Most retirement income is taxed, but the rate depends on the source

Retirement income is usually subject to federal income tax. The amount you owe depends on where the money comes from — Social Security, a 401(k), an IRA, pension, or investment accounts all have different tax rules. Some retirees pay no federal tax at all because their total income falls below the threshold; others pay tax on 85% of their Social Security benefits while their 401(k) withdrawals are taxed as ordinary income.

The key is understanding which accounts are pre-tax (you deduct contributions now, pay tax on withdrawals later) and which are after-tax (you already paid tax on the money going in). A traditional IRA or 401(k) is pre-tax. A Roth IRA is after-tax — you pay no federal tax on withdrawals in retirement. A regular investment account is a mix: you pay tax on dividends and capital gains as you earn them, not when you withdraw.

Key Takeaways

  • Traditional 401(k)s, traditional IRAs, and pensions are taxed as ordinary income when you withdraw them in retirement.
  • Roth IRAs and Roth 401(k)s are not taxed on withdrawal because you already paid tax when you contributed.
  • Social Security benefits may be taxed if your total income exceeds a certain threshold, which varies by filing status.
  • Investment accounts held outside retirement plans are taxed on dividends and capital gains each year, not just when you sell.
  • Your tax bracket in retirement depends on your total income from all sources combined, not on any single account.

How traditional retirement accounts are taxed

A traditional 401(k) or traditional IRA lets you deduct contributions from your income in the year you make them, lowering your tax bill that year. When you withdraw money in retirement, the full amount is taxed as ordinary income at your current tax rate. If you withdraw $50,000 from a traditional IRA and you are in the 22% tax bracket, you owe $11,000 in federal tax on that withdrawal.

A pension works the same way. Your employer contributed to it with pre-tax dollars, so your monthly or annual pension payment is taxed as ordinary income. The IRS requires you to start taking withdrawals from traditional IRAs and 401(k)s at age 73 (as of 2023), whether you need the money or not. These are called required minimum distributions, or RMDs, and they are taxed in full.

The tax bracket you fall into depends on your total income from all sources — not just the retirement account. If you have Social Security, a pension, and a 401(k) withdrawal all in the same year, the IRS adds them together to determine your bracket. This matters because moving into a higher bracket can increase the tax on all your income, not just the new withdrawal.

Roth accounts and tax-free withdrawals

A Roth IRA or Roth 401(k) is the opposite of a traditional account. You contribute after-tax dollars — meaning you do not get a deduction when you contribute — but withdrawals in retirement are tax-free. If you put $7,000 into a Roth IRA, pay tax on that $7,000 as part of your regular income, and then withdraw $15,000 years later after it has grown, you owe no federal tax on the $15,000.

There is a catch: you must have held the Roth account for at least five years and be age 59½ to withdraw earnings tax-free. If you withdraw before then, the earnings portion is taxed and may face a 10% penalty, though the contributions themselves can always come out tax-free. You also do not have to take required minimum distributions from a Roth IRA during your lifetime, which makes them useful for people who do not need the money right away.

Social Security taxation rules

Social Security benefits may or may not be taxed, depending on your combined income. Combined income is your adjusted gross income plus non-taxable interest plus half of your Social Security benefits. If you are single and your combined income is below $25,000, your benefits are not taxed. Between $25,000 and $34,000, up to 50% of your benefits may be taxed. Above $34,000, up to 85% may be taxed.

If you are married filing jointly, the thresholds are $32,000 and $44,000. These thresholds have not changed since 1984, so more retirees are affected now than in the past. Even if you have no other income, if you have a large IRA withdrawal or pension payment in a single year, it can push your combined income high enough to trigger taxation of your Social Security benefits.

Investment accounts and capital gains tax

Money in a regular investment account — stocks, bonds, mutual funds held outside a retirement plan — is taxed differently. You pay tax on dividends and interest each year, even if you do not sell anything. When you do sell an investment at a profit, the gain is taxed as either a short-term capital gain (if you held it less than a year) or a long-term capital gain (if you held it a year or more).

Long-term capital gains are taxed at lower rates than ordinary income: 0%, 15%, or 20% depending on your income level, compared to ordinary income rates that go up to 37%. This is why some retirees keep money in taxable investment accounts rather than moving everything into retirement plans — the tax treatment can be more favorable. However, you pay tax on the gains each year, not just when you withdraw.

State and local taxes on retirement income

Federal tax is only part of the picture. Many states also tax retirement income, though the rules vary widely. Some states do not tax income at all. Others exempt Social Security but tax 401(k) and IRA withdrawals. A few exempt all retirement income. A handful tax everything the same way the federal government does.

If you are planning to move in retirement, state tax treatment can make a real difference. A $50,000 withdrawal might be taxed at 22% federally but also at 5% or more by your state, depending on where you live. Some states have residency requirements — you have to live there for a certain number of months per year to get the tax break — so check the rules before you move.

Estimated tax payments and withholding

If you owe federal tax on your retirement income, you can either have tax withheld from your withdrawals or make quarterly estimated tax payments. Most people choose withholding because it is simpler. When you take a distribution from a 401(k) or IRA, you can tell the plan administrator how much to withhold, and they send it to the IRS for you.

If you do not withhold enough, you may owe a penalty when you file your return. If you withhold too much, you get a refund. Some retirees intentionally over-withhold to avoid the hassle of quarterly payments. The key is to plan ahead — if you know you will have a large withdrawal in a particular year, you can increase your withholding that year to avoid owing money at tax time.

Frequently Asked Questions

Do I have to pay federal tax on all my retirement income?

Not necessarily. If your total income is below the standard deduction for your filing status, you owe no federal tax. The standard deduction for 2024 is $14,600 for single filers and $29,200 for married couples filing jointly. However, if you have a mix of income sources, you may owe tax even if each individual amount seems small.

Can I avoid taxes by taking withdrawals slowly?

Spreading withdrawals over time can help, but it depends on your situation. If you have a large lump sum in a traditional account, taking it all at once may push you into a higher tax bracket for that year. Taking smaller amounts over several years keeps you in a lower bracket. However, required minimum distributions at age 73 may force larger withdrawals than you would choose.

What is the difference between ordinary income tax and capital gains tax?

Ordinary income tax applies to wages, pensions, 401(k) withdrawals, and IRA withdrawals. Capital gains tax applies to profits from selling investments. Long-term capital gains (held over a year) are taxed at 0%, 15%, or 20%. Ordinary income is taxed at rates from 10% to 37%. This is why holding investments longer can reduce your tax burden.

If I convert a traditional IRA to a Roth, do I have to pay tax?

Yes. A Roth conversion means moving money from a traditional IRA to a Roth IRA. The amount you convert is treated as income in that year, and you owe tax on it at your ordinary income rate. This can be useful if you expect to be in a higher tax bracket later, but it requires careful planning to avoid pushing yourself into an unexpectedly high bracket.

Are there any retirement income sources that are never taxed?

Roth IRA and Roth 401(k) withdrawals are never taxed federally if you meet the age and holding-period requirements. Some states do not tax any retirement income. A few people receive tax-free military or government pensions under specific circumstances, but this is rare and depends on when you served or worked.