The topic of IT/IS investment has been intensely researched for the last four decades. This study presents a bibliometric analysis of IT/IS investment literature published from 1983 to 2020. Totally 766 journal papers published in 419 Scopus-indexed journals by 1,600 unique authors, were analyzed using R Programming language. Both impact and content analysis, including significant, influential aspects (e.g., authors, affiliations, countries, keywords, and journals), research streams, and themes, were included in the analysis.