According to TREC Rule 535.147, you are allowed to rebate some of your fee or commission to a party in the transaction if you have written consent from your client and sponsoring broker.

If you plan to advertise that you’re willing, with your sponsoring broker’s consent, to rebate some of your commission, your ad must disclose whether the rebate is subject to any restrictions, such as the use of a certain service provider or the approval of a lender. If you are rebating to the other party in the transaction, then it must also say the rebate is subject to your client’s consent.

You cannot pay anyone in a way that misleads a broker, lender, title company, or governmental agency regarding the transaction or the buyer’s financial resources or obligations.