Technological uncertainty is the starting point of every SR&ED claim. Get this concept wrong and the rest of the claim — systematic investigation, technological advancement — doesn’t hold together. Get it right, and it becomes much easier to see which of your projects actually qualify.
The CRA Definition
According to CRA guidance, technological uncertainty exists when a competent professional in the field cannot determine, in advance, whether a particular approach will work, what the outcome will be, or how to achieve a desired result using existing knowledge, techniques, and standard practice.
The key phrase is “cannot determine in advance.” It’s not about whether the work was hard, expensive, or time-consuming — it’s about whether the answer was genuinely unknown until you tested it.
Uncertainty vs. Difficulty
A project can be difficult without being technologically uncertain. Difficult but well-understood work — applying documented engineering methods to a known problem, however complex — is not SR&ED-eligible on its own. Uncertain work is where existing knowledge runs out and your team has to generate new understanding to move forward.
Signs technological uncertainty is present
- No published method, textbook approach, or vendor solution addresses your specific combination of requirements
- Multiple technically sound approaches exist and it isn’t clear which (if any) will work
- Your team can’t predict the outcome of a design or process change without testing it
- Existing tools or materials behave unpredictably outside their documented operating range
Signs it’s likely routine work instead
- A vendor manual, standard, or established method already tells you how to do this
- The main challenge is time, budget, or coordination rather than technical unknowns
- You’re applying a known solution to a new customer or context without adapting the underlying approach
Documenting Uncertainty as It Happens
The strongest evidence of technological uncertainty is written down before the outcome is known — a design note asking “will this scale past X?”, a ticket describing an unpredictable failure, a hypothesis about why an approach might work. Reconstructing this after the fact is possible but weaker; capturing it in real time is what CRA reviewers respond to best.





