What "seriously delinquent tax debt" means
The law behind this is Internal Revenue Code Section 7345. It only applies to what the statute calls a seriously delinquent tax debt. A big balance by itself isn't enough. All of these have to be true:
The tax has been formally assessed, it's unpaid, and it's still legally collectible. The total, including penalties and interest, is more than the annual threshold. For 2026, that's more than $66,000, and the number goes up with inflation every year. And the IRS has either filed a Notice of Federal Tax Lien and your appeal rights on it are used up or expired, or the IRS has issued a levy.
Notice what that means. Plenty of people owe more than $66,000 without being certified, because the IRS hasn't filed a lien or levied yet. And plenty of people get certified without doing anything new, because interest and penalties quietly pushed an old balance over the line.
Debts the IRS won't certify
Even if you're over the threshold, some debts are excluded. The IRS won't certify a debt that's being paid on time under an installment agreement, a debt covered by an accepted offer in compromise, or a debt where a Collection Due Process hearing on a levy is pending. A pending innocent spouse request also protects the liability it covers.
The IRS has also said it won't certify debts in several other situations, including accounts in Currently Not Collectible hardship status, taxpayers in bankruptcy, identity theft victims, deceased taxpayers, people in federally declared disaster areas, and people with a pending installment agreement request or pending offer. If one of those fits you, certification may be avoidable altogether.
How you find out
When the IRS certifies your debt, it mails you Notice CP508C. Pay attention to this: the IRS says it doesn't send a copy of that notice to your power of attorney. If you have a representative, tell them the day it arrives.
Before the State Department revokes a passport you already hold, the IRS generally sends Letter 6152, which warns you that revocation is coming and gives you another chance to resolve the debt. If you apply for a new passport or a renewal while you're certified, the State Department will typically hold your application for a limited time to give you a chance to fix things before it denies it.
How to get your passport back
Certification gets reversed when the debt is no longer seriously delinquent. The main ways to get there:
Pay the balance in full. Get into an installment agreement and make the payments. Get an offer in compromise accepted. Prove the debt was certified in error, for example because it was already being paid under an agreement or the collection statute had expired. Or get into a status that's excluded, such as Currently Not Collectible.
Here's the part most people miss. Paying the balance down below the threshold usually doesn't reverse a certification that already happened. You need full payment or a qualifying arrangement. If you're writing a big check just to get under $66,000, talk to someone first.
Once the debt is resolved, the IRS notifies the State Department, generally within 30 days. If you have international travel coming up or you live abroad, the IRS can expedite the reversal, but you have to ask, and you have to show the need.
You also have a right to challenge a certification you believe is wrong. The law lets you ask the U.S. Tax Court or a federal district court to decide whether the certification was erroneous.
If you live overseas
This hits expats hardest. If you live abroad and your passport is revoked, the State Department may issue a limited passport that only lets you travel back to the United States. That's not a trip anyone wants to plan around. If you're outside the country and owe the IRS, get ahead of this before your renewal comes due.
This is general information, not legal advice, and every case is different. The right move depends on how much you owe, whether you're already certified, and when you need to travel.
