This study aims to analyze and investigate the factors that influence the extra buying of a product's matching information from online recommendations. This study is a quantitative study, conducted on consumers who have made transactions from online recommendations. While the object of research focused on the variables expectations, perceived quality, perceived value, satisfaction, perceived fitness, price comparisons, budget constraints and extra buying. Methods of data collection is done by using primary data obtained by distributing questionnaires directly to consumers who have been shopping online from one of the e-commerce portal in Indonesia. The determination of the number of samples was done by nonprobability sampling method with purposive sampling technique and obtained as many as 129 respondents. Furthermore, the data in the analysis using Structural Equation Model (SEM) method with AMOS 20 programme. The results of this study indicate that 1) Expectations have a positive effect on perceived quality. 2) Perceived quality has a positive effect on perceived value. 3) Expectations have no effect on perceived value. 4) Perceived quality has a positive effect on satisfaction. 5) Perceived value has a positive effect on satisfaction. 6) Expectation has positive effect on satisfaction. 7) Perceived fitness has no effect on perceived quality. 8) Perceived fitness has no effect on perceived value. 9) Perceived fitness has a positive effect on satisfaction. 10) Perceived fitness positively affects extra buying. 11) Satisfaction positive effect on extra buying. 12) Budget constraints have a positive effect on price comparisons. 13) Price comparisons positively affect the satisfaction. / Penelitian ini bertujuan untuk menganalisis dan menginvestigasi faktorfaktor yang mempengaruhi extra buying dari kecocokan informasi suatu produk dari rekomendasi online. Penelitian ini merupakan penelitian kuantitatif, yang dilakukan pada konsumen yang pernah melakukan transaksi dari rekomendasi online. Sedangkan objek penelitian difokuskan pada variabel-variabel expectations, perceived quality, perceived value, satisfaction, perceived fitness, price comparisons, budget constraints dan extra buying. Metode pengumpulan data dilakukan dengan menggunakan data primer yang diperoleh dengan cara menyebarkan kuesioner secara langsung kepada konsumen yang pernah berbelanja online dari salah satu portal e-commerce di Indonesia. Adapun penentuan jumlah sampel dilakukan dengan metode nonprobability sampling dengan teknik purposive sampling dan diperoleh sebanyak 129 responden. Selanjutnya, data di analisis menggunakan metode Structural Equation Model (SEM) dengan program AMOS 20. Hasil penelitian ini menunjukkan bahwa 1) Expectations berpengaruh positif terhadap perceived quality. 2) Perceived quality berpengaruh positif terhadap perceived value. 3) Expectations tidak berpengaruh terhadap perceived value. 4) Perceived quality berpengaruh positif terhadap satisfaction. 5) Perceived value berpengaruh positif terhadap satisfaction. 6) Expectation berpengaruh positif terhadap satisfaction. 7) Perceived fitness berpengaruh positif terhadap perceived quality. 8) Perceived fitness tidak berpengaruh terhadap perceived value. 9) Perceived fitness berpengaruh positif terhadap satisfaction. 10) Perceived fitness berpengaruh positif terhadap extra buying. 11) Satisfaction berpengaruh positif terhadap extra buying. 12) Budget constraints berpengaruh positif terhadap price comparisons. 13) Price comparisons berpengaruh postif terhadap satisfaction.