Abstract
The internet is currently a necessity for every human activity, basically the internet for now cannot be separated from human life. With the rapid development of technology at this time almost everyone uses the internet in everyday life, this is evidenced by a survey conducted by APPJI (Association of Indonesian Internet Service Providers) from the results of a survey conducted in 2024 internet usage in Indonesia reached 221 million people with a percentage of 79.5% more 1.4% than in 2023. At this time the existing payment system is only cash where employees from PT will visit the homes of customers and provide payment receipts. As for customers who are recorded, there are approximately 1000 users and in its implementation sometimes there are obstacles because there are many users, so recording sometimes does not match the existing payment data. And it often happens that it is wrong to input the name of the user who has paid and who has not. Based on the above problems, payment gateway is a solution to make it easier for customers or businesses to make payments that are faster and safer so that they can save time checking payments and monitoring which customers are due for payment. With black box testing, it can be concluded that the system created runs smoothly without any errors.