In the perspective of Advocate Shahid (Tax Compliance and Advisory Specialist). The IRS Letter 4464C is a notice that the IRS has received your tax return, but is withholding the refund while they are checking the income, withholding or credits to ensure accuracy. Usually, the review will take 60-120 days and no action will be required of you unless they send a follow-up request.
What the 4464C Process Looks Like
The Hold
Your return is placed in the Return Review Program where your W-2s, 1099s and credits will be automatically verified against the information provided by your employers or financial institutions.
No Action Needed
The letter clearly indicates that you do not have to contact the IRS or submit a document until you get a follow-up letter (including an audit notice or request for missing documents).
Wait Time
The IRS should take 60 to 180 days to review the discrepancy (depending on the complexity of the discrepancy).
Most Important Steps You Should Take
Save Records
Have copies of your tax return, W-2s, 1099s, or any other records you use to claim deductions or credits available in case the IRS requests supporting records later.
Watch Your Status
IRS phone representatives are not able to speed up the automated review. Rather, check your refund status with IRS Where’s My Refund?
View notices, account transcripts, or any pending codes (e.g., “Code 571” – freeze release) on IRS Online Account:
Sign in to your IRS Account to get specific information about any notices you might have received or to see account information, or any pending codes that indicate that your return is moving (e.g., “Code 571” – freeze release).
If you’ve not gotten your refund nor feedback from the IRS after 120 days, visit the Taxpayer Advocate Service.
What Is IRS Letter 4464C?
IRS Letter 4464C is a letter sent by the IRS to inform the taxpayer that IRS requires more time to review information on the return to determine that the return is correct before issuing a refund. This IRS notice or letter is often related to an IRS questionable refund hold, whereby the IRS temporarily withholds the refund due to an examination of some aspects of the return. The IRS is going a bit further than just verifying standard refunds; in most cases, it was simply for the IRS to verify that the taxpayer was not committing fraud.
When reviewing the tax return refund, the IRS will compare the taxpayer’s income and withholding information with that provided by the employer on the W-2, other Form 1099s, tax credits, self-employment income and other financial statements submitted to the IRS. If there are discrepancies or they don’t have enough information, the IRS may send an IRS refund delay letter until they have reviewed it.
Real-Life Example
Maria filed her federal tax return in February and she was looking for her refund to be directly deposited in her bank account within 3 weeks. But, the “Where’s My Refund” tool still indicated that her refund was being processed. She was sent letter 4464C from IRS a few days later. Her earnings on her return were W-2 wages and federal withholding taxes and the Earned Income Tax Credit (EITC). The IRS didn’t refuse her return or the refund, but noted that the refund would be held while it was doing further verification checks.
Most refunds are issued within 21 days, but for most cases, income, withholding and refundable credits are reviewed – resulting in refunds that may take much longer.
Why Did I Get IRS Letter 4464C?
IRS issues Letter 4464C if there is something that needs to be reviewed further before your tax return can be accepted for tax refund. Many times, the problem is one of verification checks and not a major tax problem. The IRS has computer programs that match the data on your return with the data they receive from your employer, bank or other third parties.
Income Mismatch
A frequent cause of an income mismatch refund review from IRS may be that the income you reported on your tax return does not match what you employer or payer reported to them. IRS could reconcile your income with the income reported by your employer (on Forms W-2 or 1099). The IRS could start an IRS third party income verification review prior to issuing your refund if a document is missing or delayed, or if it doesn’t list the same number of amounts. Sometimes, an IRS W-2 verification delay or IRS 1099 income review is only due to corrected forms being filed by employers after you filed.
Withholding Mismatch
The IRS also can check to see if the amount of federal income tax you claimed on your tax return is consistent with what is in the IRS’s records. When an IRS review is conducted on withholding, the agency reviews the withholding amounts that are reported on Forms W-2 and 1099, against the amounts that appear on your return. A mismatch between the IRS and an employer’s payroll can happen if there is an error in the withholding or if a form was not filed or if the employer’s payroll system has not yet been updated to the IRS system. IRS might temporarily retain the refund until it reviews withholding reported on the returns data, and matches the data on the W-2s with the data on the returns.
Tax Credit Review
Refundable tax credits are more closely analyzed as they have the potential to greatly boost the amount of a refund. The IRS could do a tax credit review if you took the earned income tax credit, an additional child tax credit or any other refundable tax benefit. The IRS earned income credit review process can include one or more of the following: income level, dependent information, filing status or qualifying child requirements. In certain cases, the IRS takes a long period of time to determine if the taxpayer is eligible for the claimed child tax credit, resulting in a delay to receiving their refund. In some cases, taxpayers may have a child tax credit delay because the IRS has to confirm that they’re eligible for the credits.
Identify Verification / Fraud Prevention
At times, the Letter 4464C is linked to identity verification or fraud prevention for refunds. The IRS is closely watching for returns with evidence of identity theft, stolen Social Security numbers or for returns filed by someone other than the taxpayer. Anything unusual will be picked up by the system and the return may be flagged for an IRS suspicious refund hold. The agency then could conduct IRS return integrity checks via a department called Return Integrity Verification Operations (RIVO). There are two purposes for these reviews: One is to safeguard the interests of taxpayers and the other is to prevent the payment of fraudulent refunds.
Does IRS Letter 4464C Mean You Did Something Wrong?
No IRS Letter 4464C is a sign of a mistake, fraud or audit. By now you may be wondering, “Is IRS Letter 4464C an audit?” The answer is no, unless they have specific questions about you and your return. For the most part, the IRS reviewing my tax return status only indicates that they need more time to confirm income, withholding, expenses or any refundable credits before paying the refund.
Refer to similar notices for refunds issued by the IRS, such as a CP05 letter, to find out that some returns are filed to verify that the information on them is reported accurately. This process is not to indicate that the taxpayer was delinquent or that he/she intentionally submitted incorrect information.
If you see the IRS saying “IRS refund under review no action needed” or ask “IRS says refund is under review what does it mean,” it most likely means that the IRS is conducting regular verification procedures. A large number of refunds are issued after the review and records are matched with IRS records.
How Long Does IRS Letter 4464C Refund Review Take?
In numerous situations, an IRS refund could be reviewed for a period of 60 days, but some may drag on for 120 days or as long as 180 days depending on the nature of the IRS verification. The IRS may send a second notice/letter if additional information is requested prior to the refund being issued.
The IRS refund review time frames depend on the income verification, withholding checks, refundable credits, and identity verification reviews. Those who have received IRS Letter 4464C may be wondering, “how long does IRS Letter 4464C take?” It is important to note that IRS manual review refunds may take longer than electronic processing.
Typical IRS 4464C review periods include IRS refund review 60 days, IRS refund review 120 days and IRS refund review 180 days, in more complicated matters. The delays can occur if IRS still has not received data from the employers on the W-2 or has not received the Form 1099 or other missing information necessary for Return Integrity Verification Operations (RIVO). There is no guarantee that a delay in the IRS processing of a refund means that there is a problem with the return.
| Timeframe | What It Usually Means | What the Taxpayer Should Do |
|---|---|---|
| First 21 days | Normal refund window for many e-filed returns | Check “Where’s My Refund” |
| After Letter 4464C | Refund is under review | Review W-2, 1099, credits, withholding |
| 60 days | IRS may still be verifying income or credits | Contact IRS only if no refund or letter |
| 120 days | Some unresolved RIVO cases may need referral | Ask IRS about unresolved review status |
| Up to 180 days | Some refund reviews can take longer | Consider TAS if hardship exists |
What Happens After IRS Letter 4464C?
IRS Letter 4464C is followed by a continued verification process for the IRS to go over income, withholding, credit and other return information. Depending on what the IRS discovers in the IRS tax return review steps, the next step is at the discretion of the IRS.
The IRS Releases Your Refund
If the IRS verifies your wages, withholding and tax credits are the same as the official records, the refund hold might be lifted and you could receive your Federal refund. After going through the IRS refund hold process, many taxpayers don’t have to do anything else to get their refunds.
The IRS Sends Another Notice
Others get a second IRS notice/letter after Letter 4464C. Typical follow up notices are the CP05 notice, CP05A notice, Letter 2645C or Letter 2644C. The notices typically indicate that IRS needs additional time to confirm refund data or it is still pending additional review.
The IRS Requests More Information
If the records don’t match, the IRS might ask for evidence of wages, withholding, identity, tax credits or business expenses. The taxpayer might be required to provide supporting documents prior to moving forward with the review.
The IRS Adjusts the Refund
If the IRS sees any inaccuracies during the process, it can either decrease the refund or increase it before issuing the final refund.
Step-by-Step Solution After Receiving IRS Letter 4464C
Step 1 — Read the Letter Carefully
The initial step to take when getting IRS Letter 4464C is to take time to review the notice. Review the tax year, notice date, tax refund amount, IRS phone number and if notice requires action or if you just have to wait during the review period.
Step 2 — Do Not Panic or File a Duplicate Return
Don’t file a duplicate tax return. Duplicate returns can also cause further IRS processing delays, and could even prolong the review of your refund even further.
Step 3 — Check Where’s My Refund and IRS2Go
Track your refunds with Where’s My Refund or IRS2Go app. Typically, the IRS updates the status of taxpayers’ refunds within 24 hours after they e-file. If your IRS refund is still being processed, then keep an eye on it periodically.
Step 4 — Check Your IRS Transcript
Check your IRS transcript for wage and income information, withholding and activity in your accounts. Transcripts are often used to verify tax information with 4464C and wage verification information by many taxpayers.
Step 5 — Compare Your Return With Forms W-2 and 1099
Thoroughly check income on tax return records. Match W-2 wages with tax return wages, ensure that federal withholding is correct with box 2 of W-2, review Form 1099 income, business income and credit eligibility statements. Only if you discover a mistake, correct tax return after getting a letter from the IRS.
Step 6 — File Form 1040-X Only If You Find a Real Error
If you find that the information on the tax return is inaccurate for income, file a tax return amendment (Form 1040-X), and enclose supporting documents.
Step 7 — Contact the IRS After the Waiting Period
If there is no response time indicated on the notice, wait until the time that appears on the notice is up. Generally, if a taxpayer has received a letter from the IRS stating “You’ve been identified as having a potential claim for a tax refund. Your status hasn’t been confirmed yet. Please call IRS after 4464C letter,” he or she should not initiate a tax refund review until after the waiting period has elapsed.
Step 8 — Contact the Taxpayer Advocate Service If You Have Hardship
If this delay causes undue financial hardship, call the Taxpayer Advocate Service to get IRS refund hardship assistance. TAS might be able to help eligible taxpayers if their refund is a crisis.
Real-Life Case Studies and Practical Examples
Case Study 1 — W-2 Withholding Mismatch
A taxpayer reported $8,000 of federal withholding on his tax returns, but the Form W-2 he received from the employer reporting to the IRS listed $800 of federal withholding. The mismatch between the IRS withholding and what was claimed on the return caused the tax refund process to be reviewed as the withholding claimed on the return was significantly more than the IRS withholding.
Solution: If the W-2 is incorrect, compare box 2 with the tax return and if the taxpayer made the mistake, amend the tax return.
Case Study 2 — Missing Form 1099 Income
A freelancer reported income on Form 1099-NEC, but missed it out of his early reporting. Later, the IRS got the form from the payer, resulting in an IRS 1099 income review.
Case Study 3 — Earned Income Tax Credit Review
For each of the three cases below, write a brief answer to the question. Answer the questions briefly for each of the three cases below.
The parent claimed the earned income tax credit and extra child tax credit. The IRS has held up refunds as they go through the eligibility and accuracy of refundable credits process.
Case Study 4 — Identity Theft Concern
A taxpayer was not sent a letter 4464C if he did not file a tax return. This could be a sign of identity theft.
Solution: Adhere to IRS identity theft procedures and complete Form 14039, if necessary.
Real Case Law to Mention in the Article
United States v. Dalm, 494 U.S. 596 (1990)
The Supreme Court, in United States v. Dalm, provided guidelines of procedures that taxpayers must adhere to in order to secure a refund. The Court ruled that administrative refund claims must be filed properly, and within the time limits in the statute, before a claim for a refund can be filed.
United States v. Brockamp, 519 U.S. 347 (1997)
The Supreme Court, in the case of United States v. Brockamp, held that the limitation periods of IRC § 6511 are strict and generally do not permit the use of ordinary equitable tolling to extend the period for filing the claim for a tax refund. This case is a reminder that it is important to address tax refund problems promptly.
United States v. Clintwood Elkhorn Mining Co., 553 U.S. 1 (2008)
In the United States v. Clintwood Elkhorn Mining Co., the Court ruled that a taxpayer cannot sue the government for refund if he or she has not followed the IRS refund claim procedure.
IRS Letter 4464C is typically an administrative letter to review refunds, but there’s a strict refund law. The Supreme Court decisions Dalm, Brockamp and Clintwood Elkhorn demonstrate the importance of keeping records, responding to IRS notices promptly, filing amended or refund claims in a timely fashion, and filing them accurately.
Common Problems Taxpayers Face During a 4464C Refund Review
Refund Still Processing With No Clear Update
The IRS informs hundreds of thousands of taxpayers that their refunds are still being processed for weeks without providing any more details. When the IRS delays the refund, it is likely that it is still processing W-2 wages, withholding or Form 1099 records.
No Action Needed But Refund Still Delayed
Delays occur for some taxpayers who get IRS Letter 4464C (no action needed) instructions. If the IRS refund you’re reviewing shows as no action needed, it means the IRS is likely still performing internal verification actions before it will issue the refund.
Employer Has Not Sent Correct W-2
If employer income not reported to IRS records is not in sync with taxpayer’s return, this can cause a delay in receiving the W-2 from the IRS. If the payroll reporting is wrong, W-2s are late or corrected W-2s are submitted, this could cause delays in the review.
Taxpayer Claimed the Wrong Credit
In addition, there may be delays in receiving a refund in the event of an IRS tax credit review of refundable tax credits like the earned income tax credit or additional child tax credit. Errors or incorrect dependent data can cause further evaluation.
Taxpayer Filed Too Early With Incomplete Documents
In some cases, it’s possible to have mismatches in income reported on Forms W-2 or 1099 when the IRS receives income that’s not reported on the filed income tax return. There can be mismatches or delays in refunds filed due to income not reported on the filed income tax return which are later reported to the IRS.
Mistakes to Avoid After Receiving IRS Letter 4464C
When your tax return is reviewed, it means that it was chosen for a different type of review, such as IRS refund fraud or IRS tax verification. When a selected tax return is given “refund hold” status, common errors can result in additional delays throughout the IRS refund fraud or IRS tax verification process.
- Never ignore a second IRS notice for the IRS to review documents and/or additional information.
- Avoid duplicate filing returns; duplicate filing could cause significant delays in processing.
- Amended return after 4464C is not allowed unless there is an error made on the original return.
- Don’t call the IRS again before the time period of the notice has elapsed.
- Be aware that receipt of Letter 4464C does not imply that you are under audit or accused of fraud.
- Never trust totals from tax software – compare carefully all the source documents.
- Don’t overlook forms of income such as Form 1099 income, freelance income or side business income.
- Avoid claiming refundable tax credits that you are not eligible for, and don’t include supporting documentation if you are not.
- Refund fraud by adjusting the amount of withholding or income on tax paperwork to boost the amount in a refund is a serious IRS review of a refund fraud and should be avoided.
- If the IRS has issued a letter to the taxpayer stating that a wage verification, proof of identity or other records are required to correct the tax return, then do not miss the IRS’ deadlines.
Documents to Review Before Calling the IRS
Before calling the IRS about a refund delay, make sure to have all of the essential IRS refund review documents handy to verify income, withholding, tax credits and identity information in a timely manner. Confidence in records can aid in promptly resolving refund-review problems.
| Document | Why It Matters |
|---|---|
| IRS Letter 4464C | Shows the notice date, review instructions, and waiting period |
| Form W-2 | Confirms wages and income tax withholding reported by employers |
| Form 1099-NEC / 1099-MISC / 1099-INT | Verifies third-party income reported to the IRS |
| Tax return copy | Helps compare reported income, withholding, and tax credits |
| IRS transcript | Shows IRS account activity, wage records, and return-processing details |
| Credit documents | Supports eligibility for tax credits such as EITC or ACTC |
| Identity documents | Useful if the IRS requests identity verification during the review |
Review Form W-2 and Form 1099 information carefully with the information you’ve included on your return before contacting the IRS. There are numerous reasons for the delays in getting a refund, but the most common is a mismatch between income, withholding and refundable credit data as reported to the IRS.
When Should You Contact the IRS or Taxpayer Advocate Service?
If you haven’t yet had your refund, an updated status notice, or other IRS notice, and the waiting period in Letter 4464C has elapsed, you should contact IRS regarding any refund review problems. Those who are wondering about “how long after 4464 letter will I receive my refund” should be aware that the process of reviewing the refund can take several weeks to verify wages, withholding, tax credit information or income.
IRS refund reviews can be conducted on wages, withholding, credits and expenses, and may take anywhere of 45 to 180 days, depending on the complexity of the refund review. If not, the IRS has provided other services that might need your help.
If you are experiencing issues with your refund being delayed and it is having a significant financial impact on you (e.g., risk of eviction, utilities being turned off, medical needs, or not being able to pay bills), you should reach out to Taxpayer Advocate. To help taxpayers that are in a state of hardship with their IRS refunds, TAS can help them in certain situations and to speed up the process in continued refund review cases.
What I Usually Check First When a Client Receives IRS Letter 4464C
The first thing I look for when I review an IRS income verification letter such as Letter 4464C is if the taxpayer’s wages, income tax withholding and the refundable credits are consistent with what I’m sure the IRS is receiving from the taxpayer’s employers/payers. Many times, it is not a fraud or an audit that is the issue with regards to refund verification. Rather, IRS review of income and withholding will more likely result in an IRS timing or matching error—such as income by the employer reported in the year that it was not yet entered into IRS systems, income reported from a missing Form 1099, or withholding amounts that are not in agreement with the employer’s Form W-2 records.
I also compare the third party records with the return filed with the IRS, including reviewing wage verification data, IRS transcripts, etc. In most cases, the refund delay is alleviated by correcting the mismatch or waiting for the employers’ filings to be corrected.
Final Answer: What Should You Do After IRS Letter 4464C?
Don’t worry if you are receiving IRS Letter 4464C. If you have a notice from the IRS, read it carefully and make sure that the IRS asked you to do anything. Then, check your refund status via “Where’s My Refund” or the IRS2Go app, review all Forms W-2 and 1099, match your income and income tax withholding with your tax return and look at your IRS transcript to verify wage and account information.
The IRS refund review process is usually just a confirmation of income, withholding, refundable credits, and/or employer-reported wages. Unless IRS specifically asks for documents or additional information, most taxpayers should wait the time indicated above for the IRS to review the case.
If you find an actual error, like an incorrect income, withholding or missing Form 1099, then you should file Form 1040-X to amend the return. Of course, don’t edit the return unless you can verify that there is a mistake in it.
If the delay in the refunds causes undue hardship, speak with the Taxpayer Advocate Service to get help to move the refund review to a faster conclusion.
FAQs About IRS Letter 4464C Refund Review Process
What does IRS Letter 4464C mean?
IRS Letter 4464C indicates that your tax return is in a “refund review” status before IRS issues your federal tax refund. It is usually associated with the verification of income, check withholding, refundable tax credits or other procedures to verify refunds.
Why did the IRS send me Letter 4464C?
Your Letter 4464C may be issued by the IRS when they require additional time to verify the information on your income tax return, such as business income, income tax withholding, income and tax credits.
Does Letter 4464C mean my refund is denied?
Your refund won’t be denied if you receive No. Letter 4464C. It indicates that the IRS is looking over the return before determining if the refund will be issued, adjusted or further information will be sought.
How long does IRS Letter 4464C refund review take?
The time frame may be as long as 60 days, or it could be 120 days or even 180 days depending on the case and if further verification is needed.
Do I need to respond to IRS Letter 4464C?
Typically, there is no action that must be taken unless the IRS asks for documentation, identification or action in the future. Never complete any tasks that are not outlined in the notice.
Should I call the IRS after receiving Letter 4464C?
Please refrain from calling during the review period as most taxpayers should wait this period. If you’ve waited and still haven’t received your refund (or any other notice) contact the IRS.
Can I file an amended return after IRS Letter 4464C?
Yes but if there is a genuine error on your return. If an error occurs with regard to income, withholding, filing status, credits, or other information, then taxpayers should use Form 1040-X to correct their errors to the Internal Revenue Service.
Can the Taxpayer Advocate Service help with a 4464C refund delay?
Yes. The Taxpayer Advocate Service is available to assist if the IRS delays refunds are creating hardship or if the IRS’ standard procedures are not working.