SR&ED Tax Credits: A Practical Eligibility and Claim Guide for Canadian Companies

Scientific Research and Experimental Development — SR&ED, pronounced "shred" in accounting circles — is Canada's largest federal R&D tax incentive program, providing billions of dollars of support to Canadian businesses annually. This guide walks founders, CFOs, and controllers through what qualifies, how to structure a claim, and what to watch out for.

What Is SR&ED?

SR&ED is a federal tax incentive program administered by the Canada Revenue Agency (CRA). It allows Canadian businesses to recover a portion of their eligible R&D expenditures through Investment Tax Credits (ITCs), which can be used to reduce taxes payable or, in some cases, received as a cash refund.

The program covers three types of eligible work:

• Basic research — work to advance scientific knowledge without a specific application in mind.
• Applied research — work to advance scientific knowledge with a specific practical application in view.
• Experimental development — work to achieve technological advancement for the purpose of creating new, or improving existing, materials, devices, products, or processes.

For most technology and product companies, experimental development is the most relevant category. If your team is writing code, engineering hardware, or iterating on formulations to overcome a technical obstacle, you're likely in scope.

Who Qualifies?

SR&ED is available to eligible claimants that conduct qualifying work in Canada and incur eligible expenditures, including corporations and certain other claimants such as individuals, trusts, and partnerships.

What Expenditures Are Eligible?

Labour

This is typically the largest component of any SR&ED claim. Eligible labour includes salaries and wages paid to employees directly engaged in, or directly supporting, SR&ED work — engineers, developers, scientists, and lab technicians. Managers and supervisors can be included to the extent they directly supervise SR&ED work.

Materials and Capital

Raw materials consumed or transformed in the SR&ED process are eligible. For capital costs, the rules changed significantly for amounts incurred after December 15, 2024: certain eligible lease costs for equipment and certain capital expenditures can now be claimed as SR&ED expenditures — a meaningful expansion from the prior regime. Confirm treatment with your SR&ED advisor based on the specific nature of the property and expenditure.

Contracts

Payments to arm's-length third parties for SR&ED work performed on your behalf are 80% eligible. Payments to non-arm's-length parties (related companies or individuals) are eligible at cost.

Overhead — Traditional vs. Proxy Method

Companies can choose between two methods for calculating overhead:

• Traditional method: Claim actual overhead costs directly attributable to SR&ED (utilities, rent for lab space, etc.).
• Proxy method: Claim a flat 55% of eligible labour as a proxy for overhead. Most companies choose this — it's simpler and often more generous.

Does Your Work Qualify? The Eligibility Test

This is where most claims succeed or fail. The CRA evaluates two fundamental requirements: the work must be aimed at achieving technological advancement, and it must be carried out through systematic investigation or search by experiment or analysis.

1. Scientific or technological uncertainty
There must be a genuine uncertainty that cannot be resolved through routine engineering or standard practice. The uncertainty must be one that a competent professional in the field could not resolve without experimentation.

2. Scientific or technological content
The work must involve applying principles of a hard science. For software, this means advancing the underlying technology — not simply applying known techniques to a new business problem.

3. Scientific or technological advancement
The work must be aimed at generating new knowledge or a new capability — something beyond what was publicly known at the time.

4. Systematic investigation
The work must follow a methodical approach: hypothesis, testing, observation, and iteration. Ad hoc problem-solving, even if technically complex, is not SR&ED.

What Does NOT Qualify

• Market research, sales promotion, or quality control testing
• Routine data collection
• Social science or humanities research
• Style changes or cosmetic modifications
• Commercial production of a new or improved material, product, or process

The most frequent issue for software companies: work that applies existing techniques to new data or a new business domain. If a competent developer could have done it without experimentation — it is likely not SR&ED.

How to File a Claim

SR&ED claims are filed as part of your corporate income tax return (T2) using:

• T661 — Scientific Research and Experimental Development (SR&ED) Expenditures Claim
• Schedule 31 (T2 Schedule 31) — Investment Tax Credit — Corporations

The filing deadline is 12 months after the T2 filing due date for the taxation year in which the SR&ED was conducted. Missing this deadline means forfeiting the claim for that year — with no extension available.

What to Document

Strong documentation is the foundation of a defensible claim. For each project, maintain:

• Project descriptions explaining the technological uncertainty and the work undertaken
• Evidence of your systematic approach: design documents, testing logs, iteration records
• Time records for employees engaged in eligible work
• Records of materials consumed
• Payroll records and T4 summaries

Documentation should be prepared contemporaneously rather than reconstructed at year-end. After-the-fact narratives are consistently weaker than records prepared in real time.

What to Expect in a CRA Review

The CRA reviews a portion of SR&ED claims each year. Reviews involve a technical officer (who assesses eligibility) and a financial reviewer (who verifies expenditures).

The most common reasons claims are reduced or disallowed:

• Inadequate technical descriptions that fail to articulate the uncertainty
• No contemporaneous documentation
• Labour claims that include time for routine development rather than SR&ED work
• Overly broad project definitions that mix eligible and ineligible activities

A Note on Provincial Credits

Federal SR&ED is the starting point, but provincial credits can add significantly to the total benefit. Ontario, Quebec, BC, and Alberta all offer supplementary programs with different mechanics and rates.

The Role of Your Finance Team

SR&ED is not just a tax filing exercise — it's a year-round financial discipline. The most successful claimants treat it as an ongoing process:

• Finance tracks eligible labour in real time, tagged by project
• Engineering leads maintain contemporaneous records of technical challenges and iterations
• Controllers ensure that material costs and contractor payments are captured and categorized
• The year-end filing is then a consolidation of clean, well-organized data — not a frantic reconstruction

For growth-stage companies with meaningful R&D activity, this kind of embedded SR&ED readiness can translate into significant recovered cash — capital that stays in the business and funds the next cycle of development.