A tax credit is a dollar-for-dollar reduction in what the taxpayer owes. This means that a taxpayer who owes $7,500 in income taxes and who receives a $7,500 tax credit would owe nothing to the IRS.
A tax deduction is subtracted from the amount of income that is taxed. Using the same example, assume the taxpayer is in the 15 percent tax bracket and owes $7,500 in income taxes. If the taxpayer receives a $7,500 deduction, the taxpayer’s tax liability would be reduced by $1,125 (15 percent of $7,500), or lowered from $7,500 to $6,375.
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