IRS CP523 Notice: Default, 30-Day Cure, and Payment Options

An IRS CP523 notice tells you that the IRS considers your installment agreement in default and intends to terminate it in 30 days. After that, the full remaining balance becomes due at once and the IRS can begin levying your wages, bank accounts, and other property.¹ The notice itself is the warning the law requires the IRS to send before pulling the plug, so the 30-day window is where almost all of your options live.²

Read the notice itself first. It will state the specific reason for the default and the exact amount needed to cure it.³ Everything else you do depends on which trigger applies to you.

Why the IRS Says You Defaulted

A missed installment payment is the obvious trigger, but it isn’t the only one. The IRS can also default your agreement for any of these reasons:

Owing a new tax balance you didn’t pay by the due date, even if every scheduled installment is current.
Failing to provide updated financial information the IRS requested, which comes up most often with partial-payment agreements.
Providing inaccurate or incomplete financial information before the agreement was approved.
A substantial improvement in your finances that the IRS determines justifies modifying or ending the agreement.

The Internal Revenue Manual confirms that a new balance on a related account — a sole proprietorship, for example, when you have a personal agreement — defaults the agreement the same way a missed payment does.⁴ That is how taxpayers who have never missed a monthly payment end up holding a CP523: they filed this year’s return, owed a few hundred dollars, and didn’t pay it on time.

What to Do in the 30-Day Window

Federal law requires the IRS to give at least 30 days’ notice, with the reason for the action, before terminating an installment agreement.² The CP523 is that notice. You have two basic paths during those 30 days: cure the default, or appeal.

Cure the Default

If the trigger is a missed payment, make the payment. If it is a new tax balance, pay that balance. If it is an unfiled return, file it. The notice spells out what is required to bring the agreement back into good standing.³

Reinstating the agreement comes with a fee. The standard reinstatement fee is $89. Taxpayers at or below 250% of the federal poverty guidelines pay $43, and that reduced fee is waived if you agree to pay electronically by debit.⁵ If you handle the reinstatement through the IRS online payment agreement tool, the fee drops to $10.⁶

Appeal If the Notice Is Wrong

If you believe the default is a mistake — the payment was made, the IRS applied it to the wrong account, the return it says is missing was actually filed — you can appeal through the Collection Appeals Program. File Form 9423, Collection Appeals Request, and send it to the address on your CP523.³ For installment agreement disputes, you do not have to request a conference with the collection employee’s manager first, even though that step is normally required for other collection actions.⁷

What Termination Actually Costs

If you let the 30 days run out without curing the default or filing an appeal, the agreement terminates. The entire remaining tax debt, with every accrued penalty and interest charge, becomes due immediately.³ The payments you have already made are credited against the total, but you lose the right to spread the rest across future months.

The arithmetic also gets worse quickly. During an active installment agreement, the failure-to-pay penalty runs at 0.25% per month. Once the agreement is terminated, it jumps back to 0.5% per month, and interest keeps running on top. So the balance you owe after termination is not simply what was left on the schedule.

What Collection Looks Like After Termination

Once the agreement is gone and your appeal rights are used up, the IRS has its full enforcement toolkit.

A Notice of Federal Tax Lien creates a legal claim against everything you own — real estate, vehicles, bank accounts, and other property or rights to property.⁹ A lien doesn’t seize anything by itself, but it ranks the government ahead of most other creditors and makes selling or refinancing property very difficult.

A levy is actual seizure. The IRS can garnish wages, take funds from bank accounts, seize vehicles and real estate, and reach accounts receivable, retirement account distributions, rental income, and the cash value of life insurance.¹⁰ A bank levy freezes the account for 21 days before funds are turned over, which is a narrow window to work with.¹¹

If your total liability — tax, penalties, and interest combined — exceeds $66,000, the IRS can certify your debt as seriously delinquent to the State Department, which will generally refuse to issue or renew your passport and may revoke one you already have.¹² That threshold is adjusted annually. Entering a new installment agreement or being placed in Currently Not Collectible status is among the ways to reverse the certification.

Options If You Can’t Just Pay

If curing the default is not financially realistic, you still have alternatives. Ignoring the notice is the worst of them, because resolving a case after a levy is considerably harder than resolving it before one.

A New or Reinstated Installment Agreement

You can request a new agreement, though the IRS will look harder at you after a default. When your debt excluding interest and penalties is under $10,000 and you have not defaulted on an agreement in the previous five years, the law requires the IRS to accept an installment agreement if you offer to pay in full within three years.² Above that threshold, approval is discretionary, and the IRS may ask for updated financial information.

Partial Payment Installment Agreement

If you can’t pay the full balance before the collection statute expires, a Partial Payment Installment Agreement bases monthly payments on what you can actually afford. The IRS generally expects you to use available asset equity first and reviews your finances every two years to check whether your situation has improved.¹³ Whatever remains when the collection statute runs out is written off.

Currently Not Collectible Status

If any payment would leave you unable to cover basic living expenses, you can ask the IRS to report your account as Currently Not Collectible. Collection activity pauses, though the debt itself remains and interest and penalties keep accruing. The IRS reviews your finances periodically to decide whether collection should resume.¹⁴ If the ten-year collection statute runs out while you are in CNC status, the balance is eventually forgiven, though certain actions can extend that clock.

Offer in Compromise

An Offer in Compromise settles your tax debt for less than the full amount, but the IRS accepts one only when it concludes it cannot collect the full amount by any other means, or when there is genuine doubt that you owe the tax. The application carries a $205 fee plus an initial payment, and processing typically takes several months. A prior default will not help your case, but a well-documented offer based on current inability to pay can still be accepted.

1
Internal Revenue Service. Understanding Your CP523 Notice
2
Office of the Law Revision Counsel. 26 USC 6159 – Agreements for Payment of Tax Liability in Installments
3
Internal Revenue Service. IRS Notice CP523 – Notice of Intent to Levy and Intent to Terminate Installment Agreement
4
Internal Revenue Service. IRM 5.14.11 – Defaulted Installment Agreements
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Internal Revenue Service. Form 433-D – Installment Agreement
6
Internal Revenue Service. Online Payment Agreement Application
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Internal Revenue Service. Collection Due Process (CDP)
9
Office of the Law Revision Counsel. 26 USC 6321 – Lien for Taxes
10
Internal Revenue Service. What Is a Levy
11
Internal Revenue Service. Levy
12
Internal Revenue Service. Revocation or Denial of Passport in Cases of Certain Unpaid Taxes
13
Internal Revenue Service. IRM 5.14.2 – Partial Payment Installment Agreements and the Collection Statute Expiration Date
14
Internal Revenue Service. Temporarily Delay the Collection Process