The Thrift Savings Plan (TSP) Annuity Calculator can help you estimate how much your monthly annuity payments would be if you have the TSP purchase an annuity for you when you make your request for a full withdrawal.

The amount of your monthly annuity payments depends to a large degree on the size of your TSP account balance (or the portion of your account that you intend to use to purchase the annuity).  In addition, the type of annuity you choose, your age (and your joint annuitant's age in the case of a joint life annuity), and the interest rate index at the time that the TSP purchases your annuity, affect the monthly amount that you will receive.