IRS CP523 After an Installment-Agreement Default: Cure, Reinstatement, and Appeal

Review the primary official source.

CP523 is a proposed-termination and collection warning

A CP523 means the IRS plans to end your installment agreement. Act on the notice now: The IRS’s CP523 guidance says to contact the agency promptly, no later than 30 days from the notice date. Check the stated reason and termination date before choosing between correcting the default and challenging it.

Do not assume a payment made yesterday has fixed the account. Even after taking corrective action, call the number on the notice to confirm the IRS has recorded it and determine whether reinstatement is needed. Keep the confirmation with your payment record.

Identify and document the default

Compare the required installment with the actual bank transaction and the tax period to which the IRS applied it. A bank debit can establish that money left your account; it does not, by itself, explain how the IRS credited that money. Record the amount, due date, transaction reference and account application separately.

Then check for a different problem. The IRS’s installment-agreement default procedures, section 5.14.11.3, identify missed payments, new unpaid tax and missing requested financial information among the possible grounds. Bring the notice, agreement, payment confirmations, filed-return acknowledgments and any request for financial information to the call. Ask which condition remains unsatisfied rather than simply asking whether the account is current.

Evaluate cure, reinstatement, or modification

If you can correct the stated default, ask what payment or information is needed before the termination date. If you cannot maintain the agreed payment, explain the change in your finances and ask whether revised terms are available. A reinstatement fee may apply; the IRS notice guidance also warns that a new tax liability may have to be paid in full.

For a proposed revision, prepare monthly income, necessary expenses and the amount you can actually pay. Separate a request to change future payments from a claim that the IRS misapplied a past payment. Each needs different supporting records. You can also review our tax services when deciding what assistance to request.

Preserve Collection Appeals Program rights

You may challenge a proposed or actual installment-agreement termination through the Collection Appeals Program (CAP). The Form 9423 instructions say to submit the request to the office or revenue officer that took the action, not directly to Appeals. For an installment-agreement appeal, a manager conference is recommended but is not required. Do not apply the form’s shorter lien-and-levy conference rules to this different appeal.

Identify the tax periods, the termination you dispute, why it is wrong and your proposed solution. Attach the relevant agreement, notice and payment or compliance proof. Keep the signed request and evidence of delivery together. A useful explanation connects each disputed default to its supporting document.

The IRS collection appeal procedures, section 5.19.8.4.16.5, distinguish the 30-day proposed-termination period from a further 30-day appeal period after termination. Do not treat that sequence as permission to wait: Verify the actual notice and account status. An appeal of the proposed termination does not create a second appeal of the same issue after termination. Levy restrictions during these periods and a timely appeal have defined limits; they are not a promise that every IRS collection action stops.

For a focused review, assemble:

• The complete CP523 and its envelope, with the notice date and proposed termination date marked.
• The installment terms and payment ledger, including bank confirmations and IRS account credits.
• Proof of any new tax payment, filed return or financial-information response.
• Your proposed cure or revised payment amount and the records supporting it.
• The appeal request, delivery proof and notes of IRS responses.

If a separate penalty notice is also involved, keep its response track distinct. Our penalty-notice discussion addresses that different question.

Verification before action

CAP is an administrative collection appeal. According to IRS Publication 1660, Collection Appeal Rights, it does not let you contest the existence or amount of the tax and does not provide court review of the CAP decision. A qualifying lien or levy notice may instead carry separate Collection Due Process (CDP) rights. Form 9423 and Form 12153 serve different procedures.

Put every notice on the table before selecting a route. A CP523 response does not replace a timely CDP request on another notice, and a conversation with Collection does not extend that other deadline. Ask counsel to identify which action is being appealed, which office must receive each request and what remains due while the disagreement is pending.