How long is a 5500 extension? 895 viewsOctober 10, 2022Banking and Finance 0 Sam Smith11.38K March 19, 2021 0 Comments 1 Answer ActiveVotedNewestOldest 0 Blogolu28.38K Posted March 29, 2021 0 Comments 3½ months maximum automatic extension of the Form 5500 and Form 5500-SF filing dates is 3½ months, or November 15 for calendar year plans. The new extension would have applied to filings made in 2017. Register or Login