U.S. · IRS notices
IRS CP16 notice explained.
A notice that the IRS corrected your return and applied all or part of your refund to other tax debts.
CP16 says the IRS corrected one or more mistakes on your tax return and, because you or your spouse owe other tax debts, applied all or part of your refund to pay off those debts. The IRS page says no response is needed if you agree; if you disagree, contact the IRS at the number on the notice by the date indicated.
Compare IRS CP notices
Result
CP notices at a glance
| Notice | What the IRS page says it is | Response, as the IRS page states it |
|---|---|---|
| CP2000 | The income or payment information the IRS received from third parties, such as employers or financial institutions, does not match what was reported on the tax return. | Reply to the notice by the date listed on it. The IRS says the notice is not a bill and a response may be required. |
| CP13 | The IRS corrected one or more mistakes on the return. The taxpayer is not due a refund and does not owe an additional amount because of the changes; the account balance is zero. | No response if you agree. If you disagree, contact the IRS at the number on the notice by the date indicated. |
| CP16 | The IRS corrected one or more mistakes on the return. Because the taxpayer or spouse owe other tax debts, the IRS applied all or part of the refund to pay off those debts. | No response if you agree. If you disagree, contact the IRS at the number on the notice by the date indicated. |
| CP103 | The IRS made changes to the return because it found a miscalculation, and the balance due changed as a result. | Contact the IRS within 60 days of the date of the notice if you disagree. Pay by the date on the payment coupon. |
| CP107 | The IRS made changes to the return because it found a miscalculation, and the balance due changed as a result. | Contact the IRS within 60 days of the date of the notice if you disagree. Pay by the payment due date on the notice. |
| CP108 | The IRS received a payment but could not determine the correct form or tax year to apply it to. | No response if the payment was applied correctly. If not, tell the IRS where to apply it, by phone or Form 15108. |
| CP133 | The IRS made changes to the return because it believes there is a miscalculation, and as a result there is an overpayment on the account. | Contact the IRS within 10 days of the date of the notice if you disagree, by phone or by mailing the completed contact stub. |
| CP136 | The employer’s deposit requirement for Form 941 filings next year may differ from last year’s, based on the total tax reported on the Forms 941 for the four previous consecutive quarterly periods (the lookback period). | The IRS page prints no response date. It says to check your records against the notice and, if a Form 941 is missing, to file it as soon as possible. |
| CP152 (IRS page) | The IRS received the tax-exempt bond form. | No action needed; keep the notice for your records. |
| CP153 | The IRS cannot provide the refund through direct deposit and is sending the refund or credit payment by mail. | No response is requested. Expect the refund within 3-4 weeks of the notice date; contact the IRS if it has not arrived after 4 weeks. |
| CP2005 | The IRS accepted the information sent, will not change the return, and has closed its review. | No response is required. |
The notice number is printed on the notice itself, usually in the top right corner. Use the number exactly as printed; the table follows the IRS page for each number.
What the IRS says the notice is
“We corrected one or more mistakes on your tax return. Because you or your spouse owe other tax debts, we applied all or part of your refund to pay off those debts.” Read the notice to see what was changed and how it affected the refund.
If you agree
The IRS page says no response is required. If you are due a refund, it says you should receive a refund check in 4-6 weeks. You may correct your copy of the return for your records but should not send it to the IRS.
If you disagree
Contact the IRS at the number shown on the notice by the date indicated. For a disagreement about the debt the refund was applied to, the FAQ says to contact the IRS at the number in the “Where to find more information” section of the notice. The reversal and Tax Court language is the same as on CP13: the IRS says it will reverse most changes that increased the amount owed or that cut a requested refund, that unsupported cases may be forwarded to audit with contact within 6 weeks, and that missing the date means losing formal reversal and U.S. Tax Court appeal rights, although later information will still be considered.
Injured or innocent spouse
If some or all of the refund was applied to a spouse’s tax debts, the page says you may be eligible for innocent or injured spouse relief and points to Form 8379, Injured Spouse Allocation.
Remaining balances
The IRS page says that if you still owe a balance for another tax year, it will continue to apply refunds to that balance until it is paid, even if you have a payment plan. It suggests signing in to Online Account to see outstanding balances, paying in full to avoid additional interest and penalties, or making arrangements to pay over time. A further correction to the return needs Form 1040-X.
How this page differs from the others
Compare CP13, where the same kind of correction left a zero balance.
More IRS notice pages
Other pages in this set: CP2000, CP13, CP103, CP107, CP108, CP133, CP136, CP153, CP2005. For the codes on an IRS account transcript, see the IRS transcript codes lookup. For how interest and penalties are worked out on a balance, see the IRS penalty and interest calculator.
Sources
- Understanding your CP16 notice: what the notice is, what to do, FAQ, injured spouse. Read November 2, 2026.
IRS page last reviewed July 17, 2026. This page restates what the IRS page says and adds nothing beyond it: no timelines, outcomes or advice that the IRS page does not state. The IRS can change a notice page at any time; the notice you received controls, including its response date and contact details.
Frequently asked questions
What does an IRS CP16 notice mean?
The IRS corrected one or more mistakes on your return and, because you or your spouse owe other tax debts, applied all or part of your refund to those debts.
Do I need to respond to a CP16?
No, if you agree. If you disagree, contact the IRS at the number on the notice by the date indicated.
When will I get the rest of my refund after a CP16?
The IRS page says that if you are due a refund you should receive a refund check in 4-6 weeks.
My refund went to my spouse’s debt. What does the IRS page say?
It says you may be eligible for innocent or injured spouse relief and lists Form 8379, Injured Spouse Allocation.
Will the IRS keep applying refunds if I have a payment plan?
The IRS page says that if you still owe an outstanding balance for another tax year, it will continue to apply refunds to that balance until it is paid, even if you have a payment plan.
Not tax or legal advice
This page summarizes IRS notice pages and is not tax, legal or financial advice. It does not tell you how to respond to a notice beyond what the IRS page states. The notice you received controls. A CPA, enrolled agent or tax attorney, or the IRS number printed on your notice, can confirm what applies to you. Everything runs in your browser; nothing you enter is sent anywhere.