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Inherited IRA and 401(k): Rules, Taxes, and the 10-Year Rule

Retirement accounts are often the largest assets in an estate. How you handle an inherited IRA, 401(k), or pension can mean the difference between thousands of dollars in taxes or smart, tax-efficient distributions. The rules changed significantly in 2020, and many people are still unaware of the new requirements.

Types of Retirement Accounts

Before diving into the rules, it helps to understand the different types of accounts you might encounter. Each has slightly different rules for beneficiaries.

Traditional IRA

Contributions were made with pre-tax dollars. All distributions are taxed as ordinary income. This is the most common type of inherited retirement account.

Roth IRA

Contributions were made with after-tax dollars. Qualified distributions are completely tax-free, including earnings, as long as the 5-year holding period is met.

401(k) / 403(b)

Employer-sponsored plans. Traditional 401(k) distributions are taxable. Roth 401(k) distributions follow Roth rules. The plan administrator controls the distribution process.

Pension

Defined benefit plans that pay a fixed monthly amount. Survivor benefits depend on the payment option the employee chose at retirement, such as joint-and-survivor or single life annuity.

The SECURE Act: What Changed in 2020

The Setting Every Community Up for Retirement Enhancement (SECURE) Act, signed into law in December 2019 and effective January 1, 2020, fundamentally changed how inherited retirement accounts are distributed. If the account holder died on or after January 1, 2020, the new rules apply.

Pre-2020 Rules (Old Law)

  • Non-spouse beneficiaries could "stretch" distributions over their own life expectancy
  • Annual RMDs were required based on the beneficiary's age
  • A 30-year-old inheriting an IRA could spread distributions over 50+ years
  • This allowed significant tax-deferred growth over decades

Post-2020 Rules (SECURE Act)

  • Most non-spouse beneficiaries must empty the account within 10 years
  • No annual RMDs during the 10 years (for pre-RBD deaths)
  • Account must be fully emptied by Dec 31 of the 10th year
  • Five categories of "eligible designated beneficiaries" are exempt

Important Note on Annual RMDs

IRS guidance issued in 2022 and 2024 clarified that if the original account holder died on or after their "required beginning date" (typically April 1 of the year after turning 73), annual RMDs are required during the 10-year period, in addition to the requirement to empty the account by year 10. The IRS waived penalties for missed RMDs in 2021-2024, but this relief is expected to end. If you are in this situation, consult a tax professional.

Surviving Spouse: Your Options

Surviving spouses have the most flexible options of any beneficiary. You are not subject to the 10-year rule and have several choices for handling inherited retirement accounts.

Option 1: Spousal Rollover (Most Common)

Roll the inherited account into your own IRA. The account is then treated as if it has always been yours. RMDs are based on your own age, using the standard IRS life expectancy tables.

Best for: Spouses who do not need the money immediately and want to continue tax-deferred (or tax-free, for Roth) growth. Particularly beneficial for younger spouses, since RMDs do not begin until age 73.

Option 2: Inherited IRA

Keep the account as an "inherited IRA" in the deceased spouse's name. You can take distributions based on your life expectancy, and there is no 10% early withdrawal penalty regardless of your age.

Best for: Spouses under age 59 1/2 who need access to the funds now. A spousal rollover would subject withdrawals to the 10% early withdrawal penalty, but keeping it as an inherited IRA avoids this.

Option 3: Lump Sum Distribution

Withdraw the entire balance at once. For traditional accounts, the entire amount is taxable as ordinary income in the year of withdrawal.

Best for: Very rarely the best option. Taking a large lump sum can push you into a much higher tax bracket. Consult a tax professional before choosing this route.

Non-Spouse Beneficiary: The 10-Year Rule

If you are a child, sibling, friend, or other non-spouse beneficiary who inherited a retirement account from someone who died on or after January 1, 2020, you generally must withdraw all funds within 10 years. You cannot roll the account into your own IRA.

Exceptions: Eligible Designated Beneficiaries

These five categories of beneficiaries are exempt from the 10-year rule and can still stretch distributions over their life expectancy:

  • 1.
    Surviving spouse

    As discussed above, with the most flexible options of any beneficiary.

  • 2.
    Minor children of the deceased

    Only the deceased's own children (not grandchildren). Once the child reaches the age of majority (18 in most states, 21 in some), the 10-year clock begins. Under SECURE Act 2.0, the age of majority for this rule is 21.

  • 3.
    Disabled individuals

    As defined under IRC Section 72(m)(7): unable to engage in substantial gainful activity due to a physical or mental condition that is expected to be of long or indefinite duration.

  • 4.
    Chronically ill individuals

    Unable to perform at least 2 of 6 activities of daily living, or requiring substantial supervision due to cognitive impairment, as certified by a licensed health care practitioner.

  • 5.
    Individuals not more than 10 years younger than the deceased

    For example, a sibling or close-in-age friend. They can use the life expectancy method for distributions.

Tax Implications

Understanding the tax treatment of inherited retirement accounts is essential for making smart distribution decisions. The type of account determines whether distributions are taxable.

Account TypeTax Treatment10% Penalty?
Traditional IRAAll distributions taxed as ordinary incomeNo (waived for inherited accounts)
Roth IRATax-free if 5-year rule is metNo
Traditional 401(k)All distributions taxed as ordinary incomeNo (waived for inherited accounts)
Roth 401(k)Tax-free if 5-year rule is metNo
PensionSurvivor payments taxed as ordinary incomeNo

Distribution Strategies to Minimize Taxes

Spread distributions over 10 years

Rather than taking a lump sum, consider taking roughly equal distributions each year over the full 10-year period. This prevents a single large distribution from pushing you into a higher tax bracket. For example, a $500,000 inherited traditional IRA distributed as $50,000 per year results in significantly less total tax than a single $500,000 distribution.

Time distributions to low-income years

If you know you will have a lower-income year (for example, if you plan to take a year off work, go back to school, or retire), consider taking larger distributions in that year when your marginal tax rate is lower.

For inherited Roth IRAs, delay if possible

Since Roth distributions are tax-free, there is no tax reason to withdraw early. Let the account grow tax-free for as long as possible (up to the 10-year deadline) to maximize the benefit.

Consider the standard deduction

If your only income is from an inherited IRA, you may be able to take distributions up to the standard deduction amount ($15,700 for single filers in 2025) with little or no federal tax liability.

Pension Survivor Benefits

Pensions (defined benefit plans) work differently from IRAs and 401(k)s. What survivors receive depends on the payment option the employee chose when they retired.

Joint-and-Survivor Annuity

If the employee chose this option, the surviving spouse continues to receive a percentage of the monthly benefit (typically 50%, 75%, or 100%) for the rest of their life. This is the most common option for married employees.

Single Life Annuity

Payments stop at the employee's death. No survivor benefit is paid. If the employee was married when they chose this option, the spouse must have signed a written consent waiving the survivor benefit.

Period Certain Annuity

Guarantees payments for a set number of years (for example, 10 or 20 years). If the employee dies before the guaranteed period ends, the beneficiary receives the remaining payments.

Pension Benefit Guaranty Corporation (PBGC)

If the employer's pension plan has been terminated and taken over by the PBGC, survivor benefits are still generally protected. Contact the PBGC at 1-800-400-7242 or visit pbgc.gov to check on benefits.

How to Claim an Inherited Retirement Account

  1. 1
    Locate the account

    Check recent tax returns (Form 1099-R), mail from financial institutions, and any documents from the deceased's employer. The National Association of Unclaimed Property can help locate forgotten accounts.

  2. 2
    Contact the plan administrator or custodian

    For employer plans (401k, 403b, pension), contact the employer's HR department or the plan administrator directly. For IRAs, contact the financial institution (Fidelity, Vanguard, Schwab, etc.) holding the account.

  3. 3
    Provide required documentation

    You will typically need: a certified copy of the death certificate, your government-issued ID, the beneficiary designation form (if available), and possibly Letters Testamentary if you are the executor rather than a named beneficiary.

  4. 4
    Choose your distribution method

    Based on your beneficiary status (spouse, non-spouse, eligible designated beneficiary), select the distribution option that best fits your financial situation. Consider consulting a tax advisor before making this decision, as it cannot be easily reversed.

  5. 5
    Open an inherited IRA if needed

    If you are transferring a 401(k) to an inherited IRA (rather than a spousal rollover), you will need to open a new inherited IRA account. The account title must include the deceased person's name (for example, "John Smith, deceased, IRA FBO Jane Smith, beneficiary").

What If There Is No Beneficiary Designated?

If the deceased did not name a beneficiary on their retirement account, or if all named beneficiaries predeceased them, the account typically passes according to the plan's default provisions. In most cases, this means the account goes to the estate.

This is usually the worst-case scenario from a tax perspective. When a retirement account passes to the estate (rather than a designated beneficiary), the 5-year rule typically applies: the entire account must be distributed within 5 years. This compressed timeline often results in higher taxes. Additionally, estate tax rates on accumulated income can be much higher than individual rates.

This is why it is critically important to keep beneficiary designations up to date. Beneficiary designations override wills, so even if a will says "leave my IRA to my daughter," the person named on the IRA beneficiary form will receive the account. Review designations after any major life event: marriage, divorce, birth of a child, or death of a previously named beneficiary.

Frequently Asked Questions

What is the 10-year rule for inherited IRAs?

Under the SECURE Act (effective January 1, 2020), most non-spouse beneficiaries must withdraw all funds from an inherited IRA within 10 years of the original account holder's death. There are no required minimum distributions during the 10-year period (for deaths before the account holder's required beginning date), but the account must be fully emptied by December 31 of the 10th year after death. This replaced the previous "stretch IRA" strategy that allowed distributions over the beneficiary's lifetime.

Do I have to pay taxes on an inherited 401(k)?

It depends on the type of account. Distributions from an inherited traditional 401(k) or traditional IRA are taxed as ordinary income. Distributions from an inherited Roth 401(k) or Roth IRA are generally tax-free, provided the account has been open for at least 5 years. In both cases, the 10% early withdrawal penalty does not apply to inherited retirement accounts, regardless of the beneficiary's age.

Can a spouse roll over an inherited IRA into their own IRA?

Yes. A surviving spouse has a unique option that no other beneficiary has: they can roll the inherited IRA or 401(k) into their own IRA. This is called a "spousal rollover." Once rolled over, the account is treated as if it were always the spouse's own account, with required minimum distributions based on the spouse's own age. This is often the best strategy for younger spouses who do not need the money immediately.

What happens to a retirement account if there is no beneficiary designated?

If no beneficiary is designated on the account, the retirement plan's default rules apply. Typically, the account passes to the estate, which may require full distribution within 5 years (the "5-year rule"). This is the worst outcome from a tax perspective because it accelerates the tax liability and eliminates the option to spread distributions over a longer period. This is why keeping beneficiary designations up to date is critically important.

Are inherited Roth IRAs subject to the 10-year rule?

Yes. The 10-year rule applies to inherited Roth IRAs for non-spouse beneficiaries, just as it does for traditional IRAs. The key difference is that qualified distributions from Roth accounts are tax-free. This means a non-spouse beneficiary must empty the inherited Roth IRA within 10 years, but they will not owe income tax on the distributions (assuming the 5-year rule is met). Beneficiaries may benefit from waiting until year 10 to withdraw, allowing more years of tax-free growth.

What are the exceptions to the 10-year rule?

The SECURE Act identifies five categories of "eligible designated beneficiaries" who are exempt from the 10-year rule and can still stretch distributions over their lifetime: (1) the surviving spouse, (2) minor children of the deceased (but only until they reach the age of majority, then the 10-year clock starts), (3) individuals who are disabled as defined by the IRS, (4) individuals who are chronically ill, and (5) individuals who are not more than 10 years younger than the deceased account holder.

How do I claim a deceased person's 401(k)?

Contact the plan administrator at the deceased person's employer. You will need to provide a certified copy of the death certificate and your identification. The plan administrator will verify you as the designated beneficiary and explain your distribution options. If the account balance is over $5,000, the plan cannot force an immediate distribution. If the deceased had multiple 401(k) accounts from different employers, you will need to contact each plan separately.

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