Required Minimum Distributions: What They Are and How to Plan
The IRS has been a silent partner in your tax-deferred retirement accounts the entire time. At a certain age, they start collecting — and missing one carries a steep penalty. Here's exactly what RMDs are, how they're calculated, and the strategies that reduce their tax impact.
You spent decades building your retirement accounts — maxing contributions, capturing employer matches, watching the balance grow. What nobody told you clearly enough is that the IRS has been a silent partner in that account the entire time. And at a certain age, they're going to start collecting. Required minimum distributions are the mechanism: mandatory annual withdrawals the government forces you to take from most tax-deferred retirement accounts. Miss one and the penalty is severe. But the bigger surprise is what they do to your overall tax picture — bumping you into a higher bracket, inflating Medicare premiums, and pulling more Social Security into the taxable column, often simultaneously.
What Are Required Minimum Distributions?
RMDs are the IRS's way of ensuring that money deposited pre-tax into retirement accounts doesn't shelter there indefinitely. Since contributions to Traditional 401(k)s and IRAs reduced your taxable income in the contribution year, the government eventually wants its share — as ordinary income at your current marginal rate.
📌 RMDs Required
Traditional IRAs
Traditional 401(k) plans
403(b) and 457(b) plans
SEP IRAs & SIMPLE IRAs
Most inherited retirement accounts
✓ No RMDs Required
Roth IRA (during owner's lifetime)
Roth 401(k) — exempted starting 2024 (SECURE 2.0)
The Roth IRA's freedom from RMDs is one of its most significant and underrated advantages. It lets your money grow and compound on your timeline, not the IRS's — and leaves more flexibility for tax planning in your later years.
The starting age has shifted through legislation, so it's worth being precise. Under the SECURE 2.0 Act signed in late 2022:
Birth Year
RMD Starting Age
Note
Before 1951
Already started
Prior rules applied
1951–1959
Age 73
Current law
1960 or later
Age 75
SECURE 2.0 change
Your first RMD must be taken by April 1 of the year following the year you reach your RMD age. Every subsequent RMD is due by December 31. One important wrinkle: if you delay your first RMD to April 1, you'll take two distributions in the same calendar year — the delayed first and the regular second — which can spike taxable income and trigger IRMAA surcharges. For most people, taking the first RMD in the year it's actually due avoids this problem.
Exception — still working. If you're still working at your RMD starting age and participating in your current employer's 401(k), you can defer RMDs from that specific plan until you actually retire. This doesn't apply to IRAs or old 401(k)s from previous employers.
How RMDs Are Calculated
The IRS calculates a minimum based on two inputs: your account balance on December 31 of the prior year, and your life expectancy factor from the IRS Uniform Lifetime Table. The formula is straightforward — the math is what surprises people.
Prior Year-End Balance ÷ Life Expectancy Factor = RMD Amount
Age 73: $500,000 ÷ 26.5 =$18,868
Age 80: $500,000 ÷ 20.2 =$24,752
Age 90: $500,000 ÷ 12.2 =$40,984
The distribution amount climbs not just because the factor decreases — it's entirely possible for someone's RMD to increase year over year even as they're withdrawing, if investment returns outpace the distributions. This is what turns RMDs from a minor nuisance into a serious tax planning challenge for diligent savers.
The Real Cost of RMDs: More Than Just Withdrawals
Here's where many people get blindsided. The RMD itself isn't always the problem. It's what it does to the rest of your financial picture.
Tax Bracket Creep
Significant pre-tax savings can push RMDs into five figures annually in your mid-to-late 70s. Add Social Security, pension income, or brokerage dividends, and a retiree who expected the 12% bracket suddenly finds themselves in 22% or 24%.
The Social Security Tax Torpedo
Up to 85% of Social Security benefits become taxable once combined income crosses $34,000 (single) or $44,000 (married jointly). Large RMDs push combined income upward, dragging more of your Social Security into the taxable column. This creates an effective marginal tax rate on each additional dollar of RMD income that's higher than your nominal bracket — sometimes dramatically so for retirees in the middle income range.
IRMAA Medicare Premium Surcharges
Medicare Part B and Part D premiums are income-based. In 2024, IRMAA surcharges start above $103,000 for individuals and $206,000 for couples — and they're based on income from two years prior. A large RMD in 2024 means higher Medicare premiums in 2026. Many retirees encounter this with genuine surprise.
RMD Calculator — 10-Year Projection
Free · No sign-up
Calculating…
Advertisement
Strategies to Reduce the RMD Tax Burden
RMDs are foreseeable — and foreseeable problems can be planned around, often years in advance.
⚖️
Roth Conversions Before RMDs Begin
The most powerful tool available. Convert portions of a Traditional IRA to Roth each year in the gap between retirement and your RMD start age — paying tax at today's rates to reduce the pre-tax balance that will eventually be forced out. A 10-year conversion window at the 22% bracket can save dramatically more in avoided 24–32% forced distributions later.
💍
Qualified Charitable Distributions (QCDs)
If you're charitably inclined and over 70½, transfer up to $105,000/year (2024, inflation-indexed) directly from your IRA to a qualifying charity. The transfer counts toward your RMD but is excluded from taxable income entirely — better than taking the distribution, paying tax, and donating the after-tax amount.
📈
Strategic Account Drawdown Order
Standard wisdom says spend taxable accounts first, then tax-deferred, then Roth. But for RMD management, deliberately drawing down Traditional IRA/401(k) balances in your 60s — at controlled, lower rates — can be more efficient than waiting for larger forced distributions in your 70s and 80s.
💼
Consolidate Old 401(k)s Into an IRA
Unlike IRAs, you cannot aggregate 401(k) RMDs across plans — each requires its own distribution. Rolling old employer 401(k)s into a single IRA before RMDs start simplifies administration, reduces errors, and gives you more flexibility in timing withdrawals.
RMD rules for inherited accounts changed significantly with the SECURE Act of 2019 and have generated considerable confusion since. Under current rules, most non-spouse beneficiaries who inherit a retirement account must fully deplete the account within 10 years of the original owner's death. The old "stretch IRA" strategy — spreading distributions over a beneficiary's own lifetime — is largely gone for accounts inherited after January 1, 2020.
Added complexity: if the original owner had already begun taking RMDs before death, beneficiaries must also take annual distributions during the 10-year window (not just clean out the account in year 10). Spousal beneficiaries have more options, including treating the inherited IRA as their own. The inherited IRA rules have been subject to regulatory clarification and are genuinely complex — verify current IRS guidance or consult a tax professional before making distribution decisions.
A Real-World RMD Scenario: Same Assets, Very Different Outcomes
Gerald is 71 with $1.1 million in a Traditional IRA and $220,000 in a Roth IRA. His RMDs start at 73. He lives on $58,000/year and receives $24,000/year in Social Security. Here's the difference planning makes:
👤 Gerald, 71 — Without Planning vs With Planning
Without planning: first RMD at 73 (~$44,000)$44,000 forced income
Plus 85% of $24k SS taxable~$65,000 gross income
Tax bracket (22%) on income he didn't choose$14,300+ in federal tax
With planning: Roth convert $40–50k/yr ages 71–72$80–100k moved tax-free
Lower Traditional IRA balance entering RMD ageSmaller first RMD
ResultMeaningfully less tax & IRMAA exposure
Same assets. Same retirement. The difference is entirely in the two years of deliberate conversion before the forced distributions began. The pre-RMD window is one of the most valuable planning windows you'll ever have.
The penalty is steep: 25% of the amount you failed to withdraw (reduced to 10% if you correct the shortfall within two years under SECURE 2.0 rules). The IRS has a process for requesting a waiver for reasonable cause if you take the missed distribution promptly — but counting on a waiver isn't a strategy. Missing RMDs is an expensive mistake worth avoiding entirely.
Can I take more than the RMD minimum?
Absolutely. The RMD is a floor, not a ceiling. You can withdraw any amount above the minimum — you'll simply owe ordinary income tax on whatever you take. Taking more than required can make sense as part of deliberate tax bracket management in a lower-income year.
Do Roth IRA conversions count toward my RMD?
No — Roth conversions and RMDs are entirely separate transactions. You must take your RMD for the year before doing any Roth conversion. You cannot convert your RMD itself. This sequencing catches people off guard and is worth understanding clearly before acting.
If my RMD pushes me into a higher bracket, can I put the money back?
No. Once distributed, RMD funds cannot be returned to a retirement account. You can reinvest the after-tax proceeds in a taxable brokerage account. This is exactly why managing the pre-tax balance proactively through Roth conversions before RMDs begin is so valuable.
Are RMDs from a 401(k) handled differently than IRA RMDs?
Mostly the same rules apply — same starting age, same calculation method — but with one key difference: you cannot aggregate 401(k) RMDs across accounts the way you can with IRAs. Each 401(k) plan requires its own separate distribution. Rolling old employer 401(k)s into a single IRA before RMDs start simplifies administration and reduces the risk of errors.
RMDs Are Predictable — Which Means They're Plannable
The window to act is the years before RMDs begin. Use the RMD and retirement tax calculators to model your projected distributions, estimate your future tax exposure, and see how Roth conversions and other strategies change the outcome. Your pre-RMD years are some of the most valuable planning years you have.