For most retirees, yes — you should have federal income tax withheld from your RMD. The reason is a rule most people never hear about: taxes withheld from a retirement distribution are treated by the IRS as if they were paid evenly across all four quarterly estimated tax deadlines, even if the whole distribution lands in December.1Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax That single quirk turns withholding into a flexible safety net against underpayment penalties that quarterly estimated payments cannot match. There are situations where estimated payments still make sense, but the default answer for retirees taking annual RMDs is to withhold.
Why Withholding Usually Wins
Every dollar of a required minimum distribution is taxed as ordinary income in the year you receive it, and if you don’t pay enough tax throughout the year, the IRS charges an underpayment penalty. You have two ways to pay: withholding from the distribution itself, or quarterly estimated tax payments.
Estimated payments count only on the date the IRS receives them. If you pay $8,000 in November, that money covers the fourth quarter — it does nothing for shortfalls in April, June, or September. Each quarter is evaluated independently, and a late catch-up doesn’t erase earlier underpayments.
Withholding works differently. Under 26 U.S.C. § 6654(g), federal income tax withheld from a distribution is treated as if it were paid in equal installments on each quarterly due date.1Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax Take your entire RMD in November with $8,000 withheld, and the IRS credits $2,000 to each of the four quarterly dates, all the way back to April. Withholding retroactively cures earlier quarters where you were short.
Withholding is also simpler to manage. One form with your custodian, one percentage, and the tax is handled before the money reaches your bank account. No deadlines to track, no checks to mail, no logins to remember. For retirees whose main tax liability comes from retirement distributions and Social Security, withholding can eliminate estimated payments entirely.
When Estimated Payments Still Make Sense
Some retirees prefer to keep the full RMD invested a bit longer and pay the tax separately. If your income is steady and predictable, and you’re disciplined about deadlines, estimated payments work. You use Form 1040-ES to calculate and submit each payment.2Internal Revenue Service. About Form 1040-ES, Estimated Tax for Individuals The 2026 quarterly due dates are April 15, June 15, September 15, and January 15, 2027.3Internal Revenue Service. 2026 Form 1040-ES
The trade-off is rigidity. If your income turns out lumpier than expected — a mid-year capital gain, a surprise consulting check, a larger RMD than you planned — you can’t easily rescue an earlier quarter with a later payment. Retirees with variable income usually find the flexibility of withholding is worth more than the few extra weeks of investment growth.
How to Set Up Withholding on Your RMD
Which form you file with your custodian depends on how you take the distribution. If your payments come on a regular schedule over more than one year — monthly or quarterly installments, for instance — those are periodic payments and you use Form W-4P.4Internal Revenue Service. About Form W-4P, Withholding Certificate for Periodic Pension or Annuity Payments If you take your RMD as a single annual withdrawal or any other one-time distribution, that’s a nonperiodic payment and you use Form W-4R.5Internal Revenue Service. Form W-4R – Withholding Certificate for Nonperiodic Payments and Eligible Rollover Distributions Most retirees taking an annual IRA distribution use the W-4R.
The default federal withholding rate for a nonperiodic distribution from an IRA or retirement plan is 10%.6Internal Revenue Service. Pensions and Annuity Withholding You can adjust that to anything from 0% to 100%. For many retirees, 10% is too low. If your combined income puts you in the 22% or 24% bracket, withholding 10% will leave a balance due at filing time.
A common misconception: distributions from a 401(k) do not carry an automatic 20% mandatory withholding. That rule applies only to eligible rollover distributions, and RMDs cannot be rolled over.7Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions8Office of the Law Revision Counsel. 26 USC 3405 – Special Rules for Pensions, Annuities, and Certain Other Deferred Income Your 401(k) RMD, like an IRA RMD, defaults to 10% unless you elect otherwise.
State income tax is a separate election. Many states have their own default rates and forms for retirement distributions. If you live in a state with income tax, ask your custodian about the state option so April doesn’t bring a surprise bill.
Picking the Right Withholding Percentage
Start with your prior year’s tax return. Divide total tax by total income to find your effective rate. That’s a reasonable floor for withholding. If you expect higher income this year — a larger RMD, more investment income, part-time work — bump it up.
Some rough anchors that hold up in practice:
- If your RMD is your main income source and you’re in the 12% bracket, withholding 12% to 15% usually covers it.
- If Social Security, a pension, or investment income puts your combined income in the 22% or 24% bracket, withhold at least that rate from the RMD itself.
- If your AGI exceeds $150,000, your safe harbor target rises (see below), so withhold more aggressively.
For 2026, federal brackets range from 10% on the first $12,400 of taxable income for single filers up to 37% on income above $640,600.9Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 A large RMD can push part of your income into the next bracket, so check where the thresholds fall before choosing a rate.
Retirees on monthly periodic distributions can adjust the W-4P during the year if circumstances change. Those taking a single annual withdrawal have one shot on the W-4R, so err on the side of withholding more rather than less. An overshoot comes back as a refund. An underpayment penalty doesn’t.
The Safe Harbor Targets to Aim For
You avoid an underpayment penalty entirely by hitting any one of three targets:
- You owe less than $1,000 in tax after subtracting withholding and credits.
- You pay at least 90% of the current year’s total tax through withholding and estimated payments combined.
- You pay at least 100% of the prior year’s total tax — 110% if your prior-year AGI exceeded $150,000 ($75,000 if married filing separately).10Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
Most retirees use the prior-year safe harbor because it’s a known number. Look at last year’s return, calculate the target, and set your withholding to hit it. No forecasting required.
The December Catch-Up Move
The even-payment rule for withholding is at its most useful late in the year. Say it’s November and you realize you’re short on tax. Estimated payments can’t help with earlier quarters — the April, June, and September deadlines have passed. But if you take your RMD in December and set a large withholding percentage, that amount gets credited evenly across all four quarters.1Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax A December RMD with enough withholding can retroactively cure underpayments from earlier in the year. It’s the single most powerful reason to keep withholding in your toolkit, and it’s why accountants recommend the technique to clients facing a surprise income event.
One caveat: the withholding option only helps if you still have an RMD to take. If you already took the distribution earlier in the year without enough withheld, you can’t retroactively add more. Some retirees deliberately hold their RMD until December for this reason — it keeps the withholding lever available all year.
What Happens if You Miss the RMD Entirely
Withholding decisions matter only if you actually take the distribution on time. If you fail to withdraw your full RMD by the deadline, the IRS imposes an excise tax of 25% on the shortfall.11Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs If you correct the mistake within two years, the penalty drops to 10%.
The IRS can waive the penalty entirely when the shortfall was due to reasonable error. To request a waiver, withdraw the missed amount as soon as you realize the mistake, then file Form 5329 with a letter explaining what happened. Enter “RC” and the shortfall amount on the dotted line next to line 54, and reduce the reported penalty accordingly.12Internal Revenue Service. Instructions for Form 5329 Custodian errors, serious illness, and bad advice from a financial institution are common reasonable-cause situations. Act fast and document everything.