CP88 Notice: Your Refund Is on Hold Until You File
By Forrest Baumhover, CFP®, EA · Last verified October 21, 2026
CP88 means the IRS is holding your refund because you have not filed one or more tax returns and it believes you may owe tax. File the missing return by the due date on the notice, and the hold ends once every required return is in and you owe nothing else.
If you got this letter
Got a CP88 in the Mail?
The IRS sent you a CP88 because it is holding your tax refund. It has no record of one or more of your tax returns, and it believes you may owe tax.
File the missing return by the due date printed on your notice. If the missing return is for one of the last two tax years, you may be able to file electronically through an e-file provider. For an earlier year, you mail the return to the address at the top of the notice.
The IRS releases your refund after it has every required return, or an explanation that you did not have to file, and you owe no other tax.
What the CP88 notice says
The IRS page for this notice opens with one sentence: “We’re holding your tax refund because you haven’t filed one or more tax returns, and we believe you may owe taxes.” Two facts sit in that sentence. A refund is on hold now, and the IRS believes you may owe tax.
The notice does not tell you the refund is gone. It tells you the refund waits until you fix the filing gap.
What to do
The IRS gives four steps. Read the notice carefully, then file your personal tax return by the due date on the notice. The IRS page lists no date of its own, so the date on your notice controls.
The filing route depends on the year. If the missing return is for one of the last two tax years, you may be able to file electronically through an e-file provider. If you are filing for an earlier year, you mail the return and any supporting documents to the address at the top of the notice.
Before you file, check your records against the years you think you filed. The IRS suggests you review your records to confirm you filed every past return. You can get copies of prior-year returns if you find a year you still need to file.
When the IRS releases your refund
The IRS answers this directly: it releases your refund after it has received all required tax returns, or an explanation that you were not required to file, and you do not owe any other taxes. Both conditions must hold, so one filed return does not release the refund while another required return is missing.
The IRS’s past-due-returns page describes the same rule. It says the IRS holds income tax refunds when its records show a past-due return, until it gets the return or accepts a reason for not filing.
If you cannot pay in full
The IRS says to file anyway and set up a payment plan if you cannot pay everything you owe. If you are due a refund, the IRS uses the refund to reduce the amount you owe.
The IRS’s late-filing collection page also lists an online payment agreement, an offer in compromise, and a temporary delay. The IA Payment Calculator sizes a payment plan before you apply for one.
The three-year refund limit
The IRS’s past-due-returns page warns about a separate clock. If a refund is due for withholding or estimated tax, you must file the return to claim it within 3 years of the return due date. The same rule applies to a right to claim credits such as the Earned Income Credit.
A CP88 on an old year therefore carries a second risk beyond the hold itself. If the missing return would show its own refund, you must file it within 3 years of its due date to claim that refund.
What people mistake the CP88 for
Some readers take a CP88 for a refund denial. The IRS page says the IRS is holding the refund, not cancelling it.
Others take it for the CP518, which asks for a missing return and warns that the unfiled return may delay a refund. The CP518 page covers that final reminder. The substitute for return notices page covers CP63, another notice about a refund held over an unfiled return.
Common Questions
What does a CP88 notice mean?
The IRS is holding your refund because you have not filed one or more tax returns, and it believes you may owe taxes.
What if I disagree with the notice?
If you already filed, do not have to file, or need to explain why you are filing late, write or call using the contact information on your notice. If you write, include your Social Security number, the tax year, and the form number you are writing about.
What if I filed recently?
The IRS page Understanding your CP88 notice says you do not have to do anything right now if you filed within the past eight weeks. If you filed more than eight weeks ago and the IRS has not processed the return, that page says to call the number on your notice.
How do I file the missing return?
For one of the last two tax years, you can file electronically or by mail. For an older year, you mail the return to the address at the top of the notice.
What if I cannot pay what I owe?
You can set up a payment plan. If you are due a refund, the IRS uses it to reduce the amount you owe.
When does the IRS release the refund?
After it receives all required returns, or an explanation that you did not have to file, and you do not owe any other taxes.