Notice CP523 - Installment Agreement Default
IRC Section: IRC § 6159
Response Deadline: 30 days
You had a payment plan with the IRS, and you broke the terms. Maybe you missed a payment, maybe you didn't file this year's return, maybe you owe new tax. The IRS has cancelled the agreement. Your full balance is now due immediately, and collection enforcement can resume — including levies — without the normal notice sequence.
A CP523 means you have defaulted on your installment agreement. The IRS cancels your payment plan — usually because you missed a monthly payment, owed a new balance on a newly filed return, or failed to file a required tax return. Once the agreement is terminated, your full balance becomes immediately due and the collection process resumes from where it left off. The IRS can begin levy action without sending the full CP14 → CP501 → CP503 sequence again.
Common Triggers
- Missed payment
- Late tax return
- New balance due
Resolution Steps
- Step 1: Review why you defaulted (missed payment, late filing)
- Step 2: Contact us immediately to reinstate or modify
- Step 3: Make up the missed payment as soon as possible
- Step 4: Consider a new payment arrangement
- Step 5: Don't ignore this - agreement may be cancelled
Common Questions About CP523
- How do I reinstate my defaulted IRS installment agreement?
- Contact the IRS or a practitioner immediately. You'll need to bring missed payments current, file any missing returns, and pay a reinstatement fee. Acting within the cure window is critical — once the termination is permanent, you lose the streamlined reinstatement path.
- Can the IRS levy me immediately after a CP523?
- Not immediately, but faster than the normal sequence. Once the installment agreement is terminated, the IRS does not need to restart the full CP14 → CP501 → CP503 notice cycle. They can proceed to levy after a shorter warning period.
Related Notices
Additional Resources
This is an enforcement notice — the next move matters
This page explains what the letter is. For what to do — the deadline, the steps in order, and what representation changes — go to the action page on our resolution site: IRS CP523: What To Do Now →
No Menus. Just Answers.
Type your question, or tap the mic and just say it — I'm on around the clock and I never put you on hold. The more you tell me, the faster I get you a real answer. No forms to wrestle, no phone tag.
The fastest way to reach us is the chat above.
This form is for prospective clients only. No solicitation. Existing clients — please use the chat or call us directly.