SR&ED Tax Credits for Toronto Businesses Explained

The SR&ED program is a federal tax incentive that pays businesses back part of what they spend on qualifying research and development in Canada. For a Toronto company that is a Canadian-controlled private corporation, the enhanced credit is 35% of qualified expenditures up to a limit, and it is refundable. The Canada Revenue Agency (CRA) runs the program, and the claim goes in with your income tax return.

That sounds generous, and it can be. But the program has strict tests, a paperwork load that surprises first-time claimants, and a hard filing window. This article walks through how the credit works, who can claim it, what the numbers look like with real arithmetic and where the deadlines sit.

Work that qualifies

Being in a technical field is not enough. The claim has to be tied to specific work, and the work has to meet three tests set out on the CRA site. Miss one and the work is out, no matter how hard it was.

The first test is scientific or technological advancement. The work must aim to generate or discover knowledge that advances the understanding of science or technology. Making a product a little better for your customers is a business result. Learning something the field did not already know is the kind of result the program wants.

The second is scientific or technological uncertainty. It exists when you cannot tell whether a result can be achieved, or how to achieve it, because the available knowledge falls short. If a competent professional could look up the answer, there was no uncertainty in the program’s sense.

The third is systematic investigation. The CRA describes this as a search carried out in a field of science or technology by experiment or analysis. That means defining a problem, forming a hypothesis, planning and testing it, and drawing logical conclusions from the results. Random tinkering does not count, even when it eventually works.

A practical way to read all three at once: could you show a reviewer, on paper, what you didn’t know at the start, what you tried, what happened and what you learned? If yes, you probably have a claim worth preparing. If the honest answer is that you used known methods and the work went as planned, the CRA is unlikely to accept it.

The rates and where the limit sits

Every eligible claimant can earn a basic ITC of 15% on qualified SR&ED expenditures. Canadian-controlled private corporations (CCPCs) can earn an enhanced 35% on qualified expenditures up to their expenditure limit. Eligible Canadian public corporations gained access to the enhanced rate for tax years beginning after December 15, 2024.

The limit changed with that same date. For tax years that began before December 16, 2024, the maximum was $3 million. For tax years beginning after December 15, 2024, it is $6 million for most CCPCs and for eligible Canadian public corporations.

There is also a size test based on taxable capital employed in Canada. For the newer rules, the limit starts to shrink once taxable capital reaches $15 million and disappears at $75 million. Under the older rules, the reduction began at $10 million and ended at $50 million. A very large corporation, then, may earn only the basic 15%.

The CRA says the ITC earned at the 35% rate on current expenditures is fully refundable for qualifying corporations, up to the limit. Individuals are treated differently. An individual can get 40% of the ITC earned at 15% back as a refund. Credits that cannot be used right away can be carried back up to 3 tax years or forward up to 20 tax years.

A worked example with real arithmetic

Take a small Toronto CCPC with $500,000 of qualified SR&ED expenditures in a tax year that begins after December 15, 2024. That is well under the $6 million limit. The ITC is 35% of $500,000, which is $175,000. Because the credit is refundable at that rate, the corporation can receive it in cash even if it owes no tax that year.

Now a larger case. A CCPC has $8 million of qualified expenditures and a full $6 million limit. On the first $6 million the credit is 35%, or $2,100,000. Beyond that, $2 million earns 15%, which is $300,000. Add them up and the ITC is $2,400,000, but only the enhanced part is refundable. That $300,000 can lower tax owing, or it can be carried back or forward.

Notice how much the limit matters. Without it, all $8 million at 35% would be $2,800,000. The cap costs this company $400,000 of credit compared with that figure, which is why the $6 million threshold is the number growing firms watch.

These figures assume every dollar is a qualified expenditure. In practice the number that goes into the calculation is the qualified expenditure figure from your Form T661, and that can be lower than what you spent on the project. The next section shows why.

How each kind of cost is treated

The CRA’s T4088 guide sets a rule for each cost. Salary counts for employees directly engaged in SR&ED done in Canada, and for specified employees it is capped at five times the year’s maximum pensionable earnings, which is $373,000 using the 2026 figure of $74,600.

Materials count when consumed or transformed in the work. For arm’s length contractors, 80% of the payment earns the ITC, so a $100,000 invoice adds $80,000. Overhead can be traced directly or claimed by the proxy method, which the guide sets at 55% of the salary base.

An illustration: $300,000 of salaries, $20,000 of materials, a $50,000 arm’s length lab bill (80% is $40,000) and proxy overhead of $165,000 make a base of $525,000. At 35%, the credit is $183,750. Real claims involve more adjustments, so work yours through on the form. The income tax calculator shows what owner salary does to a personal bill.

Form T661 and the rest of the paperwork

Form T661 is where you describe the work project by project and report the spending. The CRA says it produces three amounts: allowable expenditures, the pool of deductible expenditures and qualified SR&ED expenditures.

Part 2 asks three questions per project, each with a word limit. Uncertainties go on line 242 (350 words), work performed on line 244 (700 words) and advancements on line 246 (350 words). Name the technical problem, say what was uncertain and describe what you did to find out.

A corporation files the form with its T2 return and Schedule 31, where the credit is calculated. Individuals use Form T2038(IND). Supporting documents are kept on file and not sent in at first. Partnerships must claim the whole deductible pool in the year of spending.

Grouping your work into projects

Before you fill in a line, decide what a project is. The CRA defines an SR&ED project as a set of interrelated activities that together achieve, or try to achieve, a scientific or technological advancement.

List the tasks tied to the advancement. Add eligible support work such as engineering, design, programming and testing. Take out marketing, quality control and commercial production. Then name the project and give it dates.

A project ends when new knowledge is gained, whether or not you reached your goal, so a failed experiment can still count. Only costs incurred in the tax year you file for go on that year’s claim.

What happens after you file

The CRA says a claim will generally be processed within 60 calendar days of receiving your completed claim and your income tax return. If it is picked for review, a research and technology advisor checks eligibility and a financial reviewer checks the costs.

Refundable claims chosen for review are generally completed within 180 calendar days. Claims chosen for an expenditure review take about 90. These are service standards, not guarantees, so leave some slack in your cash flow.

Asking for approval before you spend

Since April 1, 2026, eligible businesses can apply for pre-claim approval. The CRA says it is open to Canadian-controlled private corporations, Canadian corporations and Canadian partnerships with annual gross income under $25 million, for up to three projects.

You request a case number, which arrives in two to five business days, then upload supporting documents through My Business Account. The CRA decides within eight weeks, and approval is valid for up to three years. For approved projects that need an expenditure review, processing drops from 180 days to 90.

Deadlines you cannot miss

A corporation has 18 months from the end of the tax year to file an SR&ED claim. For a December 31, 2026 year-end, that is June 30, 2028. Individuals and partnerships have different windows, listed in the guide. Self-employed claimants can also check ordinary tax with the self-employed tax calculator.

Records to gather before you write anything

A claim is only as strong as the paper behind it. The burden of showing that the work happened and cost what you say is on the claimant. Start collecting records while the project is live, since memory fades fast once a team moves on.

Useful records fall into two groups. Some show the technical work. Others show the money.

• Project notes, design documents, test plans and results, and version history that show what you tried and what you learned.
• Payroll records tied to the people who did the work, and time records showing how much of their time went to SR&ED.
• Invoices for materials used up in the work, and contracts and invoices for outside contractors.

Time records deserve special care. A general statement that a developer spent most of the year on research does not hold up well. Weekly or monthly allocations, written near the time, are far easier to defend. Related tools: the Marginal Tax Rate & Tax Brackets calculator, plus all our tax calculators.

Sources

• CRA: Scientific Research and Experimental Development (SR&ED) tax incentives
• CRA: Get an investment tax credit (ITC)
• CRA: Describe work and report expenditures with Form T661
• CRA: T4088 Guide to Form T661
• CRA: What work is eligible
• CRA: After you claim
• CRA: How to apply for pre-claim approval
• CRA: Group work into eligible SR&ED projects

Common questions

Last reviewed: September 29, 2026. Figures come from the official sources listed above. How we check the numbers and our editorial policy.