Turning 73 in 2026? Here’s What Your First RMD on a $500,000 IRA Actually Looks Like

If you turn 73 this year, the IRS finally comes calling on your traditional IRA. After decades of tax-deferred compounding, required minimum distributions (RMDs) begin. The scenario in the headline: $500,000 sitting in a traditional IRA on the last business day of 2025.

This scenario is common enough that retirement forums see the same question asked weekly: do I have to take it this year, or can I wait until next April? The short answer carries real tax consequences either way.

Here is the compact version of what matters:

• Turning 73 in 2026 (the SECURE 2.0 Act starting age for RMDs)
• Traditional IRA balance on Dec. 31, 2025: $500,000
• First distribution deadline: no later than April 1 of the year after you turn 73 (verify with IRS Publication 590-B)
• Every dollar withdrawn is taxed as ordinary income
• Roth IRAs held by the original owner have no lifetime RMD

The stakes are real: bracket creep, Medicare surcharges two years later, and penalties if you miss the deadline. The full playbook for defusing that first-year bill is in a free guide here.

Your Divisor Is the Only Number That Actually Matters

The IRS takes your December 31, 2025 balance and divides it by a life expectancy factor from the Uniform Lifetime Table in Publication 590-B. For a first-year filer at 73, that factor is 26.5. The calculation is straightforward: $500,000 divided by 26.5 equals a first RMD of $18,868, or about 3.77% of the account balance. That divisor shortens every year, so each successive RMD claims a slightly larger share of whatever remains.

On a $500,000 account, that $18,868 stacks directly on top of Social Security, pensions, dividends, and any other taxable income already in the picture.

Now for the tax reality. The 2026 standard deduction is $32,200 for married couples filing jointly and $16,100 for single filers. Taxpayers who are 73 also qualify for the additional $1,650-per-spouse age-65-plus add-on (for joint filers) or $2,050 (for single filers), plus a new $6,000 senior bonus deduction enacted in the One Big Beautiful Bill signed in July 2025. Even with those shields in place, if your other income already fills the 12% bracket, the RMD will push its top dollars into the 22% or 24% range.

Medicare compounds the situation. Your 2024 modified adjusted gross income (MAGI) determines your 2026 Medicare Part B and Part D premiums through a two-year lookback. Correspondingly, your 2026 MAGI will set your 2028 premiums. A single filer whose 2024 MAGI crossed $109,000 pays a total Part B premium of $284.10 per month in 2026, rising to $405.80 once MAGI exceeded $137,000. The Part D surcharge starts at $14.50 per month once MAGI passes $109,000 for singles or $218,000 for joint filers. An RMD that nudges you one dollar past a threshold means paying that surcharge every month for a full year, two years later. That is why the divisor conversation is really a bracket-and-IRMAA conversation.

Three Choices That Change the Outcome

1. Take the first RMD in the calendar year you turn 73: Deferring the initial distribution to April 1 of the next year sounds like a favor but is usually a trap. Delay it and you take two RMDs in 2027: the deferred 2026 amount plus the required 2027 amount. Two distributions in one tax year can double bracket damage and IRMAA exposure.
2. Use a qualified charitable distribution (QCD): If you give to charity, sending money directly from your IRA to a qualifying organization counts toward the RMD and is excluded from taxable income entirely. The 2026 QCD limit is $111,000 per person. For charitably inclined retirees, this is the single most tax-efficient RMD tactic available.
3. Withhold federal tax directly from the distribution: Your IRA custodian can withhold whatever percentage you specify. Withholding from an IRA distribution is treated as paid evenly throughout the year, so a December withholding can cover shortfalls on other income and head off an underpayment penalty.

Moves to Make Before the End of the Year

Pull the Dec. 31, 2025, statement now and confirm the balance. The RMD is calculated on that specific figure, and the arithmetic is simple: divide the balance by 26.5 to get the dollar amount the IRS expects you to withdraw.

Project 2026 taxable income with the RMD included and compare it against the IRMAA thresholds and 2026 bracket edges. If you land just over a threshold, look for ways to reduce other income: harvesting capital losses, deferring a Roth conversion, or timing a QCD to bring MAGI back under the line.

Do not miss the deadline. Under SECURE 2.0, the excise tax on a missed RMD is 25% of the shortfall, reduced from the old 50% rate. That rate can be cut further to 10% if you take the missed distribution and file IRS Form 5329 within the two-year correction window. Even at 10%, the penalty on an $18,868 shortfall runs nearly $1,900. A calendar reminder costs nothing.

One last reminder on the Roth IRA: If the $500,000 sat in a Roth IRA instead of a traditional IRA, and you were the original owner, none of this would apply during your lifetime. That single distinction is why many retirees prioritize Roth conversions in the low-income window between retirement and age 73.

Editor’s note: This article was updated to include the exact IRS Uniform Lifetime Table divisor of 26.5 for age 73 and the resulting $18,868 first RMD on a $500,000 balance, the 2026 QCD limit of $111,000, the specific 25% missed-RMD excise tax rate (reducible to 10% under SECURE 2.0’s two-year correction window), and the new $6,000 senior bonus deduction enacted in the One Big Beautiful Bill signed in July 2025.

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