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The Difference Between a Tax Credit and a Tax Deduction

A tax credit is much more valuable than a deduction, because it is subtracted after tax is computed rather than before. A simple example will clarify the difference.

Suppose that your combined income for the year was $100,000. The following table compares the effects on after-tax income between a $20,000 tax credit and a $20,000 deduction.

Value of a Credit Versus a Deduction

------------------------------------
CREDIT
DEDUCTION
-----------
-----------
income
$100,000
$100,000
-deductions
0
$20,000
----------
-----------
-----------
= taxable income
$100,000
$80,000
tax
$26,260
$22,400
- credit
$20,000
0
----------
---------
---------
= final tax
$6,250
$22,400
AFTER TAX INCOME
$93,740
$57,600
tax credit cost
$12,000
net
$81,740
$57,600
difference +
$24,140

This example illustrates the magnitude of the difference between a credit and a deduction. As you can see, a tax credit possesses more power for retaining income than a deduction.

With the rewrite of the tax code in 1986, Congress removed most of the significant tax credits -- Section 29 being a notable exception. However, Section 29 credits are only available through the year 2002.

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