A long-time rule of thumb for retirees is that they can safely take out 4% of their nest egg each year without the possibility of running out of funds before they pass away. However, with the bull market run we have recently seen, many question whether this is still a safe bet. Of course, much depends on your asset allocation. If you are in all cash, you are probably looking at only a 2% withdrawal rate until interest rates start rising significantly. Those who keep 20-50% in stock can reasonably draw between 2.5-2.8% per year and the money should last for 40 years, a little over 3% and it should last for 30 years, and just over 6% if you want the portfolio to last for 15 years, according to Morningstar Direct.
https://www.barrons.com/articles/retirement-withdrawal-strategy-4-percent-rule-51639177201