Your make-up contributions will be invested based on your most recent contribution allocation. For example, if you currently allocated 75% of the TSP contributions withheld from your pay to go to the C Fund and 25% to go to the G Fund, your make-up contributions will be allocated in the same manner. If you don't have a contribution allocation on file with the Federal Retirement Thrift Investment Board, the make-up contributions will be invested in the G Fund.
You may also get lost earnings on your make-up contributions. The amount of the lost earnings you receive are based on the contribution allocation in effect at the time the make-up contributions would have been made had you been correctly covered by FERS. For example, suppose you are going to make-up contributions for the period January 11, 1995 to July 6, 1995. During that period you may had allocated 45% of the contributions withheld from your pay to go to the G Fund and 55% to go to the C Fund. The lost earnings on your make-up would be computed as though 45% of your make-up went to the G Fund in 1995 and 55% had gone to the C Fund.
If you didn't have a contribution allocation, the lost earnings will be based on the return of the G Fund.
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