While both terms may seem similar, they actually refer to two different processes. Order to cash (O2C) is the process of fulfilling a customer's order, while quote to cash (Q2C) encompasses the entire sales cycle from creating a quote or estimate to receiving payment for the products or services sold. O2C begins when an order is placed and ends when the customer pays for the goods or services received. This process includes creating invoices, processing payments, and issuing refunds or credits as needed. On the other hand, Q2C starts with generating a quote or estimate and ends when the payment is received. In between, there are a few steps, such as creating contracts, sending invoices, and collecting payments.