A "Payment Structure" refers to the way payments are organized and made for goods or services. It outlines the terms of payment, including the amount, frequency, and method of payment. Common payment structures include one-time payments, installment plans, and subscription models. Different industries may adopt various payment structures to meet their needs. For example, in the real estate sector, buyers might use a mortgage with monthly payments, while in software services, companies often use a subscription model with recurring monthly or annual fees.