The tax hit from RMDs often surprises retirees. Many people spent decades building tax-deferred accounts without fully accounting for the mandatory withdrawals that come with them. Understanding the ripple effects — and the strategies that reduce them — can save meaningful money over your retirement.
Four Ways RMDs Can Raise Your Tax Bill
Bracket Stacking
RMD income layers on top of your Social Security, pension, and investment income. Even a moderate RMD can push some of your income into the 22% or 24% bracket when it would otherwise be taxed at 12%.
Medicare IRMAA Surcharges
Higher income triggers additional Medicare Part B and Part D premiums via the Income-Related Monthly Adjustment Amount (IRMAA). A single large RMD can push you into a surcharge tier that costs $700–$4,000+ extra per year.
Social Security Taxation
RMD income raises your "combined income" for SS purposes. Once combined income exceeds $34,000 (single) or $44,000 (joint), up to 85% of SS benefits become taxable. RMDs are a primary driver of hitting that threshold.
Net Investment Income Tax
If your modified AGI exceeds $200,000 (single) or $250,000 (joint), a 3.8% surtax applies to net investment income. Large RMDs can push you over that threshold, triggering tax on dividends, capital gains, and interest.
2026 Medicare IRMAA Surcharges — What RMD Income Can Trigger
Full IRMAA guideIRMAA is based on MAGI from your tax return two years prior. A large RMD in 2026 can affect your 2028 Medicare premiums.
| 2024 MAGI (Individual) | 2024 MAGI (Joint) | 2026 Part B Premium | Monthly Surcharge |
|---|---|---|---|
| ≤ $106,000 | ≤ $212,000 | $185.00 | None |
| $106,001–$133,000 | $212,001–$266,000 | $259.00 | +$74.00/mo |
| $133,001–$167,000 | $266,001–$334,000 | $370.00 | +$185.00/mo |
| $167,001–$200,000 | $334,001–$400,000 | $481.00 | +$296.00/mo |
| $200,001–$500,000 | $400,001–$750,000 | $554.00 | +$369.00/mo |
| > $500,000 | > $750,000 | $592.90 | +$407.90/mo |
2026 premiums shown; based on 2024 MAGI (two-year lookback). Part D has separate IRMAA tiers.
One dollar over a threshold can cost thousands. IRMAA tiers are cliffs, not gradual phases. If your 2024 MAGI was $106,001, you pay the Tier 1 surcharge on your entire 2026 premium — not just on the $1 overage. Planning to stay just under a tier boundary is one of the most valuable moves in retirement income planning.
Strategies to Reduce the Tax Impact of RMDs
Qualified Charitable Distribution (QCD) — The Most Powerful RMD Tax Strategy
If you're 70½ or older, you can direct up to $105,000 directly from your IRA to a qualifying charity. The amount counts toward your RMD but is excluded from your adjusted gross income entirely — reducing your tax bill, potentially avoiding IRMAA, and keeping SS income from being taxed. Unlike a deduction, QCDs reduce AGI even if you take the standard deduction.
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Roth Conversions Before RMDs Begin
Converting traditional IRA funds to a Roth IRA before age 73 (or 75) reduces the future balance subject to RMDs. Conversions are taxable, but doing them in lower-income years — between retirement and RMD start — can be highly efficient.
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Take RMDs Early in the Year
Taking your RMD in January gives you 11 months to plan the rest of your income around it. It also ensures the distribution is invested in a taxable account longer if you don't need the cash. Some advisors prefer December for year-end flexibility.
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Use RMDs to Fund Deductible Expenses
Timing a large medical expense, charitable gift, or other deductible expense in the same year as a large RMD can reduce net taxable income. Bunching deductions into high-income RMD years is a planning technique worth discussing with a tax advisor.
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Appeal an IRMAA Determination Based on Life Event
If your income dropped significantly due to retirement, divorce, death of a spouse, or other qualifying life event, you can request that Medicare base your IRMAA on more recent income by filing Form SSA-44. This can reduce or eliminate surcharges in the year of the event.
The window between retirement and RMD age is the best tax planning opportunity most retirees never use. If you retire at 65 and RMDs don't start until 73, you have 8 years of potentially lower income to do Roth conversions, realize capital gains at 0%, and reduce the future RMD burden before the IRS forces it.
Minimize the Tax Hit on Your RMDs
QCDs, Roth conversions, IRMAA management, and withdrawal sequencing — a retirement tax specialist can model these strategies against your actual numbers at no charge.
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