SmartAsset and Yahoo Finance LLC may earn commission or revenue through links in the content below. With careful planning, $2.5 million can fund a comfortable retirement starting at age 60. But as with any major life transition, retirees must weigh a complex set of variables from taxes to healthcare to ensure their nest egg lasts decades. Though everyone’s situation differs, this level of savings can provide most the flexibility to retire if desired, especially if paired with even modest Social Security ...