California runs the strictest regime in the country. Under §2751 California Labor Code, any commission arrangement for services performed in the state must be a written contract that explains the computation and payment method, must be signed, and the employer must keep a signed receipt from the employee. There is no verbal-agreement exception. Earned commissions are wages under the Labor Code, so withholding them after termination can trigger §203 waiting-time penalties of up to thirty days of pay. The state also reads its narrow exemptions strictly, so an inside rep classified as exempt purely because of commission income is a frequent audit target.
New York treats commission salespersons as a protected category under Labor Law §191 and §191-c. Employers must furnish a written agreement describing how wages, salary, drawing accounts, commissions, and other compensation are calculated, and disputed earned commissions are presumed owed unless the written terms say otherwise. New York courts construe gaps against the drafting employer, which makes a precise earned-commission definition essential rather than optional.
Texas has no statute forcing commission plans into writing, so the agreement is governed by ordinary contract principles and the Texas Payday Law. That freedom is a trap: without a written plan defining "earned," the Texas Workforce Commission and courts will enforce whatever the parties' conduct and any writing suggest, often unpredictably. A clear written agreement is the employer's only real protection here.
Florida likewise imposes no specific commission-writing statute and follows general contract law, but Florida courts routinely enforce written commission terms exactly as drafted, including post-termination forfeiture clauses, provided the language is unambiguous. A vague Florida plan, by contrast, tends to be read in the employee's favor. The practical takeaway across all four states is identical: the written agreement, not the state, is what protects you, and a US employee termination letter that addresses final pay should always reconcile with the commission plan's payout terms at separation.