SuperMoney logo
SuperMoney logo

Letter 6398C: What You Need to Know

SuperMoney Team avatar image
Last updated 11/15/2024 by
SuperMoney Team
Fact checked by
Ante Mazalin
Summary:
IRS Letter 6398C is a notice from the IRS concerning penalties associated with excess contributions to retirement accounts. This letter indicates that a penalty for late payment may apply, particularly if additional taxes related to excess contributions have not been paid promptly. Understanding IRS Letter 6398C can help you navigate what it means for your tax obligations, the potential penalties involved, and the steps you can take to address or avoid these fees in the future. This guide will help you understand the purpose of IRS Letter 6398C, how to respond, and best practices for managing retirement contributions effectively.
Receiving IRS Letter 6398C can be unsettling, but understanding its purpose can help ease your concerns. This letter specifically addresses excess contributions made to retirement accounts, which are subject to additional taxes if not corrected or withdrawn. In many cases, this notification arises when the IRS has identified contributions that exceed the annual limits set for IRAs or other retirement plans. In this article, we’ll break down what IRS Letter 6398C means, why it’s issued, and the steps you can take to resolve or prevent future issues related to excess contributions.
Struggling with IRS notices? If you’ve received an IRS letter and aren’t sure how to handle it, you might want to explore professional tax relief options. Optima Tax Relief has helped thousands of people resolve their tax issues and get back on track with the IRS. Learn more about how they can assist you with your situation.

Get Competing Personal Loan Offers In Minutes

Compare rates from multiple vetted lenders. Discover your lowest eligible rate.
Get Personalized Rates
It's quick, free and won’t hurt your credit score

What is IRS letter 6398C?

IRS Letter 6398C is an official notice from the Internal Revenue Service that informs taxpayers about a penalty for failing to pay the additional tax on excess contributions to retirement accounts. This letter generally indicates that the taxpayer exceeded the contribution limit for a retirement plan, such as an IRA, and did not pay the associated tax on time. The IRS sends this letter as a warning that additional taxes and penalties may apply if prompt action is not taken to correct the contribution amount or pay the overdue tax.

Why you might receive IRS letter 6398C

IRS Letter 6398C can be triggered by several situations, most commonly related to excess contributions in retirement accounts:
  • Exceeding contribution limits: Retirement accounts have annual contribution limits, and contributions over these limits incur additional taxes.
  • Late payment of additional tax: The IRS imposes penalties on late payments for the tax associated with excess contributions.
  • Uncorrected contributions: If contributions aren’t withdrawn or corrected, the IRS may assess a tax penalty for each year the excess remains.
Receiving this letter means that immediate action may be required to avoid further penalties or fines.

How IRS letter 6398C affects you

The implications of IRS Letter 6398C can be significant, as it signals possible tax penalties due to excess contributions to retirement accounts. Here’s what this letter could mean for your tax situation:

Additional tax liability

The primary impact of IRS Letter 6398C is the additional tax liability it imposes on any excess contributions to retirement accounts. You may owe both the tax on the excess amount and a penalty for not paying this tax on time.

Potential penalties for late payment

IRS Letter 6398C outlines potential penalties if you fail to address the overdue tax. These penalties can accrue interest and increase over time, adding to your tax burden.

Impact on retirement account compliance

Failing to address issues raised in IRS Letter 6398C may result in increased scrutiny of your retirement accounts in future tax filings. Ensuring compliance with IRS contribution limits each year can prevent additional penalties and protect your retirement savings.

Pro tip

To avoid future penalties, keep track of your retirement account contributions each year to ensure you don’t exceed IRS limits. Review your account statements regularly, especially if you contribute to multiple retirement accounts.

Steps to take when you receive IRS letter 6398C

If you receive IRS Letter 6398C, here are steps you can take to manage the situation and address any penalties:
  • Read the letter carefully: Understand the reason for the notice and the actions the IRS is asking you to take.
  • Review your contributions: Check all contributions to your retirement accounts for the tax year to identify any excess amounts.
  • Calculate any additional tax owed: Use IRS guidance to calculate the tax due on excess contributions and pay promptly to avoid further penalties.
  • Contact a tax professional: Consider consulting a tax professional if you need assistance understanding the notice or calculating the penalty.

How to respond to IRS letter 6398C

Responding to IRS Letter 6398C effectively can help you minimize any additional tax impact. Here’s what to do:

Reviewing and adjusting contributions

Check your retirement accounts for excess contributions and take action to adjust them, either by withdrawing excess amounts or applying them to the next tax year if eligible.

Paying any outstanding tax promptly

Pay the additional tax on excess contributions as soon as possible to avoid compounding penalties and interest.

Following up with the IRS

If you have questions or need clarification, reach out to the IRS directly using the contact information provided in the letter. Prompt communication can help resolve issues quickly and ensure you’re taking the correct actions.

Pro tip

Use IRS-approved tax software or consult a financial advisor for help managing retirement account limits and avoiding excess contributions.

How to avoid future IRS letter 6398C notices

Preventing future IRS notices related to excess contributions is possible with careful planning and monitoring. Here are some preventive steps to consider:
  • Monitor contributions closely: Track contributions across all retirement accounts each year to ensure you stay within IRS limits.
  • Use professional tax advice: A financial advisor or tax professional can provide guidance on optimizing contributions while staying compliant with IRS rules.
  • Stay informed on contribution limits: IRS contribution limits may change yearly, so make sure to stay updated and adjust contributions accordingly.
Staying proactive with your retirement contributions can reduce the risk of excess contributions and related IRS penalties.

Pro tip

Consider using tax preparation software with retirement planning features to automatically track contributions and alert you to potential excesses.

Consequences of not responding to IRS letter 6398C

Failing to address IRS Letter 6398C and any associated penalties can lead to several consequences:
  • Additional interest and penalties on unpaid taxes related to excess contributions.
  • Increased scrutiny from the IRS, which may affect future tax filings and retirement accounts.
  • Possible impacts on the tax-exempt status of your retirement accounts if excess contributions remain unaddressed.
Responding promptly to IRS notices and resolving any issues can prevent these complications and protect your retirement funds.
Looking for the best way to reduce your tax burden? We’ve compiled a list of the Best Tax Relief Companies to help you navigate tax challenges and save money. Click here to discover trusted experts who can assist you with tax resolution, IRS negotiations, and more!

Frequently asked questions

What happens if I don’t pay the tax on excess contributions promptly?

If you fail to pay the tax on excess contributions promptly, you may incur additional penalties and interest. These charges accumulate over time, potentially increasing the amount owed to the IRS. Delays in payment could also lead to further scrutiny of your retirement accounts in future tax years.

Can I carry over excess contributions to the next tax year?

In some cases, excess contributions can be applied to the next tax year, but strict IRS rules apply. You would need to reduce contributions for the following year by the excess amount. It’s essential to consult a tax professional to ensure compliance with IRS regulations when managing excess contributions across multiple tax years.

How can I correct an excess contribution without incurring a penalty?

To correct an excess contribution without incurring a penalty, you generally need to withdraw the excess amount and any earnings on it before the tax filing deadline (including extensions). This timely correction helps avoid the additional tax on the excess contribution. Consult the IRS guidelines or a tax advisor to ensure you meet all requirements for penalty-free correction.

Does IRS letter 6398C mean I owe money immediately?

Receiving IRS Letter 6398C does not always mean you owe money immediately. The letter serves as a notice of potential penalties if the additional tax on excess contributions is not paid. However, if a balance is due, it’s advisable to pay promptly to avoid further penalties and interest.

Are there penalties for honest mistakes in retirement contributions?

The IRS may still impose penalties for excess contributions, even if they result from an honest mistake. However, correcting the excess promptly and communicating with the IRS if you believe the error was unintentional may help reduce penalties. Tax professionals can also provide guidance on handling such situations effectively.
Need help understanding other IRS letters and notices? Visit our comprehensive guide to IRS Letters and Notices or search for the document you received in the table below.
IRS Letter or Notice Number
Notice Description
CP01The IRS verified your claim of identity theft and will monitor your account.
CP01HThe IRS received a tax return with a social security number that belongs to a dead person.
CP02HMoney is due on an amended return based on a grant received due to Hurricane Katrina, Rita, or Wilma.
CP03CYou received the First-Time Homebuyer Credit for a house you purchased.
CP04You may be eligible for tax deferment because either you or a spouse served in a combat zone, a qualified contingency operation, or a hazardous duty station during the tax year specified on your notice.
CP08You may be entitled to additional money due to the Additional Child Tax Credit.
CP10Your tax return changed due to a miscalculation, and the refund you wanted to apply to an estimated tax payment has changed.
CP10AYour tax return changed due to a miscalculation of the Earned Income Credit, and the refund you wanted to apply to an estimated tax payment has changed.
CP11You owe money because the IRS amended your return due to a miscalculation.
CP11AYour tax return changed due to a miscalculation of the Earned Income Credit, and the refund you wanted to apply to an estimated tax payment also changed.
CP11MYour tax return changed due to a miscalculation of the Making Work Pay and Government Retiree Credit, and the refund you wanted to apply to an estimated tax payment has changed.
CP12You are due a bigger refund because the IRS corrected one or more mistakes on your tax return.
CP12AThe IRS made changes to correct the Earned Income Credit (EIC) claimed on your tax return.
CP12E or CP12FThe IRS corrected a miscalculation on your return.
CP12MThe IRS made changes to the computation of the Making Work Pay and/or Government Retiree Credits on your return.
CP12RThe IRS made changes to the computation of the Rebate Recovery Credit on your return.
CP13The IRS made changes to your return due to a miscalculation. There is no refund or amount due. Your balance is zero.
CP13AThe IRS made changes to your return due to a miscalculation of the Earned Income Credit. There is no refund or amount due. Your balance is zero.
CP13MThe IRS made changes to your return due to a miscalculation of the Making Work Pay credit or the Government Retiree Credit. There is no refund or amount due. Your balance is zero.
CP13RThe IRS made changes to your return due to a miscalculation of the Recovery Rebate Credit. There is no refund or amount due. Your balance is zero.
CP14You owe money on unpaid taxes.
CP16The IRS made changes to your return due to a miscalculation. The refund you were due was applied to other tax debts.
CP21AYou owe money due to the changes you requested that the IRS make on your tax returns.
CP21BYou are due a refund due to the changes you requested that the IRS make on your tax returns. The money should arrive within 2 to 3 weeks.
CP21CThe IRS made the requested changes to your tax return. You will not receive a refund, and there is no tax due. Your balance is zero.
CP21EAs a result of your recent audit, the IRS made changes to your tax return, and you owe money as a result of those changes.
CP21IThe IRS made changes to your tax return relating to the Individual Retirement Arrangement (IRA) taxes. You owe money due to the changes.
CP22AThe IRS made the changes you requested, and you owe money as a result.
CP22EAs a result of your recent audit, the IRS changed your tax return, and you now owe money.
CP22IThe IRS made changes to your tax return relating to the Individual Retirement Arrangement (IRA) taxes. You owe money due to the changes.
CP23The IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. You owe taxes due to these changes.
CP24The IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. This resulted in an overpayment of estimated taxes.
CP24EThe IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. This resulted in an overpayment of estimated taxes.
CP25The IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. You are not due a refund, nor do you owe any money. Your balance is zero.
CP31You need to update your address because your refund check was returned to the IRS.
CP45The IRS was unable to apply your overpayment to your estimated tax as you requested.
CP49The IRS used all or part of your refund to pay a tax debt.
CP53Your refund check will be sent by mail because the IRS can’t provide your refund through direct deposit.
CP57The bank declined your payment, so the IRS was unable to draft funds from your bank account.
CP71A reminder of the amount you owe in tax, penalty, and interest.
CP71AA reminder of the amount you owe in tax, penalty, and interest.
CP71CA reminder of the amount you owe in tax, penalty, and interest.
CP71DA reminder of the amount you owe in tax, penalty, and interest.
CP88The IRS is holding your refund because you haven't filed one or more tax returns, and it believes you will owe tax.
CP90The IRS is notifying you of its intent to levy certain assets for unpaid taxes. You have the right to dispute the levy in a Collection Due Process hearing.
CP91The IRS will levy up to 15% of your social security benefits for unpaid taxes.
CP120The IRS needs documentation of your tax-exempt status.
CP120AYour organization’s tax-exempt status has been revoked because it failed to file a Form 990 series return for three consecutive years.
CP130You may no longer need to pay the Alternative Minimum Tax (AMT) because your tax return filing requirements changed.
CP152The IRS received your return.
CP153The IRS will send your refund by mail because your direct deposit did not go through.
CP161You have an unpaid balance due to the IRS.
CP166Your monthly payment to the IRS did not go through due to insufficient funds in your bank account.
CP178You may no longer owe excise tax because your tax return filing requirements changed.
CP231You need to update your address because your refund was returned to the IRS.
CP259You did not file the business tax return identified in the notice.
CP259AYou should have filed these forms but did not – Form 990/990-EZ, Return of Organization Exempt From Income Tax, or Form 990-N (e-Postcard).
CP259BThe IRS requires you to file these forms but did not – Form 990-PF, Return of Private Foundation or Section 4947(a)(1) Nonexempt Charitable Trust Treated as a Private Foundation.
CP259CThe IRS believes that you are a private foundation, but did not file the required Form 990-PF, Return of Private Foundation or Section 4947(a)(1) Nonexempt Charitable Trust Treated as a Private Foundation.
CP259DYou must file this form, but you did not – Form 990-T, Exempt Organization Business Income Tax Return.
CP259EYou should have filed this form, but you did not – Form 990-N (e-Postcard) or Form 990/990-EZ, Return of Organization Exempt From Income Tax.
CP259FThe IRS requires you to file this form but did not – Form 5227, Split-Interest Trust Information Return.
CP259GThe IRS requires you to file this form, but you didn’t – Form 1120-POL, U.S. Income Tax Return for Certain Political Organizations.
CP259HAs a tax-exempt political organization, you must file this form, but you did not – Form 990/990-EZ, Return of Organization Exempt From Income Tax.
CP276AYou submitted your tax liability schedule incorrectly. The IRS typically charges a Federal Tax Deposit (FTD) penalty for this but did not this time.
CP276BThe IRS did not receive the correct amount of tax deposits. It normally charges a Federal Tax Deposit (FTD) penalty but did not this time.
CP297The IRS is notifying you of its intent to levy certain assets for unpaid taxes. You have the right to dispute the levy at a Collection Due Process hearing.
CP297AThe IRS has levied your assets for unpaid taxes. You have the right to dispute the levy at a Collection Due Process hearing.
CP298The IRS notifying you of its intent to levy up to 15% of your social security benefits for unpaid taxes.
CP501You have a balance due on one of your tax accounts.
CP503You have an unpaid balance on one of your accounts, and the IRS has not heard from you.
CP504You have an unpaid amount due on your account. If you do not pay immediately, the IRS will levy your state income tax refund to apply it to the amount you owe.
CP504BYou have an unpaid amount due on your account. If you do not pay immediately, the IRS will levy certain property or rights to property to apply it to the amount you owe.
CP521A reminder that you have an installment agreement payment due.
CP523You have defaulted on your payment agreement. Therefore the IRS is terminating the agreement and will levy your assets.
CP601Usted tiene un saldo pendiente de pago (dinero que le debe al IRS) en una de sus cuentas contributivas.
CP603No hemos recibido respuesta de parte de usted y todavía tiene un saldo sin pagar en una de sus cuentas contributivas.
CP604Usted tiene un saldo sin pagar en su cuenta. De no pagar esta cantidad inmediatemente, el IRS embargará cualquier reembolso de impuestos estatales al que tenga derecho y aplicarlo al pago de su deuda.
CP604BUsted tiene un saldo sin pagar en su cuenta. De no pagar esta cantidad inmediatemente, el IRS embargará ciertas propiedades o derechos de propiedad y lo aplicará al pago de su deuda.
CP621Este aviso es para notificarle que usted tiene un plan de pagos a plazos vencido. Por favor, envíe el pago inmediatamente.
CP623Este aviso es para informarle nuestra intención de cancelar su plan de pagos a plazos y confiscar (embargar) sus bienes. Usted incumplió en su acuerdo.
CP711Nosotros realizamos cambios a su planilla debido a que entendemos que hubo un cálculo erróneo. Como resultado de estos cambios, usted adeuda dinero por sus contribuciones.
CP721Hicimos el(los) cambio(s) que usted solicitó a su declaración de impuestos para el año tributario que aparece en su aviso. Como resultado de éste(estos) cambio(s) usted debe dinero en sus impuestos.
CP722Hicimos el(los) cambio(s) que usted solicitó a su declaración de impuestos para el año tributario que aparece en su aviso. Como resultado de éste(estos) cambio(s) usted debe dinero en sus impuestos.
CP771Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP772Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP773Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP774Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP959Usted no radicó su planilla de contribución de negocios identificada en este aviso.
CP2000The income or payment information on file doesn’t match your tax return. The discrepancy may result in an increase or decrease in your tax due.
CP3219AThe IRS has received information that is different from what you reported on your tax return. This may result in an increase or decrease in your tax.
CP3219NThe IRS didn’t receive your tax return, so it calculated your return based on the information received from employers, financial institutions, and others. If you want to challenge the proposed tax, you have 90 days from the date of this notice. If you are outside the country, you have 150 days.
Letter 0012CThe IRS needs additional information to process your tax return.
Letter 0484CThe IRS wants a completed
Letter 0525Updates you on proposed changes after an IRS examination. Any changes are explained and details the refund due or taxes owed.
Letter 531IRS Notice of Deficiency. The information the IRS received about you was different from what you reported on your return.
Letter 0668D(LP 68)The IRS released their levy.
Letter 0549CYour tax bill was paid.
Letter 0681CThe IRS accepted your payment proposal. However, this is not a formal Installment Agreement.
Letter 0757CYou did not adhere to the terms of your Installment Agreement.
Letter LT 11The IRS plans to seize your property or rights to property.
Letter 1058The IRS has not received your payment. It plans to seize your property or rights to property.
Letter 1615 (LT 18)You must respond to the IRS within 10 days of this notice regarding past due tax returns.
Letter 1737 (LT 27)Complete and sign Form 433F, Collection Information Statement.
Letter 1961CYour application for a Direct Debit Installment Agreement was declined. It explains why and what you need to do to qualify.
Letter 1962CYour application for a
Letter 2050 (LT 16)The IRS is trying to collect unpaid taxes from you from returns that have been filed or from returns that have not been filed.
Letter 2257CThe IRS is providing the payoff amount that you requested.
Letter 226-JAn IRS letter to large employers notifying them that they may be liable for an Employer Shared Responsibility Payment (ESRP).
Letter 2271CA request for an Installment Agreement has been approved. It explains the fees and how to qualify for a Low Income Fee Reduction. The letter may also request missing information.
Letter 2272CAn IRS letter explaining why your request to pay the balance due in installments was declined.
Letter 2273CA confirmation letter of your request to pay the balance due in installments. It contained the amount to pay, fees charged, and where to send payment. Instructions on how to apply for the Low Income Fee Reduction included.
Letter 2318CA response to a request to pay taxes due to payroll deductions. It also explains the fees that are charged.
Letter 2357CThe IRS is admitting that it did not send you the balance due notices that it should have.
Letter 2603CThe IRS accepted your installment agreement. The IRS will file a Notice of Federal Tax Lien on your personal property.
Letter 2604CThe IRS has accepted your request for installment payments. This IRS letter provides the monthly payment, the address where to send it, and the fees charged. The letter also provides instructions on how to apply for the Low Income Fee Reduction.
Letter 2761CThe IRS is requesting your combat zone service dates to ensure that it provides you with the special provisions and protection of the combat zone deferment. Copies of military orders or other documentation to support your time served may be requested. Civilians working in support of the Armed Forces may be required to provide a Letter of Authorization or a letter from their employer.
Letter 2789CAn annual reminder notice, as required by law, of the balance due to the IRS. It explains that penalties and interest continue to accrue until the balance is fully paid.
Letter 2840CConfirms your Installment Agreement request and includes the payment amount and due date. This IRS letter explains the fees charged for paying monthly and explains how to apply for the Low Income Fee Reduction (if you qualify).
Letter 3030CProvides an explanation of the tax, penalty, and interest still due on your account.
Letter 3127CA confirmation of your request to make a change to your Installment Agreement. This IRS letter explains the fees for the change. Changes can be to the payment amount or due date, or it can include additional liabilities.
Letter 3174A reminder of taxes due after the IRS has sent a Notice of Intent to Levy.
Letter 3217CThe IRS has accepted your request to pay the balance in installments. This IRS letter provides your payment amount, the due date, and fees charged. The letter also provides instructions on applying for the Low Income Fee Reduction (if you qualify).
Letter 3228 (LT 39)A request to pay the balance due within 10 days using the envelope provided.
Letter 3500The IRS has received your documents, and it needs additional time to review them.
Letter 3572Your Federal Income Tax Return has been selected for examination. The IRS auditor requests that you call to schedule an audit appointment.
Letter 4883CThe IRS received your federal income tax return but needs more information to verify your identity in order to process your tax return accurately.
Letter 4903 (LT 26)You must file your tax returns immediately. The IRS has previously contacted you, but it did not receive a response.
Letter LP 47The IRS is trying to locate the person identified in the letter and is requesting that you provide their new address.
Letter LP 59The IRS has not received a response to the notice of levy it previously sent.
Audit Letter 2205The IRS manages audits either by mail or through an in-person interview to review your records. The interview may be at an IRS office (office audit) or the taxpayer’s home, place of business, or accountant’s office (field audit).
Letter 915You recently underwent an audit, and the IRS informs you that you now owe taxes.

Key takeaways

  • IRS Letter 6398C notifies you of a late payment penalty for additional taxes on excess retirement contributions.
  • Promptly addressing this letter can help you avoid further interest or penalties.
  • Monitoring retirement contributions can prevent excess amounts and related IRS penalties.
  • Seeking tax guidance ensures compliance with IRS contribution limits and helps avoid future issues with retirement accounts.
  • Responding to IRS notices and maintaining organized records can protect your retirement savings and ensure a smooth tax experience.

Share this post:

Table of Contents