Before completing the necessary form to purchase your annuity, you should read the Annuities section of the TSP booklet Your TSP Account: A Guide for Beneficiary Participants.
Remember, the annuity that you purchase through the TSP is not the same as a TSP monthly payment, which is one of the other full withdrawal options.
If you have determined that an annuity is appropriate for your needs, you should complete
Keep in mind that there is a $3,500 minimum amount required to purchase an annuity. If you are using only a portion of your account for an annuity, the percentage of your account that you choose when requesting it must equal $3,500 or more of your vested account balance.
If you have both a traditional and a Roth balance in your account, the $3,500 minimum threshold applies to each balance separately. Also, you cannot choose different annuities for each type of balance. The TSP will purchase two identical annuities - one with each balance.
After the TSP receives all of the information and documentation necessary to purchase your annuity, it may take up to several weeks to process your request and disburse your funds.
Your annuity will be purchased from the TSP annuity provider. The annuity provider is competitively chosen by the Federal Retirement Thrift Investment Board, the agency that administers the TSP.
Once the funds for your annuity have been disbursed, you cannot cancel your annuity, change your annuity option, or change your joint annuitant.
Once the money has left your account, you should direct all communications concerning your annuity to the annuity provider. The provider will send you a package of information and an annuity contract. Your monthly annuity payments will begin approximately one month after the annuity is purchased.