SR&ED Basics: How a Claim Actually Works

What SR&ED is

The Scientific Research & Experimental Development program is Canada's largest R&D incentive — several billion dollars a year, delivered as investment tax credits on eligible R&D spending. For a Canadian-controlled private corporation (CCPC), an enhanced federal rate may apply to a limited qualified-expenditure pool. The base ceiling is generally $3 million for older tax years and $6 million for tax years beginning on or after December 16, 2024, with short-year proration and claimant-specific association, taxable-capital, eligibility, and refundability rules. Provinces and territories may offer separate credits under their own rules.

Five prompts that can help you prepare

These optional prompts can help you organize a project discussion before working through CRA's eligibility guidance with your preparer. They are an internal preparation aid, not CRA's eligibility test or a checklist that decides whether work qualifies. A "yes" to every prompt does not establish eligibility, and a "no" does not replace a fact-specific review of the actual work:

1. Was there scientific or technological uncertainty?

Something you could not resolve with standard practice or publicly available knowledge. Business uncertainty ("will customers buy this?") does not establish this criterion — the uncertainty must be scientific or technological ("can this be done at this latency/scale/accuracy at all?").

2. Did you formulate hypotheses aimed at reducing that uncertainty?

Testable propositions formed before the work: "We hypothesized that X approach would eliminate Y failure mode." A record of the question, test, observation, and conclusion makes the investigation easier to explain and verify.

3. Was the approach a systematic investigation?

Designed experiments, measurements, analysis, conclusions — and iteration. Failed and inconclusive experiments can be important evidence that the outcome was genuinely uncertain.

4. Was a scientific or technological advancement achieved (or attempted)?

New knowledge or capability — not the product you shipped, but what you learned that was not previously known or available. The work need not succeed commercially; attempted advancement can include learning why an approach does not work.

5. Was a record of the hypotheses and results kept as the work progressed?

Contemporaneous evidence — commits, experiment logs, issues, technical discussions, test results, and other records created while the work happened. Later explanations can add context but should not be presented as contemporaneous records.

Certain categories of work are excluded from SR&ED, including market research, routine testing and quality control, style or cosmetic changes, routine data collection, and commercial production. Work directly supporting eligible SR&ED can require a more specific analysis, so have the preparer assess the actual activities.

What you actually file

• Form T661— the SR&ED expenditure claim. Part 2 contains project information; Section B contains the technical descriptions (line 242: uncertainties, maximum 350 words; line 244: work done, maximum 700 words; line 246: advancement, maximum 350 words). These are maximums, not targets or minimums: use only the words needed to describe the work accurately and do not add filler. Part 2 Sections A and C capture other project information, while Parts 1 and 3–10 cover the remaining claimant, calculation, preparer, and certification information; use the current form and guide.
• The applicable ITC form — corporations generally use T2 Schedule 31; individuals use Form T2038(IND). Partnerships have additional partnership-return and member-allocation requirements.
• Provincial schedules where applicable.

SR&ED Copilot organizes preparation inputs, evidence, draft Part 2 Section B technical descriptions, and selected expenditure facts. It does not complete or submit the claimant's return. The preparer must choose the applicable forms, reconcile the figures, and file them with the correct return.

The reporting deadline that matters

The SR&ED reporting deadline is generally 12 months after the filing due date for the claimant's income-tax return. For corporations, that commonly produces a date 18 months after tax year-end. For an individual carrying on a business with a December 31 year-end, the common reporting date is June 15 in the second following calendar year. Partnership timing depends on member facts and the partnership information return. Confirm the exact claimant-specific date rather than applying the corporate rule to everyone.

See CRA's SR&ED Filing Requirements Policy.

The grant trap: government assistance reduces your claim

Government and non-government assistance can reduce the expenditure pool used for SR&ED calculations, but the treatment depends on the assistance, the recipient, the related expenditure, and timing. Do not assume a grant and an SR&ED estimate can simply be added together. Record the assistance separately and have the preparer determine the applicable reduction or allocation.

An illustrative federal ITC calculation

Rough math for a BC CCPC using the proxy method: one developer spending half their $100k salary on eligible R&D → $50k wages + $27.5k proxy overhead = $77.5k planning pool → roughly $27.1k at an illustrative 35% federal ratebefore any assistance, expenditure-limit grind, association adjustment, or other claimant-specific rule. The dashboard can show a federal planning estimate only after the filing workspace confirms exact tax-year dates and CCPC status. It does not calculate provincial or territorial credits; have the claim preparer verify both the qualified pool and every applicable rate.

Official sources

• CRA: SR&ED Tax Incentive Program — the program home page.
• CRA: Guidelines on the eligibility of work — use this official guidance for the fact-specific eligibility analysis; it also informed the preparation prompts above.
• Form T661 and its guide — read Part 2 before you write a word.
• CRA Guide T4088 — current filing, partnership, evidence, and expenditure guidance.