Iceland vs Portugal: Implied tax subsidy rates on R&D expenditures
Implied tax subsidy rates on R&D expenditures over time
- Iceland
- Portugal
How they compare
Portugal currently reports 0.31 Index against 0.3 Index in Iceland, a difference of 0.01 Index.
Across all 26 years both countries report, Portugal has been ahead every year.
Iceland ranks 2nd and Portugal ranks 1st of 44 countries.
Portugal has averaged higher in every one of the 3 decades both report.
Head to head by decade
| Decade | Iceland | Portugal | Difference | Ahead |
|---|---|---|---|---|
| 2000s | -0.012 Index | 0.176 Index | 0.188 Index | Portugal |
| 2010s | 0.215 Index | 0.315 Index | 0.1 Index | Portugal |
| 2020s | 0.3 Index | 0.31 Index | 0.01 Index | Portugal |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher implied tax subsidy rates on r&d expenditures, Iceland or Portugal?
- Portugal, at 0.31 Index against 0.3 Index in Iceland as of 2025.
- What is the difference in implied tax subsidy rates on r&d expenditures between Iceland and Portugal?
- 0.01 Index, with Portugal ahead.
- How many years of comparable data are there for Iceland and Portugal?
- 26 years are reported by both, from 2000 to 2025.
- How do Iceland and Portugal rank globally for implied tax subsidy rates on r&d expenditures?
- Iceland ranks 2nd and Portugal ranks 1st of 44 countries.
- Where does this data come from?
- Organisation for Economic Co-operation and Development, published as Implied tax subsidy rates on R&D expenditures. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
The OECD R&D Tax Incentives database presents OECD time-series indicators of implied tax subsidy rates on R&D expenditures by firm size and profitability scenario for OECD member countries and other major economies, drawing on data collected in the OECD R&D tax incentives surveys since 2007. Implied R&D tax subsidy rates are defined as 1 minus the B-Index, a measure of the before-tax income needed by a “representative” firm to break even on one additional monetary unit of R&D outlay (Warda, 2001; OECD, 2023). The more generous the tax provisions for R&D, the lower the before-tax breakeven economic return required by firms and the higher the implied marginal R&D tax subsidy. The OECD time-series estimates of implied R&D tax subsidy rates is based on headline tax credit and allowance rates. Due to limited historical data availability, the estimates are not adjusted for provisions that bound the tax benefits received by firms (e.g. ceilings, thresholds). They therefore provide an upper bound for the marginal tax subsidy implied by R&D tax relief measures at central government level across countries over time. OECD (2019) provides a practical guide to using the OECD R&D Tax Incentives database, describing the R&D tax incentive time series data and highlighting their potential for internationally comparative work through descriptive indicators and econometric analysis.