I am assuming you mean a difference on your personal income taxes. If so, Yes, the portion of each month's payments that are tax deductible (mortgage interest, property taxes, etc.) will multiply by the number of months that you were in the home. Check with your tax preparer for the deductibility of your closing costs, too, And this year's big bonus of the Federal tax credit mean 2010 will make this a big year for new homeowners. Best of luck to you.