据估计针对美国住房债务的总体实际年度补贴额约占国民年收入的1 ％ ， 其中最大部分是房屋抵押贷款利息的免税额，可是这种做法在耗费大量政府收入的同时又很难在分配上实现其合理性 — — 只有那些收入高到可以将其列入免税项目的人才可以享受这种福利。
The overall effective annual subsidy to US housing debt has been estimated at roughly 1% of national income. The largest component of this subsidy is the tax deductibility of home mortgage interest, which costs a lot of revenue and is hard to justify on distributive grounds: the benefit goes only to those with incomes high enough to itemize deductions.