Notice CP523 is the IRS telling you that your installment agreement is over. A missed payment, a new tax balance, or an unfiled return triggered the default — and now the IRS is 30 days away from levying your assets. This is a critical notice that demands immediate action.

Why Installment Agreements Default

The three most common causes of a CP523 default are:

1. A missed or returned monthly payment

2. A new tax liability assessed after the agreement was established

3. Failure to file a required tax return on time

Under the terms of most installment agreements, any of these events gives the IRS the right to terminate the agreement and resume collection action.

Your 30-Day Window

CP523 gives you 30 days before the IRS can levy. That 30-day window is your opportunity to either reinstate the agreement or negotiate a new one. Don't waste a day of it.

Your 3-Step Action Checklist

1. Pay the missed amount immediately. If the default was caused by a single missed payment, paying it quickly is often enough to request reinstatement by phone.

2. File any unfiled returns. If an unfiled return triggered the default, file it (or an extension) before you contact the IRS. You can't reinstate an agreement while out of compliance on filing.

3. Call the IRS or hire representation. Reinstatement isn't automatic — you may need to formally request it via Form 9465 and explain the default circumstances.

Can You Reinstate the Agreement?

Often, yes. The IRS allows one reinstatement as a courtesy, especially for first-time defaults. But you must act within the 30-day window, and you must be in full filing compliance at the time of reinstatement. A tax attorney can call the IRS directly, request a hold on levy action, and negotiate reinstatement terms while you get the missed payment covered.

Contact us immediately if CP523 arrived. Thirty days moves fast.