Q: As I understand the Voluntary Contribution Plan, eligible employees can start making deposits at any time prior to retirement. At retirement, they can choose to withdraw the funds or purchase a VCP annuity.  Am I correct that after age 59 1/2, I can make a taxable withdrawal from my Thrift Savings Plan and deposit that money into the VCP to be used to purchase a VCP annuity upon retirement? A: Yes. The VCP doesn’t care where you get the money to make the deposit, as long as it is after-tax money.