If your IRS installment agreement has defaulted, you generally have 30 days from the date on Notice CP523 to reinstate it: pay any past-due amount listed on the notice, fix whatever triggered the default (a missed payment, an unfiled return, an unpaid new balance), and pay a reinstatement user fee of $89, reduced to $43 for low-income taxpayers or as little as $10 through the Online Payment Agreement tool. Miss that window and the IRS terminates the plan, regains full authority to levy your wages and bank accounts, and your failure-to-pay penalty doubles. An IRS payment plan default is fixable, but the clock is short and the cost of delay is real.1Internal Revenue Service. Understanding Your CP523 Notice
Why the IRS Defaulted Your Plan
Four things can put an installment agreement into default under the tax code. Knowing which one applies to you determines how to cure it.2Office of the Law Revision Counsel. 26 U.S. Code 6159 – Agreements for Payment of Tax Liability in Installments
The most common trigger is a missed monthly payment or a bank draft that came back unpaid. One is enough.3Internal Revenue Service. IRM 5.14.11 Defaulted Installment Agreements
The second catches people who thought they were doing everything right. Your agreement requires you to file every federal return on time and pay any new balance in full by its due date. Owe $800 on this year’s return and skip paying it? The IRS can default the plan you’ve been faithfully paying on the old debt.4Internal Revenue Service. Payment Plans; Installment Agreements
The other two are less common. The IRS can terminate if your financial condition has significantly changed (an inheritance, a large raise) or if the financial information you originally supplied turns out to be inaccurate or incomplete. Ignoring an IRS request for updated financial information can also default the plan.
What Notice CP523 Means
Notice CP523 does two jobs in one letter. It tells you the IRS intends to terminate your installment agreement, and it serves as a formal notice of intent to levy your wages, bank accounts, or other property.5Internal Revenue Service. Notice CP523 English
You have 30 days from the date on the notice to act. Cure the default or file an appeal inside that window and the agreement stays alive by law. Let the 30 days pass with no response and the agreement terminates.
What Termination Actually Costs You
While your agreement is in place, the failure-to-pay penalty runs at a reduced 0.25% per month on the unpaid balance. Once the plan ends, it doubles to 0.5%. If the IRS later issues a levy notice and you don’t pay within 10 days, it climbs to 1% per month.6Internal Revenue Service. Failure to Pay Penalty
Interest keeps compounding daily throughout, at the federal short-term rate plus 3%. An installment agreement never reduced your interest; it only softened the penalty.
Then there’s the lien risk. If the IRS held off filing a Notice of Federal Tax Lien when you entered the plan, a default gives it grounds to file. For balances of $10,000 or more, the IRS generally will file after a default. A lien attaches to what you own, appears on public records, and complicates selling property, refinancing, or borrowing.7Internal Revenue Service. IRM 5.12.2 Notice of Lien Determinations
How to Reinstate Within the 30 Days
Reinstatement is straightforward when you move quickly. Fix the underlying problem, pay any “Past Due Amount Due Immediately” shown on the CP523, and pay the reinstatement user fee.
If missed payments caused the default, catch them up. If an unfiled return caused it, file the return. If a new tax balance caused it, pay that balance. Then call the number on your notice to formally request reinstatement, or use the Online Payment Agreement tool.
The Reinstatement Fee
The standard fee is $89. Low-income taxpayers pay $43, and it may be waived entirely in some cases.8eCFR. 26 CFR Part 300 – User Fees
Reinstating online through the IRS Online Payment Agreement tool costs just $10 regardless of income. If you qualify as low-income, even that $10 may be reimbursed.9Internal Revenue Service. Online Payment Agreement Application
Low-income for this purpose means adjusted gross income at or below 250% of the federal poverty guidelines. For 2026, that’s an AGI of $39,900 or less for a single person in the 48 contiguous states, or $82,500 for a family of four (higher in Alaska and Hawaii). Apply using Form 13844.10Internal Revenue Service. Application for Reduced User Fee for Installment Agreements
Stopping It From Happening Again
If a missed payment caused the default, switch to a Direct Debit Installment Agreement when you reinstate. Payments pull automatically from your bank account, so there is nothing to forget. The Online Payment Agreement tool lets you convert during reinstatement.
Appealing a Default You Think Is Wrong
If you believe the IRS defaulted your plan in error, or you need more time to work out the terms, file an appeal under the Collection Appeals Program. Complete Form 9423, check “Termination of Installment Agreement,” and explain what you disagree with and how you would resolve the debt. Submit it to the IRS office that took the action, not directly to Appeals, within 30 days of the proposed termination date on your CP523.11Internal Revenue Service. Form 9423, Collection Appeal Request Instructions
Filing inside that 30-day window has a critical effect: the IRS cannot terminate the agreement or levy while the appeal is pending. The Office of Appeals aims to resolve installment agreement cases within 15 business days. A managerial conference before the case moves to Appeals is not required, but the IRS recommends it because many disputes settle there.12Internal Revenue Service. IRM 8.24.1 Collection Appeals Program (CAP)
Even if the agreement has already been formally terminated, you still have 30 days from the termination effective date to appeal, and the IRS remains barred from levying during that appeal period.13eCFR. 26 CFR 301.6331-4 – Restrictions on Levy While Installment Agreement Is Pending or in Effect
If the 30 Days Are Already Gone
Once the agreement terminates and the appeal window closes, the IRS regains full collection authority. You still have options, but each one takes more effort than a simple reinstatement would have.
Apply for a New Installment Agreement
You can apply for a brand-new plan rather than reinstating the old one. That means the full application process again, with a new setup fee. If your finances have changed since the original agreement, a fresh plan may fit your current ability to pay better than the old terms did.
Partial Payment Installment Agreement
If the original monthly payment was more than you could sustain, a Partial Payment Installment Agreement may work better. You make smaller monthly payments with the understanding that part of the debt may go unpaid before the collection statute expires. The IRS reviews your finances at least every two years and can raise the payment if your situation improves. Balances over $25,000 for individuals or $10,000 for businesses must be paid by direct debit.14Taxpayer Advocate Service. Partial Payment Installment Agreement
Currently Not Collectible Status
If your basic living expenses eat everything you earn, you can ask the IRS to place your account in Currently Not Collectible status. Collection activity stops, but penalties and interest keep accruing and the IRS will revisit your finances periodically. CNC is a pause, not a resolution.15Internal Revenue Service. Temporarily Delay the Collection Process
Offer in Compromise
An Offer in Compromise settles the debt for less than the full balance when the IRS believes collecting in full is unlikely given your income, expenses, and assets. The application requires a $205 nonrefundable fee and an initial payment (20% of the offer for a lump-sum proposal, or the first monthly installment for a periodic proposal). Low-income taxpayers are exempt from both. You must be current on all filings before the IRS will consider your offer, and the review takes months.16Internal Revenue Service. Offer in Compromise
What Default Does to the 10-Year Collection Clock
The IRS generally has 10 years from the assessment date to collect a tax debt. The clock keeps running while your installment agreement is active. It freezes for 30 days once the agreement terminates, and stays frozen for the entire length of any appeal you file.17Internal Revenue Service. IRM 5.1.19 Collection Statute Expiration
For most people that adds only a few weeks or months. If your collection statute expiration date is close and you’re weighing an appeal, know that appealing extends the IRS’s collection window by exactly the length of the appeal.