This research work was born to address the problem of the negative impact generated by defective products of Masisa Peru during 2022 on its profitability, given that according to the background researched, it is certain that these defective products generate higher operating costs and customer dissatisfaction, thus resulting in lower profits; The main objective of the study is to determine the influence that the quality of these products has on the company's profits, for which a qua entitative methodology with causal descriptive scope was used, and it was executed through the documentary content analysis technique of the historical records corresponding to the number of defective units per month, the number of good products, total sales, costs and profitability obtained during the period 2022 in order to establish the possible relationship between these variables. The results showed through a linear regression statistical model that defective products have a significant negative correlation that explains almost 80% of the variability in profitability; however, a strong linear connection between melamine in good condition and sales or operating costs was not found, but this does not eliminate the possibility that in the long term there could be a strong relationship between defective products and costs, if the company continues with its current economic activity and does not implement corrective measures. Therefore, it was concluded that the poor quality represented by defective products causes economic losses by reducing profits, as well as this negative relationship generates an adverse effect on profits, causing economic losses, customer dissatisfaction, bad reputation, and even legal problems.