The safe withdrawal rate is a statistically likely (inflation adjusted) percent of your at-retirement savings that you can withdraw every year and be at >= 0 wh

The safe withdrawal rate is a statistically likely (inflation adjusted) percent of your at-retirement savings that you can withdraw every year and be at >= 0 when you die. It's a very convenient heuristic for thinking about the effect for the large chunk of money has upon your life -- it has effectively the same behavior as the annuity you describe. It definitely has an impact, but if you use it to retire earlier, it would shave about 10 years off of your projected retirement time. so the impact it has will be some years down the road. In my case, I had a fairly similar thing happen---about ten years of income earned over two years---because my non-day-job income is highly variable. I was able to endow the next 20 years of my charitable giving, support several elections that I wanted to contribute to, and plan to retire about 10 years earlier. Lovely impact, but it didn't substantially change my day-to-day life. The only thing I did that I probably would not have otherwise done was to buy a new car instead of trying to have my old one repaired one more time.)