Key takeaway: The SR&ED tax credit is Canada's largest R&D funding program, and the CRA allowed $4.6 billion in credits in fiscal year 2025-26 alone. A Canadian-controlled private corporation can get back up to 35% of eligible R&D spending, refundable, on as much as $6 million a year, which caps out at $2.1 million in a single claim. Most startups that qualify never realize it, because the program's name makes it sound like it's for people in lab coats. If your team has ever hit a technical wall and had to figure a way through it, you should read this before assuming it doesn't apply to you.
SR&ED (say it "shred") is a federal tax incentive that pays Canadian companies back for research and development work, and it's bigger than most founders assume. The CRA calls it "the largest Government of Canada program supporting research and development in Canada," and in fiscal 2025-26 it paid out $4.6 billion across 23,677 processed claims. This guide covers what the SR&ED tax credit actually is, who qualifies, what you can claim, how much comes back, and the mechanics of filing, so you can tell in ten minutes whether it's worth pursuing.
What the SR&ED tax credit actually is
The SR&ED tax credit is a federal program, administered by the CRA, that reduces your tax bill or pays you cash for R&D work carried out in Canada. It comes in two forms: investment tax credits (ITCs), which are the headline benefit and can be refundable or non-refundable depending on your corporate structure, and deductions against current and capital R&D expenditures. Most of what founders mean when they say "SR&ED" is the ITC.
The program isn't run through a grants office with an application deadline and a jury. It's a tax credit, claimed on your corporate return alongside your regular filing, which means there's no competitive selection process. If your work meets the eligibility test and you document it properly, you get the credit. Nobody is comparing your application against everyone else's this quarter and picking winners.
Who actually qualifies for SR&ED
Your work qualifies for SR&ED if it clears a two-part test: you were pursuing a scientific or technological advancement, and you faced real uncertainty you couldn't resolve with standard practice or publicly available knowledge. Per the CRA's eligibility guidance, that's the "why." The "how" is that you investigated it systematically, through experiment or analysis, rather than just building something and hoping it worked.
Here's the part that trips people up: the test is about the investigation, not the outcome. If your team tried an approach, it failed, and you learned something that shaped what you tried next, that work can still qualify. A failed experiment with a documented hypothesis and a documented result is often a stronger SR&ED claim than a feature that shipped cleanly on the first attempt, because the eligible part of SR&ED is specifically the uncertainty you worked through.
The CRA recognizes eight categories of support work that can count toward a claim: engineering, design, operations research, mathematical analysis, computer programming, data collection, testing, and psychological research. Software teams tend to live inside computer programming and testing, but a claim that only cites "we wrote code" won't clear the bar. What clears it is the specific uncertainty: an indexing approach that might not hold performance at scale, an integration whose failure modes weren't documented anywhere, an algorithm where the standard technique didn't fit your constraints.
Picture a team building an analytics dashboard that needs to aggregate billions of events in under a second. Nobody on the team knows whether the query approach they'd normally reach for will hold at that volume, so they try three different indexing strategies, two of which fail under load in ways the docs didn't predict, before the third one works. The feature itself, "an analytics dashboard," isn't SR&ED. The three-attempt investigation into whether sub-second aggregation was achievable at that scale is. The distinction is between building a thing and figuring out, through trial, whether a thing you don't yet know how to build is even possible.
Not everything you do is eligible, and it's worth being honest about that up front. The CRA specifically excludes market research, quality control or routine testing, social sciences research, prospecting for commercial resources, commercial production runs, and style changes. If your team's recent work was mostly UI polish, market validation interviews, or scaling infrastructure you already knew how to build, that work likely sits outside SR&ED even if it took real engineering effort. Effort and eligibility aren't the same thing; uncertainty is what the program is actually paying for.
What expenses you can claim
SR&ED expenditures fall into four categories: salaries and wages, materials consumed in the R&D, contract payments for R&D work done in Canada, and overhead. Salaries are usually the largest line for a software company, covering the time engineers spend on eligible projects, not their whole paycheque if only part of their work qualifies.
Overhead is where companies leave money unclaimed, mostly because tracking every eligible overhead cost individually is a pain. The CRA offers a shortcut: the prescribed proxy amount lets you claim 55% of your eligible salary base as a stand-in for overhead, instead of itemizing rent, utilities, and admin costs project by project. Most startups use the proxy method because it's simpler and the alternative, tracking actual overhead per project, rarely produces a materially different number for a small engineering team.
How much you can get back
A Canadian-controlled private corporation can get back up to 35% of eligible R&D spending, refundable, on up to $6 million of qualified expenditures a year, per the CRA's investment tax credit policy. Run the math on the full limit and that's $2.1 million in a single year, paid as cash even if you owe zero tax. Other corporations get a 15% non-refundable credit, and qualifying corporations can get 40% of that refunded; individuals and partnerships get the same 15% rate with 40% refundability.
Put a number on a mid-sized claim: a startup spending $500,000 on eligible salaries and overhead could see roughly $175,000 back federally at the 35% rate, before any provincial credit is added. Our SR&ED calculator will run your actual numbers, but that's the shape of it: a five-figure engineering investment turning into a six-figure refund, refundable even for a pre-revenue company with no tax payable.
A worked example of where the numbers come from
Say your engineering team spent $400,000 in salaries on eligible SR&ED work last year. Using the proxy method, you add 55% of that salary base as your overhead stand-in, per the prescribed proxy amount: $220,000. Add $30,000 in materials consumed during the R&D and you land at roughly $650,000 in qualified expenditures, comfortably under the $6 million CCPC limit. At 35%, refundable, that's about $227,500 back federally, before a provincial credit is layered on top. The salary line drives almost everything else, which is why accurate time allocation, not perfect bookkeeping, is the part worth getting right first.
The refundable part matters most for a pre-revenue company. A startup with no taxable income still gets the cash: the 35% credit on current expenditures is 100% refundable up to the $6 million limit, so a company burning cash pre-revenue collects the same $227,500 as a profitable one with the identical claim. That's the detail founders miss when they assume SR&ED is only useful once they're paying tax.
How provincial credits stack with the federal credit
Provincial R&D credits add to your SR&ED refund, but not by simple addition, and getting this wrong is one of the more common mistakes founders make when estimating their claim. Provincial credits count as government assistance under ITA s.127(18), which means they reduce the pool of expenditures your federal credit applies to. The federal 35% is calculated on what's left after the provincial credit, not on the original spend.
Take Ontario as an example: the Ontario Innovation Tax Credit is 8% refundable. The combined effective rate isn't 8% + 35% = 43%. It works out to roughly 8% + 35% × 92% ≈ 40.2%, because the federal rate applies to the 92% of spend left after the provincial credit reduces the base. Every province has a version of this math, and it always lands below the naive sum. We wrote up the full mechanics of the grind rule if you want the province-by-province numbers, and each provincial page under /sred-credits has the corrected math for that province specifically.
When and how you file
You file your SR&ED claim alongside your corporate tax return, using Form T661 plus Schedule T2SCH31 for a corporation, and the deadline is 18 months after your fiscal year end, with no extensions available under any circumstances. That's a big enough topic that it gets its own guide; the short version is that filing early, at the same time as your T2, gets your refund processed faster than waiting until the wall. If you want the line-by-line breakdown of what T661 actually asks for, we cover that separately too.
What happens after you file
Most SR&ED claims get paid without a fight. Per the CRA's most recent program statistics, 90% of claims filed in fiscal 2025-26 were accepted as filed, 6% were accepted after some modification, and 4% were denied. A review isn't an accusation; it's a reviewer asking you to show the evidence behind what you claimed, and the claims that survive are the ones where the documentation was written down when the work happened rather than reconstructed for the form. We've written up what a CRA review actually involves if you want to know what to expect before it happens to you.
Common misconceptions about SR&ED
"We're too small to qualify" is the most common one, and it's backwards. Program size doesn't scale with company size: a two-person engineering team hitting a genuine technical wall qualifies on the same terms as a two-hundred-person one. Size affects how much you can claim, not whether you can claim at all.
"We're not doing real R&D" usually means someone pictures a lab coat and a research grant. Software development, engineering challenges, and product work often qualify under the same test as any other field, because the eligibility bar is uncertainty and systematic investigation, not the industry you're in.
"It failed, so it doesn't count" is exactly backwards too. A documented failed approach, one where you had a real hypothesis and tested it, is evidence of the exact uncertainty the program exists to fund. Some of the strongest SR&ED narratives describe the thing that didn't work before the thing that did.
The one that's actually true, and worth taking seriously: documentation is the hard part. Reconstructing what your team tried eighteen months ago, from memory, at filing time, is where claims get thin or get abandoned entirely. That's a real obstacle, not a myth, and it's the reason tools exist to capture technical work as it happens instead of after the fact.
Who should skip this
If your recent work was market research, UI polish with no technical uncertainty behind it, straightforward scaling of infrastructure you already understood, or a style change to something that already worked, don't force it into a SR&ED claim. The CRA excludes exactly this kind of work, and a claim padded with ineligible activity is weaker than a smaller claim that's entirely solid. SR&ED rewards the specific stretches where your team didn't know how to solve something and had to find out.
Getting started
Getting started means tracking two things as you go: what your team is trying to do, and where it turned out to be harder than expected. Waiting until tax season to reconstruct that story from commit messages and half-remembered Slack threads is the single biggest reason companies under-claim or skip SR&ED entirely.
That's the problem Glauq is built to solve: it captures technical evidence continuously from the tools your team already uses (GitHub, Jira, Slack), so the narrative is built from records made when the work happened. A qualified, independent SR&ED expert still reviews every claim before it's filed and stands behind it if the CRA has questions; the automation handles the capture, the named expert handles the judgment call. Beyond that, the mechanics are the same whether you use software or not: track the work, note the technical uncertainty in real time, and file with your T2 rather than waiting for the deadline to force the issue.
Frequently asked questions
How much SR&ED credit can a Canadian startup get back? A Canadian-controlled private corporation can claim a refundable federal credit of up to 35% on its first $6 million of eligible expenditures, per the CRA's investment tax credit policy. A startup spending $500,000 on eligible R&D could see roughly $175,000 back federally, before provincial credits are added on top.
Do I need a research lab to qualify for SR&ED? No. Software development, engineering challenges, and product innovation often qualify under the same eligibility test as any other industry. What matters is whether you faced genuine technological uncertainty and investigated it systematically, per the CRA's eligibility guidance, not whether you work in a lab.
What expenses can be claimed under SR&ED? Four categories: salaries and wages for employees engaged in eligible R&D, materials consumed during that work, contract payments for R&D performed in Canada, and overhead, which most companies claim using the 55% prescribed proxy amount instead of itemizing actual costs.
Is my company too small to claim SR&ED? No, size doesn't determine eligibility. A small team hitting a real technical wall qualifies on the same test as a large one. The program is Canada's largest R&D support program, with $4.6 billion in credits allowed in fiscal 2025-26, and it's built for companies of every size.
Does a failed project still qualify for SR&ED? Yes. The eligibility test is about the investigation, not whether the outcome succeeded. A documented approach that didn't work, tested against a real hypothesis, is evidence of the technical uncertainty the program is designed to fund, not a reason to leave that work off your claim.
When is my SR&ED claim due? 18 months after your fiscal year end, with no extensions under any circumstances. The full deadline mechanics, including how the date is calculated for corporations, individuals, and trusts, are worth reading before you assume you have more runway than you do.
SR&ED isn't a grant you compete for or a program reserved for people in lab coats. It's a tax credit that pays back real, uncertain technical work, and most companies that qualify never file because nobody told them the bar was this ordinary.
See what your claim could be worth — estimate your refund or check your eligibility.