This research was conducted to determine the effect of risk perception on purchasing decisions using shopee pay later with consumptive behaviour as moderation. This type of research is quantitative research with an explanatory approach. The population is a student of UIN Malang. The sampling technique used is purposive sampling with the criteria of Shopeepay later users who have used Shopee Pay later at least twice the transaction so that the research sample is as large as 100 respondents. Data collection techniques used questionnaires and were analyzed by moderation regression. The results showed that the risk perception variable significantly affected purchasing decisions using Shopee Pay later. Consumer consumptive behaviour strengthens risk perception's influence on Shopee Pay's later purchase decisions.