- Mar 20, 2000
- 102,397
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why is home mortgage interest deductible? it isn't a subsistence deduction because people without money are renting (plus the deduction is available for secound houses, for interest up to $1 million of debt, and interest on up to $100,000 of second mortgage debt); the value of the subsidy rises with income since its a deduction in a progressive tax scheme (regressive form); it incentivizes people to do something they already would do (buy a house), which means that the house market is overcapitalized compared to other investments; and the subsidy goes at least in part to two groups: sellers (who can charge more for the building) and lenders (who can charge more for their money).