Spain R&D and Innovation Tax Credits: Evidence First

Spain's corporate income tax law distinguishes research and development (R&D) from technological innovation. The labels used by a product or engineering team do not decide the tax result. The project content, technological uncertainty, advances sought and traceable expenditure do.

What the law separates

Article 35 of the Corporate Income Tax Law defines R&D and technological innovation separately and provides different deduction rates. R&D expenditure generally carries a 25% deduction, with 42% for eligible expenditure exceeding the prior two-year average, plus possible additional deductions for qualifying research staff and certain investments. Technological-innovation expenditure generally carries a 12% deduction. The statutory definitions, exclusions and location rules must be applied before any percentage.

Build the file project by project

1. Technical scope: problem, existing baseline, uncertainty, hypothesis and intended advance.
2. Activities: work packages, experiments, failures, iterations and milestones.
3. People: time evidence tied to named tasks rather than a retrospective flat allocation.
4. Costs: payroll, subcontractors, depreciation and materials reconciled to accounting records.
5. Funding: grants or other support that may reduce the deduction base.
6. Location and suppliers: confirm the statutory territorial rules for work performed or commissioned.

Evidence matters more than the project name

A roadmap, ticket system or technical report can help, but no single document proves eligibility. The file should let a reviewer connect each claimed cost to a qualifying activity and the accounts. Routine maintenance, cosmetic changes, ordinary configuration and commercial launch work should not be swept into the claim.

Application, limits and monetisation

Deductions interact with the general quota limits in article 39. R&D and innovation deductions may, subject to strict conditions, be applied outside those limits or paid with a 20% discount, after the required waiting period and within statutory caps. This is not automatic cash funding. The company must check timing, continued activity or investment, employment conditions and documentation.

Risk-control options

Companies can consider a reasoned report from the competent ministry and other statutory procedures to strengthen classification certainty. The tax computation, technical evidence and accounting treatment should be reviewed together before the corporate tax return is filed.

Official sources

• Corporate Income Tax Law, articles 35 and 39.
• Spanish Tax Agency: deductions and tax benefits.
• Ministry of Science: reasoned binding reports.

Reviewed on 26 August 2026. Eligibility and rates must be confirmed for the relevant tax period and project facts.