OBJECTIVES::  Transcatheter aortic valve implantion (TAVI) is an effective alternative to surgical valve replacement for inoperable patiens with aortic stenosis (AS). This analysis assemed the cost per lenght of stay wheter the ballon-expandable (BE) valve and self-expandable (SE) valve. METHODS:: An administrative claims database containing over 18 million lives (ORIZON, Brazilian Private Health Care, Fee-for-service) was assessed (from jan/2015 until dec/2016), of patients who underwent a BE valve replacement (n=30) and SE valve replacement (n=54). After group identification, the average length of stay (LOS), cost and median differences between groups were assessed thru Kruskal-Wallis method. A significance level of 5% was adopted. RESULTS:: The average cost per lenght of stay the day was BRL 7,553 and BRL 10,906 for BE and SE (p<0.0001) valve, respectively and the cost per patient was BRL 220.384 (IC95% BRL 152.464- BRL 288.308) and BRL 238,410 (IC95% BRL 202,031 - BRL 274,789) for BE and SE valve respectively (include de cost with valve). The treatment with BE valve represented 32% of economic saving comparing with SE CONCLUSIONS::  In the present analisis among patients with high-risk aortic stenosis undergoing TAVR, the use of a balloon-expandable valve should save than use of a self-expandable valve. It could be attributed with the clinical complications, which should be tested in future economic and clinical data.