You spent decades building a 401(k) or traditional IRA. The balance grew, the tax deferral worked exactly as designed, and now you’re approaching retirement with real money set aside. That’s the good news.
Here’s what most retirement guides don’t explain clearly: the same tax deferral that helped you build that balance eventually creates a forced income event the IRS controls, not you. It’s called a required minimum distribution, and for retirees with large traditional account balances, it can quietly do three things at once: raise your income tax bill, pull more of your Social Security benefits into taxable territory, and increase your Medicare premiums.
None of those outcomes is inevitable. But avoiding them requires understanding how the three systems interact, and acting before the forced withdrawals begin.
Quick answer: Required minimum distributions (RMDs) are annual withdrawals the IRS requires from traditional 401(k)s and IRAs starting at age 73 (or 75 if born in 1960 or later). Because RMDs count as ordinary income, a large withdrawal can push more of your Social Security benefits into the taxable column and trigger Medicare Part B and Part D surcharges. Planning withdrawals before RMDs begin, and holding assets outside the stock and bond markets, can reduce all three pressures.
What’s at stake: the three-way squeeze
Before getting into the mechanics, it helps to see the full picture. A single forced withdrawal can move three levers in the same year:
| Pressure point | How RMDs connect | Timing |
|---|---|---|
| Income tax | RMDs are taxed as ordinary income, potentially pushing you into a higher bracket | Same year as the withdrawal |
| Social Security taxation | RMDs raise your combined income, increasing the taxable share of your benefit | Same year as the withdrawal |
| Medicare premiums | Higher income triggers IRMAA surcharges on Part B and Part D | Two years after the withdrawal |
The compounding effect is what catches retirees off guard. A 401(k) balance large enough to fund a comfortable retirement is also large enough to tax your Social Security and raise your Medicare bill. Understanding each piece separately makes the whole picture easier to manage.
What required minimum distributions actually are
A traditional 401(k) or IRA lets you invest pre-tax dollars, which lowers your taxable income during your working years. In exchange, the IRS expects ordinary income tax on those dollars eventually. It will not wait indefinitely.
Per the IRS, your required minimum distribution is calculated each year by dividing your prior year-end account balance by an IRS life-expectancy factor from the Uniform Lifetime Table. You can always withdraw more than the minimum, but never less without facing a penalty.
RMD start ages under SECURE 2.0
The SECURE 2.0 Act reshaped when RMDs begin. Here’s where things stand:
| Birth year | RMD begins at age | First RMD due by |
|---|---|---|
| 1950 or earlier | 70½ or 72 (legacy rules) | Already in effect |
| 1951 – 1959 | 73 | April 1 after turning 73 |
| 1960 or later | 75 | April 1 after turning 75 |
Source: IRS; SECURE 2.0 Act.
One timing trap worth knowing: your first RMD can be delayed until April 1 of the year after you reach RMD age. But doing so stacks two RMDs into a single tax year, which can significantly inflate your income for that year and push you into a higher bracket. Taking the first distribution in the calendar year you reach RMD age avoids that problem.
What happens if you miss one
The penalty for missing an RMD is steep: up to 25% of the amount you failed to withdraw, reduced to 10% if you correct the shortfall within two years. SECURE 2.0 cut this penalty from the prior 50%, but it’s still substantial enough that setting up automatic distributions is a common safeguard.
Two things RMDs apply to: Traditional IRAs, SEP IRAs, SIMPLE IRAs, and most employer-sponsored plans including 401(k)s, 403(b)s, and 457(b)s. Roth IRAs and Roth 401(k)/403(b) accounts are not subject to RMDs for the original owner during their lifetime.
Pressure point one: RMDs and your income tax bracket
This one is the most straightforward of the three, but it surprises people anyway.
RMDs are taxed as ordinary income at your marginal rate, the same as wages. If your only income in retirement were Social Security and modest investment returns, you might stay in a low bracket. Add a large RMD on top, and your effective rate can climb quickly.
The math compounds over time, too. Because RMDs are calculated using a life-expectancy factor that shrinks each year, the required withdrawal grows as a percentage of your balance even if the balance stays flat. A retiree who turned 73 this year must withdraw roughly 3.77% of their eligible account balance. By age 85, that factor rises to around 5.35%. A growing balance plus a shrinking divisor means larger and larger forced withdrawals.
The account that was supposed to fund your retirement can end up generating more taxable income than you need or want, year after year.
That’s the core tension: you built the balance to have flexibility in retirement, but RMDs remove some of that flexibility by dictating both the timing and the minimum amount of income you must recognize.
Pressure point two: how RMDs make Social Security taxable
Social Security benefits are not automatically tax-free in retirement. The IRS uses a figure called provisional income (also called combined income) to determine how much of your benefit is subject to federal tax. The formula is:
Provisional income = adjusted gross income (excluding Social Security) + tax-exempt interest + 50% of annual Social Security benefits
A large RMD lands directly inside that calculation because it raises your adjusted gross income. Push provisional income high enough and a larger share of your benefit becomes taxable.
How the thresholds work
According to IRS Publication 915 and confirmed by the Congressional Research Service:
| Filing status | 0% taxable | Up to 50% taxable | Up to 85% taxable |
|---|---|---|---|
| Single / Head of household | Under $25,000 | $25,000 – $34,000 | Over $34,000 |
| Married filing jointly | Under $32,000 | $32,000 – $44,000 | Over $44,000 |
| Married filing separately | Most cases: 85% regardless |
The threshold problem that doesn’t get enough attention
These thresholds have not been adjusted for inflation since they were written into law in the 1980s and 1990s. Every year, cost-of-living increases push more retirees over the lines without the lines ever moving.
A couple receiving average Social Security benefits plus a modest IRA withdrawal can easily find a portion of their benefit taxed. In 1983, that outcome was designed for higher-income households. Today, it applies to a much broader swath of retirees, simply because wages, benefits, and account balances have grown while the thresholds stayed frozen.
The practical result: for retirees already close to the 85% threshold, even a modest RMD doesn’t just add income, it converts previously untaxed Social Security income into taxable income at the same time. The effective marginal cost of that RMD dollar is higher than it looks on paper.
Pressure point three: how RMDs raise your Medicare premiums
The third pressure point arrives on a delay, which is part of why it catches people off guard.
Higher-income Medicare beneficiaries pay an Income-Related Monthly Adjustment Amount (IRMAA) on top of their standard Part B and Part D premiums. Per the Social Security Administration, IRMAA is based on your modified adjusted gross income (MAGI) from two years prior. Your 2026 Medicare premiums are set by your 2024 tax return. An RMD taken today can raise your Medicare cost two years later.
2026 Medicare Part B premiums with IRMAA
Based on 2024 MAGI. Source: Social Security Administration / CMS.
| 2024 MAGI (single) | 2024 MAGI (married joint) | Monthly Part B premium |
|---|---|---|
| $109,000 or less | $218,000 or less | $202.90 (standard) |
| $109,001 – $137,000 | $218,001 – $274,000 | $284.10 |
| $137,001 – $171,000 | $274,001 – $342,000 | $405.80 |
| $171,001 – $205,000 | $342,001 – $410,000 | $527.50 |
| $205,001 – $499,999 | $410,001 – $749,999 | $649.20 |
| $500,000 or more | $750,000 or more | $689.90 |
The cliff that costs $1,148 per dollar
IRMAA brackets have no phase-in. Exceeding a threshold by a single dollar triggers the full surcharge for that entire tier for the full year.
According to Yahoo Finance’s analysis of the 2026 IRMAA brackets, a single filer with 2024 MAGI of exactly $109,000 pays the standard $202.90 monthly Part B premium in 2026. At $109,001, that premium jumps to $284.10, an extra $81.20 per month. Add the Part D surcharge and that single dollar of additional MAGI triggers roughly $1,148 in added Medicare costs for the full year.
For a married couple where both spouses are enrolled in Medicare, the surcharges apply per person, so the exposure is roughly double.
The two-year lookback is the hidden risk. A large Roth conversion or an unexpectedly high RMD in one year can quietly set up a higher Medicare bill two years later, well after the income event has been forgotten. Coordinating withdrawals and conversions with the IRMAA thresholds is one of the most underappreciated pieces of retirement income planning.
How to plan around the squeeze before RMDs begin
The window that matters most is the stretch between leaving work and the year RMDs start. Income is often lower in those years, which creates room to act before forced withdrawals arrive and stack on top of Social Security.
Consider Roth conversions in lower-income years
Moving money from a traditional 401(k) or IRA into a Roth IRA means paying tax now, in years when your bracket may be lower than it will be once RMDs begin. Qualified Roth withdrawals are not taxed, and Roth IRAs are not subject to RMDs during the original owner’s lifetime. That reduces future provisional income, which in turn reduces both Social Security taxation and IRMAA exposure.
The conversion math requires care. Converting too much in one year can itself trigger higher brackets or IRMAA. The goal is to fill up lower brackets deliberately, not to convert everything at once.
Take measured withdrawals before Social Security and RMDs stack
Many retirees stop drawing from their accounts the moment they retire and wait for Social Security to start. That leaves income low in early retirement, but it also means missing the window to reduce the traditional balance before RMDs are mandatory. Taking modest distributions in the years before 73 or 75 can flatten the income spike that arrives when everything turns on at once.
Watch the IRMAA cliffs two years out
Because Medicare looks back two years, the income you report at 71 can shape the premium you pay at 73. Tracking your MAGI against the IRMAA thresholds each year, and coordinating conversions and withdrawals around those lines, avoids accidental surcharges that could have been avoided with planning.
Diversify into assets that don’t compound the RMD problem
A 401(k) heavily concentrated in equities grows the very balance that drives larger future RMDs. Holding a portion of retirement wealth in assets with low correlation to the market can temper that concentration.
Precious metals have historically behaved differently from stocks and bonds. According to World Gold Council data, gold has a long record of low correlation with equities, and during multiple major market downturns since 2000, gold posted positive returns while equity markets declined. As part of a broader retirement plan, a measured allocation to physical gold or silver inside a self-directed IRA adds an asset class that doesn’t move in lockstep with the market, which can help moderate the balance trajectory that drives RMD size over time.
Worth noting: Precious metals are typically discussed as a diversification tool, not a core holding. A measured allocation, often cited at up to roughly 10-15% of a portfolio, is how most retirement professionals approach the asset class. The goal is balance, not concentration in any single category.
Key takeaways
- RMDs begin at age 73 for those born 1951-1959 and at 75 for those born in 1960 or later. Missing one carries a penalty of up to 25% of the amount not withdrawn.
- RMDs are taxed as ordinary income, which can push retirees into a higher bracket and increase the share of Social Security benefits subject to tax.
- Up to 85% of Social Security benefits can become taxable once provisional income exceeds $34,000 (single) or $44,000 (married filing jointly). These thresholds are frozen and have not moved since the 1980s and 1990s.
- Medicare IRMAA surcharges operate as hard cliffs: one dollar over a threshold triggers the full surcharge for that tier. For 2026, a single filer crossing the first threshold at $109,001 in 2024 MAGI faces roughly $1,148 in added Medicare costs.
- The two-year Medicare lookback means a large RMD or Roth conversion today can raise your premiums two years from now.
- The planning window is before RMDs begin. Roth conversions, measured early withdrawals, and diversification into low-correlation assets can all reduce exposure before forced distributions arrive.
Frequently asked questions
At what age do required minimum distributions start?
RMDs begin at age 73 for individuals born between 1951 and 1959, and at age 75 for those born in 1960 or later, under the SECURE 2.0 Act. Your first RMD can be delayed until April 1 of the year after you reach RMD age, though that stacks two distributions into one tax year.
Can RMDs make my Social Security benefits taxable?
Yes. RMDs count as ordinary income and raise your provisional income, the figure the IRS uses to determine benefit taxation. Once provisional income passes $34,000 for a single filer or $44,000 for joint filers, up to 85% of Social Security benefits can be taxed. These thresholds are not indexed for inflation.
How do RMDs affect Medicare premiums?
A large RMD raises your modified adjusted gross income, which can trigger IRMAA surcharges on Medicare Part B and Part D. IRMAA uses your income from two years prior, so a withdrawal today can raise premiums two years later. The brackets are hard cliffs: one dollar over a threshold triggers the full surcharge for that tier.
More Frequently asked questions
Do Roth IRAs have required minimum distributions?
No. Roth IRAs are not subject to RMDs during the original owner’s lifetime, and qualified Roth withdrawals are not taxed. Converting traditional balances to a Roth before RMDs begin is one way to reduce future taxable income, Social Security taxation, and Medicare surcharges. Beneficiaries who inherit Roth accounts are still subject to distribution rules.
Does a Gold IRA have required minimum distributions?
A traditional precious metals IRA follows the same RMD rules as any other traditional IRA, beginning at age 73 or 75 depending on birth year. A Roth precious metals IRA is not subject to RMDs during the owner’s lifetime. A specialist can help you decide which structure fits your tax situation.
What is the penalty for missing an RMD?
The penalty is up to 25% of the amount you failed to withdraw. It can be reduced to 10% if you correct the shortfall and file the required paperwork within two years. Setting up automatic distributions is a common way to avoid the issue entirely.
How can gold and silver fit into RMD planning?
Precious metals have historically held low correlation to stocks and bonds, which can help reduce the concentration in market assets that drives larger RMD balances over time. Holding a measured portion of retirement wealth in physical gold or silver adds diversification and a potential hedge against inflation, while broader timing strategies like Roth conversions address the tax side directly.
About Vault Metal
Vault Metal LLC is a full-service precious metals dealer and Precious Metals IRA provider based in El Segundo, California, with an A+ Better Business Bureau rating. Our specialists help retirement savers diversify and protect wealth through physical gold, silver, platinum, and palladium, including IRA and 401(k) rollovers handled from start to finish.
Have questions about how a Gold or Silver IRA fits your RMD timeline? A Vault Metal Precious Metals Specialist can walk through your situation with no obligation.
Call 877-330-3228
This article was created with the assistance of AI and has been reviewed for accuracy. It is for educational and informational purposes only and does not constitute tax, legal, or investment advice. Tax thresholds, Medicare premiums, and RMD rules cited reflect figures available at the time of writing and may change. Vault Metal is not a licensed tax advisor. Consult a qualified financial or tax professional regarding your individual situation before making decisions about RMDs, Roth conversions, Social Security, Medicare, or precious metals investments. All investments carry risk, including physical precious metals. Past performance does not guarantee future results.
