The goal of the project is to integrate a payment terminal into existing web-based Point of Sale system that is widely used in beauty salons in Finland. There are two types of payment terminals to choose from, one from each payment service provider Nets and Point. The aim is to get at least one of them to interact with the Point of Sale system. In this case interacting means that an amount of payment automatically flows from the Point of Sale system to payment terminal that is instantly ready to receive a payment card and a PIN code from a customer. During payment the information given by payment terminal can also be seen on the Point of Sale system screen. Thus there is no need to manually press the amount of payment into payment terminal. This fastens the cashing process and makes it more secure.