Does Your Trades Business Qualify for SR&ED?

Most Ontario trades businesses that ask us about SR&ED don’t qualify. That’s worth saying before any of the detail. SR&ED (Scientific Research and Experimental Development) is the federal government’s largest R&D tax incentive by dollar volume, well funded, and run year-round by the Canada Revenue Agency. It’s also one of the most misunderstood programmes in Canadian small business, and the misunderstanding always runs the same way. Owners assume the bar is “we did something technically hard.” CRA’s bar is narrower and more specific than that.

Below is the eligibility test as CRA writes it, taken from their own SR&ED eligibility guidance, checked 2026-08-28, with trades examples on both sides of the line.

The three-part test CRA applies

CRA’s own eligibility page sets out three criteria that work together, and passing one on its own gets you nothing:

1. Technological uncertainty. Existing knowledge has to leave it unknown whether a given result can be reached at all, or how to reach it. “We weren’t sure it would work the first time we tried it” doesn’t get you there. The answer has to have been unavailable in advance from published science, standard engineering practice, and your own professional experience, so you had to go and find it out.

2. Systematic investigation. CRA describes a four-step process: define a problem, form a hypothesis about how to resolve it, plan and test that hypothesis through experiment or analysis, then draw conclusions from what comes back. That looks like an engineering R&D team’s paperwork, and nothing like how a job site runs. One useful part of it: a hypothesis that turns out wrong still counts. A failed experiment that produced new understanding stays eligible, because CRA’s own test asks for a systematic process.

3. Technological advancement. The work has to produce new knowledge that pushes scientific or technological understanding forward, even in a narrow, specific way. A small addition to the field still counts, as long as it’s new, meaning the knowledge didn’t already exist and wasn’t readily available before you did the work.

All three at once. Hard work with a predictable outcome fails on the first count. If real uncertainty got sorted out by trial and error with nothing written down, the second count kills it. And a project that was both uncertain and systematic still fails the third if all it produced was a result useful to one business, with nothing added to the underlying technical knowledge.

What CRA explicitly says does not qualify

CRA’s own guidance names categories of work that are out, however skilled or valuable the work is:

• Routine engineering or standard practice, including applying known techniques or existing knowledge to a new situation
• Routine quality control and testing
• Market research and sales promotion
• Style changes, and routine data collection
• Commercial production and normal business operations
• Training staff or on-the-job learning
• Hiring an expert to apply knowledge that already exists
• Buying proprietary knowledge or technology that already exists elsewhere

Hold that list against a normal week in a trades business. Installing a manufacturer’s system to its documented specifications is routine practice. A hard fault diagnosed with standard procedure counts as applying existing knowledge. Training a technician on a new tool appears on the excluded list by name. Wire a database, a scheduling library, and a payment processor’s API into a piece of internal software, and however well you do it, you’ve combined known techniques without advancing the technology.

Where the line sits, in trades terms

Not eligible, almost always:

• Installing HVAC, fire-safety, electrical, or plumbing equipment to spec, complex jobs included, and equipment that has only just reached the Canadian market
• Diagnosing and repairing equipment faults with known diagnostic methods, however long that skill took to build
• Adopting new field-service or scheduling software, including software built for your business alone, where it combines existing, well-understood components in a new arrangement
• Training staff on new tools, codes, or procedures
• Modifying a standard installation to suit an unusual building, where the modification draws on known trade knowledge

Possibly eligible, case by case, and only with real technical uncertainty and the paperwork to show it:

• Developing a new method, material, or process whose outcome existing engineering knowledge could not predict, then testing it through a documented, structured process
• Building software or a control system for a problem that existing tools and known techniques cannot solve, where the development itself took systematic experimentation to find out whether it could be done at all, and how
• Adapting a technology to a use case so far outside its documented specifications that making it work demanded new technical knowledge, beyond trial and error inside known parameters

The second list is narrow on purpose. A small number of trades and adjacent businesses live there, usually the ones doing product development, custom equipment design, or first-of-its-kind process engineering. Day-to-day trades work sits on the first list, however skilled the hands doing it.

Why this matters before you pay anyone

Preparing an SR&ED claim is a paid service, and some firms take a cut of the eventual credit instead of a fee. Under that arrangement a firm carries a limited downside on a weak claim and a real upside on an approved one, which nudges them toward encouraging claims that fit the criteria above poorly. We’re not accusing any particular firm of anything. It’s a structural incentive worth understanding before you sign. Run the three-part test against your own business first, and be honest doing it. If nothing on your job sites in the last year involved technical uncertainty you couldn’t have resolved from what was already known, worked through with a structured process, SR&ED isn’t your programme this year. A consultant’s enthusiasm won’t change that.

If a project of yours does look like the second list, take it to an accountant or an SR&ED preparer who works with CRA’s criteria week in and week out. A general guide like this one can’t make that call for you. Before that call, read the companion guide, What a Grant Application Asks You For Before You Start. SR&ED asks for a lot of documentation, and you want the size of that job clear before you start.