The science test is the same in every sector: systematic, investigative or experimental activity in a prescribed field, seeking a scientific or technological advancement and resolving a scientific or technological uncertainty. Ireland's industrial mix, with a large pharmaceutical and medical device base, a software sector dominated by multinational development centres and a strong food industry, gives Revenue plenty of experience of where the work sits and where claims overreach. This page walks through the main sectors; the industry guides go deeper.
Where qualifying work sits by sector
| Sector | Usually qualifies | Usually does not | Watch for |
|---|---|---|---|
| Software | Experimental development to resolve technological uncertainty in algorithms, architecture, performance or data | Business application development, routine maintenance, use of known methods and tools | The Regulations' software exclusions; multinational cost-plus centres |
| Pharmaceuticals and biotechnology | Discovery, formulation, process development, clinical development | Routine quality control and release testing, regulatory paperwork | Grants; work outside the EEA and UK; subcontracting caps on CROs |
| Medical devices | Design and development to resolve technical uncertainty, verification testing that informs design | Validation to a known standard, cosmetic changes, regulatory submissions | When the uncertainty is resolved versus when the product is approved |
| Engineering and manufacturing | New products, materials and processes developed through trials | Routine production, troubleshooting breakdowns, tooling with known outcomes | Pilot plants not wholly for R&D; corrective action exclusion |
| Food and agriculture | Formulation and process experiments with measured technical outcomes; agricultural science trials | Taste-driven recipe changes, packaging aesthetics | Cosmetic and stylistic exclusion; consumer surveys |
| Construction and engineering services | Novel structural, materials or systems solutions with real uncertainty | Standard designs, compliance with codes | Who bears the risk and owns the result |
Software
Software is where Irish claims are most often reduced. Revenue's guidance states that the development of business application software, routine computer maintenance and development using known methods and tools do not qualify unless the work resolves a scientific or technological uncertainty, and Revenue applies this firmly: a new product built by applying established techniques, the integration of systems through documented interfaces and the configuration of platforms are development, not R&D. The advancement must be in computer science or software engineering as a field, not in the company's product or its business model.
Multinational development centres face an additional question: whether the Irish company carries on the R&D itself, bears the cost and is entitled to the results, or is merely performing services for a parent that owns the outcome. Revenue looks at the intercompany agreements. Agile teams should record the technical unknown each sprint addresses and end the R&D when it is resolved.
Pharmaceuticals and medical devices
Life sciences work is close to the paradigm of the definition, and the Irish issues are structural. Clinical trials and contract research are often subcontracted, and the subcontracting cap, the greater of 15% of the company's own qualifying expenditure or €100,000, bites hard on a company that outsources most of its development; third level collaborations have their own 5% or €100,000 cap. Trials run outside the EEA are excluded. Grants from the IDA or Enterprise Ireland for the same work reduce qualifying expenditure. For medical devices, Revenue distinguishes verification testing that feeds back into design, which can be part of the R&D, from validation and regulatory testing to a known standard, which is excluded as routine testing.
Engineering and manufacturing
Process development on the factory floor qualifies where a technological uncertainty was resolved by systematic trials: a new alloy through an existing line, a process window for a new material, a fixture that had to be developed and tested. Two exclusions in the Regulations matter here. Corrective action in connection with breakdowns during commercial production is out, so troubleshooting is never R&D however difficult. And the design, construction and operation of pilot plants qualify only where wholly and exclusively for R&D, so a pilot line that also fills orders is excluded or apportioned.
Other sectors
Food and agriculture. Formulation to achieve a technical result, such as shelf life, stability or nutritional profile, and agricultural trials of varieties, feed and husbandry are experimental development in the prescribed fields. Recipe changes for taste and packaging design are cosmetic or stylistic alterations, excluded. Consumer surveys and market testing are excluded.
Construction and engineering services. Novel solutions can qualify, but the company that carries on the R&D at its own cost and owns the result claims; work to a client's specification paid for regardless of outcome is generally the client's, and often qualifies for nobody.
Financial services and other service sectors. Claims rest on software, and the software exclusions apply with full force.
Energy and cleantech. Development qualifies in the ordinary way; SEAI and EU grants for the same work reduce the qualifying expenditure.
Illustrative example
Illustrative example. Three hypothetical companies. Barrow Analytics does not know whether a probabilistic matching algorithm can reconcile 20 million records across inconsistent schemas within a nightly batch window; it tests three approaches against a benchmark and records the results. Qualifies, with the benchmark records as evidence; the reporting dashboard is business application software. Blackwater Precision develops a machining process for a new titanium alloy, scrapping 50 test parts before surface finish was consistent. Qualifies; the subsequent fix of a spindle breakdown during production is excluded corrective action. Nore Foods reformulates a yoghurt to taste sweeter. Excluded, cosmetic. Its parallel project to extend shelf life to 45 days without preservatives, with microbiological testing at intervals, qualifies.
Related pages
Official sources
Educational content only, not tax advice. See the disclaimer.