Understanding Form 5329

What Is Form 5329?

Form 5329 is the IRS penalty form for retirement accounts. It calculates and reports the additional taxes you owe when something goes wrong: you took money out too early, you put too much money in, or you did not take enough money out when you were required to.

The form covers three separate penalties, each in its own section, and you may need to complete one section or all three depending on what happened. The form is also where you claim exceptions to the early withdrawal penalty and where you request a waiver on missed RMD penalties.

Filing Form 5329 is how you tell the IRS "I know I made a mistake, here is what I owe, and here is why I think you should reduce or eliminate the penalty." Not filing it when you should have does not make the penalty go away. It just means the IRS finds it later, on their timeline, without your side of the story.

When Do You File It?

Form 5329 is filed with your federal tax return (Form 1040) in any year you owe an additional tax on a retirement account. If the penalty applies to the current tax year, attach Form 5329 to your return and pay the penalty with your tax payment.

If you missed an RMD in a prior year and are filing the form late, you can file Form 5329 as a standalone form for that specific prior year. There is no statute of limitations on the RMD excise tax. The IRS can assess the penalty for any year it was missed, regardless of how long ago that was.

Filing the form proactively with a waiver request is always better than waiting for the IRS to discover the error through the matching process. The filing fee is nothing. The form itself is the penalty calculation. You pay what the form says you owe, or you attach a waiver letter explaining why you should owe less.

Part I: Early Withdrawal Penalty

Part I calculates the 10% additional tax on early distributions from retirement accounts. If you took money from a traditional IRA, 401(k), 403(b), or other retirement account before age 59½, your custodian reported it on Form 1099-R. The 10% penalty is calculated on the taxable amount of the distribution.

Part I is also where you claim exceptions to the penalty. The IRS provides a list of exception codes, and you enter the code and the amount that qualifies for the exception. Common exceptions include the Rule of 55 (separation from service at age 55 or older for employer plans), substantially equal periodic payments (SEPP/72(t)), qualified first-time homebuyer distributions (up to $10,000 lifetime from an IRA), unreimbursed medical expenses exceeding 7.5% of AGI, and IRS levy distributions.

If your 1099-R shows distribution code 1 (early distribution, no known exception) but you qualify for an exception, Part I of Form 5329 is where you claim it. Your custodian does not determine whether an exception applies. You do, on this form.

Parts III and IV: Excess Contributions to IRAs

Form 5329 figures the 6% excise tax on excess IRA contributions in two places: Part III for Traditional IRAs and Part IV for Roth IRAs. An excess contribution is any amount contributed to a traditional or Roth IRA that exceeds the annual limit, any contribution made when you were not eligible (Roth income over the phase-out, traditional IRA without earned income), or any rollover that did not qualify as a valid rollover.

The 6% penalty applies for every year the excess remains in the account. If you contributed $7,000 to a Roth IRA and your income was over the limit, the entire $7,000 is excess, reported in Part IV. The penalty is $420 per year until the excess is removed or absorbed. A Traditional IRA excess works the same way, just calculated in Part III.

Each part tracks the excess from the current year and any carryover excess from prior years. If you corrected the excess by your tax filing deadline (including extensions) by withdrawing the contribution plus Net Income Attributable, the penalty does not apply and you do not need to complete that part. If you missed the correction deadline, that part is where the 6% is calculated and reported.

Part IX: Missed or Insufficient RMDs

Part IX calculates the excise tax on Required Minimum Distributions that were not taken or were taken in an insufficient amount. The penalty is 25% of the shortfall between what you were required to take and what you actually took.

If your RMD was $20,000 and you took $12,000, the shortfall is $8,000 and the penalty is $2,000. If you took nothing, the penalty is 25% of the full $20,000, which is $5,000.

Under SECURE 2.0, if you correct the shortfall within the correction window (generally within two years of the year the RMD was due), the penalty drops to 10%. The correction window is the key. Taking the missed distribution and filing Form 5329 within two years allows you to claim the reduced 10% rate. Outside that window, the 25% rate applies.

Part IX is straightforward. You enter the required distribution amount, the amount actually distributed, and the shortfall. The form calculates the penalty. If you are requesting a waiver, you enter the shortfall but write "RC" next to the penalty line and attach a letter.

How to Request a Penalty Waiver

The IRS routinely grants waivers on missed RMD penalties when the taxpayer can demonstrate reasonable cause and that the corrective distribution has been taken. The process is built into Form 5329 itself.

On Part IX, you enter the shortfall amount and the penalty calculation. Then you write "RC" (reasonable cause) on the line where the penalty would normally be entered. You attach a letter to the form explaining what happened, why it happened, and confirming that the missed distribution has been taken.

The letter should include the amount of the corrective distribution, the date it was taken, and the account it was taken from. The explanation does not need to be elaborate. "I was not aware that I was required to take a distribution. Upon learning of the requirement, I immediately took the corrective distribution on [date] in the amount of [$X]."

The IRS processes most waiver requests without follow-up if the letter is clear, the corrective distribution is documented, and the error appears to be a genuine oversight. The waiver is at the IRS's discretion, but approval rates for first-time missed RMDs with corrective distributions are high.

Filing the form proactively with a waiver letter is a fundamentally different experience than receiving an IRS notice assessing the penalty without your explanation attached. One is a conversation you initiated. The other is a bill.

Filing for a Prior Year

If you missed an RMD three years ago and just discovered the error, you file Form 5329 for that specific prior year. Use the version of Form 5329 that corresponds to the tax year the RMD was missed. If the RMD was due for 2023, use the 2023 version of Form 5329.

File it as a standalone form (not attached to the current year's return). Include the waiver letter and documentation of the corrective distribution. Mail it to the IRS. There is no electronic filing option for standalone prior-year Forms 5329.

The IRS will process the form and either accept the waiver or send a response requesting additional information.

Filing for a prior year does not amend your original tax return for that year. Form 5329 is a separate filing that addresses only the retirement account penalty. If the missed RMD also affected other items on the return (like taxable income), you may also need to file an amended return (Form 1040-X) for that year.

Common Mistakes on Form 5329

The most frequent errors on Form 5329 involve Part IX. People calculate the penalty using the wrong RMD amount because they used the wrong life expectancy table, the wrong prior-year balance, or forgot to aggregate all their IRAs. The penalty is based on the shortfall, and if the RMD calculation itself is wrong, the shortfall calculation is wrong, and the penalty is either too high or too low.

Using the Uniform Lifetime Table when the Joint Life Table applies (because your spouse is more than 10 years younger and is your sole beneficiary) overstates the RMD and overstates the shortfall. Using a single IRA balance instead of the aggregated total across all traditional IRAs understates the RMD and understates the shortfall.

Another common mistake is filing the form without the waiver letter. The form by itself calculates the penalty. The letter is what requests the reduction. Without the letter, the IRS processes the penalty at the full rate. You can still request a waiver after the fact, but the process is easier if the letter is attached at the time of filing.

A third mistake is not taking the corrective distribution before filing. The waiver request is significantly weaker if you file the form, request a waiver, and say you plan to take the distribution later. The IRS wants to see that the correction has already been made. Take the distribution first. File the form second.

Frequently Asked Questions