An employer can generally change your commission structure without giving formal notice, but only for sales and work you perform after the change takes effect. What they cannot do is reach back and reduce commissions you already earned under the old plan. Whether a change without notice is legal in your specific situation turns on your employment agreement, your state’s wage laws, and whether the new terms were applied prospectively or retroactively.
Earned Commissions vs. Future Commissions
This is the line that decides most commission disputes. A prospective change applies only to work you do after the new structure takes effect. A retroactive change tries to recalculate pay for work you already completed. Prospective changes are usually legal. Retroactive changes almost never are.
Once you complete the work that triggers a commission under the existing agreement, that commission becomes an earned wage. Cutting it or withholding it is wage theft, no different from an employer docking your hourly pay after you already worked the hours. The U.S. Department of Labor defines a sales commission as money paid upon completion of a task, which means the obligation to pay attaches when the work is done, not when the company gets around to issuing the check.1U.S. Department of Labor. Commissions
So if you closed a deal in April under a 5% plan, your employer cannot announce in May that April commissions will now be paid at 3%. That commission was earned under the old terms, and you have a legal right to the full amount.
When Is a Commission Actually Earned?
Most fights come down to this question. Your employer says you haven’t earned it yet. You say you have. The answer depends on the triggering event defined in your commission plan or employment agreement.
A commission typically vests when you satisfy the specific conditions your agreement spells out. That might be closing the sale, getting the customer to sign, the company receiving payment, or hitting a defined target. The payout date can be later, but your right to the money usually locks in at the triggering event.
Watch for contract language designed to blur this line. Some employers write in clauses saying commissions are only payable if you remain employed on the payout date, effectively converting earned wages into something the company can claw back if you leave. These clauses are not automatically enforceable. Many states treat earned commissions as vested wages that survive termination, regardless of the contract. Enforceability of forfeiture provisions varies significantly by state.
What Your Employment Agreement Controls
Your contract, offer letter, or standalone commission plan is the starting point. When reviewing it, look for:
- A reservation of rights clause allowing the employer to modify the compensation plan at its discretion. This clause gives the employer broad authority to make prospective changes.
- Modification procedures, such as a requirement for written notice or a specific lead time before new terms take effect.
- The commission calculation formula, including rate, sales base, and any tiers or thresholds.
- The triggering event that causes a commission to be earned.
- Any forfeiture provision tying payment to continued employment through the payout date.
An agreement with a clear reservation of rights clause gives employers significant flexibility to change future commissions, sometimes with little or no advance warning. Without that clause, a unilateral change to your pay structure is more likely to be treated as a breach of contract. Either way, no contract language can retroactively strip you of commissions already earned under the existing terms.
When There Is No Written Agreement
Not every commission arrangement lives in a signed document. Where no formal contract exists, courts can find an implied contract based on the employer’s conduct. Verbal promises from a manager, employee handbook policies, or a consistent pattern of commission payments over time can all create enforceable obligations.
If your employer paid you a 10% commission on every sale for the past three years, that history is evidence of the terms of your unwritten agreement. The employer cannot retroactively refuse to pay commissions earned under that established practice. Proving an implied contract is harder than pointing to a signed document, which is exactly why several states now require commission agreements to be in writing.
At-Will Employment and Continued Work as Acceptance
In at-will employment, employers have broad authority to change compensation going forward. The legal theory: by continuing to work after being told about new terms, you are deemed to have accepted them. Your continued labor is the consideration that makes the new arrangement binding.
That does not mean employers can quietly change your pay and never tell you. Some states require advance written notice before any change to compensation takes effect, and even states without an explicit notice rule generally expect employees to be informed before working under new terms. A change slipped into effect without any communication is vulnerable to challenge on good-faith grounds.
The practical consequence matters if you disagree with the change. Once you learn about it, you need to act. Continuing to work without objecting weakens your position because it looks like acceptance. If you dispute the new terms, put your objection in writing immediately.
The Federal Minimum Wage Floor
Whatever your commission plan says, federal law sets a hard floor. The Fair Labor Standards Act requires that your total pay average at least the federal minimum wage of $7.25 per hour for every hour worked.2Office of the Law Revision Counsel. 29 USC 206 – Minimum Wage If a commission restructuring drops your effective hourly rate below that threshold in any workweek, your employer must make up the difference.
State Law Variations on Notice and Written Agreements
State wage laws add layers of protection on top of federal minimums, and the specifics vary enough that a change perfectly legal in one state can be a violation next door.
Several states, including California, Arizona, Arkansas, and Louisiana, require commission agreements to be in writing, with the calculation method and payment terms spelled out. In those states, an employer who changes your commission plan without providing a new written agreement may be violating the statute regardless of whether the underlying change is reasonable.
Some states also mandate advance notice before any change to pay structure takes effect, though the required timeframe ranges from a simple notification before the next pay period to no specifically defined number of days. Other states define commissions as “wages” under their labor codes, which triggers the same protections against withholding that apply to hourly or salaried pay. Because these rules differ so widely, checking your own state’s labor department website before doing anything else is worth the time.
If the change is severe enough that you are considering resigning, be aware that a substantial unilateral pay cut can qualify as “good cause” for quitting in many states, preserving your eligibility for unemployment benefits. The threshold and analysis vary by state, so check your state’s unemployment agency guidance before you decide.
Retaliation Is Illegal
Some employees hesitate to challenge a commission change because they fear being fired or punished. Federal law addresses this directly. The FLSA makes it illegal for an employer to discharge or discriminate against any employee for filing a wage complaint, participating in a proceeding related to wage violations, or testifying in one.3Office of the Law Revision Counsel. 29 USC 215 – Prohibited Acts
Retaliation can take forms less obvious than firing. Cutting your pay further, reassigning your accounts, denying a promotion, or shrinking your territory after you raise a wage dispute can all count as illegal retaliation if the action would discourage a reasonable person from asserting their rights. State laws often add protections on top of the federal baseline.
What to Do If the Change Looks Illegal
If you believe your employer has retroactively cut earned commissions or made a change that violates your contract or state law, move quickly. Delay costs you evidence and legal options.
Document Everything
Gather and preserve every record related to your commission arrangement:
- Employment contracts, offer letters, and commission plan documents, both old and new versions
- Pay stubs showing commission payments before and after the change
- Sales records, CRM reports, and proof of deals you closed
- Emails, texts, or memos discussing the change or your objection to it
- Employee handbook provisions related to compensation
If your employer announced the change verbally, write down what was said, when, and who was there. Send a follow-up email confirming your understanding. That creates a written record even when the employer chose not to put anything in writing.
File a Wage Claim or Lawsuit
If talking to your employer does not resolve it, you can file a wage claim with your state’s department of labor. These agencies investigate complaints and can order the employer to pay withheld commissions. State filing deadlines typically range from 180 days to six years.
You can also sue under the FLSA in federal court. The federal deadline is two years from the violation, or three years if your employer’s conduct was willful, meaning they knew they were breaking the law.4Office of the Law Revision Counsel. 29 USC 255 – Statute of Limitations Winning an FLSA claim can mean recovering the unpaid commissions plus an equal amount in liquidated damages, effectively doubling what you are owed.5Office of the Law Revision Counsel. 29 USC 216 – Penalties
The clock runs from the date of the violation, not the date you discover it. If your employer has been underpaying commissions for months, earlier violations can become time-barred while you wait.