If a required minimum distribution was missed or too small, calculate the shortfall using the correct account balance, divisor, owner or beneficiary status, and deadline. Request the corrective distribution promptly. Form 5329 reports the shortfall and additional tax, while current instructions describe a reduced rate during the correction window and a possible reasonable-cause waiver.
Retirement forums show families discovering a missed RMD after illness, death, or account transfer and asking which person and year should report it. The posts reveal a record and timing problem; IRS RMD guidance and Form 5329 instructions control correction.
Start here: a practical action plan
- Open the official source and confirm which rule applies to your dates and account.
- Collect the statements, notices, forms, and transaction records named in this guide.
- Recalculate the worked framework with your actual amounts and preserve the arithmetic.
- Set the next deadline in a calendar and save proof when the action is completed.
- Treating a forum answer as authority instead of checking the governing form or notice.
- Spending a temporary reserve before the amount and deadline are final.
- Losing the document trail needed to explain the calculation later.
Identify the person, account, year, and rule first
List every traditional IRA and employer plan, the prior December 31 balance, account owner, birth date, beneficiary status, distribution history, and applicable life-expectancy table. IRA aggregation and employer-plan rules differ. An inherited account can have additional annual and final distribution requirements.
Do not take a random amount before confirming the shortfall. A first-year deferral can create two RMDs in one later calendar year, and an owner’s death can split responsibilities between the final owner RMD and beneficiary rules.
Worked example: correct a $12,000 shortfall
Example: the correctly calculated RMD was $18,000, but only $6,000 was distributed by the deadline. The shortfall is $12,000. The account owner requests a $12,000 corrective distribution and keeps confirmation of the request and settlement dates.
The general excise-tax rate in current guidance can be 25 percent, or 10 percent when eligible correction-window requirements are met. On $12,000, those amounts are $3,000 and $1,200. A reasonable-cause waiver may be requested, but the IRS decides whether to grant it.
| Item | Calculation | Result |
|---|---|---|
| Required amount | Confirmed RMD | $18,000 |
| Distributed by deadline | Account history | $6,000 |
| Shortfall | $18,000 minus $6,000 | $12,000 |
| 25 percent amount | $12,000 x 25% | $3,000 |
| 10 percent amount | $12,000 x 10% | $1,200 |
Prepare Form 5329 and the explanation carefully
Use the Form 5329 instructions for the year the RMD was required. A reasonable-cause request generally includes the shortfall, reason for the error, correction completed or underway, and prevention steps. Follow the specific line instructions rather than paying the maximum amount automatically.
If the original return omitted Form 5329, determine whether to file it separately or with an amended return. Save account statements, custodian correspondence, medical or administrative records relevant to the error, and proof of the corrective distribution.
Prevent a repeat across every account
Create a yearly RMD register with account, custodian calculation, required amount, distribution date, withholding, and year-to-date total. Check it before December rather than during the final week. Do not count a Roth IRA or another ineligible source as satisfying an RMD.
Transfers, rollovers, beneficiary changes, and custodian switches can break automatic instructions. Reconfirm after each change. A tax professional is especially useful for inherited accounts, multiple employer plans, trusts, charity distributions, or a death during the distribution year.
Frequently asked questions
What is the shortfall for a missed RMD?
It is the required amount minus distributions that counted toward that requirement by the deadline.
Should I take the missed amount now?
Generally take reasonable steps to remedy the shortfall promptly, but confirm the amount and account with the custodian or adviser.
What form reports a missed RMD?
Form 5329 reports the additional tax on an RMD shortfall and any requested reasonable-cause waiver.
What is the additional tax rate?
Current guidance generally uses 25 percent, potentially reduced to 10 percent for an eligible timely correction.
Can the IRS waive the additional tax?
Yes. The IRS may waive it when the shortfall resulted from reasonable error and reasonable correction steps are being taken.
Can one IRA distribution satisfy several IRA RMDs?
Some owner IRA RMDs may be aggregated, while employer plans and inherited accounts can follow different rules. Confirm before combining.
Sources and review notes
The calculations and scenarios in this guide are original BreadWinnr worked examples. We recalculated each example and checked that its parts match the stated total. Official sources support the financial concepts. Forum links document the reader problem that prompted the guide and are not treated as financial authority.
Read our research, testing, corrections, and source policy.
This guide provides general financial education. It does not account for your complete financial, tax, legal, or contractual situation.
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