A tax credit of up to $8,000 is now available for qualified first-time home buyers purchasing a principal residence on or after January 1, 2009 and before December 1, 2009. Unlike the tax credit enacted in 2008, the new credit does not have to be repaid. Here are a few things you need to know about the freshly-enacted $8,000 first-time home buyer tax credit.

• First time buyers defined: A "first-time home buyer" is someone who hasn't owned a principal residence for three years before buying a house. (The date of purchase is considered the day that the title is transferred.) That means if you've owned a vacation home--but not a principal residence--within the past three years, you would still qualify for the credit.
• 2009 buyers only: Only those who purchase a home on or after January 1 and before December 1, 2009 are eligible for the credit. Anyone who bought a home last year won't be able to take advantage of it.
• 10%, up to $8,000:  The tax credit is 10% of the purchase price of the home up to $8,000.  To be eligible, a qualified buyer must close by November 30, 2009.
• Income limits: The tax credit is subject to income limitations. Single buyers need a modified adjusted gross income of $75,000 or less to qualify for the full credit, that's $150,000 for married couples. Those earning more than these thresholds may be eligible for reduced credits.
• Recapture: Buyers have to own the home for at least three years in order to capitalize on the credit. If they sell the home before then, they will have to return the credit to the government. (Exceptions will be made in certain cases, such as death or divorce.)