[20171114]IF10584_税收改革的关键问题：按揭利息扣除.pdf

https:/crsreports.congress.gov Updated November 14, 2017Key Issues in Tax Reform: The Mortgage Interest DeductionTax reform proposals are generally structured around lowering tax rates while broadening the taxable base. The base-broadening component of tax reform could be most directly accomplished by eliminating special provisions in the tax code known as tax expenditures. One of the largest tax expenditures is the mortgage interest deduction (MID). On the one hand, modifying or eliminating the mortgage interest deduction could raise significant revenue. On the other hand, any change could affect individual homeowners and the overall economy. Brief Summary of Current Law Currently, a homeowner may deduct the interest paid on a mortgage that finances a primary or secondary residence as long as the homeowner itemizes their tax deductions. The amount of interest that may be deducted is limited to the interest incurred on the first $1 million of combined mortgage debt and the first $100,000 of home equity debt ($1.1 million total). If a taxpayer has a mortgage exceeding $1 million, they may still claim the deduction, but they must allocate their interest payments appropriately to ens