After 1598, he assumed some non-acting responsibilities, helping Henslowe and Edward Alleyn manage the business affairs of the company.
Yet he remained an actor as late as 1617, as he appears in the "plots" for plays including Frederick and Basilea (as Heraclius), The Battle of Alcazar (as an ambassador), and 1 Tamar Cam.
As a writer, Rowley belonged to the crowd of collaborating playwrights who kept Henslowe and Alleyn supplied with new drama.
His only extant solo work is When You See Me You Know Me (1603–5), a history of Henry VIII from the death of Jane Seymour to the visit of Charles V. He also wrote a play on Richard III and two apparent comedies, Hard Shift for Husbands and A Match or no Match—all three licensed shortly before his death, and none of which have survived.
On stylistic grounds, H. D. Sykes assigned him a share in The Famous Victories of Henry V, The Taming of a Shrew, and parts of Robert Greene's Orlando Furioso.