Justice Department attorney Stuart Gibson said Friday in a conference call with the judge that major issues have been resolved. He did not disclose details.
U.S. District Judge Alan S. Gold agreed to cancel a trial that was supposed to begin Monday.
The dispute involves about 52,000 Americans the U.S. believes are hiding billions of dollars of assets in UBS accounts. The bank and Swiss government say the names cannot be disclosed without violating long-standing Swiss bank secrecy laws.
U.S. Secretary of State Hillary Clinton and Swiss Foreign Minister Micheline Calmy-Rey are scheduled to discuss the issue Friday in Washington.