Doctrine by topic · DGT Observatory

Principal Repayment: 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 48 rulings · 2015–2024

Current position

The novation, subrogation, or substitution of a loan does not exhaust the right to the deduction for investment in a primary residence. The installments of the new loan are deductible in the proportional part attributable to the repayment of the original loan intended for the housing. In the event of an increase in the principal, only the part intended to cover the cancellation costs of the previous loan is deductible.

The DGT's position remains constant in establishing that the modification of financing conditions does not interrupt the deduction process. Throughout the rulings, it has been specified that deductibility is strictly limited to the proportional part of the original loan, excluding the increase in principal due to expansion unless it covers cancellation costs.

Turning points

  1. V3182-19

    Establishes that the substitution of a loan does not exhaust the possibilities for deduction, allowing it to be applied to the proportional part attributable to the original loan.

  2. V2492-24

    Specifies that in cases of principal increases, only the part intended to cover the cancellation costs of the previous loan is deductible.

Analysis based on 47 of 48 rulings with a stated position. Updated 23 September 2026.

Rulings on this topic

24
V1929-22 12 Sept 2022

Right to tax deduction for main residence maintained when replacing a mortgage loan

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualrégimen transitoriosustitución de préstamoamortización de principalnovación hipotecaria LIRPF — Ley 35/2006 del IRPF art. 68.1.1ºLIRPF — Ley 35/2006 del IRPF art. 70.1
Affects CompanyExpat · Non-residentIndividual
V1455-22 20 Jun 2022

Deduction for main residence must be regularised if floor clause refunds are deposited into account rather than used to repay principal

SG de Impuestos sobre la Renta de las Personas Físicas
cláusula suelodeducción por inversión en vivienda habitualamortización de principalcuota líquidaregularización LIRPF — Ley 35/2006 del IRPF art. disposición adicional cuadragésima quintaRIRPF — RD 439/2007, Reglamento del IRPF art. 59
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
V2219-20 30 Jun 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 principalintereses hipotecariosrégimen transitorio LIRPF — Ley 35/2006 del IRPF art. 68.1LIRPF — Ley 35/2006 del IRPF art. 70
Affects CompanyExpat · Non-residentIndividual
V2188-20 29 Jun 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 habitualamortización de principalintereses hipotecariossustitución de préstamorégimen transitorio LIRPF — Ley 35/2006 del IRPF art. 68.1.1ºLIRPF — Ley 35/2006 del IRPF art. 70
Affects CompanyExpat · Non-residentIndividual

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