For those considering a home purchase this fall, here are some other details about the first-time homebuyer credit:

The credit is 10 percent of the purchase price of the home, with a maximum available credit of $8,000 for either a single taxpayer or a married couple filing jointly. The limit is $4,000 for a married person filing a separate return. In most cases, the full credit will be available for homes costing $80,000 or more.
The credit reduces the taxpayer’s tax bill or increases his or her refund, dollar for dollar. Unlike most tax credits, the first-time homebuyer credit is fully refundable. This means that the credit will be paid to eligible taxpayers, even if they owe no tax or the credit is more than the tax owed.
Only the purchase of a main home located in the United States qualifies. Vacation homes and rental properties are not eligible.
A home constructed by the taxpayer only qualifies for the credit if the taxpayer occupies it before Dec. 1, 2009.
The credit is reduced or eliminated for higher-income taxpayers. The credit is phased out based on the taxpayer’s modified adjusted gross income (MAGI). MAGI is adjusted gross income plus various amounts excluded from income—for example, certain foreign income. For a married couple filing a joint return, the phase-out range is $150,000 to $170,000. For other taxpayers, the range is $75,000 to $95,000. This means the full credit is available for married couples filing a joint return whose MAGI is $150,000 or less and for other taxpayers whose MAGI is $75,000 or less.
The credit must be repaid if, within three years of purchase, the home ceases to be the taxpayer’s main home. For example, a taxpayer who claims the credit based on a qualifying purchase on Sept. 1, 2009, must repay the full credit if he or she sells the home or converts it to business or rental use at any time before Sept. 1, 2012.