At 75, the IRS Will Set the Withdrawal Amount on a $900,000 401(k). Affluent Investors Over 60 Are Making Sure It's Empty by Then - 24/7 Wall St.

The IRS gets to decide how much comes out of your 401(k) at 75, and the tax cascade that follows can push your effective marginal rate past 40 percent. There is a narrow window before that clock runs out, and the math on using it looks nothing like convention…