SR&ED Tax Credits for Canadian Small Businesses in 2026: Complete Guide to the Scientific Research and Experimental Development Program

Canada’s SR&ED program is one of the most generous R&D incentives in the world. CCPCs can receive a 35% refundable federal tax credit on qualifying R&D expenditures — even a company with no tax payable receives a cash refund. Combined with Ontario’s additional 8% OITC, qualifying Ontario CCPCs can recover up to 43 cents of every qualifying dollar spent on R&D.

What qualifies as SR&ED work for the federal tax credit?

Qualifying SR&ED work falls into three categories: (1) Basic research — advancing scientific knowledge without a specific commercial application; (2) Applied research — advancing scientific knowledge for a specific practical application; and (3) Experimental development — achieving technological advancement by resolving a technological uncertainty. The key test for experimental development: did your team face a technological problem that existing knowledge could not solve, and did you conduct systematic investigation to resolve it?

What SR&ED expenditures are eligible for the tax credit?

Eligible expenditures include: salaries and wages of employees directly engaged in SR&ED; materials consumed in experiments; arm’s length contractor fees at 80% of amounts paid; lease costs of SR&ED equipment; and overhead under either the traditional method or the proxy method (55% of direct SR&ED labour). Capital expenditures on SR&ED equipment are no longer directly eligible for ITC — they generate a CCA deduction instead.

What is the 18-month filing deadline for SR&ED claims?

Form T661 must be filed within 18 months after the end of the taxation year in which qualifying work was performed. This is a hard deadline — no discretion to extend. For a December 31, 2024 year-end, the T661 must be filed by June 30, 2026. Missing the deadline results in permanent loss of the credit for that year. The T661 is filed with the T2; if the T2 is filed late but within 18 months with T661 included, the SR&ED claim is still valid.

How does the $3 million SR&ED expenditure limit work for CCPCs?

The 35% refundable ITC rate applies to qualifying SR&ED expenditures up to $3 million. Expenditures above $3 million earn a 15% non-refundable credit. The $3 million limit is phased out when a CCPC had prior-year taxable income between $500,000 and $800,000, or taxable capital between $10 million and $50 million.

Can start-ups with no revenue claim SR&ED credits?

Yes — this is one of the most valuable features of the CCPC SR&ED program. Because credits are refundable for CCPCs (up to $3 million), a company with zero revenue and zero tax payable still receives a cash refund equal to 35% of qualifying expenditures (plus 8% Ontario OITC). Many early-stage technology companies rely on SR&ED refunds as a primary source of non-dilutive funding in their first 2–3 years.

Reviewed by: Bader A. Chowdry, CPA CA LPA — Insight Accounting CPA Professional Corporation, Mississauga, Ontario. Last reviewed: June 6, 2026.