What caused your installment agreement to default
The most common reasons a CP523 is issued:
- Missed payment — even one missed automatic debit or check payment can trigger a default notice
- New tax liability not included in the agreement — if you filed a return for a newer tax year and it has a balance due, that new balance often defaults the existing agreement unless it was restructured
- Unfiled return — installment agreements require you to stay current on all required filings; an unfiled return can trigger default even if you haven't missed a payment
- Levy or offset by the IRS — if the IRS applied your refund to the balance (expected and allowed) but this counted as a payment irregularity in their system
Romeo Razi — Former IRS Auditor
"The CP523 surprises people because they thought they were handling it. The issue is usually not the missed payment itself — it's that a new tax year came due and they didn't realize it became part of the agreement requirements. The IRS expects you to stay current on everything, not just the old balance. Once people understand what triggered the default, fixing it is usually straightforward."
What happens when an installment agreement is terminated
When the IRS terminates your agreement, your full remaining balance — including accrued penalties and interest — becomes immediately due. More importantly, the agreement was serving as a "stay" on active collection. Once terminated, the IRS's ability to levy wages and bank accounts is restored.
The IRS won't typically levy immediately upon termination — they'll usually issue updated collection notices. But the protection that an active installment agreement provided is gone, and the escalation sequence to LT11 (Final Notice of Intent to Levy) can proceed.
How to respond to a CP523
- Identify what caused the default. Check your IRS Online Account (irs.gov/account) to see your payment history and any new balances. This tells you whether the default was a missed payment, a new tax liability, or an unfiled return.
- Cure the default if possible. If you missed a payment, making that payment immediately (and catching up any missed months) can sometimes reinstate the agreement — particularly if this is your first default and you call the IRS's installment agreement line to request reinstatement.
- File any missing returns. If an unfiled return triggered the default, file it immediately. You may be able to add the new balance to a restructured agreement.
- Request a new installment agreement. If the agreement can't be reinstated, you can apply for a new one. The terms may be different — particularly if your balance has grown or your financial situation has changed.
- Consider whether an OIC is now more appropriate. If your financial situation has significantly worsened since the original agreement was set up, an Offer in Compromise may now make more sense than reinstating a payment plan you can no longer sustain.
⚠ Do not ignore the CP523. The most common mistake is assuming the existing agreement is still in force because autopay hasn't been cancelled. Once the termination is finalized, you're in the same position as someone who never had an agreement — the IRS can levy without additional notice (other than the LT11 they'd issue to restart the formal collection sequence).
Reinstating vs. restructuring vs. replacing your agreement
Reinstatement
If this is your first default and you catch up the missed payment(s) quickly, you can often call the IRS and request reinstatement. The IRS frequently grants this as a one-time courtesy, particularly for agreements that had been in good standing. You may need to provide updated financial information.
Restructuring
If a new tax balance pushed you into default, restructuring the agreement to include the new balance is the most common path. Your monthly payment will likely increase to cover the new balance within the remaining statute period, but the structure of the agreement remains.
New agreement
If the original agreement is terminated before you can act, you apply for a new installment agreement from scratch. Depending on your total balance, this can be done online (under $50,000) or requires a Form 9465 with financial information.
Frequently asked questions about CP523
I just missed one payment — is my agreement definitely terminated?
Not necessarily. The CP523 is a notice of intent to terminate — you typically have 30 days to cure the default before termination is finalized. Call the IRS at the number on the notice, make the missed payment, and request that the agreement be reinstated. For agreements in good standing with no prior defaults, this often works.
Can I keep making my normal payment while the CP523 is being resolved?
Yes, and you should. Continued payments demonstrate good faith and may help reinstatement. Stopping payments because you think the agreement is over is one of the worst things you can do — it makes the default worse and harder to reverse.
Will a CP523 default show up on my credit report?
The installment agreement default itself doesn't directly appear on credit reports. However, if the termination leads to a federal tax lien filing (which becomes possible once the agreement is terminated and the balance is overdue), that lien filing can appear in public records and affect credit. Reinstating or replacing the agreement quickly prevents this escalation.
What if I genuinely can no longer afford my payment plan?
Your financial situation may have changed enough to warrant a lower monthly payment (based on updated income/expense documentation), Currently Not Collectible status if you're genuinely unable to pay anything, or an Offer in Compromise if your financial outlook has changed significantly. A CP523 is sometimes the appropriate point to re-evaluate what resolution fits your actual situation.
Romeo Razi, CPA
Former IRS Tax Examiner (Individual & Employment Tax Division) · CPA · Featured in MarketWatch, U.S. News & World Report, Realtor
Romeo conducted face-to-face audits at the IRS across sole proprietors to mid-sized businesses, worked on worker reclassification audits with the Department of Labor, and prepared disputed returns for Tax Court and Appeals. He founded
Taxed Right LLC in 2015 to put that insider knowledge to work for taxpayers.
Other IRS notices & strategies explained by a former IRS auditor:
CP523 received? Your payment plan is at risk — act this week.
Romeo knows the installment agreement system from the inside. He can help identify what triggered the default, negotiate with the IRS to reinstate or restructure your agreement, and prevent levy action from restarting.
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