An index tab labeling system for use with suspended file folder of the type having vertical slots along an upper margin, the labeling system comprising a flexible index tab having a single layer of flexible material with lugs for insertion into the vertical slots in the file folder. A pad of labels is affixed to the index tab by a releasable adhesive. The pad of labels has multiple labels which are held to each other by releasable adhesive. The user may write index information on the uppermost label and when the index information requires changing, the uppermost label may be peeled off and the next label is made available for index information to be entered thereon. A pad of three labels is considered to be optimum. When all the labels in one pad are used, a new pad of labels may be releasably adhered to the index tab. In an alternative embodiment, each of the labels may be supplied with a portion that does not have a releasable adhesive applied to it. This allows each label to be more easily grasped and removed when a label requires replacement.