Missed payment
One or more required monthly payments may not have been received or properly applied.
IRS Notice CP523 • Installment Agreement Default
Received an IRS CP523 notice?
CP523 says your IRS installment agreement is in default. The IRS intends to terminate the agreement and may begin collection action if the problem is not corrected.
Contact the IRS as soon as possible and no later than 30 days from the notice date. Use the exact termination date printed on CP523.
There is no fee to book the call. No documents are required when booking. Have every page and enclosure from CP523 available during your call.
Sonya D. Bright, EA
Baytown-Based
Virtual Nationwide Service
What CP523 Means
The IRS plans to end the payment arrangement
The IRS issues CP523 when an installment agreement defaults. If the problem is not corrected, the agreement may be terminated and the full unpaid liability may again become subject to collection.
A levy is a legal seizure of property. It is different from a federal tax lien, which is a legal claim against property.
Why Agreements Default
Identify the exact problem before requesting reinstatement
New unpaid tax
A newly filed return with a balance due can violate the agreement’s requirement to remain current.
Missing return or information
The IRS may identify an unfiled return or requested financial update that was not provided.
Read CP523 carefully. The correction depends on the reason shown, and a payment should not be made blindly if the amount or payment history is wrong.
Ways To Correct The Default
The right response depends on current finances and compliance
Bring payments current
If the notice is correct and the payment is affordable, paying the required past-due amount before termination may prevent the agreement from ending.
Reinstate the agreement
The IRS may reinstate the existing terms after the default is corrected. A user fee may apply.
Restructure payments
If finances changed, the IRS may review updated financial information and consider a different monthly payment.
Correct payment application
If a payment was made but posted incorrectly, provide the payment date, amount, method, confirmation, and intended tax period.
Resolve new compliance
File required returns and address new balances when those issues caused the default.
Consider another collection status
If the agreement is no longer affordable, currently not collectible status or another available resolution may need evaluation.
What To Do
Correct the issue and confirm the agreement status
Confirm the reason
Compare the notice with account records, payment confirmations, filed returns, and the original agreement terms.
Choose a sustainable solution
Do not reinstate a monthly payment that current income and necessary living expenses cannot support.
Verify reinstatement
Even after paying or correcting the problem, contact the IRS as directed to confirm the action posted and the agreement is active.
Records To Review
Have these available for the call
- Every page and enclosure from CP523
- Earlier CP14, CP501, CP503, and CP504 notices
- Original installment agreement terms
- Payment confirmations and bank statements
- New balance-due notices or unfiled-return records
- Filed returns for all listed periods
- Payment and installment-agreement records
- Recent account transcripts, if available
- Collection financial information
- Prior audit, deficiency, or appeal notices
- Proof of any earlier IRS response
Appeal Rights
You may appeal a proposed or completed termination
Collection Appeals Program
If the issue cannot be resolved with the IRS, follow CP523 and Publication 1660 to request review by the IRS Independent Office of Appeals.
Form 9423
Form 9423 may be used for a Collection Appeals Program request. The filing route and time limit depend on the stage of the termination, so follow the notice instructions.
Frequently Asked Questions
IRS CP523 questions
Does CP523 mean the agreement is already terminated?
CP523 generally proposes termination in 30 days. Read the notice date and termination date to determine the current stage.
What if I already made the payment?
Contact the IRS to confirm the payment posted correctly and the installment agreement was reinstated or remains active.
Can the monthly payment be lowered?
Possibly. The IRS may request updated financial information and may restructure the agreement based on current ability to pay.
Can the IRS charge a reinstatement fee?
Yes. The IRS states that a fee may apply when an installment agreement is reinstated or restructured.
Is there a fee to book?
No. There is no fee to book the call. Professional work requires a separate written engagement.
Can TaxDecoders represent me?
Representation may be offered after the notice, deadlines, account history, compliance status, finances, and hearing issues are reviewed.
Verified Resources
Official IRS information
This page was reviewed on July 28, 2026. Always follow the dates and instructions printed on your actual notice.
Understanding CP523
Collection appeal rights
Collection appeal request
Act before the CP523 termination date.
Book a call with TaxDecoders. Have the complete notice, agreement terms, payment history, and exact termination date available during the call.
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