TSP Dollar Amount Formula for GM

Sep 23, 2013 · Subtract the three percent amount from the EA amount. Divide the difference by two (2). GM is a total of the ½ difference and the three percent. For example an employee receives base and locality pay of $950.40 and contributes $40.00 to TSP. Five percent of $950.40 is $47.52. Three percent of $950.40 is $28.51. $40.00 minus $28.51 equals $11.49. ................
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