Government-mandated withdrawal timing
Required Minimum Distributions force withdrawals from tax-deferred retirement accounts starting at age 73 (changed from 72 by the SECURE 2.0 Act). The IRS calculates the minimum by dividing account balance by a life expectancy factor that declines with age, ensuring the government collects deferred taxes over the retiree's lifetime.
Failure to take the full RMD triggers a 25% penalty on the shortfall (reduced from 50% in recent tax law), one of the steepest tax penalties in the code. RMDs apply to traditional IRAs, 401ks, and similar tax-deferred accounts, but not Roth IRAs during the account holder's lifetime.
Growing payouts and tax planning
RMD amounts increase over time as the life expectancy divisor shrinks. At 73, the divisor might be 26.5; at 90, it drops to 10.2. This forces larger percentage withdrawals later in life, even as portfolio balances may have grown or shrunk with market returns.
Retirees often use RMD calculations for broader tax planning, including conversions to Roth accounts in years with low income or using qualified charitable distributions to satisfy RMDs without increasing taxable income. Strategic RMD management can significantly reduce lifetime taxes.