Like TheWizard (post 38), I annuitized a TIAA-CREF 403(b) accumulation as a single premium immediate annuity. A small portion of my total purchase was in the Real Estate portfolio, so its payout is subject to variability due to investment performance. The other 95% was in the TIAA traditional annuity, which allows for some annual payout increases beyond the original amount if TIAA has surplus funds (likely due to excess mortality and investment performance of TIAA overall). They announce these increases, if any, at the end of each year, for the following year.
Note especially that TIAA constructs the initial total annual payment using the investment performance of your historical accumulations in various defined tranches during the years you (and your employer) contributed the funds. Then, of course, mortality credits are added, which are determined by your age at time of annuitization.
It's a rather complex calculation, which TIAA allow you to model, using some variables, before you make a decision.
So, here are the numbers:
Original Purchase Amount: $776,000.
Year Purchased: 2015
Full Year Payouts:
2016: $46,258 (initial 6% "return")
2017: $46,494 (0.51% increase)
2018: $46,908 (0.89% increase)
2019: $47,247 (0.72% increase)
2020: $47,787 (1.14% increase)
2021: $47,827 (0.08% increase) This represents a 6.2% return on the initial purchase amount
2022: I will know as of 22 December next year's total
Over five years, the annual payout increased $1,569 (3.4% cumulative)
Total payout has been $305,521 (2016-2021, plus half year of 2015)
Total payout as percent of Purchase Price: 39.4%
I use this as a floor for our annual income and essentially a bond substitute--we own very, very little in bonds via one Vanguard balanced mutual fund). We also receive US SS, Swiss SS, and a Swiss pension. These, plus the TIAA annuity provide about 58% of our income and have allowed us to moderately increase our risk exposure in our dividend growth focused stock portfolio, which provides the other 42%.
This model has served us quite well so far and we sleep well at night.
Hope this helps the OP.
-BB