The Treasury Department said on Thursday it has signed six more anti-tax evasion pacts with foreign governments, including several jurisdictions previously criticized as tax havens.
The agreements were completed this past week with Bermuda, Malta, the Netherlands and three UK Crown Dependencies: Jersey, Guernsey and the Isle of Man, the department said.
The agreements are part of a U.S. effort to enforce the Foreign Account Tax Compliance Act (FATCA), enacted in 2010 and set to take effect next July.
FATCA requires foreign financial institutions to tell the Internal Revenue Service about Americans' offshore accounts worth more than $50,000. It was enacted after a Swiss banking scandal showed U.S. taxpayers hid substantial fortunes overseas.
(Read more: Nearly 1,200 IRS vendors owe back taxes)
With these six deals finalized, the United States now has 18 agreements in place and another 11 near completion.