Is a CP05 Letter Bad? Review Timeline, CP05A, and Refund Interest

Getting a CP05 letter is not bad news. It means the IRS has paused your refund while it verifies some of the numbers on your return, not that you are being audited or accused of anything. Most CP05 holds end with the refund released in full, and the notice itself tells you that you do not need to do anything unless the IRS sends a follow-up asking for documents.¹

What a CP05 Actually Is

A CP05 is a verification hold. The IRS sends it when it needs more time to confirm items on your return, such as income, withholding, tax credits, or business income, before it releases your refund.² The agency is cross-referencing what you reported against what your employers, banks, and other payers reported under your Social Security number or ITIN.

The hold works in your favor too. If the IRS released a refund based on mismatched information and later caught the error, you would owe the difference back. The CP05 review catches those mismatches before money moves.

CP05 vs. an Identity Verification Letter

A CP05 is not the same as an identity verification letter (the 5071C or CP5071 series). A CP05 means the IRS accepts that you filed the return but wants to verify the numbers, and no immediate action is required. An identity verification letter means the IRS is not yet sure you are the person who filed and needs you to confirm your identity before it processes anything.¹ If it is an identity letter, respond right away. If it is a CP05, you wait.

What the IRS Is Checking

The review focuses on the data points that determine your refund amount. The most common items:

Wages and federal withholding, matched against the W-2s your employer filed.
1099 income, including interest, dividends, and freelance payments.
Refundable credits like the Earned Income Tax Credit and Additional Child Tax Credit, which get extra scrutiny because they can produce refunds larger than the tax you owed.³
Self-employment income reported on Schedule C, along with related deductions.

Payments through third-party platforms like PayPal or Venmo can also come into play. Under changes enacted by the One, Big, Beautiful Bill, a Form 1099-K is only required when payments to you exceed $20,000 and transactions exceed 200 in a calendar year.⁴ A mismatch between a 1099-K you received and what you reported can trigger a CP05.

What to Do Right Now

For now, nothing. The notice tells you not to call the IRS and not to send documents unless specifically asked.¹ Calling will not speed the review up, and unsolicited paperwork can muddle your file.

A few things are still worth doing while you wait:

Pull together your W-2s, 1099s, pay stubs, and other supporting documents so you can respond quickly if the IRS follows up.
Compare the figures on your filed Form 1040 against your source documents. If you spot a real error, filing a Form 1040-X promptly can limit potential penalties and interest, though it may extend processing time.²
Track your refund on the IRS “Where’s My Refund?” tool or the IRS2Go app.¹

Before you act on anything, make sure the notice is real. A genuine CP05 arrives by mail, never email or text, shows a notice number in the upper right corner, and lists a toll-free IRS phone number. Verify by logging into your IRS online account or calling the number printed on the notice itself. Never call a number from a text or email.

How Long the Hold Lasts

The CP05 states the review could take up to 60 days from the date on the notice.⁵ During that time the IRS runs automated and manual comparisons between your return and third-party filings. If everything lines up, the refund is released.

If 60 days pass with no refund and no further letter, call the toll-free number on your notice.² The review can run longer when the IRS is still waiting on third-party information or when a return involves complex income sources, and you may receive additional correspondence explaining the delay.

Even after verification finishes, it can take up to 16 weeks for the refund to actually arrive or be applied to next year’s estimated taxes.² The 60-day window covers verification, not the full delivery timeline.

If a CP05A Follow-Up Arrives

If the IRS cannot verify your information from its own records, it sends a CP05A asking you for supporting documents. This is a separate letter, not a duplicate of the first one, and it means the IRS needs your help to finish the review.⁶

The CP05A usually asks you to prove income and withholding by sending items such as:

At least three pay stubs, including your end-of-year stub. The IRS does not want a copy of your W-2 for this purpose.
A letter on company letterhead confirming your employment, with the employer’s name, address, and phone number.
For pension or retirement income, a statement of benefits from the paying institution.

Include a copy of the CP05A notice itself with your response, and get it in by the deadline printed on the letter.⁶ You can respond by mail or through the IRS Document Upload Tool referenced in the letter.

How the Review Can End

The verification ends one of three ways:

The IRS confirms everything, lifts the hold, and sends your refund by the method you chose at filing.
The IRS finds a discrepancy and adjusts your refund amount, then sends a notice explaining the change.
In rare cases, the hold escalates into a more detailed examination of specific items.

If the IRS adjusts your refund and you disagree, you have the right to an independent review through the IRS Office of Appeals, and beyond that, the U.S. Tax Court or other federal courts.

Interest the IRS Owes You for the Delay

A hold can push your refund back by weeks or months, but federal law requires the IRS to pay you interest once the wait crosses a threshold. Under 26 U.S.C. § 6611, the IRS has 45 days after your filing deadline (or after you file, if you file late) to issue the refund without owing interest. Past that, interest accrues from your original filing deadline.⁷

The rate changes quarterly. For the first quarter of 2026, the individual overpayment rate is 7% per year, compounded daily.⁸ For the second quarter (April through June 2026), it drops to 6%. You do not have to request the interest. The IRS calculates and adds it automatically when it releases your refund.

If the Delay Is Causing Real Hardship

If waiting on your refund means you cannot pay rent, cover utilities, buy food, or keep the transportation you need for work, you may qualify for expedited help through the Taxpayer Advocate Service, an independent organization within the IRS that can step in when normal processes are causing significant hardship.⁹

p>To ask for help, submit IRS Form 911 (Request for Taxpayer Advocate Service Assistance). You can email it to TAS.Form.911.Request.for.Assistance@irs.gov, fax it to (855) 828-2723, or mail it to the address listed on the form.¹⁰ Email submissions are not encrypted, so TAS will follow up by phone or letter. If you do not hear back within 30 days, contact the Taxpayer Advocate office where you originally sent the request. TAS expects you to have tried normal IRS channels first; the service is meant for situations where those channels have failed or where waiting would cause serious harm.

1
Internal Revenue Service. Understanding Your CP05 Notice
2
Taxpayer Advocate Service. Notice CP05
3
Internal Revenue Service. Letter or Audit for EITC
4
Internal Revenue Service. IRS Issues FAQs on Form 1099-K Threshold Under the One, Big, Beautiful Bill
5
Internal Revenue Service. Notice CP05
6
Internal Revenue Service. Understanding Your CP05A Notice
7
Office of the Law Revision Counsel. 26 U.S. Code 6611 – Interest on Overpayments
8
Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026
9
eCFR. 26 CFR 301.7811-1 – Taxpayer Assistance Orders
10
Taxpayer Advocate Service. Submit a Request for Assistance