Louis Litt officially becomes for the first time in Season 5, Episode 10 ("Faith") , which takes place approximately 5 years into the show's timeline.
Louis is arguably a better lawyer than Harvey regarding the minutiae of the law. He knows the code, the precedents, and the financials. Yet, he lacks Harvey’s charisma and Jessica’s strategic vision. His delayed promotion highlights a cynical reality of corporate law: competence is often secondary to politics and likability. Louis doesn't get the job because he deserves it; he gets it when he becomes a threat to the power structure. when does louis become senior partner
Louis’s rise to senior partner was far from straightforward, often overshadowed by his intense rivalry with Harvey Specter. While Louis was technically promoted to before Harvey, Harvey was promoted to senior partner first, a slight that deeply stung Louis. Louis Litt officially becomes for the first time