Doctrine by topic · DGT Observatory

Insufficiency of Tax Liability: 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 8 rulings · 2014–2026

Current position

In Corporate Income Tax (IS), in the presence of a minimum net tax liability, the entity may apply the R&D&i deduction with a 20% discount without a limit on the gross tax liability and request a refund of the excess. In Personal Income Tax (IRPF), amounts not deducted due to insufficiency of the gross tax liability cannot be applied in subsequent tax years; carry-forward is only possible when the maximum annual deduction base is exceeded.

The DGT's position remains constant for both taxes. In Corporate Income Tax (IS), the application of the 20% discount and the right to a refund after determining the minimum net tax liability is confirmed. In Personal Income Tax (IRPF), the impossibility of offsetting amounts not applied due to insufficiency of tax liability in following years is reiterated.

Analysis based on 8 of 8 rulings with a stated position. Updated 2 October 2026.

Rulings on this topic

8
V0588-26 11 Mar 2026

Cannot carry forward excess energy rehabilitation deduction beyond integral quota

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por obras de rehabilitación energéticacuota íntegra estatalbase máxima anual de deduccióneficiencia energéticaperíodo impositivo LIRPF — Ley 35/2006 del IRPF art. Disposición adicional 50ªLGT — Ley 58/2003 General Tributaria art. 89.1
Affects CompanyExpat · Non-residentIndividual
V2138-25 12 Nov 2025

Deductions for home ownership investment cannot be carried forward

SG de Impuestos sobre la Renta de las Personas Físicas
deducción por inversión en vivienda habitualcuota íntegrarégimen transitorioinsuficiencia de cuotaperiodo impositivo LIRPF — Ley 35/2006 del IRPF art. 68.1LIRPF — Ley 35/2006 del IRPF art. 69.2
Affects CompanyExpat · Non-residentIndividual
V2211-24 15 Oct 2024

Settling I+D+i deduction with negative taxable base possible if minimum liquidated amount met

SG de Impuestos sobre las Personas Jurídicas
deducción por investigación y desarrollomonetización de deduccionescuota líquida mínimabase imponible negativainsuficiencia de cuota LIS — Ley 27/2014 del Impuesto sobre Sociedades art. 29.1LIS — Ley 27/2014 del Impuesto sobre Sociedades art. 29.6
Affects CompanyExpat · Non-residentIndividual
V0309-23 16 Feb 2023

Abono possible for audiovisual deduction despite minimum tax liability

SG de Impuestos sobre las Personas Jurídicas
deducción por producción audiovisualcuota líquida mínimainsuficiencia de cuotaabono de deduccionesgastos de producción LIS — Ley 27/2014 del Impuesto sobre Sociedades art. 30 bisLIS — Ley 27/2014 del Impuesto sobre Sociedades art. 36.2
Affects CompanyExpat · Non-residentIndividual

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