“In the February issue of the American Economic Review, researchers Kamila Sommer and Paul Sullivan consider the implications for the US housing market if this $90 billion subsidy to homeowners were to be scrapped. They find that getting rid of it would actually improve overall welfare by lowering home prices and expanding opportunities for home ownership among younger and lower-income households.
“The people who are the primary beneficiaries of the deduction are the high-income households,” Sommer said in an interview with the AEA. “When you take it away, house prices fall, they consume less housing, live in smaller houses…but the decline in house prices reduces the entry cost for the marginal households that are previously renting. It’s almost like this reallocation of housing from high-income households to low-income households.”
Critics say the mortgage interest deduction is a regressive tax policy that inflates prices and encourages buyers to choose more expensive houses and take on debt rather than sinking money into other investments. It also robs the Treasury of tax revenue that could be used to close the deficit. But real estate lobbyists say its repeal would depress homeownership and negatively impact social welfare.”
“More than half of all existing homeowners — 58 percent — would see their consumption improve after the reform, with most of the benefits going to young, low-income households. Rich homeowners with big properties suffer the most, since they have outsized amounts of mortgage interest that can be deducted from their income tax burden. When that benefit goes away they end up bearing the brunt of the impact.
It’s less certain whether there would be any meaningful impact on tax revenue for the government, the authors say. Getting rid of the deduction leads to a 2.6 percent increase in income tax revenue, but the falling home prices translate to a 7.8 percent drop in property tax revenue. Overall, it’s essentially a wash, with a total revenue gain of just one-half of a percentage point.”