Abstract
This paper estimates, using a simultaneous equation model, the determinants of mortgage, including as a variable the tax saving due to the treatment of mortgage payments in Spanish income tax. We use an unusually rich data set obtained from a housing market intermediary with franchisers throughout the majority of the Spanish provinces. We observe that the income tax credit increased riskier borrowing during the housing boom years. Increasing by one percentage point the ratio of the present value of the stream of explicit tax savings to the price of the property, the mortgage amount granted increases by 1.6 %, whereas it causes a 2 % decrease in the term. This in turn, implies that the time discount factor increased in our sample by about 0.7–1.1 percentage points causing individuals to borrow riskier amounts of mortgage for shorter terms. This observation has important policy implications for governments wishing to foster real estate markets growth.
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Notes
Before 1992, mortgage interests were deductible from Italian income tax.
The main reason for the difference is that, although the sample begins in 2004, the observations for 2004 and 2005 do not contain term as a variable and were dropped.
Following Onrubia and Sanz (1999) and Sanromán (2006), the annual mortgage amount payable was calculated using the information on the total mortgage amount, the term and the interest rate granted, applying the finance law corresponding to a fixed instalment mortgage. This same finance law was subsequently applied to obtain the discounted value of the stream of tax savings.
Domínguez and López-Laborda (2001) present another alternative to evaluate the incentive effect of personal income tax with regard to housing decisions, using the net present value of the tax saving.
It is assumed in the calculation of the variable ‘tax saving’ that individuals take advantage of the provisional arrangements in compensation for income tax reform as stipulated in Law 35/2006 (in the sample there is no property eligible for the provisional arrangements as stipulated in Law 40/1998).
The discount rate at 5 % is the usually assumed level which corresponds to the long term state bonds at a particular moment in time (in our case it corresponds to the year 2007).
It is a complex task to translate this percentage into a quantity in absolute values of annual explicit tax saving, as it depends on both the price of the property and the mortgage amount and term. For an individual whose mortgage has an amount, term and appraisal value exactly equal to the average sample values, the increase in annual explicit tax saving would be approximately €180.
For statistics on the housing market in Spain see: http://www.bde.es/webbde/es/estadis/infoest/si_1_6.pdf
The bank default rate in Spain grew from 0.5 % in 2007 to 5.56 % in 2010.
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Raya, J.M., Kucel, A. Did Housing Taxation Contribute to Increase Riskier Borrowing?. J Real Estate Finan Econ 53, 90–113 (2016). https://doi.org/10.1007/s11146-015-9519-y
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DOI: https://doi.org/10.1007/s11146-015-9519-y