Federal employees could invest the value of unused annual leave in their Thrift Savings Plans (TSP), if a proposal introduced in the House this week becomes law.  Under the bill, employees could invest the cash value of some or all unused annual leave in their TSP, but the amount invested could not cause employees to exceed annual contribution limits.  The idea of such a benefit for federal employees has been discussed ever since the Internal Revenue Service ruled in 2009 to allow private-sector workers to deposit the cash value of their unused leave in their 401(k) accounts.  It is too early to speculate on the bill’s chances of passing in the House.  However, observers point out that the bill's chances of success are improved by the bipartisan start for the bill (It was introduced by a Democrat and a Republican on the Federal Workforce Subcommittee of the House Oversight and Government Reform Committee) and the fact that it would be a costless (to the taxpayer) benefit increase.  Highlights will follow the progress of this bill and keep readers current on the latest developments.