
Under the accrual method, you deduct commissions once three conditions are met: the obligation is fixed, the amount can be determined with reasonable accuracy, and economic performance has occurred. For commissions, economic performance generally happens when the salesperson or agent provides the service that triggers the payment. A recurring-item exception allows an accrual-method taxpayer to deduct a commission in the year the obligation becomes fixed, even if payment occurs up to 8½ months after the close of that tax year, provided the item is recurring, consistently treated, and either immaterial or better matched against income that way.1Office of the Law Revision Counsel. 26 U.S. Code 461 – General Rule for Taxable Year of Deduction
Payroll Taxes and Withholding on Employee Commissions
Commissions paid to employees carry the same payroll taxes as any other wages. That means Social Security tax at 6.2% (employer share) on earnings up to the 2026 wage base of $184,500, plus Medicare tax at 1.45% on all earnings with no cap.2Social Security Administration. Contribution and Benefit Base Federal unemployment tax (FUTA) applies at a gross rate of 6.0% on the first $7,000 paid to each employee, dropping to an effective 0.6% if you paid into a state unemployment fund and qualify for the maximum 5.4% credit.3Internal Revenue Service. Topic No. 759, Form 940 – Employers Annual Federal Unemployment (FUTA) Tax Return
For federal income tax withholding, commissions are classified as supplemental wages. If you pay commissions separately from regular wages, you can withhold at a flat 22% rather than using the employee’s W-4 bracket. For any employee whose total supplemental wages exceed $1 million during the calendar year, the excess is subject to mandatory 37% withholding regardless of what their W-4 says.4Internal Revenue Service. Publication 15 (2026), (Circular E), Employers Tax Guide
A narrow category called statutory employees sits between the two normal buckets. These workers receive a Form W-2 with the “Statutory employee” box checked in box 13, but federal income tax is not withheld from their wages. They report their income and deduct business expenses on Schedule C, unlike regular employees.5Internal Revenue Service. Statutory Employees Social Security and Medicare taxes still apply.
Reporting Commissions Paid to Non-Employees
Commissions paid to independent contractors, agents, or other non-employees follow different reporting rules. For payments made in 2026, you must file Form 1099-NEC for any non-employee who receives $2,000 or more during the calendar year. This threshold increased from $600 for payments made after December 31, 2025, and will be adjusted for inflation starting in 2027.6Internal Revenue Service. Form 1099-NEC and Independent Contractors
Both the recipient’s copy and the IRS filing are due by January 31 of the year following payment. For commissions paid in 2026, that means January 31, 2027. No automatic filing extensions are available for Form 1099-NEC.7Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC
Penalties for Late or Missing Forms
The IRS assesses separate penalties for each form you file late or incorrectly. For 2026, the per-form penalties are:
- Filed within 30 days of the deadline: $60 per form
- Filed between 31 days late and August 1: $130 per form
- Filed after August 1 or not at all: $340 per form
- Intentional disregard: $680 per form, with no maximum cap
Annual maximums apply and scale with business size, running into the millions for larger filers.8Internal Revenue Service. 20.1.7 Information Return Penalties With dozens of commissioned agents, a missed deadline adds up quickly.
Worker Classification Determines Everything
Whether the person earning the commission is an employee or an independent contractor decides which set of rules above you follow: payroll taxes and W-2, or 1099-NEC and no withholding. The IRS evaluates classification based on the degree of behavioral and financial control you exercise over the worker and the nature of the relationship. Misclassifying an employee as an independent contractor exposes you to liability for unpaid employment taxes, interest, and penalties, plus penalties for every missing W-2 and incorrect 1099-NEC.
The Department of Labor applies a separate economic reality test that weighs factors like the worker’s control over how the work gets done, their opportunity for profit or loss, the permanence of the relationship, and whether the work is part of your core business operations. Written contracts matter less than how the relationship actually operates day to day.
Overtime Rules on Commissions
The Fair Labor Standards Act requires that non-discretionary commissions be included in a non-exempt employee’s regular rate of pay when calculating overtime. You cannot pay a base hourly wage, calculate overtime at 1.5 times that wage, and ignore the commissions earned during the same workweek.9U.S. Department of Labor. Fact Sheet 56A: Overview of the Regular Rate of Pay Under the Fair Labor Standards Act (FLSA)
The math: take the employee’s total compensation for the workweek including commissions, divide by total hours worked, and that’s the regular rate. Overtime is then owed at half that rate for each hour over 40, on top of what the employee already received. When commissions are calculated over a longer period than a single workweek, the overtime adjustment is often computed retroactively once the commission amount is finalized. Failure to fold commissions into the overtime calculation is one of the most common FLSA violations in commissioned-sales environments.
Accounting for Clawbacks
Many commission plans include clawback provisions that require repayment when a customer cancels, returns the product, or defaults within a specified period. If you’ve already recognized the commission as an expense, the clawback is recorded as a reduction of that expense or a recovery. If the commission was capitalized as a deferred asset, an early cancellation may trigger an impairment adjustment to write down the remaining asset balance faster than the original amortization schedule anticipated.
Commission agreements should define clawback terms clearly, including the triggering events, the time window, and whether repayment is dollar-for-dollar or prorated. Ambiguity here creates accounting headaches and legal exposure, particularly in states with strict wage payment laws that limit an employer’s ability to deduct amounts from future paychecks.
Documentation That Supports the Numbers
Every commission payment needs a clear paper trail, and the backbone is a written commission agreement. The agreement should spell out the commission rate, the specific event that triggers the payout, the basis of calculation, and when payment will be made. Vague terms like “competitive commission” or “to be determined” create audit risk and potential wage disputes.
Internally, your system needs to track individual sales, match them against commission rates, and calculate the resulting liability. That internal ledger must reconcile to your general ledger. If you’re capitalizing under ASC 340-40, it also needs to tie directly to the Deferred Contract Acquisition Costs asset account. Commission payments should go through an approval workflow before disbursement.
At year-end, reconcile the total commission expense in your general ledger against the cumulative amounts reported on all Forms 1099-NEC and W-2. A mismatch between internal records and external filings signals a control breakdown. Common causes include timing differences between accrual and payment, commissions paid to contractors below the reporting threshold, and simple data entry errors. Resolve discrepancies before filing.
The IRS requires employment tax records for at least four years after the tax becomes due or is paid, whichever is later.10Internal Revenue Service. How Long Should I Keep Records? For general business deductions, the standard retention period is three years from the filing date, extending to six years if income is underreported by more than 25%. There’s no limit if fraud is involved or a return was never filed.11Internal Revenue Service. Topic No. 305, Recordkeeping Given these overlapping windows, keeping commission records for at least seven years is a practical default that covers most scenarios.