Most IRS collection never sees a courtroom. The lien arises by operation of law, and the Service collects administratively — by levy on accounts and wages, by seizure and sale. But when the administrative route cannot reach the value — the equity sits in a co-owned home, a homestead is in the way, the property is held by a nominee, or the collection statute is about to run — the government turns to federal court. There it does two related things: it reduces the assessment to a judgment, and it forecloses the federal tax lien.

It is litigation, not a unilateral act

A collection suit is not something the IRS does on its own say-so. Under § 7401, no civil action to collect a tax may be commenced unless the Secretary authorizes it and the Attorney General directs it — in practice, the Tax Division of the Department of Justice files and litigates the case, with district-court jurisdiction under § 7402. That means the taxpayer (and any third party with an interest in the property) is a defendant in real litigation, with the defenses and procedural protections that come with it.

Reducing the assessment to judgment — and why

The first move is often to reduce the assessment to a court judgment. The reason is partly about time. The IRS ordinarily has ten years from assessment to collect (the CSED under § 6502), but a timely suit preserves collection, and the resulting judgment is enforceable well beyond the original ten-year window — and is renewable. A looming collection statute, or an account where administrative collection has stalled against reachable equity, is a classic trigger for the government to sue rather than let the clock run out.

Foreclosing the lien — § 7403

Section 7403 is the foreclosure vehicle. The United States files an action to enforce the lien and subject the property to the payment of the tax, and it must join everyone who claims an interest in the property — co-owners, mortgage holders, junior lienors. The court then adjudicates the merits of every claim and lien, and where the government’s interest is established, it may decree a sale of the property free and clear, with the proceeds distributed according to the parties’ respective interests (§ 7403(c)).

ASSESSEDTax assessed;lien arisesBLOCKEDLevy / seizureinsufficient§ 7403 SUITDOJ files indistrict courtJUDGMENTReduce to judgment;join all claimantsJUDICIAL SALECourt orders sale(Rodgers)The court ranks every claim and may order the whole property sold free and clear, distributing proceeds by priority —a non-debtor co-owner (even a spouse) is compensated from the proceeds. A judgment also extends collection past the CSED.Foreclosing a principal residence is constrained: the IRS must show other property is insufficient and no undue hardship.
When administrative collection cannot reach the equity, the government goes to court — reducing the assessment to a judgment and asking the court to order a sale under § 7403.

Rodgers: the whole property can be sold

The most striking feature of § 7403 was settled in United States v. Rodgers, 461 U.S. 677 (1983): the statute contemplates sale of the entire property, not merely the delinquent taxpayer’s fractional interest — even where a non-delinquent third party, such as a spouse with a homestead right, co-owns it. The non-debtor is not wiped out; that person is compensated out of the sale proceeds for the value of their interest, and the Supremacy Clause lets the federal foreclosure override a state homestead exemption. The Court did, however, leave district courts limited equitable discretion to decline a forced sale in appropriate cases — § 7403 “does not require a district court to authorize a forced sale under absolutely all circumstances.”

Rodgers: the whole house can be soldUnder United States v. Rodgers, a court can order the sale of the entire property even where a non-delinquent spouse or co-owner has an interest — that person is paid their share from the proceeds, and federal law overrides a state homestead exemption. The court’s discretion to refuse the sale is narrow.

The protections — and the limits

The remedy is powerful, but it is not unbounded. Foreclosing on a principal residence is constrained: the IRS’s own procedures generally require a determination that the taxpayer’s other property would be insufficient and that the foreclosure and sale would not impose an undue economic hardship. And because the suit is adversarial, the merits are genuinely contestable — the validity of the assessment, the priority and validity of the lien, the true ownership interests in the property, and the equities a court may weigh under Rodgers are all litigated, not assumed.

A judgment outlives the ten-year clockReducing an assessment to judgment is partly about time: a timely § 7403 suit preserves collection, and the judgment remains enforceable long after the ordinary CSED would have expired. A collection statute about to run is a classic reason the government sues.

How it fits with nominee and alter-ego claims

The foreclosure suit is frequently the judicial vehicle that carries a nominee, alter-ego, or transferee theory. When the equity the IRS wants sits in an LLC or in a spouse’s name, the government sues both to establish that the property is reachable — that the entity is an alter ego, or the titleholder a nominee — and to foreclose in the same action. The two ideas work together: one identifies the property as the taxpayer’s in substance, the other turns it into cash.

The practical takeaway

A § 7403 action is the heaviest tool in the collection arsenal and a real lawsuit, with real defenses, brought by the Department of Justice. It tends to appear in a recognizable set of circumstances: reachable equity the IRS cannot get to administratively, co-owned or homestead property, nominee or alter-ego holdings, or a collection statute about to expire. When a revenue officer starts talking about referring a case for suit — or a complaint arrives — it is litigation, and it calls for litigation counsel.