Eoin Ó Broin (Dublin Mid West, Sinn Fein)
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50. To ask the Minister for Finance the cost in tax forgone from mortgage interest relief on rental income for each year since the relief was introduced. [41602/18]

Paschal Donohoe (Dublin Central, Fine Gael)
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I am advised by Revenue that due to the way in which a taxpayer‘s tax liability is determined, i.e. on all sources of incomes as a whole, it is not possible to provide exact figures in relation to the tax foregone as a result of the provision of mortgage interest relief on rental income.

However, using the total amount of interest declared on Income Tax returns, for both residential and commercial properties combined in cases where a rental income has been declared and applying an estimated average marginal rate of 30% to the interest, it is possible to estimate a tentative cost for interest relief from 2009.

The following table sets out the estimated cost since 2009, the earliest year this information is available, up to 2016. Information for 2017 will not be available until 2019.

It should be noted that these figures cover rental income from both commercial and residential properties.