RMD Calculator — Required Minimum Distribution

The IRS Uniform Lifetime Table is the foundation of every RMD calculation, determining how much you must withdraw from your Traditional IRA, 401(k), or other tax-deferred retirement account each year. Understanding how the table works and which version applies to your situation ensures you take the correct distribution and avoid the 25% penalty on shortfalls.

How the IRS Uniform Lifetime Table Works

The Uniform Lifetime Table provides a distribution period based on your age. You divide your prior year-end account balance by this factor to determine your annual RMD. At age 73, the factor is 26.5, meaning you must withdraw approximately 3.77% of your balance. At age 80, the factor drops to 20.2 (4.95%), and by age 90, it reaches 12.2 (8.20%). The decreasing factors ensure that as you age, you withdraw a larger percentage of your remaining balance.

The current Uniform Lifetime Table was updated effective January 1, 2022, reflecting longer life expectancies. The new table generally produces smaller RMDs than the old table, giving retirees more flexibility to keep money growing tax-deferred. For example, at age 75, the old factor was 22.9 while the new factor is 24.6, reducing the RMD by about 7%.

When to Use Different IRS Life Expectancy Tables

The IRS provides three different tables for RMD calculations. The Uniform Lifetime Table is the default for most account owners and applies in the vast majority of cases. The Joint Life and Last Survivor Expectancy Table is used only when your sole beneficiary is your spouse who is more than 10 years younger than you, resulting in a longer distribution period and smaller RMDs.

The Single Life Expectancy Table is used for inherited IRA beneficiaries, not for original account owners. If you inherited an IRA and are an eligible designated beneficiary using the stretch method, this is the table that determines your annual distribution. Use our inherited IRA calculator to model those distributions accurately.

Practical Examples of RMD Calculations Using the Table

Consider a 75-year-old retiree with a $500,000 Traditional IRA balance as of December 31 of the prior year. The Uniform Lifetime Table factor at age 75 is 24.6. The RMD is $500,000 divided by 24.6, which equals $20,325. This amount must be withdrawn and reported as ordinary income by December 31.

If the same retiree has a 60-year-old spouse as the sole IRA beneficiary, they would use the Joint Life Table instead. The joint factor for a 75-year-old with a 60-year-old beneficiary is approximately 27.4, reducing the RMD to $18,248. This is a savings of over $2,000 per year in forced distributions.

Planning Ahead With the RMD Table

Looking ahead at the table reveals how rapidly RMDs increase with age. A $500,000 balance at age 73 requires a $18,868 RMD (3.77%), but by age 85, assuming the balance remains similar, the RMD jumps to $31,250 (6.25%). This escalation is why many financial planners recommend Roth conversions in the years before RMDs begin. Visit our full RMD calculator for detailed 15-year projections showing how your RMDs evolve over time, factoring in investment growth and annual withdrawals.

If you have multiple retirement accounts, calculating your total Required Minimum Distribution becomes more complex because the IRS has different aggregation rules for different account types. Taking the wrong amount from the wrong account can trigger penalties even if your total withdrawals exceed the combined RMD. Here is how to handle RMDs across multiple accounts correctly.

IRA RMD Aggregation Rules

For Traditional IRAs, SEP IRAs, and SIMPLE IRAs, you calculate the RMD separately for each account using each account's December 31 balance. However, you can satisfy the total IRA RMD by withdrawing from any one or any combination of your IRAs. This aggregation flexibility allows strategic tax planning.

For example, if you have three IRAs with RMDs of $8,000, $5,000, and $3,000 respectively (total $16,000), you could take the entire $16,000 from the largest IRA, split it evenly, or take it from the account with the worst investment performance. This flexibility lets you rebalance your portfolio through your RMD withdrawals.

401(k) and 403(b) RMD Rules: No Aggregation

Unlike IRAs, each 401(k) plan's RMD must be taken from that specific plan. If you have two 401(k) accounts from former employers, you may want to calculate and take each plan's RMD separately. You cannot take both RMDs from a single plan. This rule also applies to 403(b) plans, although 403(b) plans can be aggregated with other 403(b) plans but not with 401(k)s or IRAs.

This is a strong argument for consolidating old 401(k) accounts into a single IRA rollover. Once consolidated, the IRA aggregation rules apply, giving you more withdrawal flexibility. However, consider that 401(k) plans may offer creditor protection advantages that IRAs do not provide in some states.

The Still-Working Exception for 401(k) Plans

If you are still employed and do not own more than 5% of the company, you can delay RMDs from your current employer's 401(k) plan until you actually retire, even past age 73 or 75. This exception does not apply to IRAs or 401(k) plans from previous employers. Only your current employer's plan qualifies.

Some retirees who continue part-time work with their employer can roll old 401(k)s and even IRA funds into their current employer's plan to take advantage of this exception. This strategy delays all RMDs until actual retirement, allowing continued tax-deferred growth. Check with your plan administrator to confirm your plan accepts incoming rollovers.

Step-by-Step Process for Multiple Account RMDs

Each year by January 31, gather the December 31 prior year balance for every tax-deferred retirement account. Calculate each account's individual RMD using the IRS Uniform Lifetime Table factor for your current age. Group accounts by type: IRA family, each 401(k) separately, and 403(b) family. Decide your withdrawal strategy for each group. Execute withdrawals by December 31, or earlier if this is your first RMD year with an April 1 deadline.

Use our RMD calculator to run projections for your largest account, then repeat for each additional account. For tax impact analysis, combine your total RMDs with other income sources using our capital gains tax calculator to see your complete tax picture.

Missing your Required Minimum Distribution deadline is one of the most expensive mistakes in retirement planning, with penalties that can reach 25% of the amount consider have withdrawn. The good news is that SECURE 2.0 significantly reduced the penalty from 50%, and the IRS offers a correction mechanism that can lower it further to just 10% if you act quickly.

Current RMD Penalty Structure Under SECURE 2.0

If you fail to take your full RMD by the December 31 deadline, the IRS imposes an excise tax of 25% on the shortfall amount. If your required distribution was $20,000 and you only withdrew $12,000, the shortfall is $8,000 and the penalty is $2,000. Before SECURE 2.0, this penalty was a punishing 50%, so the reduction provides some relief for honest mistakes.

SECURE 2.0 also introduced a correction window: if you take the missed distribution within two years and file an amended return, the penalty drops to just 10%. On the same $8,000 shortfall, the penalty decreases from $2,000 to $800. This correction window makes it critical to catch and fix missed RMDs as quickly as possible.

How to Fix a Missed RMD

Take the missed distribution immediately. Contact your IRA custodian or plan administrator and request a distribution for the shortfall amount. The withdrawal is still taxable as ordinary income in the year you receive it. File IRS Form 5329 with your tax return for the year the RMD was missed, and calculate the penalty on Part IX of the form.

To request a waiver or reduction of the penalty, attach a letter explaining the reason for the missed distribution and the steps you have taken to prevent future occurrences. The IRS has historically been lenient with first-time offenders who show reasonable cause, especially for taxpayers who are elderly, ill, or relied on incorrect advice from a financial advisor.

Common Reasons People Miss Their RMD

The most frequent cause is simply forgetting the December 31 deadline, especially during the first year when many retirees are unfamiliar with the process. Other common causes include having multiple accounts and overlooking one, confusing the IRA aggregation rules with 401(k) rules, incorrectly calculating the RMD amount, and health emergencies that prevent timely action.

Custodian errors also occur. Sometimes a brokerage fails to process a distribution request in time or processes the wrong amount. While you are ultimately responsible for your RMD, documenting custodian errors strengthens your case for penalty relief.

Preventing Missed RMDs Going Forward

Set up automatic distributions with your IRA custodian. Most major brokerages including Fidelity, Schwab, and Vanguard offer automated RMD services that calculate and distribute the correct amount on a schedule you choose, whether annually, quarterly, or monthly. This is the single most effective prevention strategy.

Create calendar reminders for October and November to verify that your RMD has been taken or is scheduled. Keep a master spreadsheet of all retirement accounts with their December 31 balances and calculated RMDs. Review your accounts each January to confirm the prior year's RMD was completed. Our RMD calculator provides 15-year projections so you can plan ahead, and setting up annual check-ins with a tax advisor ensures nothing falls through the cracks.