Forced withdrawals from untouched 401(k) accounts trigger higher tax brackets and Medicare premiums for retirees under IRS rules.
A retired engineer with $1.6 million in assets, including a $1.1 million 401(k) left with a former employer, faces a tax spike at age 73 due to required minimum distributions (RMDs). The IRS mandates withdrawals at marginal tax rates, inflating taxable income regardless of financial need.
Under SECURE 2.0, RMDs begin at age 73, with untouched balances potentially growing to $1.4 million. This generates mid-five-figure annual withdrawals, pushing retirees into higher tax brackets and increasing Medicare premiums. Vanguard research highlights that unrolled 401(k)s often incur higher fees and limited investment options.
Strategies like rolling over to an IRA or executing Roth conversions between ages 66 and 72 can mitigate tax burdens, but 401(k) plans block tax-free charitable distributions available to IRAs.