Doctrine by topic · DGT Observatory

Mortgage Guarantee: DGT doctrinal evolution

How the DGT's position on this topic has evolved, and the rulings it rests on.

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How the DGT's position has evolved

Stable position Medium confidence 20 rulings · 2015–2025

Current position

For the deduction of interest in income from real estate capital, it is essential to prove the destination of the capital to the property and the justification of its repayment. A mortgage guarantee on the primary residence does not prevent deductibility if means of proof are provided that link the loan to the acquisition. In sale and purchase transactions with price retention to cancel mortgages, the taxpayer substitution applies to the total amount of the sale.

The DGT's position does not show a single doctrinal evolution, as the rulings address disparate aspects: AJD (Stamp Duty), deductions in IRPF (Personal Income Tax), and taxpayer substitution. There is no change of criterion regarding the mortgage guarantee itself, but rather a dispersion of applications depending on the tax and the factual circumstances. The doctrine remains stable across its various fields of application.

Turning points

  1. V0880-23

    Establishes the taxpayer substitution when the acquirer retains part of the price to cancel the mortgage, applying to the total amount of the sale.

Analysis based on 20 of 20 rulings with a stated position. Updated 25 September 2026.

Rulings on this topic

20
V0319-25 18 Mar 2025

Mortgage debt recognition may be exempt from AJD if VPO requirements are met

SG de Impuestos Patrimoniales, Tasas y Precios Públicos
reconocimiento de deudagarantía hipotecariavivienda de protección oficialcuota variabletransmisiones patrimoniales onerosas TRITPAJD — RDLeg 1/1993 de ITP y AJD art. 7.1TRITPAJD — RDLeg 1/1993 de ITP y AJD art. 7.5
Affects CompanyExpat · Non-residentIndividual
V1643-19 2 Jul 2019

Lender is the taxable person for stamp duty in mortgage loan deeds

SG de Impuestos Patrimoniales, Tasas y Precios Públicos
sujeto pasivoactos jurídicos documentadosescrituras de préstamogarantía hipotecariaprestamista TRITPAJD — RDLeg 1/1993 de ITP y AJD art. 29RD-ley 17/2018
Affects CompanyExpat · Non-residentIndividual
V0152-19 23 Jan 2019

Lender is the taxable person in mortgage-backed loan deeds

SG de Impuestos Patrimoniales, Tasas y Precios Públicos
póliza de créditogarantía hipotecariasujeto pasivotransmisiones patrimoniales onerosascuota variable TRITPAJD — RDLeg 1/1993 de ITP y AJD art. 7.1.BTRITPAJD — RDLeg 1/1993 de ITP y AJD art. 7.5
Affects CompanyExpat · Non-residentIndividual
V2581-18 20 Sept 2018

Mortgages securing third-party debt are not deductible for Inheritance Tax

SG de Impuestos Patrimoniales, Tasas y Precios Públicos
masa hereditariahecho imponiblesujeto pasivobase imponibledeuda deducible LISD — Ley 29/1987 de Sucesiones y Donaciones art. 3.1.aLISD — Ley 29/1987 de Sucesiones y Donaciones art. 5.a
Affects CompanyExpat · Non-residentIndividual
V2599-17 13 Oct 2017

Mortgages securing third-party debts cannot be deducted from estate assets

SG de Impuestos Patrimoniales, Tasas y Precios Públicos
base imponiblevalor netocargas y gravámenesgarantía hipotecariadeuda ajena LISD — Ley 29/1987 de Sucesiones y Donaciones art. 9LISD — Ley 29/1987 de Sucesiones y Donaciones art. 12
Affects CompanyExpat · Non-residentIndividual

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