SR&ED is a federal investment tax credit (ITC) program administered by the CRA. It rewards Canadian businesses that carry out systematic experimental development or research to resolve genuine technological uncertainty.
Canadian-controlled private corporations (CCPCs) can access an enhanced, refundable credit on qualifying expenditure up to an annual limit, which is why the program is especially valuable for pre-profit and scaling companies. Other corporations and claimants generally receive a lower, non-refundable rate.
Most provinces layer their own R&D credits on top of the federal ITC, so a well-built claim usually stacks federal and provincial support.
Who qualifies
- Corporations, partnerships, and individuals carrying on business in Canada that perform eligible work in Canada.
- CCPCs benefit most through the enhanced refundable rate up to the annual expenditure limit.
- Companies in software, manufacturing, life sciences, cleantech, and engineering are frequent claimants, but eligibility is activity-based, not sector-based.
Eligible activities
- Experimental development to achieve technological advancement by resolving technological uncertainty.
- Applied and basic research.
- Supporting work (engineering, design, testing, data collection) directly in support of eligible R&D.
- Eligible costs typically include Canadian salaries and wages, materials consumed, and some contractor costs; the proxy method simplifies overhead.
Typically not eligible
- Routine engineering or routine software development with no technological uncertainty.
- Style changes, market research, sales promotion, and quality control.
- Commercial production and routine data collection.
- Work performed outside Canada (with limited exceptions).
How a claim works
- 1
Identify eligible projects
Map each project to the technological uncertainty it set out to resolve and the systematic investigation used.
- 2
Capture contemporaneous evidence
Keep project notes, experiment logs, version history, and time records created as the work happens.
- 3
Cost the claim
Compile eligible salaries, materials, and contractor costs, and choose the proxy or traditional overhead method.
- 4
File Form T661 on time
Submit T661 with the T2 return within the SR&ED reporting deadline; late claims are generally denied.
- 5
Support any CRA review
Be ready to substantiate technological uncertainty, the work performed, and the expenditures claimed.
What to document
- Dated technical narratives describing the uncertainty, hypotheses, and results.
- Time tracking allocating staff effort to eligible work.
- Source control history, test logs, prototypes, and design records.
- Payroll, invoices, and contracts supporting claimed expenditures.
Common pitfalls
- Missing the strict reporting deadline and forfeiting the entire claim.
- Describing the outcome rather than the technological uncertainty and the systematic work to resolve it.
- Claiming routine development as experimental development.
- Reconstructing evidence after the fact instead of keeping contemporaneous records.
Questions to ask an advisor
- “How do you document technological uncertainty and defend it under CRA review?”
- “What is your fee model, and is any part of it contingent on the refund?”
- “Who prepares the technical narrative: a tax specialist or an engineer or scientist?”
- “What is your track record responding to CRA queries and audits?”
Frequently asked
Is SR&ED refundable?
The enhanced federal credit is refundable for eligible CCPCs up to the expenditure limit; the base rate is largely non-refundable. Confirm current rates and limits with the CRA.
What is the SR&ED filing deadline?
Form T661 is generally due within 12 months of your income tax filing due date. The deadline is strict, and late claims are typically denied.
Do provinces add to the federal credit?
Most provinces offer their own R&D tax credits that stack on the federal ITC, so total support depends on where the work is performed.
Index frameworks
Canon rows are the primary Index baseline for this jurisdiction. Other versions are retained for audit trails and migration notes.
Credit Index: SR&ED narrative & costing core
Index canonv2026.1The Index baseline for SR&ED technical and financial documentation alignment.
Legislation snapshots
Year-stamped summaries for orientation; always verify against primary sources.
2026
SR&ED framework snapshot 2026
Documentation expectations and proxy rates updated annually for the Index library.
2025
SR&ED framework snapshot 2025
Documentation expectations and proxy rates updated annually for the Index library.
2024
SR&ED framework snapshot 2024
Documentation expectations and proxy rates updated annually for the Index library.