Flat rate brokerage service is concept where the services available by a brokerage are unbundled completely or bundled into packages offering a wider variety of options to you, the home seller. You pay for the services you need or want without having to purchase the services you do not want (unless required by TREC). In traditional brokerage service the home seller will pay a percentage at closing for the brokerage services whether they used all of the services the broker can provide or not.