At what age can penalty-free withdrawals for medical expenses begin if the unreimbursed amount exceeds 7.5% of AGI?

Withdrawals for medical expenses from a retirement account can be made without incurring the early withdrawal penalty once the taxpayer reaches age 59½. However, before this age, if an individual has unreimbursed medical expenses that exceed 7.5% of their adjusted gross income (AGI), they can withdraw funds from their retirement accounts without facing the 10% penalty that usually applies to early withdrawals. It’s crucial to note that while funds can be withdrawn penalty-free for medical expenses if they meet the necessary criteria, normal income tax will still apply to those withdrawals.

The other ages mentioned in the options do have significance in retirement planning and tax considerations, but they do not specifically pertain to the penalty-free withdrawal for unreimbursed medical expenses under the scenario described. Thus, knowing that the threshold for penalty-free withdrawals for medical expenses is linked to age 59½ helps clarify why this choice is appropriate within the context of the question.