Seriously Delinquent Tax Debt Cases Rise in 2025

Federal data shows a growing number of taxpayers entering seriously delinquent tax debt status as the Internal Revenue Service's enforcement returns to full strength. Treasury reports indicate that unpaid federal tax liability continues to rise, increasing the risk of tax liens, legal action, and passport restrictions for affected individuals.

Treasury Data Shows Increase in Delinquent Tax Debts

Recent federal reporting points to a rise in delinquent tax debts entering the 2025 filing season. The U.S. Treasury’s fiscal year 2024 Debt Collection Report shows that administrative receivable delinquencies reached $32.9 billion, an increase of $6.3 billion from the previous fiscal year.

At the same time, the Internal Revenue Service estimates the gross tax gap — the difference between taxes owed and taxes paid on time — at roughly $696 billion for tax year 2022. Even after enforcement recoveries, a large share remains unpaid, leaving many taxpayers with overdue taxes and outstanding tax liabilities from prior years.

IRS Collection Process Resumes After Shutdown Disruptions

The increase in unresolved federal tax liability comes as the IRS restarts its collection process following disruptions tied to the fall 2025 federal government shutdown. During that period, many collection proceedings slowed or paused, including notices, levy warnings, and revenue officer contact.

After operations resumed in November 2025, the Internal Revenue Service began addressing a backlog of enforcement actions. The agency has increased notices related to delinquent tax debts, including the filing of a Notice of Federal Tax Lien against personal property or other assets linked to unpaid tax liability.

Federal Law Defines Seriously Delinquent Tax Debt

The term "seriously delinquent tax debt" has a specific legal meaning under Internal Revenue Code Section 7345. A taxpayer’s federal tax liability reaches this status when unpaid taxes exceed $64,000 for the 2025 tax year, including interest and penalties.

In addition to crossing that threshold, the IRS must begin enforcement steps as part of its collection process. These actions often include filing a Notice of Federal Tax Lien or issuing a levy to collect outstanding tax liabilities.

Some taxpayers facing legal disputes may challenge enforcement actions in the U.S. Tax Court or U.S. District Court. However, unresolved delinquent tax debts can continue to accumulate interest and penalties while cases move through the legal process.

Passport Revocation Can Follow IRS Certification

One of the most serious consequences of seriously delinquent tax debt involves international travel plans. Under federal law, the IRS may certify qualifying delinquent tax debts to the State Department.

Once certification occurs, the State Department may deny a passport application or renewal. In some cases, the agency may also receive a referral to revoke passport privileges for taxpayers who fail to resolve their federal tax liability.

The IRS notifies affected taxpayers through Notice CP508C. After receiving a denial notice for a passport application, taxpayers typically have about 90 days to resolve the debt, enter into a payment plan, or establish a monthly payment plan with the IRS.

Payment Plans and Settlements May Prevent Certification

Taxpayers who establish an installment agreement under section 6159 or negotiate an offer in compromise under section 7122 may avoid certification and passport revocation. These options allow individuals with outstanding tax liabilities to resolve them through structured payment plans.

The Internal Revenue Service also offers penalty forgiveness in some cases. Reducing interest and penalties can lower a taxpayer’s total tax liability and help bring balances below the threshold that triggers seriously delinquent tax debt status.

Sources

• IRS Revocation or Denial of Passport in Cases of Certain Unpaid Taxes
• IRS CP508C Notice Explanation

‍By William Mc Lee, Editor-in-Chief & Tax Expert—Get Tax Relief Now