When you refinance a mortgage on a first or second home (15.1) for the same amount as the remaining principal balance on the old loan, there is no change in the tax treatment of interest. In other words, if interest was fully deductible on the old loan, then it is fully deductible on the new loan.
If you refinance a home mortgage for more than the existing balance, the deductibility of interest on the excess amount depends upon how you use the funds and the amount of refinancing. If the excess amount is used to buy, build, or substantially improve your first or second home, then it is considered home acquisition debt (15.2). If the excess plus all other home acquisition loans does not exceed $1 million ($500,000 if married filing separately), the interest is fully deductible. If the excess is used for any other purpose, such as to pay off credit card debt or to finance a child’s education, the excess is considered home equity debt (15.3). If the excess plus all other home equity loans does not exceed $100,000 ($50,000 if married filing separately), the interest is fully deductible. If the refinanced loan is partly home acquisition debt and partly home equity debt, the overall limit of $1.1 million applies ($1 million home acquisition debt and $100,000 home equity debt) or, if married filing separately, $550,000 ($500,000 home acquisition debt and $50,000 home equity debt).
Interest paid on loans in excess of home acquisition and home equity debt ceilings is generally treated as nondeductible personal interest unless the proceeds are used for business or investment purposes (15.12).
Refinanced pre–October 14, 1987 loans are not subject to the $1 million home acquisition and $100,000 home equity debt ceilings during the period of the original loan term. However, after the end of the loan term, the ceilings apply to the refinanced amount as explained above. Furthermore, where a refinanced pre–October 14, 1987 debt exceeds the remaining principal balance, the excess is also subject to the $1 million home acquisition and $100,000 home equity debt ceilings.
The IRS does not allow a current deduction for points on a refinanced mortgage. According to the IRS, the points must be deducted ratably over the loan period, unless part of the new loan is used for home improvements. Thus, if you pay points of $2,400 when refinancing a 20-year loan on your principal residence, the IRS allows you to deduct only $10 a month, or $120 each full year.
A federal appeals court rejected the IRS allocation rule where points are paid on a long-term mortgage that replaces a short-term loan; see the Court Decision in this section (15.7).
If part of a refinancing is used for home improvements to a principal residence, the IRS allows a deduction for a portion of the points allocable to the home improvements.
If you are ratably deducting points on a refinanced loan and you refinance again with a different lender, or the mortgage ends early because you prepay it or the lender forecloses, you can deduct the remaining points in the year the mortgage ends (15.8).
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