What a CP05 letter means for your refund timeline

A CP05 letter means the IRS has received your tax return and is processing it, but they need more time before they can send your refund. The letter tells you they are reviewing your return for accuracy or completeness. You are not being audited — the IRS simply found something that requires verification before they release the money.

The refund itself typically arrives 4 to 12 weeks after the date on your CP05 letter, though the exact timing depends on what the IRS is checking and whether they need information from you. If the letter asks you to send documents or take action, the clock does not start until they receive what you send.

The CP05 is one of the most common notices the IRS sends. It does not mean you made an error — it usually means the IRS wants to confirm something before processing, such as a large deduction, a dependent claim, or income reported on your return that does not match what employers or banks reported to them.

Key Takeaways

  • A CP05 letter pauses your refund while the IRS verifies information on your return, typically adding 4 to 12 weeks to the normal processing time.
  • If the letter asks you to send documents or respond by a certain date, you must do so or the IRS may deny your refund and issue a bill instead.
  • You can check the status of your refund using the IRS Where's My Refund tool, which updates every 24 hours and will show when the IRS has finished reviewing.
  • If you do not respond to a CP05 that requires action, the IRS will disallow the items in question and recalculate your refund downward or send you a bill.
  • The CP05 does not mean you are under audit — it is a routine verification notice that affects millions of returns each year.

What the IRS is checking when they send a CP05

The IRS sends a CP05 when their computer systems flag something on your return that does not match third-party records or IRS rules. Common reasons include a dependent you claimed who did not appear on prior years' returns, a large charitable deduction relative to your income, business losses that offset most of your income, or income reported by an employer or bank that differs from what you reported.

The letter will usually tell you what they are reviewing. Read it carefully. If it says "we are verifying the following items" and lists specific deductions or credits, that is what they are checking. If it simply says they are reviewing your return and will contact you if they need more information, they may not need anything from you at all — they may just need time to cross-check records.

The CP05 is not an audit notice. An audit notice is called a CP05A or comes with a formal examination letter. A CP05 is a verification hold, which is faster and less intrusive. The IRS processes millions of these each year as part of normal return processing.

Whether you need to respond and what happens if you do not

Read the entire CP05 letter to see if it asks you to send documents or take action. Some CP05 letters are informational only — they tell you the IRS is reviewing your return and will contact you only if they need something. Others ask you to send specific documents by a specific date, such as receipts for charitable donations or proof of a dependent's Social Security number.

If the letter asks you to respond, the deadline is usually 30 days from the date on the letter. You must meet this deadline. If you do not respond, the IRS will disallow the items they were reviewing. That means your refund will be recalculated without those deductions or credits, which may result in a smaller refund or a bill you owe.

If you cannot find the documents the IRS asks for, write back and explain what happened. Include copies of anything you do have. The IRS will consider your response, though they may still disallow part of the claim if you cannot provide proof.

How to track your refund status during CP05 processing

The IRS Where's My Refund tool is the most reliable way to check status. Go to irs.gov, find the Where's My Refund section, and enter your Social Security number, filing status, and the exact refund amount from your return. The tool updates once every 24 hours and will show you whether the IRS is still reviewing your return or has finished processing.

The tool will display one of three messages: "We received your return and it is being processed," "We are still processing your return," or "Your refund has been approved and will be sent on [date]." If you see the third message, your refund is on its way. The date shown is when the IRS will release the money, not when it will arrive in your bank account.

Do not call the IRS during the CP05 review unless the letter specifically tells you to. Calling will not speed up the process. If the letter includes a phone number or says to call with questions, that is the only time you should reach out. Otherwise, wait for the IRS to contact you or check Where's My Refund every few days.

How long between IRS approval and money in your account

Once the IRS approves your refund and the Where's My Refund tool shows an approval date, the money usually arrives within 5 to 7 business days if you chose direct deposit. If you chose a paper check, allow 7 to 10 business days from the approval date, though delivery can take longer depending on mail speed in your area.

The approval date shown in Where's My Refund is when the IRS releases the refund to the bank or postal service, not when it hits your account. Banks process direct deposits overnight or within one business day, so if the IRS releases your refund on a Friday, you may not see it until Monday or Tuesday.

If you chose a paper check and it does not arrive within 10 business days of the approval date, check Where's My Refund again to confirm the address the IRS has on file. If the address is wrong, you may need to contact the IRS or wait for the check to be returned so you can request a replacement.

What to do if your refund does not arrive on time

If the Where's My Refund tool shows your refund was approved more than 7 business days ago and you chose direct deposit, or more than 10 business days ago and you chose a check, contact your bank first. Ask them to search for the deposit using your routing number and account number. Sometimes deposits are delayed or routed to the wrong account by mistake.

If your bank has no record of the deposit, go back to Where's My Refund and take a screenshot showing the approval date. Then call the IRS at 1-800-829-1040. Have your Social Security number, filing status, and refund amount ready. The IRS can tell you whether the refund was actually sent and, if so, where it went.

If you chose a paper check and it has been more than 10 business days, the check may have been lost or sent to an old address. The IRS can issue a replacement check, but you will need to request it. Call 1-800-829-1040 or file Form 3911, Application for Taxpayer Assistance Order, if you believe there was an error in processing.

Differences between CP05 and other common IRS notices

The CP05 is a verification notice, not an audit. A CP05A is a formal examination notice and means you are being audited. An audit takes much longer — usually 3 to 6 months or more — and requires you to provide detailed documentation. A CP05 typically takes 4 to 12 weeks and usually requires only a few documents or a simple response.

A CP12 is a notice that the IRS made a change to your return and is sending you a refund or bill reflecting that change. It is not a hold on processing — it is a final decision. A CP05 is a hold while they verify, and a CP12 comes after they have finished verifying.

If you receive a CP05 and later receive a CP12, that means the IRS finished their review and made a decision. The CP12 will tell you whether your refund is being sent, reduced, or if you owe money instead. Do not ignore a CP12 — it is a final notice and you should act on it if it asks for payment.

Frequently Asked Questions

Can I still use my refund while the CP05 is being processed?

No. The IRS is holding your refund while they verify your return. You cannot access the money until they finish reviewing and approve it. If you need cash urgently, you will have to find another source. Once the refund is approved, it will be released to you.

Does a CP05 mean I made a mistake on my taxes?

Not necessarily. A CP05 means the IRS wants to verify something before processing, but that does not mean you made an error. It could be a mismatch in records, a new claim the IRS has not seen from you before, or simply a routine check. Many people receive CP05 letters and their refunds are approved without any changes.

What if I lost the CP05 letter and do not know what they are asking for?

Call the IRS at 1-800-829-1040 with your Social Security number and tax year ready. They can tell you what the CP05 was about and whether you still need to respond. If the deadline has passed, explain that you lost the letter and ask what you should do. The IRS may give you additional time or may ask you to submit documents now.

Will the CP05 delay affect my state refund too?

Usually not. Your state refund is processed separately from your federal refund. However, some states use federal information to process their returns, so if the IRS is holding your federal return, your state may also delay processing until the federal review is complete. Check your state tax agency's website or call them to ask about your state refund status.

How do I know if the IRS finished reviewing my CP05?

Check the Where's My Refund tool every few days. When the IRS finishes their review, the tool will update to show either an approval date or a notice that changes were made to your return. You may also receive a CP12 letter in the mail explaining what they found. The tool is the fastest way to know — do not wait for mail.