Relatively new. At first it was limited to mortgage insurance on homes purchased after Dec. 31, 2006 and only for insurance payments made in the year 2007.
A second law extended the deduction (only for homes acquired after Dec. 31, 2006) for another three years, 2008. 2009 and 2010. It has since been extended through 2011.
The deduction covers mortgage insurance provided by the Veterans Administration, the Federal Housing Administration, the Rural Housing Administration as well as private mortgage insurers.
Note: The IRS says that mortgage insurance provided by the Department of Veterans Affairs is commonly known as a funding fee. If provided by the Rural Housing Service, it is commonly known as a guarantee fee. The funding fee and guarantee fee can either be included in the amount of the loan or paid in full at the time of closing.