Doctrine by topic · DGT Observatory

Loan Extension: 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

Settled doctrine High confidence 12 rulings · 2014–2026

Current position

The extension or novation of a loan does not exhaust the right to the deduction for investment in a primary residence. It is permissible to deduct the proportional part of the installments (amortization and interest) attributable to the original loan intended for the acquisition of the residence. The part of the annual payments corresponding to the increase in the principal is not deductible if its purpose is different from the acquisition of the residence.

The DGT's position has remained constant since 2019. The criterion establishes that the extension of a loan does not extinguish the possibility of applying the deduction, provided that the part of the installments linked to the original capital intended for the residence is segregated. The rulings of 2020 and 2026 reiterate this proportionality mechanism.

Turning points

  1. V1367-19

    Establishes that in extended loans, only the annual payments in the proportional part exclusively intended to finance the acquisition of the residence grant the right to a deduction.

Analysis based on 12 of 12 rulings with a stated position. Updated 27 September 2026.

Rulings on this topic

12
V1129-26 19 May 2026

Deduction for habitual residence maintained after mortgage loan extension

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualrégimen transitorioampliación de préstamonovaciónamortización LIRPF — Ley 35/2006 del IRPF art. 68.1.1ºLIRPF — Ley 35/2006 del IRPF art. 70.1
Affects CompanyExpat · Non-residentIndividual
V2843-20 22 Sept 2020

Deduction for principal residence can be maintained after mortgage loan subrogation

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualsubrogación de préstamorégimen transitorioamortización de principalfinanciación ajena LIRPF — Ley 35/2006 del IRPF art. 68.1.1ºLIRPF — Ley 35/2006 del IRPF art. 70
Affects CompanyExpat · Non-residentIndividual
V1658-20 28 May 2020

Deduction for main residence can be maintained when replacing a mortgage loan

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualsubrogación hipotecariaamortización de principalrégimen transitoriofinanciación ajena LIRPF — Ley 35/2006 del IRPF art. 68.1.1ºLIRPF — Ley 35/2006 del IRPF art. 70
Affects CompanyExpat · Non-residentIndividual
V1596-20 26 May 2020

Tax relief for main residence may be maintained when replacing a mortgage loan

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualsubrogación hipotecariaamortización de principalintereses hipotecariosrégimen transitorio LIRPF — Ley 35/2006 del IRPF art. 68.1.1ºLIRPF — Ley 35/2006 del IRPF art. 70
Affects CompanyExpat · Non-residentIndividual
V1544-20 22 May 2020

Tax relief for main residence may be maintained when replacing a mortgage loan

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualsubrogación hipotecariaamortización de principalrégimen transitorioampliación de préstamo LIRPF — Ley 35/2006 del IRPF art. 68.1LIRPF — Ley 35/2006 del IRPF art. 70
Affects CompanyExpat · Non-residentIndividual
V0266-16 25 Jan 2016

No taxation for mortgage redistribution, but AJD applies to loan extension

SG de Impuestos Patrimoniales, Tasas y Precios Públicos
redistribución de la responsabilidad hipotecariaampliación de préstamoactos jurídicos documentadoscuota variablebase imponible TRITPAJD — RDLeg 1/1993 de ITP y AJD art. 2TRITPAJD — RDLeg 1/1993 de ITP y AJD art. 4
Affects CompanyExpat · Non-residentIndividual
V2258-14 3 Sept 2014

Taxation on mortgage loan extensions and interest novation may be exempt

SG de Impuestos Patrimoniales, Tasas y Precios Públicos
ampliación de préstamonovación modificativaactos jurídicos documentadosbase imponibleexención fiscal TRITPAJD — RDLeg 1/1993 de ITP y AJD art. 4TRITPAJD — RDLeg 1/1993 de ITP y AJD art. 7.5
Affects CompanyExpat · Non-residentIndividual

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