In general, your Total Service Credit consists of the following:
Membership Service: Any credited service you performed as a TRS member.
Transferred Service: Any service you transferred from an eligible retirement system (only applicable if you transferred your membership to TRS).
Optional Service: Certain eligible service for which you have claimed or purchased credit. For more information, please see the What is optional service credit? FAQ under the Payment for Credit tab.
Chapter 126 Credit (Tier I and II members only): Credit for remaining in active service from October 1, 2000 through June 30, 2001 and from July 1, 2001 through June 30, 2002.