The paycheck stops, but the withholding questions do not. Retirement income arrives from several places at once, and each source follows its own withholding rulebook. A pension uses one form. An IRA withdrawal uses a different one. Social Security uses a third, and withholds nothing at all unless you ask.
Nobody coordinates these. There is no payroll department watching the total. The pension administrator does not know what you pulled from the IRA in March, and the Social Security Administration does not know either exists. Every payer withholds correctly according to its own narrow view, and the household total can still land far from the actual tax bill.
The good news is that retirees have more control over this than employees do. You choose the timing of most withdrawals and the rate on most of them. The catch is that the defaults are not designed for your situation, and leaving them alone is a decision whether it feels like one or not.
Quick answer
Most retirement income is taxable, and each source has a separate withholding default that has no relationship to your total tax bill. Pensions and annuities use Form W-4P. IRA and plan withdrawals use Form W-4R. Social Security uses Form W-4V and withholds nothing unless you file it.
The usual outcome is a surprise in one direction or the other, and it can be sizeable, because Social Security is the piece most likely to be taxable and least likely to have anything withheld from it.
Four income streams, four rulebooks
| Income source | Form | What happens if you file nothing |
|---|---|---|
| Pension or annuity, paid on a schedule | W-4P | Withheld as a single filer with no adjustments |
| IRA withdrawal or other nonperiodic payment | W-4R | 10% of the taxable amount |
| Eligible rollover distribution paid to you from an employer plan | W-4R | 20%, mandatory, and you cannot elect less |
| Social Security benefits | W-4V | Nothing is withheld |
Look at that last row for a moment. Social Security is the only major income source in American life where withholding is entirely opt-in, and it is also the source most retirees assume is not taxable at all.
Pensions and annuities
Form W-4P covers periodic payments, meaning a stream paid at regular intervals over more than one year. It looks a lot like the W-4 you filled out at work, with filing status, dependents, other income, and deductions.
The default matters here. Since the form was redesigned, a payee who submits nothing is withheld as a single filer with no adjustments. For a married retiree with a modest pension, that default usually withholds more than necessary on that payment considered alone. For a retiree with substantial income from elsewhere, it can still be far too little across the household.
You can also choose no withholding at all on a pension. That is a legitimate option, and a reasonable one if you are covering the tax some other way, but it should be a choice rather than something that happened.
IRA and 401(k) withdrawals
Form W-4R covers nonperiodic payments and eligible rollover distributions, and it works differently. Instead of filing status and dependents, you pick a percentage. You can choose anything from 0% to 100%, and IRA distributions payable on demand count as nonperiodic.
Two defaults apply. Ordinary nonperiodic payments are withheld at 10% of the taxable amount unless you say otherwise. Eligible rollover distributions from an employer plan paid to you are withheld at a mandatory 20%, and you cannot elect less, though you can elect more.
That 20% catches people who intend to move money between accounts themselves. If you take a $100,000 distribution from a 401(k) with the intention of rolling it into an IRA within 60 days, $20,000 is withheld, and you must deposit the full $100,000 to complete the rollover, replacing the withheld amount from your own pocket. Any shortfall is treated as a taxable distribution. Requesting a direct trustee-to-trustee transfer instead avoids the whole problem, since no withholding applies to a direct rollover.
Social Security
Nothing is withheld from benefits unless you submit Form W-4V. When you do, the choices are restricted to four flat rates: 7%, 10%, 12%, or 22%. There is no custom percentage and no dollar amount option.
Because the menu is coarse, many retirees use Social Security withholding as a rough instrument and fine-tune elsewhere, usually through the rate on an IRA withdrawal.
How much of Social Security is actually taxable
This is the part that surprises people, and it turns on a figure called provisional or combined income: your adjusted gross income, plus tax-exempt interest, plus half your Social Security benefits.
| Filing status | Up to 50% taxable above | Up to 85% taxable above |
|---|---|---|
| Single, head of household, qualifying surviving spouse | $25,000 | $34,000 |
| Married filing jointly | $32,000 | $44,000 |
| Married filing separately, if you lived with your spouse at any point in the year | Up to 85% taxable on any positive provisional income | |
Two things about this table deserve attention. The percentages are caps on how much of the benefit enters taxable income, not tax rates. Once included, the taxable portion is taxed at your ordinary rate like any other income.
More importantly, these thresholds are written into the statute as fixed dollar amounts with no inflation indexing. They have not moved since the 1980s. Every cost-of-living increase to benefits, and every year of growth in other income, pushes more households across lines that never move. A threshold that once applied to comfortable retirees now reaches ordinary ones, and it will keep doing so.
There is a compounding effect worth naming, sometimes called the tax torpedo. Because an extra dollar of IRA withdrawal raises provisional income, it can also drag additional Social Security into taxable income alongside it. In the phase-in ranges, one additional dollar of withdrawal can add well over a dollar to taxable income, which is why large one-off withdrawals and Roth conversions deserve modelling rather than guessing.
About the senior deduction
You have likely seen claims that Social Security is now tax free. That is an overstatement of something real.
What exists is a deduction of up to $6,000 per qualifying individual aged 65 or older, available for tax years 2025 through 2028, phasing out above $75,000 of income for single filers and $150,000 for joint filers. It stacks on top of the regular standard deduction and the existing additional amount for being 65 or older, which for 2026 is $1,650 per qualifying married person or $2,050 for unmarried filers.
For lower and middle income retirees, that combination can reduce taxable income enough that little or no tax ends up being paid on benefits. That is a genuine benefit. What it does not do is change the provisional income calculation or exempt Social Security from taxation. Your benefits still enter the calculation the same way. The deduction simply reduces what is taxed afterward. Retirees above the phaseout range see little or none of it.
A worked example
A married couple, both 67, filing jointly for 2026. A pension pays $30,000, Social Security pays $40,000, and they take $50,000 from a traditional IRA. Nobody filed W-4P, W-4R, or W-4V, so every default applies.
| Step | Amount |
|---|---|
| Provisional income ($30,000 + $50,000 + half of $40,000) | $100,000 |
| Social Security that becomes taxable, capped at 85% | $34,000 |
| Adjusted gross income | $114,000 |
| Deductions: standard $32,200, age 65 additions $3,300, senior deduction $12,000 | $47,500 |
| Taxable income | $66,500 |
| Federal tax | About $7,484 |
Now the withholding side, with every default left in place.
| Source | Default applied | Withheld |
|---|---|---|
| Pension, $30,000 | Single filer, no adjustments | About $1,420 |
| IRA withdrawal, $50,000 | 10% nonperiodic default | $5,000 |
| Social Security, $40,000 | No W-4V on file | $0 |
| Total withheld | About $6,420 | |
| Balance due | About $1,064 |
The shortfall is moderate here, and that is the honest result rather than a dramatic one. The point is what produced it: $34,000 of Social Security entered taxable income with nothing withheld against it, while a flat 10% covered the IRA withdrawal and the pension was withheld as though it were a single person’s only income. Three reasonable-looking defaults, no coordination between them, and the total is simply whatever it happens to be.
Change any input and the result swings. A larger IRA withdrawal deepens the gap. A W-4V election at 10% on benefits would produce a refund instead. These figures exclude state tax and assume no other income, so treat them as an illustration of the mechanism.
State rules are a separate question entirely
Most states do not tax Social Security benefits at all, and the number that do has been shrinking, down to fewer than ten. Several of those tax benefits only above income thresholds or offer credits that offset the tax for many retirees.
Pension and IRA income is a different matter, and state treatment varies widely. Some states exempt retirement income up to a dollar limit, some exempt public pensions but not private ones, some tax it in full, and some have no income tax at all. The state income tax rates by state reference is a starting point, and No Income Tax States is worth reading before treating a move as an obvious win, since property and sales taxes often pick up the slack.
State withholding on retirement distributions is also handled separately from federal, and some states have their own election forms.
Required minimum distributions change the arithmetic
Once required minimum distributions begin, a large piece of your taxable income stops being optional. Under current rules the starting age is 73 for those born from 1951 through 1959, rising to 75 for those born in 1960 or later.
The first year contains a trap. You may delay the first RMD until April 1 of the following year, but the second is still due by December 31 of that same year, which stacks two distributions into one tax year. That can push provisional income up, pull more Social Security into taxable income, and in some cases affect Medicare premium surcharges, which are based on income from two years earlier. Taking the first RMD in the year you turn 73 instead spreads it across two tax years.
Missing an RMD carries an excise tax of 25% of the shortfall, reduced to 10% if corrected promptly. Retirees who give to charity should also look at qualified charitable distributions, available from age 70½, which can satisfy an RMD without the amount appearing in income at all.
Withhold, or pay quarterly
Both routes are valid, and retirees can mix them. Quarterly estimated payments are covered in Estimated Taxes 2026, including the safe harbor rules that let you avoid penalties by paying a set percentage of last year’s tax.
There is one advantage to withholding that is genuinely useful and not widely known. Amounts withheld are generally treated as having been paid evenly across the year, no matter when they were actually withheld. That means a retiree who reaches November and realizes they are short can take a distribution with a high withholding percentage and cure the whole year’s underpayment, which a fourth-quarter estimated payment does not do as cleanly. This is a real planning tool and one of the better reasons for a retiree to prefer withholding over quarterly payments.
Whether you should aim to land near zero or deliberately over-withhold is a separate question, and Big Refund or Bigger Paycheck covers the trade-off.
Checklist
- List every income source for the year, including pensions, annuities, Social Security, IRA and plan withdrawals, part-time work, interest, dividends, and capital gains.
- Find out what each payer is currently withholding. Check the most recent statement from each rather than assuming.
- Calculate provisional income and work out how much of your Social Security is likely to be taxable.
- Estimate the full-year federal tax, remembering the age 65 additions and the senior deduction if you qualify.
- Compare the estimate against total expected withholding across all sources.
- Adjust with whichever lever is easiest, usually the percentage on an IRA withdrawal via Form W-4R, or a W-4V election on benefits.
- Check your state’s treatment of Social Security and pension income, and file any state election form.
- If RMDs have started or start soon, plan the timing before December rather than during it.
- Revisit whenever a source changes, a spouse’s situation changes, or you take an unusually large distribution.
Retirement is also a life event in the tax sense, and the wider list of updates that follow any household change sits in New Baby, Marriage, Divorce, or New Job: The Tax Updates People Forget. If you are still working and deciding where retirement savings should go, IRA vs 401(k) and Traditional vs Roth 401(k) both bear on how much of this you will face later, since Roth balances do not carry the same provisional income consequences.
Sources and notes
This article was reviewed against IRS guidance on pensions and annuity withholding, the IRS Form W-4P and Form W-4R and their instructions, IRS required minimum distribution guidance, and Revenue Procedure 2025-32 for 2026 deduction amounts and brackets. Social Security taxation thresholds are set by 26 U.S.C. 86 and explained in IRS Publication 915. The senior deduction reflects provisions of the One Big Beautiful Bill Act applicable for 2025 through 2028.
Figures in the example are simplified illustrations that exclude state and local tax and assume no other income. Retirement tax situations vary enormously with account types, ages, state of residence, Medicare premiums, and the timing of distributions. This article is for general educational purposes only and should not be treated as personal tax, legal, or financial advice. Distribution decisions in particular are difficult to reverse, and a conversation with a qualified professional before a large withdrawal or conversion is usually money well spent.
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