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Combining Your Payment Methods
You can combine methods of payment to purchase service credit.
If you wish to purchase service credit using a lump-sum payment (plan-to-plan transfer or check/money order) and also through tax-deferred payment (TDP) deductions, complete the transfer or check payment before you enter into a TDP agreement. The TDP agreement can only be for the remaining service credit after the transfer is complete. Once you receive a receipt for your check or transfer payment, you must then request a new billing statement in miAccount in order to begin your TDP agreement. By making an initial payment for a portion of the service credit, you will reduce the amount of interest you'll be charged on your purchase.
As you approach your retirement or termination, you may want to pay off your TDP agreement balance. You may choose to combine payment methods and send a check/money order or complete a plan-to-plan transfer up to 90 days prior to your termination or retirement.