The timeline depends on how you file and whether the IRS finds issues

An amended return refund typically takes 8 to 12 weeks from the date the IRS receives your Form 1040-X (Amended U.S. Individual Income Tax Return). If you file by mail, add another 1 to 2 weeks for postal delivery before the clock starts. If the IRS needs to verify information or finds a discrepancy, the process can stretch to 16 weeks or longer.

The IRS does not process amended returns as quickly as original returns. They arrive at a separate processing center, get sorted by hand, and are reviewed more carefully because they involve changes to what you originally reported. This is why speed varies so much — a straightforward amended return moves faster than one that triggers additional questions.

You can check the status of your amended return using the IRS's "Where's My Amended Return?" tool on IRS.gov, but only after the IRS has received and begun processing it. This tool typically shows status updates 4 weeks after filing.

Key Takeaways

  • Amended returns take 8 to 12 weeks to process, starting from the date the IRS receives your Form 1040-X, not the date you mail or file it.
  • Mailed amended returns add 1 to 2 weeks of delivery time before processing begins, so filing electronically is faster if your tax software supports it.
  • The IRS will contact you by mail if they need more information or find an error, which can delay your refund by several additional weeks.
  • You cannot track your amended return status until the IRS has received it, which usually takes at least 4 weeks after filing.
  • If your amended return results in a refund, the IRS will deposit it to the bank account you listed on the return or mail a check if you did not provide account details.

Why amended returns take longer than original ones

The IRS processes amended returns separately from original returns, and they go through a more detailed review. When you file an original return, the IRS uses automated systems to scan and sort most of the work. Amended returns cannot be processed this way because they involve changes to your original filing, and the IRS needs to verify that the changes are correct and that they do not conflict with information already in their system.

Each amended return is handled by hand at one of the IRS's Amended Return Processing Centers. A person opens your envelope, checks that your Form 1040-X is filled out correctly, matches it to your original return in the system, and verifies that the math is right. If everything lines up, your return moves forward. If something does not match or looks unusual, your return gets flagged for additional review, which adds time.

The difference between mailing and electronic filing

If you mail your amended return, the first 1 to 2 weeks are spent in transit. The IRS cannot start processing until the envelope arrives at the Amended Return Processing Center. Once it arrives, the 8 to 12 week timeline begins.

Some tax software allows you to file an amended return electronically, which skips the mailing step entirely. Electronic filing goes directly into the IRS system, so processing can begin when ready. However, not all software supports e-filing for amended returns — you will need to check whether yours does before you file. If your software does not support it, mailing is your only option.

Even if you file electronically, the IRS still processes amended returns by hand and at the same pace as mailed returns. The speed advantage of electronic filing is only the 1 to 2 weeks you save on delivery time.

What happens if the IRS needs more information

If the IRS finds a discrepancy or cannot verify something on your amended return, they will send you a letter by mail asking for additional documents or an explanation. This letter will arrive 6 to 10 weeks after they receive your return. You will have 30 days from the date on the letter to respond.

Once you send the requested information back, the IRS will review it and make a decision. This second review typically takes another 4 to 8 weeks. If everything checks out, they will process your refund. If they still have questions, they may contact you again or make a decision based on what you have already provided.

The most common reasons the IRS requests more information are: income amounts that do not match what employers or banks reported to them, deductions that seem unusually large, or math errors on the amended return itself. Providing clear, organized documents the first time you respond helps speed up the second review.

When you will receive your refund

Once the IRS approves your amended return, they will send your refund within 2 to 4 weeks. If you provided a bank account number on your Form 1040-X, the IRS will deposit the money directly into that account. Direct deposit is faster than a mailed check — typically 3 to 5 business days after the IRS initiates the transfer.

If you did not provide bank account information on your amended return, the IRS will mail you a check. A mailed check takes 7 to 10 business days to arrive after the IRS sends it, and you will not know the exact mailing date in advance.

The IRS will not send you a separate notice telling you your refund has been approved. You will straightforward see the deposit appear in your bank account or receive the check in the mail. If you want to know the status before that happens, you can use the "Where's My Amended Return?" tool on IRS.gov after 4 weeks have passed since filing.

What to do if your refund is delayed beyond 12 weeks

If 12 weeks have passed since the IRS received your amended return and you have not received your refund or heard from the IRS, check the status using the "Where's My Amended Return?" tool first. This tool will tell you whether your return is still being processed, whether the IRS has sent you a letter, or whether there is a problem.

If the tool shows your return is still in process after 12 weeks, the IRS is likely reviewing it for accuracy or waiting for information from another agency. You can call the IRS at 1-800-829-1040 to ask about the status, though wait times are often long. Have your Social Security number, filing status, and the amount of the refund you are expecting ready when you call.

If the tool shows the IRS sent you a letter and you did not receive it, check your mail carefully — IRS letters sometimes arrive in batches or take longer than expected. If you are certain you did not receive a letter, call the IRS to ask what information they are requesting and how to send it.

Frequently Asked Questions

Can I speed up my amended return by calling the IRS?

No. The IRS processes amended returns in the order they are received, and calling does not move your return up in the queue. The only way to potentially speed things up is to make sure your Form 1040-X is filled out correctly and completely before you file, so the IRS does not need to contact you for more information.

What if I made a mistake on my amended return?

If you realize you made an error on your Form 1040-X after you have filed it, you can file another amended return to correct it. This is called a second amended return. It will go through the same 8 to 12 week process. The IRS will process the most recent amended return and ignore the earlier one.

Does the IRS charge a fee to process an amended return?

No. There is no fee to file an amended return, whether you mail it or file it electronically. The IRS processes it at no cost to you.

Will I get interest on my refund if it takes longer than 12 weeks?

Yes. If the IRS takes longer than 45 days to issue your refund after you file an amended return, they will add interest to the refund amount. The interest rate changes quarterly and is set by the IRS. The interest is calculated from the date you filed your amended return to the date the IRS issues the refund.

What if my amended return shows I owe money instead of getting a refund?

If your amended return results in additional tax owed, the IRS will send you a bill by mail. You will have time to pay, and the bill will include instructions on how to pay online, by phone, or by mail. Interest and penalties will explore if you do not pay by the due date shown on the bill.