Required Minimum Distributions: What You Need to Know

Required minimum distributions are the IRS's mechanism for ensuring that the tax-deferred retirement savings accumulated over a lifetime of working are eventually taxed rather than remaining indefinitely in tax-sheltered accounts. Starting at age 73 (under the Secure 2.0 Act changes effective 2023), account holders of traditional IRAs, 401ks, 403bs, and most other tax-deferred retirement accounts must begin taking minimum distributions whether they need the income or not.

For people who have saved diligently throughout their careers, RMDs can be substantial and can create unexpected tax burdens. A $1 million traditional IRA generates an RMD of approximately $36,000 in the first year, which is added to any other income and potentially pushes the retiree into a higher marginal bracket, increases Medicare premiums, and reduces the tax efficiency of the overall retirement income plan.

This guide explains how RMDs are calculated, the specific deadlines and rules that apply, the consequences of missing an RMD, strategies for minimizing the tax impact, and how Roth accounts avoid this requirement entirely.

How RMDs Are Calculated

The required minimum distribution is calculated by dividing the prior December 31 account balance by the applicable life expectancy factor from the IRS Uniform Lifetime Table (or the Joint Life and Last Survivor Table if the sole beneficiary is a spouse more than 10 years younger). The life expectancy factor decreases each year, meaning a larger percentage of the account must be distributed.

At age 73, the Uniform Lifetime Table factor is 26.5, meaning you divide the account balance by 26.5 to get the required minimum distribution. A $500,000 IRA balance requires a distribution of approximately $18,868 in the first year. At age 80, the factor is 20.2, requiring a distribution of approximately $24,752 from the same starting balance if it had not changed.

The RMD is calculated separately for each account but can sometimes be aggregated. IRA RMDs can be satisfied by taking the total from any combination of your IRAs. 401k and 403b RMDs must generally be taken separately from each employer plan, though there are some aggregation allowances.

Deadlines and Rules

The first RMD deadline is April 1 of the year after you turn 73. All subsequent RMDs must be taken by December 31 of each year. Delaying the first RMD to April 1 means taking two RMDs in that calendar year (the delayed first one by April 1 and the second by December 31), which stacks income and potentially increases taxes significantly.

The penalty for failing to take a required minimum distribution was reduced from 50 percent to 25 percent of the missed RMD amount under the Secure 2.0 Act, further reduced to 10 percent if the mistake is corrected timely. Despite the reduced penalty, missing an RMD is still costly and entirely avoidable with proper planning.

Roth IRAs are not subject to RMDs during the account owner's lifetime, which is one of the most significant advantages of Roth accounts for higher-net-worth retirees who do not need to draw down their retirement savings for living expenses. Roth 401k balances were not subject to RMDs starting in 2024 under Secure 2.0.

Strategies to Minimize RMD Tax Impact

Roth conversions before age 73 reduce the traditional IRA balance subject to RMDs. Converting traditional IRA funds to Roth during lower-income years between retirement and age 73 (or during the early retirement years if income is lower) reduces the future RMD burden while paying taxes at what may be a more favorable rate.

Qualified Charitable Distributions (QCDs) allow IRA owners age 70½ and older to donate up to $105,000 per year (2024, indexed for inflation) directly from their IRA to a qualified charity. The QCD satisfies the RMD requirement without the distribution being included in taxable income. For retirees who are charitably inclined, this is one of the most tax-efficient giving strategies available.

Strategic account spending in the years before 73, drawing down traditional IRA balances for living expenses or Roth conversion rather than taxable account assets, reduces the size of the traditional accounts and therefore the future RMD burden. This requires modeling the tax-optimal asset liquidation order across account types.

Inherited IRAs and RMD Rules for Beneficiaries

The Secure Act of 2019 significantly changed the rules for inherited IRAs. Under current rules, most non-spouse beneficiaries who inherit an IRA after December 31, 2019 must fully distribute the inherited account within 10 years of the original owner's death. The 10-year rule replaced the prior stretch IRA option that allowed beneficiaries to take distributions over their own life expectancy.

Surviving spouses have more flexible rules and can roll an inherited IRA into their own IRA, treat the inherited IRA as their own, or take distributions under specific spousal inherited IRA rules. Minor children of the original owner, chronically ill or disabled beneficiaries, and beneficiaries within 10 years of age of the decedent are also eligible for extended distribution schedules.

The tax implications of the 10-year rule are significant for non-spouse beneficiaries who inherit large traditional IRAs. They must fully distribute a potentially large account within 10 years, potentially at high marginal rates. This reality makes Roth conversion before death a valuable legacy planning strategy for original IRA owners who want to minimize the tax burden on their heirs.

Final Thoughts

Required minimum distributions are an inevitable feature of traditional tax-deferred retirement accounts that require proactive planning to manage efficiently. The tax impact of large RMDs that push income into higher brackets, increase Medicare premiums, and affect Social Security taxation can be substantial for people with large traditional account balances.

The most effective mitigation strategies are Roth conversions in the years before 73 to reduce the traditional account balance, qualified charitable distributions to satisfy RMDs without taxable income for charitably inclined retirees, and strategic spending from traditional accounts in early retirement to reduce future RMD exposure.

Know your RMD deadlines, calculate your required amounts, and plan your tax strategy around these mandatory distributions. The penalty for getting it wrong is avoidable; the tax impact of getting it right is manageable.