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This first chart depicts the estimated gross monthly retired payments under both retirement options. Taxes and participation in the SBP are not considered. The REDUX jump reflects the cost-of-living catch up adjustment and multiplier re-adjustment at age 62. In comparing your options, focus on the differences on the level of retired pay. You need to determine whether your $30,000 CSB at the 15th year will make up for these reductions.
In the following chart, the amounts shown are the accumulation of after-tax savings from electing the $30,000 CSB at year 15 compared to the accumulation from saving the after-tax difference in the High-36 (High Three Pay) retired pay over the REDUX retired pay. In this case, the savings of extra retired pay in the High-36 option surpasses the accumulated savings from the CSB when the member is 48. This cross-over would happen earlier if after tax earnings from the mutual fund/savings were much less than 8 percent and would happen later if higher than 8 percent.
These results will vary depending on your choices and the assumptions. The above example is only a simple comparison of the essential differences between electing CSB/REDUX or accepting High-36. See the Considerations section for a more in-depth discussion on factors that will affect the results depicted.