Spain’s R&D Tax credit is generally set at a 25% of qualified R&D expenses. Additionally, when the expenditure exceeds the average of the 2 previous years, that incremental QE receives a 42% benefit. A monetised tax credit is also available, at a slightly lower benefit, which also requires pre-approval and usually has a 2 year wait to receive the benefit.
The definition of R&D applied for the evaluation of projects is rather tight, with a higher degree of novelty required.
There is another possible qualification for projects as 'Technological Innovation'. This type of project is eligible for a 12% tax credit and the evaluation criteria are lighter, and allows many more projects to qualify.