Doctrine by topic · DGT Observatory

Undivided Interest: 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 84 rulings · 2014–2026

Current position

The deduction for investment in the primary residence applies only to the amounts paid for the proportional share of the property held by the taxpayer. In the event of excess payments by a co-owner, the surplus does not generate a right to deduction and is considered a loan or a gift to the other owner. Following the dissolution of a co-ownership (condominium), the new owner may deduct the amount that the former co-owner would have been entitled to deduct had the dissolution not occurred.

The DGT's position remains constant regarding the application of the deduction for investment in the primary residence, limited to the participation quota of each co-owner. Rulings have specified that the novation of loans or the acquisition of new undivided interests do not increase the right to deduction. The doctrine has focused on delimiting the scope of transitional regimes and the nature of payments made by co-owners.

Turning points

  1. V1402-23

    Establishes that if a joint borrower pays more than their proportional share, the excess is not deductible and is considered a loan or gift in favor of the other co-owner.

  2. V1228-26

    Allows the new owner following the dissolution of a co-ownership to deduct the amount that the former co-owner would have been entitled to deduct according to the transitional regime.

Analysis based on 81 of 84 rulings with a stated position. Updated 21 September 2026.

Rulings on this topic

24
V0991-26 5 May 2026

Deduction for habitual residence possible after condominium extinction

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualrégimen transitorioextinción de condominioparte indivisapleno dominio LIRPF — Ley 35/2006 del IRPF art. 68.1.1ºLIRPF — Ley 35/2006 del IRPF art. 68.1.2º
Affects CompanyExpat · Non-residentIndividual
V1935-25 15 Oct 2025

Rental income must be charged for non-residential shared property share

SG de Impuestos sobre la Renta de las Personas Físicas
renta imputadavivienda habitualcopropiedadvalor catastralderecho real de disfrute LIRPF — Ley 35/2006 del IRPF art. 85LGT — Ley 58/2003 General Tributaria art. 89.1
Affects CompanyExpat · Non-residentIndividual
V1549-25 2 Sept 2025

Spouse donating share in home loses home investment deduction

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualrégimen transitorioparte indivisadonaciónresidencia habitual LIRPF — Ley 35/2006 del IRPF art. 67.1LIRPF — Ley 35/2006 del IRPF art. 68.1
Affects CompanyExpat · Non-residentIndividual
V1150-25 1 Jul 2025

Deduction for home investment not possible without property ownership

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualpleno dominioparte indivisaresidencia habitualrégimen transitorio LIRPF — Ley 35/2006 del IRPF art. 68.1LIRPF — Ley 35/2006 del IRPF art. disposición transitoria 18ª
Affects CompanyExpat · Non-residentIndividual
V0493-25 27 Mar 2025

Home ownership deduction based on property ownership and own funds

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualproindivisorégimen de separación de bienesprestatario solidarioparte indivisa LIRPF — Ley 35/2006 del IRPF art. 67.1LIRPF — Ley 35/2006 del IRPF art. 68.1
Affects CompanyExpat · Non-residentIndividual
V1029-23 26 Apr 2023

Deduction for main residence cannot be applied if property ownership is lost

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualtitularidad del pleno dominiodisposición transitoria decimoctavaresidencia habitualparte indivisa LIRPF — Ley 35/2006 del IRPF art. 68.1LIRPF — Ley 35/2006 del IRPF art. disposición transitoria 18ª
Affects CompanyExpat · Non-residentIndividual

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