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1 Patrick Fleenor, Tax Savings from Mortgage Interest Deduction Vary Significantly from State to State 1 (2010)

handle is hein.taxfoundation/ffcdaxz0001 and id is 1 raw text is: FISCAL
FOUNDATIONFC
May25, 2010
No. 230                  FC
Tax Savings from Mortgage Interest Deduction
Vary Significantly from State to State
By Patrick Fleenor
Newly released IRS tax data by state for 2008 illustrate how much more the mortgage interest
deduction is worth to some states than others (see Table 1 below). Sound tax policy dictates that
interest payments be deductible only when they are incurred to produce taxable income, such as
those resulting from a small business loan. Mortgage interest on a principal residence doesn't meet
this requirement, but a special exception was carved out at the inception of the income tax in 1913,
and the mortgage interest deduction has become one of the largest and most sacrosanct loopholes
in the tax code.
For tax year 2008, a little over one quarter of the nation's tax returns claimed the mortgage interest
deduction, 26.8 percent of the nation's 143 million tax returns. Rates of home ownership are much
higher than this, but many home owners don't claim the deduction. Often they live in low-cost
homes for which the deduction isn't large enough to make a tax difference, so they don't itemize
deductions on their tax returns. In addition, home owners who have paid off their mortgages make
no interest payments to deduct.
The average tax return in the U.S. deducted $3,279 in mortgage interest; that includes all tax
returns, even the non-homeowners and non-itemizers. Counting only the tax returns that deducted
mortgage interest, the average amount was $12,221.
Overall, Maryland and California are the biggest winners. Maryland had the highest percentage of
tax returns claiming the deduction, 37.9 percent, and average dollar amounts claimed were also
high. It had the second-highest average deduction among all tax returns, $5,372, and counting only
the tax returns that claim the mortgage interest deduction, the average Maryland tax return claimed
$14,162 in mortgage interest. That is the fifth highest nationwide.
California had a lower percentage of tax returns claiming the deduction, but when Californians
deduct mortgage interest, the amounts are high. Of California's 16.4 million tax returns, about
three in ten deducted mortgage interest, 29.2 percent, 19th highest nationwide. But California
ranked highest in average deduction among deducting returns, $18,876, and also highest among all
returns, $5,520. Hawaii also ranked high, with its famously expensive homes, as did Nevada

Patrick Fleenor is chief economist at the Tax Foundation.

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