Should You Withhold Taxes or Pay Quarterly in Retirement?

Retirement & Tax Planning Answers

Reviewed by Raman Singh, CFP® · Enrolled AgentUpdated September 12, 2026

Quick answer

For most retirees drawing from an IRA, 401(k), or pension, withholding is the simpler and more forgiving option, because the IRS treats withheld tax as if it were paid in equal installments across the entire year, regardless of when during the year it was actually withheld. Quarterly estimated payments don't get that treatment: a late or skipped first-quarter payment stays a first-quarter underpayment no matter what you pay later in the year. That difference lets someone who waits until November or December to take their annual RMD, and sets a high withholding percentage on it, retroactively cover a tax obligation that technically existed since January, something a quarterly payment schedule can't do. To avoid the underpayment penalty either way, you generally need your total withholding plus estimated payments for the year to equal the smaller of 90% of your current year's tax or 100% of last year's tax (110% if your prior-year adjusted gross income was over $150,000, or $75,000 if married filing separately).

The withholding advantage comes from how the IRS treats the timing of the payment, not from any lower total amount owed. Under the tax code's estimated tax rules, amounts withheld from wages, pensions, and retirement account distributions are deemed paid evenly throughout the year, even if the withholding actually happened in one lump sum in December. Quarterly estimated payments don't get that fiction. Each one is credited only for the quarter you actually paid it, so being late or light in an earlier quarter creates an underpayment for that quarter specifically, even if your total payments for the year end up correct.

The safe harbor numbers are the actual target, not a suggestion. You generally avoid the underpayment penalty if your withholding plus timely estimated payments equal at least 90% of what you'll actually owe this year, or 100% of what you owed last year (110% if your prior-year AGI exceeded $150,000, $75,000 if married filing separately), whichever is smaller. First-year retirees often default to the 100%/110% prior-year test because it's simple, but that test is based on a return that likely still included working income, so it can overstate what you actually need to pay now that your income has dropped. Running an actual projection against the 90%-of-current-year test is usually the better target once income has genuinely declined.

Mechanically, this means submitting a withholding election, typically Form W-4R for a one-time or periodic IRA or retirement plan distribution, Form W-4P for pension and annuity payments, or Form W-4V if you want tax withheld from Social Security, rather than assuming a default percentage is being applied correctly. You can elect withholding well above the default, including 100% of a distribution, which is exactly the lever that makes the year-end move above work.

This is especially useful for retirees who don't need their RMD for living expenses and are just going to reinvest it in a taxable account anyway. Taking the full RMD late in the year with a large withholding election means the withheld amount can cover not just tax on the RMD itself, but also tax owed on Social Security, pension income, interest, dividends, and capital gains realized earlier in the year, cleaning up the whole year's tax picture in a single transaction instead of four separate quarterly estimates you have to remember to send.

None of this changes how much tax you ultimately owe for the year. It only changes the penalty exposure around the timing of when you paid it. The underpayment penalty itself is calculated as an interest charge on each shortfall period, at a rate the IRS sets quarterly, tied to the federal short-term rate. That rate moves, so check the current quarterly rate on IRS.gov rather than assuming a fixed number, but the mechanism (interest on late-paid tax, not a flat fine) stays the same regardless of the rate in effect.

Ed Slott, a nationally recognized IRA and tax expert, has long argued that in the gap years between retirement and the start of RMDs at 73, when many retirees sit in an unusually low tax bracket, using that bracket space for Roth conversions matters more than avoiding an IRMAA surcharge. His reasoning: leaving a large traditional IRA balance untouched during the low-bracket years doesn't avoid tax, it defers the same balance into mandatory RMDs at 73 that are calculated on a larger account and taxed at whatever bracket you're in by then, often permanently elevating Medicare IRMAA premiums for the rest of retirement. A one-time IRMAA bump from converting today, in his view, is frequently the cheaper outcome than a permanently higher RMD-driven IRMAA tier later.

If you take RMDs or other IRA distributions and don't need the cash immediately, consider setting a high withholding percentage on a late-year distribution rather than making quarterly estimated payments all year. It's one transaction to track instead of four.

Run an actual projection of this year's tax liability rather than defaulting to the prior-year safe harbor, especially in your first year or two of retirement, when last year's return still reflects working income that no longer applies.

• Assuming quarterly estimated payments and equivalent withholding are interchangeable. They're not: only withholding gets the deemed-paid-evenly treatment.
• Defaulting to the 100%/110%-of-last-year safe harbor in the first year or two of retirement without checking whether the 90%-of-current-year test would actually require less, since last year's return likely still reflected a working income.
• Forgetting to actually submit a withholding election (W-4R, W-4P, or W-4V) and assuming a custodian is withholding an appropriate amount by default.
• Treating IRMAA avoidance as the top priority in the low-bracket gap years before RMDs begin, when leaving a large IRA balance untouched can lock in a bigger, permanent IRMAA problem once RMDs start.