Federal Income Tax on Retirement Distributions and Income

Federal income tax on retirement distributions generally works like this: money coming out of traditional 401(k)s, traditional IRAs, and most pensions is taxed as ordinary income at rates from 10% to 37% for 2026, a portion of your Social Security benefits becomes taxable once your combined income crosses certain thresholds, and qualified Roth withdrawals come out tax-free.¹ What you actually owe depends less on the account type than on how you time and combine the withdrawals.

Traditional 401(k) and IRA Withdrawals

Traditional 401(k) plans, 403(b) accounts, and traditional IRAs all follow the same deal. Contributions came out of pre-tax income, so every dollar you pull in retirement is ordinary income. The IRS does not separate original contributions from investment growth. If you put in $200,000 over a career and the account grew to $500,000, the full $500,000 is taxable as it comes out.²

Those withdrawals sit on top of your other income for the year, including pensions and Social Security. A large distribution can push you into a higher bracket. For 2026, a single filer crosses from 12% to 22% at $50,400 of taxable income, and from 22% to 24% at $105,700.¹ Joint filers hit those points at $100,800 and $211,400. Spreading withdrawals across multiple years often costs less in total tax than a single large draw.

One useful boundary: distributions from these accounts are not subject to the 3.8% net investment income tax that applies to dividends and capital gains. Withdrawals from 401(k)s, 403(b)s, and similar qualified plans are specifically excluded.

Pension and Annuity Payments

Monthly payments from an employer-funded pension are generally fully taxable at the federal level. Most traditional pensions are funded entirely by employer contributions and investment earnings, so you have no after-tax cost basis, and every check gets reported as ordinary income.

The math changes if you contributed your own after-tax dollars during your working years. Federal employees under FERS, for example, pay in with already-taxed income. A portion of each annuity payment represents a return of that after-tax money and is not taxed again. The IRS uses the Simplified Method (described in Publication 575) to split each payment into taxable and nontaxable pieces. Once you have recovered your full after-tax basis, every remaining payment is fully taxable.

Foreign pensions are generally taxed the same way as domestic pensions, even without a Form 1099. Some tax treaties assign taxing rights to the country of residence, but a “saving clause” in most treaties preserves the U.S. right to tax its own citizens and residents on worldwide income. If you paid foreign tax on the same income, a foreign tax credit may be available.³

When Social Security Benefits Become Taxable

Social Security benefits are tax-free for many lower-income retirees, but once your income rises, up to 85% of your benefits can be taxed. The IRS calls the trigger “combined income”: your adjusted gross income, plus tax-exempt interest, plus half of your Social Security benefits.⁴

For single filers, combined income between $25,000 and $34,000 makes up to 50% of benefits taxable; above $34,000, up to 85% is taxable. For joint filers, the 50% threshold starts at $32,000 and the 85% threshold at $44,000.⁴ These thresholds have never been adjusted for inflation since they were set in 1984 and 1993, so more retirees cross them every year. A modest IRA withdrawal can push combined income past a threshold and pull previously untaxed benefits into your return.

Roth IRA and Roth 401(k) Withdrawals

Roth accounts flip the tax structure. You contributed after-tax dollars, the money grows tax-free, and qualified withdrawals come out entirely tax-free, including earnings. To qualify, you must be at least 59½ and the Roth must have been open for five years. That five-year clock starts January 1 of the tax year of your first contribution to any Roth IRA.²

If you withdraw before meeting both requirements, only the earnings portion is taxable. Original contributions can always come out tax-free and penalty-free, since you already paid tax on that money. The IRS applies ordering rules to nonqualified withdrawals: contributions first, then conversion amounts, then earnings. That ordering keeps most Roth withdrawals out of tax even when the distribution is not technically “qualified.”

Roth IRAs carry one more advantage. The original owner never has to take required minimum distributions during their lifetime, so the account can keep growing tax-free as long as you live.

Accounts With Both Pre-Tax and After-Tax Money

Some traditional IRAs and 401(k)s hold a mix of pre-tax and after-tax dollars. You can’t cherry-pick the after-tax money on the way out. The IRS applies a pro-rata rule that treats each distribution as a proportional slice of taxable and nontaxable funds.

If 20% of your total traditional IRA balance came from nondeductible contributions, then 20% of any withdrawal is tax-free and 80% is taxable. The rule looks across all your traditional IRAs combined, not account by account. You track basis and calculate the nontaxable portion on Form 8606.⁵ Keep those records; the burden of proving your basis falls on you.

The 10% Early Withdrawal Penalty

Taking money out before age 59½ triggers a 10% additional tax on top of the regular income tax on the distribution. The penalty applies to the taxable portion.⁶ For someone in the 22% bracket, that turns an early withdrawal into an effective 32% federal cost before state tax.

Congress has carved out a long list of exceptions, and a detail that trips people up is that some apply only to IRAs and others only to employer plans:

Separation from service after age 55 (age 50 for public safety employees) lets you take penalty-free distributions from that employer’s plan. It does not apply to IRAs.⁶
Total and permanent disability qualifies for either type of account.⁷
Substantially equal periodic payments over your life expectancy avoid the penalty, but you must continue for at least five years or until 59½, whichever is longer.
Unreimbursed medical expenses above 7.5% of AGI are exempt from the penalty.
Up to $10,000 lifetime from an IRA for a first-time home purchase.
Qualified higher-education expenses paid from an IRA (still taxable, but not penalized).

SECURE 2.0 Additions

Starting in 2024, emergency personal expense distributions of up to $1,000 per year avoid the 10% penalty. You are limited to one per calendar year, and if you don’t repay within three years, you generally can’t take another until you do.⁸ Domestic abuse survivors can withdraw the lesser of $10,000 or 50% of their balance without penalty from IRAs and employer plans. Terminally ill individuals with a physician’s certification can take penalty-free distributions from employer plans.⁷ These distributions are still taxable income; the waiver only removes the extra 10%.

Required Minimum Distributions

Tax-deferred accounts can’t grow indefinitely. At a set age, you must begin required minimum distributions from traditional IRAs, 401(k)s, 403(b)s, and similar accounts:

Born 1951 through 1959: RMDs begin at age 73.⁹
Born 1960 or later: RMDs begin at age 75 under SECURE Act 2.0.

p>Your first RMD is due by April 1 of the year after you reach the required age. Every RMD after that is due by December 31. Delaying the first one into the following April means two RMDs in the same calendar year, which can push you into a higher bracket.

Each year’s RMD equals your prior-year December 31 balance divided by a life expectancy factor from the IRS Uniform Lifetime Table in Publication 590-B. A different table applies when your sole beneficiary is a spouse more than 10 years younger. Roth IRAs are exempt from lifetime RMDs for the original owner; Roth 401(k)s were subject to RMDs before 2024.⁹

Missing an RMD is expensive. The IRS imposes a 25% excise tax on the shortfall. Correct the miss within the correction window (generally by the end of the second tax year after the penalty was imposed) and the rate drops to 10%.¹⁰

Qualified Charitable Distributions

If you are 70½ or older and give to charity, a qualified charitable distribution is one of the cleanest breaks available. A QCD moves money directly from your IRA to a qualifying charity. It counts toward your RMD for the year and is excluded from taxable income.¹¹

For 2026, the maximum QCD is $111,000 per person, inflation-adjusted from the original $100,000 limit. Each spouse can make QCDs up to that amount from their own IRAs.¹² QCDs cannot come from SEP or SIMPLE IRAs, and the money must go directly from the IRA custodian to the charity. If the check runs through your hands first, it doesn’t qualify.

A QCD beats taking the distribution and claiming a charitable deduction because it keeps the money out of AGI entirely. A lower AGI can reduce the taxable share of your Social Security, help you avoid Medicare premium surcharges, and preserve other income-dependent tax benefits.

Roth Conversions

Converting money from a traditional IRA or 401(k) to a Roth IRA pays tax now to save more later. The converted amount is ordinary income in the year of conversion, and the 10% early withdrawal penalty does not apply to the conversion itself.¹³

The appeal is timing. In a low-income year early in retirement, before Social Security starts or before RMDs begin, you can convert at a relatively low rate. The converted money then grows and comes out tax-free, and it is not subject to future RMDs once inside the Roth. Over a long retirement, the savings compound.

The catch: the converted amount counts as income for every purpose that year. It raises AGI, which can make more of your Social Security taxable and push you into a higher Medicare premium bracket. Effective conversion strategies typically fill up the current tax bracket without spilling into the next.

Medicare Premium Surcharges (IRMAA)

Large distributions raise more than your income tax bill. Medicare uses your modified AGI from two years earlier to set current premiums, so 2026 premiums look at your 2024 return.¹⁴

Above certain income levels, you pay an Income-Related Monthly Adjustment Amount on top of standard Part B and Part D premiums. The 2026 standard Part B premium is $202.90 per month. For single filers (joint thresholds are doubled):¹⁵

$109,000 or below: no surcharge ($202.90).
$109,001 to $137,000: $81.20 surcharge ($284.10 total).
$137,001 to $171,000: $202.90 surcharge ($405.80 total).
$171,001 to $205,000: $324.60 surcharge ($527.50 total).
$205,001 to $499,999: $446.30 surcharge ($649.20 total).
$500,000 and above: $487.00 surcharge ($689.90 total).

Part D carries additional IRMAA surcharges at the same income thresholds, ranging from $14.50 to $91.00 per month.¹⁴ Because the look-back runs two years, a big Roth conversion or lump-sum withdrawal raises your premiums two years later. Timing distributions around those thresholds can save several thousand dollars a year.

Inherited Retirement Accounts

When you inherit a retirement account, the tax treatment turns on your relationship to the original owner and when they died. For deaths in 2020 or later, most non-spouse beneficiaries must empty the account by the end of the 10th year after the year of death.¹⁶ There is no set schedule within that window; you can take it all in year one or wait until year 10, so long as it is fully out by the deadline.

A narrower group of “eligible designated beneficiaries” can stretch distributions over their own life expectancy: surviving spouses, minor children of the account owner (until majority, when the 10-year clock starts), disabled or chronically ill individuals, and beneficiaries no more than 10 years younger than the deceased owner. Surviving spouses have the additional option of rolling the inherited account into their own IRA and treating it as their own, which delays RMDs until they reach their own required beginning age.¹⁶

Inherited Roth IRAs follow the same timeline rules but with a different tax outcome. If the original owner’s Roth met the five-year holding period, distributions to the beneficiary are tax-free. If not, earnings may be taxable, though original contributions still come out tax-free.²

Withholding, Estimated Tax, and 1099-R

Retirement income doesn’t come with automatic payroll withholding, so managing tax payments during the year is on you. There are two tools: withholding submitted to your plan administrator, and quarterly estimated tax payments to the IRS.

For recurring pension or annuity payments, submit Form W-4P to control federal withholding from each check.¹⁷ For one-time or irregular IRA and 401(k) withdrawals, use Form W-4R, which covers nonperiodic and eligible rollover distributions.¹⁸

If withholding doesn’t cover enough of the total, quarterly estimated payments fill the gap. The IRS imposes an underpayment penalty if you owe more than $1,000 at filing and haven’t paid at least 90% of the current-year tax or 100% of the prior-year tax (110% if prior-year AGI exceeded $150,000).¹⁹ Estimated payments are due in mid-April, mid-June, mid-September, and mid-January of the following year.

Payers issue Form 1099-R for any distribution of $10 or more from a retirement plan, pension, or IRA.²⁰ Box 1 shows the gross distribution, Box 2a the taxable amount as determined by the payer, Box 4 any federal tax already withheld, and Box 7 the distribution code that tells the IRS whether it was a normal withdrawal, an early distribution, or something else. Social Security recipients receive Form SSA-1099, with total benefits in Box 3 and voluntary withholding in Box 6.²¹

Extra Standard Deduction for Seniors, 2025 Through 2028

For tax years 2025 through 2028, taxpayers age 65 or older can claim an additional $6,000 standard deduction ($12,000 for a joint return when both spouses qualify). It is available whether you claim the standard deduction or itemize.²² The benefit phases out above modified AGI of $75,000 for single filers and $150,000 for joint filers. For retirees living mostly on Social Security and modest distributions, this deduction can trim, or eliminate, the federal bill.

1
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
2
Internal Revenue Service. Publication 590-B – Distributions from Individual Retirement Arrangements (IRAs)
3
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4
Internal Revenue Service. Publication 915 – Social Security and Equivalent Railroad Retirement Benefits
5
Internal Revenue Service. Instructions for Form 8606
6
Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts
7
Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
8
Internal Revenue Service. Notice 2024-55 – Certain Exceptions to the 10 Percent Additional Tax Under Code Section 72(t)
9
Internal Revenue Service. Retirement Topics – Required Minimum Distributions (RMDs)
10
Office of the Law Revision Counsel. 26 USC 4974 – Excise Tax on Certain Accumulations in Qualified Retirement Plans
11
Internal Revenue Service. Seniors Can Reduce Their Tax Burden by Donating to Charity Through Their IRA
12
Congress.gov. Qualified Charitable Distributions from Individual Retirement Accounts
13
eCFR. 26 CFR 1.408A-4 – Converting Amounts to Roth IRAs
14
Medicare.gov. 2026 Medicare Costs
15
Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
16
Internal Revenue Service. Retirement Topics – Beneficiary
17
Internal Revenue Service. About Form W-4P, Withholding Certificate for Periodic Pension or Annuity Payments
18
Internal Revenue Service. About Form W-4R, Withholding Certificate for Nonperiodic Payments and Eligible Rollover Distributions
19
Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
20
Internal Revenue Service. Instructions for Forms 1099-R and 5498
21
Social Security Administration. Get Your Social Security 1099 or 1042S Tax Form
22
Internal Revenue Service. 2026 Filing Season Updates and Resources for Seniors