If you miss an IRS installment payment, the agreement doesn’t end that day. The IRS mails you Notice CP523, which gives you 30 days to catch up before it terminates the plan and starts collecting the full balance by lien, bank levy, or wage garnishment. Act inside that window and reinstatement is usually cheap; ignore it and the discounted penalty rate you enjoyed under the agreement disappears while the IRS’s collection powers come back online.
Notice CP523 and the 30-Day Clock
The first thing that arrives after a missed payment is Notice CP523, titled “Intent to Terminate Your Installment Agreement.” It states the exact amount you need to pay to get current and warns that the IRS will terminate the agreement and begin seizing assets if you don’t respond within 30 days of the notice date.1Internal Revenue Service. Understanding Your CP523 Notice
CP523 is also a formal Notice of Intent to Levy. The IRS has to send that notice before it can garnish wages or freeze bank accounts, so the same letter both offers you a chance to fix the default and satisfies the legal prerequisite for later collection action.2Office of the Law Revision Counsel. 26 USC 6331 – Levy and Distraint The clock starts on the notice date, not the day you open the envelope.
Your Penalty Rate Doubles Immediately
While an installment agreement is in good standing, the failure-to-pay penalty runs at 0.25% of the unpaid balance per month, half the standard 0.5% rate. That discount only applies if you filed the underlying return on time.3Internal Revenue Service. Failure to Pay Penalty4Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax
Once the agreement defaults, the penalty snaps back to 0.5% per month.5Internal Revenue Service. Internal Revenue Manual 5.14.11 – Defaulted Installment Agreements On a $30,000 balance, that’s an extra $75 a month. Interest keeps running on top of the penalty, at a rate the IRS sets quarterly. For the quarter beginning April 1, 2026, the underpayment rate is 6% per year.6Internal Revenue Service. Internal Revenue Bulletin 2026-08 Both compound on the full outstanding balance until you pay it.
How to Reinstate Your Agreement
Call the number on the CP523 as soon as it arrives. The representative can tell you the exact amount needed to cure the default, including missed installments and accrued penalties. Don’t wait until day 29.
The reinstatement user fee depends on how you apply:
- Online through the IRS Online Payment Agreement tool: $10.
- By phone, mail, or in person: $89.7eCFR. 26 CFR 300.2 – Restructuring or Reinstatement of Installment Agreement Fee
- Low-income taxpayers (income at or below 250% of the federal poverty level): $43 by phone or mail, and the fee may be reimbursed entirely if you set up direct debit payments.8Internal Revenue Service. Payment Plans; Installment Agreements
The $10 online route is by far the cheapest. Try it first.
If You Can’t Cover the Full Catch-Up
When the missed amount is more than you can pay in one shot, ask the IRS to modify the plan rather than reinstate the old terms. Modification usually means submitting updated financial information so the IRS can recalculate what you can afford. Have Form 433-F ready, with details on your income, expenses, and assets.
Reinstatement isn’t automatic, especially if the agreement has defaulted before. The IRS can refuse. If it does, you can appeal the termination through the Collection Appeals Program by filing Form 9423,9Internal Revenue Service. Instructions for Form 9423 – Collection Appeal Request or request a hearing with the IRS Independent Office of Appeals if you disagree with the reason given.1Internal Revenue Service. Understanding Your CP523 Notice
What Happens If the 30 Days Run Out
If you neither cure the default nor reach the IRS within 30 days, the agreement terminates and the entire remaining balance becomes due immediately. The IRS can then use its full collection toolkit.
Federal Tax Liens
The IRS can file a Notice of Federal Tax Lien, a public record that attaches the government’s claim to everything you own: real estate, vehicles, bank accounts, and any property you acquire while the lien is in place.10Internal Revenue Service. Understanding a Federal Tax Lien A lien doesn’t seize anything, but it makes selling property or getting approved for new credit very difficult because the government’s claim takes priority over most other creditors.
Bank Levies
A bank levy freezes the funds in your checking or savings accounts. The bank must hold the frozen amount for 21 calendar days before sending it to the IRS.11Internal Revenue Service. Information About Bank Levies That window exists specifically to let you contact the IRS, fix errors, or arrange an alternative. Do nothing during those 21 days and the money goes to the IRS on the next business day after the holding period ends.12eCFR. 26 CFR 301.6332-3 – The 21-Day Holding Period Applicable to Property Held by Banks
Wage Garnishment
A wage levy is continuous, not one-time. The IRS notifies your employer, and a portion of every paycheck goes straight to the IRS until the debt is paid, a new payment arrangement is in place, or the levy is released.13Internal Revenue Service. Information About Wage Levies The exempt amount is calculated from your standard deduction and dependents, which means the seizure can take a large share of your pay.
Passport Denial or Revocation
If your total tax debt (with penalties and interest) exceeds $66,000, the IRS can certify it to the State Department as “seriously delinquent,” and the State Department can then deny a new passport application or revoke your existing passport. The threshold adjusts annually for inflation.14Internal Revenue Service. Revocation or Denial of Passport in Cases of Certain Unpaid Taxes Entering a new installment agreement or getting your account into Currently Not Collectible status removes the certification.
Property the IRS Cannot Seize
Federal law puts specific categories off-limits to levy even after termination:
- Clothing and schoolbooks needed by you and your family, with no dollar cap.
- Household goods and personal effects up to $6,250 in total value.
- Books and tools you need for your trade, up to $3,125 in total value.
- Unemployment benefits and workers’ compensation.
- Wages needed to comply with a court-ordered child support judgment.
- Social Security disability payments, public assistance, and certain veteran’s benefits.
Your principal residence is also protected unless the IRS obtains a federal court order specifically authorizing its seizure, which is rare and reserved for large debts where nothing else has worked.15eCFR. 26 CFR 301.6334-1 – Property Exempt from Levy
Options If Reinstatement Isn’t Realistic
A New Installment Agreement
You can apply for a fresh agreement, though the IRS will scrutinize the application more carefully after a default. You’ll pay the full setup fee again, and the IRS may require direct debit to reduce the risk of another miss.
Offer in Compromise
An Offer in Compromise lets you settle for less than you owe, but the IRS accepts these only when you genuinely cannot pay the full balance through any available means. Someone who could sustain an installment agreement usually won’t qualify.16Internal Revenue Service. Topic No. 204 – Offers in Compromise The upside worth knowing: while an OIC is pending, the IRS is prohibited by law from levying your property, and that protection extends for 30 days after a rejection and through any appeal.17Internal Revenue Service. Internal Revenue Manual 8.23.1 – Offer in Compromise Overview
Currently Not Collectible Status
If paying anything would prevent you from covering basic living expenses, ask the IRS to place your account in Currently Not Collectible status. The debt doesn’t disappear and penalties and interest keep accruing, but the IRS won’t pursue levies or garnishments while the status is in effect. The IRS may still file a tax lien to protect its interest.18Internal Revenue Service. Temporarily Delay the Collection Process You’ll typically need Form 433-F to document income, expenses, and assets, and the IRS reviews the status periodically.
Other Ways an Agreement Can Default
A missed payment is the obvious trigger, but not the only one. Under the statute governing installment agreements, the IRS can also terminate if you:
- Owe a new tax liability that isn’t paid when due, including quarterly estimated payments or insufficient withholding.
- Fail to file a required return on time during the life of the agreement, even one on which nothing is owed.
- Provided inaccurate income or asset information in your original application.
- Ignore an IRS request for updated financial information.
The IRS can also modify or end an agreement if it decides your financial condition has changed significantly, in either direction.19Office of the Law Revision Counsel. 26 USC 6159 – Agreements for Payment of Tax Liability in Installments Each of these triggers the same CP523 notice and 30-day response window as a missed installment.
Preventing the Next Miss
The simplest guard against default is a Direct Debit Installment Agreement, which pulls the payment automatically from your bank account each month. You can’t forget what’s automatic. Direct debit agreements also carry a lower setup fee: $31 online for a new plan, compared with $178 for non-direct-debit plans set up by phone or mail.8Internal Revenue Service. Payment Plans; Installment Agreements
If your income is uneven, keep a buffer in the account tied to your payments and pick a draft date that lines up with when funds are most likely to be there. And if something changes mid-agreement, a job loss, a medical bill, anything that will make the next payment hard, call the IRS before you miss it. Requesting a modification is far simpler than curing a default after the fact. The Taxpayer Advocate Service can also step in if you’re facing genuine hardship and can’t resolve the issue through normal channels.20Taxpayer Advocate Service. Installment Agreements