Complete Guide to RMD Calculator for Inherited IRA Rollovers 2026

Inherited IRA rollovers trigger Required Minimum Distributions (RMDs) based on your age and relationship to the deceased account holder. RMD calculations determine how much you must withdraw annually, affecting your tax liability and distribution timeline. Understanding these calculations helps you plan for mandatory withdrawals and associated tax costs.

How RMD Calculations Work for Inherited IRAs

When you inherit an IRA, the IRS requires you to withdraw funds following specific rules. The amount you must withdraw each year depends on several factors: your age, the deceased owner’s age, your relationship to the original account holder, and whether the original owner had begun taking RMDs.

The RMD calculation uses three key components:

• Life expectancy factor: The IRS publishes actuarial tables assigning life expectancy divisors based on age
• Account balance: The value of the inherited IRA on December 31 of the prior year
• Distribution method: Rules differ based on whether you’re a spouse, non-spouse beneficiary, or eligible designated beneficiary

The basic RMD formula divides the prior year-end account balance by the applicable life expectancy divisor. For example, if you inherit a $200,000 IRA and your divisor is 25.5, your RMD equals $7,843 for that year ($200,000 ÷ 25.5).

SECURE Act 2.0 changes (effective 2024) altered these rules significantly. Most non-spouse beneficiaries must now deplete inherited IRAs within 10 years instead of spreading distributions over their lifetime. This accelerated timeline increases annual withdrawal amounts and tax obligations.

Costs and Taxes Associated with Inherited IRA RMDs

RMDs trigger immediate tax consequences because distributions are taxable income in the year received. The tax cost depends on the IRA type and your tax bracket.

Traditional IRA inherited RMDs: These distributions are taxed as ordinary income at your full marginal tax rate. If you inherit a $300,000 traditional IRA and must withdraw $25,000 annually, that $25,000 adds to your taxable income for the year. At a 24% federal tax rate, you owe $6,000 in federal taxes on that withdrawal alone.

Roth IRA inherited RMDs: Distributions from inherited Roth IRAs are tax-free if the account was open for at least five years. However, the five-year rule applies to the original account owner’s opening date, not your inheritance date. Many inherited Roth IRAs meet this requirement, making distributions tax-advantaged.

State income taxes: Most states tax inherited IRA distributions as ordinary income. States like California, New York, and Illinois impose state tax rates between 5-13.3% on top of federal taxes. A $20,000 RMD withdrawal in California (13.3% rate) costs $2,660 in state taxes plus federal taxes.

No early withdrawal penalties: Inherited IRA distributions avoid the 10% early withdrawal penalty, regardless of your age. This applies to all inherited IRAs, whether you’re 35 or 65 years old.

Custodian fees: Your IRA custodian may charge annual maintenance fees ($25-$100) or transaction fees when processing distributions. These fees reduce the account value available for investment and future withdrawals.

Calculating Your 10-Year Inherited IRA Distribution Strategy

Under current SECURE Act rules, most non-spouse beneficiaries must completely distribute inherited IRAs within 10 years. This requirement creates flexibility in when you withdraw during that window, but not whether you must withdraw completely.

The 10-year rule mechanics: You must finish all distributions by December 31 of the 10th year following the year of death. If the original owner died in 2025, your final distribution deadline is December 31, 2035. You can withdraw nothing for years 1-9 and take everything in year 10, or distribute evenly across all 10 years, or any combination in between.

Calculating annual amounts: To estimate tax impact, divide the inherited account balance by the remaining years in your 10-year window. If you inherit $150,000 and are in year 3 of the distribution period, you have 8 years remaining. An equal distribution strategy requires $18,750 annually ($150,000 ÷ 8).

Impact of account growth: Your inherited IRA continues earning investment returns during the distribution period. A declining account balance due to withdrawals typically results in lower required distributions in later years, but investment gains could offset this effect.

Exceptions to the 10-year rule: Certain beneficiaries have different requirements. Surviving spouses can delay distributions further and have additional rollover options. Minor children, disabled beneficiaries, and chronically ill beneficiaries may qualify as “eligible designated beneficiaries” and retain stretch IRA provisions.

Using Our Free Calculators to Plan Inherited IRA Withdrawals

Our suite of retirement calculators helps you model different scenarios and understand the costs associated with your inherited IRA strategy.

Start with the RMD Calculator to compute your exact required minimum distribution amount. Enter your age, the inherited account balance, and whether you’re a spouse or non-spouse beneficiary. The calculator applies current IRS life expectancy tables and shows your annual withdrawal requirement.

Use the Early Withdrawal Penalty Calculator to confirm that inherited IRA distributions avoid the 10% penalty, even if you’re under age 59½. This calculator illustrates how inherited IRA distributions differ from regular early withdrawals.

Check the Retirement Income Calculator to estimate your total taxable income when you add RMD distributions to wages, Social Security, and other income sources. This helps you anticipate your tax bracket and federal tax liability.

These calculators provide educational estimates based on your specific numbers, making it easier to understand RMD mechanics and tax impact before you actually take distributions.

Frequently Asked Questions About Inherited IRA RMDs

Do I have to take an RMD in the year the original owner died?

No, not necessarily. If the original IRA owner had not yet begun taking RMDs, you typically don’t need to take a distribution in the year of death. However, if the owner was over age 72 and had already started RMDs, any remaining 2024 or 2025 RMD must still be taken (either by the estate or by you). Check with your custodian about whether they’ll calculate this amount.

Can I convert inherited IRA distributions to a Roth?

Non-spouse beneficiaries cannot convert inherited IRA distributions to a Roth IRA. This rule exists regardless of your income level or filing status. Surviving spouses can treat the inherited IRA as their own and perform Roth conversions, but non-spouse beneficiaries are prohibited.

How are inherited IRA distributions taxed differently from my own IRA withdrawals?

The tax treatment is identical in terms of rate—both are taxed as ordinary income. The key difference is that inherited IRA distributions never trigger the 10% early withdrawal penalty, even if you’re much younger than age 59½. Additionally, you must follow different RMD rules based on your relationship to the deceased and whether they were your spouse.

What happens if I miss an inherited IRA RMD deadline?

Missing an RMD deadline results in a 25% penalty on the shortfall amount (reduced to 10% if corrected within two years). If you were supposed to withdraw $10,000 and took nothing, you owe a $2,500 penalty. File Form 5329 with your tax return to report the missed RMD and request penalty waiver if you have reasonable cause.

Do inherited Roth IRAs have RMD requirements?

Yes, inherited Roth IRAs are subject to the same 10-year distribution requirement as inherited traditional IRAs. The advantage is that distributions from inherited Roth IRAs are tax-free (assuming the five-year holding period is satisfied). You still must complete the full distribution by the 10-year deadline, but you avoid the income tax burden.