IRAP CTAS 2026: The Complete Guide to Canada's Cleantech R&D Funding Stream

The Clean Technology Assistance Stream — CTAS — is the federal government's answer to a question Canadian cleantech founders have been asking for two years: where does the SDTC money go now? Following the suspension of Sustainable Development Technology Canada in late 2023, the publication of the Auditor General's findings in June 2024, and the consolidation decision that came with them, the federal cleantech R&D mandate has been folded into NRC IRAP and delivered through the same Industrial Technology Advisor (ITA) model that has run the program for decades. For founders who knew SDTC well, what changed is the delivery vehicle, not the policy intent. For founders who have only ever worked with IRAP, what changed is that the program now runs a dedicated cleantech stream with its own evaluation lens, its own technical advisors, and a portfolio that has absorbed the SDTC mandate. This guide covers what CTAS actually is in 2026, how the SDTC transition unfolded, what carries over from standard IRAP and what doesn't, who qualifies, how the application flow runs, and how to stack CTAS with SR&ED and the federal Clean Technology Investment Tax Credit without double-counting government assistance.

What IRAP CTAS is — and what it isn't

IRAP CTAS is a dedicated stream within NRC IRAP focused on Canadian SMEs developing clean technologies through to commercialization. It uses IRAP's standard delivery architecture — ITAs, cost-shared contributions, contribution agreements, milestone-based reimbursement — but applies a cleantech-specific evaluation lens. The technical and commercial questions an ITA asks of a CTAS file are weighted toward environmental impact, the credibility of the GHG, water, or waste outcomes, and the realism of the path from prototype to scale.

What CTAS is not is a re-creation of SDTC. SDTC was a Crown-controlled foundation with its own board, its own funding decisions, and a contribution model that historically supported larger, longer demonstration projects than IRAP typically writes. CTAS is delivered through IRAP, which means its sizing, cost-share ranges, eligible cost categories, and decision cadence follow IRAP norms rather than the older SDTC norms. Founders coming from the SDTC world should expect a smaller average ticket per project, tighter eligible-cost definitions on the cost side, and an ITA-led shaping process that looks nothing like submitting a Statement of Interest to SDTC.

How the SDTC mandate was absorbed — the June 2024 policy decision

The sequence of events matters because it explains why the program looks the way it does today. The publicly reported timeline runs roughly as follows.

In late 2023, the Government of Canada suspended SDTC from approving new funding decisions following a third-party investigation that surfaced governance and conflict-of-interest concerns. The President and CEO of SDTC resigned in November 2023. In June 2024, the Auditor General of Canada published an audit of SDTC's operations covering the prior period, which found ineligible projects and conflict-of-interest concerns in a meaningful share of the files reviewed and assigned responsibility for inadequate monitoring to Innovation, Science and Economic Development Canada (ISED). Around the same time, the Minister of Innovation, Science and Industry announced that SDTC programming would transition to NRC, with enhanced oversight and integration into IRAP's existing delivery model.

Through late 2024 and into 2025, the transition was executed: SDTC's existing funded portfolio — the active contribution agreements with cleantech companies that pre-dated the suspension — was transferred to NRC's administration. New cleantech applicants were directed to IRAP. The program publicly reopened to new cleantech applications under the IRAP banner, with the Clean Technology stream operating alongside IRAP's core program and its newer Defence and AI streams.

The decision to consolidate cleantech under IRAP rather than rebuild a standalone cleantech vehicle reflects a few things. IRAP already had the delivery infrastructure — ITAs in every region, a contribution agreement template, a financial monitoring function, a long track record on conflict-of-interest screening. Building a parallel cleantech agency from scratch would have been slower and would have repeated organisational risk. From a policy perspective, putting cleantech inside IRAP also aligns it with the broader trajectory toward the Canada Innovation Corporation (CIC), which is intended to consolidate fragmented federal R&D support into a single mission-driven vehicle by 2026–27.

What's the same as standard IRAP

The core mechanics that govern IRAP CTAS are the same mechanics that govern any other IRAP project. If you've read our general IRAP guide, most of this section will be familiar. The repetition is deliberate — founders who came in through the SDTC door often need to recalibrate.

• Cost-share, not full funding. IRAP CTAS contributes a percentage of eligible cost, not 100%. The contribution typically lands in the 60–80% range on labour and subcontractor categories. The company brings the matching cash.
• Labour and subcontractors are the eligible base. Salaries for Canada-based technical staff working directly on the project, plus arm's-length Canadian subcontractor fees, are the two categories the contribution attaches to. Materials consumed in the R&D and certain testing or validation costs may be in scope; capital equipment, overhead, rent, marketing and operating costs generally are not.
• Reimbursement model. You incur the eligible cost, submit a claim with supporting documentation, and IRAP reimburses the agreed share against approved milestones. There is working-capital exposure in the gap between paying salaries and receiving the contribution payment.
• No costs before the agreement. Costs incurred before the contribution agreement is signed are not eligible. CTAS is forward-looking, not retroactive.
• ITA-led engagement. There is no anonymous portal application. The ITA is the front door, the shaper, and the file owner. A cold proposal sent without an ITA conversation rarely converts into an active file.
• SME eligibility ceiling. 500 full-time-equivalent employees in Canada is the upper bound. Above that, the company is out of scope for IRAP — including its cleantech stream.
• Contribution, not loan, not equity. The funding is a non-repayable contribution. There is no warrant, no royalty, no equity component.

If you are familiar with how IRAP works in general, you already know most of how CTAS works in particular. The differences are in the lens, not the machinery.

What's different — the cleantech-specific lens

CTAS files are evaluated by ITAs with cleantech background and screened against criteria that don't apply elsewhere in IRAP. Three things distinguish CTAS in practice.

Environmental outcomes have to be measurable. NRC's published criteria require the company to demonstrate measurable and quantifiable environmental impacts — concretely, reduced GHG emissions, improved air, soil, or water quality, reductions in waste streams, or comparable outcomes that can be measured in defensible units. "Our solution is good for the environment" doesn't pass. "Our solution reduces process water consumption by an estimated 30% versus the incumbent process, validated against an internal LCA model and a pilot trial with one industrial customer" is the shape of the conversation. An ITA in the cleantech stream will probe the assumptions behind those numbers and ask how the environmental claim will be substantiated as the project progresses.

Validated proof of concept is the entry bar. NRC's CTAS criteria call for "an innovative technology with a validated proof of concept." This is meaningfully higher than what core IRAP sometimes funds. Concept-stage cleantech — an idea, a deck, a thesis — is not where CTAS engages. Companies need to be able to point to working hardware, a functional prototype, a pilot system, or equivalent technical evidence that the underlying technology does what it claims. If the proof of concept is still hypothetical, the ITA conversation will steer the company toward earlier-stage support before CTAS can engage on a contribution.

Path to commercialization with ecosystem alignment. CTAS evaluates whether there is a credible route from the prototype to a commercial cleantech product, often involving partnerships with utilities, industrial offtakers, accelerators, or specialised testing facilities. The cleantech ITAs will frequently make ecosystem referrals — pointing companies toward partners, pilots, certification bodies, or capital sources that are part of the cleantech-specific network. This is one of the highest-leverage parts of CTAS engagement and is harder to access from outside the program.

Eligibility — Canadian SMEs in cleantech R&D

The published eligibility bar for IRAP CTAS combines IRAP's general SME criteria with cleantech-specific requirements that the NRC criteria pages spell out. The combined list:

• For-profit business incorporated in Canada. Federal or provincial incorporation, with Canadian operations and Canadian staff. Foreign-incorporated parents with Canadian subsidiaries are reviewed carefully; the project benefit must accrue to Canada.
• Maximum 500 full-time employees in Canada. The IRAP-wide SME ceiling applies. Companies approaching the ceiling through hiring or acquisition should engage before they cross.
• Technical and business staff beyond founders. CTAS specifically calls out that the company should employ both technical and business staff — not a single founder with no team. The cleantech ITAs need to see execution capacity.
• Innovative cleantech intended for commercialization. Not research for the sake of research. Not a hobby project. A technology with a credible commercial pathway whose development is what's being funded.
• Measurable environmental benefit. A defensible plan for environmental impact in GHG, water, soil, air, or comparable metrics — quantified at a level appropriate to the technology's maturity.
• Validated proof of concept. The technology works in some form. The project is taking it from validated to commercial, not from idea to validated.
• Path to commercialization. A market thesis, identified customers or customer segments, IP position where applicable, and a credible route to revenue.
• Financial capacity for the matching share. Evidence that the business can carry its 20–40% of the project budget through the reimbursement cycle — whether from revenue, an equity round, or a committed credit facility.

Application flow — ITA pre-engagement is critical

The CTAS application flow follows the standard IRAP sequence, with cleantech-specific shaping inside it. Founders coming from the SDTC world should recalibrate hardest here: there is no SOI portal, no posted intake deadline, no quarterly cohort. The program is rolling, and the ITA is the application.

The single most common failure mode on CTAS files is treating the first ITA contact as a screening call rather than the start of the application. Founders who come prepared — with a one-pager on the technology, the environmental impact framework, the team, and a sketched project budget — consistently move faster than founders who arrive at the first meeting expecting to be told what the program funds. The ITA is reading you as much as the technology in that first conversation; the level of pre-work signals whether the company is ready to execute a contribution-funded project.

Stacking CTAS with SR&ED, the federal Clean Tech ITC, and provincial credits

The combined economics of a well-structured cleantech R&D project in Canada come from layering several non-overlapping support mechanisms. The four most relevant for a CTAS-funded company are CTAS itself, SR&ED, the federal Clean Technology Investment Tax Credit, and the applicable provincial SR&ED credit. Each works on a different cost base and has different stacking rules.

SR&ED stacking. The interaction rule that applies to core IRAP applies equally to CTAS: any cost reimbursed by the IRAP contribution is treated as government assistance and reduces the SR&ED expenditure pool on a dollar-for-dollar basis. You cannot get federal funding twice on the same dollar. On a $1,000,000 labour project with $700,000 of CTAS contribution and $300,000 of company-funded labour, only the $300,000 is in the SR&ED base. That $300,000 still produces a meaningful credit at CCPC rates plus the applicable provincial rate — in many provinces the combined effective rate puts well over 50% of the company's cash share back as SR&ED. The combination — CTAS on the program's share, SR&ED on the company's share — is the standard structure.

Federal Clean Technology Investment Tax Credit. This is a separate, capital-side credit administered by CRA under the federal clean economy ITC framework. It targets investments in eligible clean technology property — equipment to generate electricity from renewables, stationary battery storage that doesn't use fossil fuels, certain heat pumps, non-road zero-emission vehicles and related infrastructure, geothermal equipment, and other categories defined in the legislation. The headline rate is up to 30% on qualifying property acquired and made available for use within the eligibility window, with a labour-requirements regime that conditions the maximum rate on prevailing wage and apprenticeship rules. The Clean Tech ITC is not on the same cost base as CTAS — CTAS funds R&D labour and subcontractors, the Clean Tech ITC funds capital property — so the two can run in parallel cleanly. For a cleantech SME building and deploying its own equipment as part of commercialization, both can apply.

SR&ED 2.0 and provincial credits. The federal SR&ED reforms now landing under the SR&ED 2.0 framework, and the provincial SR&ED credits stacked on top of the federal credit, both interact with CTAS the same way as standard SR&ED — the credit base is reduced by the CTAS contribution. The combined arithmetic still pencils favourably for most cleantech SMEs, but it has to be modelled at the start of the project, not the end. Provincial credits vary widely by jurisdiction; the strategic question of where R&D labour is performed is meaningful here and is one of the places where a clean intake conversation with an advisor pays back.

The practical advice on stacking is the same in every advisory conversation we have on this: track CTAS-funded hours and SR&ED-claimed hours separately from the first week of the project. Doing it retroactively at tax-filing time, or worse during a CRA review, is where the mistakes happen.

What to expect from the CIC transition

Like all of IRAP, CTAS sits inside the broader trajectory toward the Canada Innovation Corporation, which is being structured to consolidate federal R&D support under a single Crown corporation through 2026–27. The published policy intent is to preserve the IRAP delivery model — ITAs, contribution agreements, the regional structure — while expanding scale and giving cleantech an explicit home alongside other priority sectors. For founders engaging with CTAS in 2026, the practical implication is that existing contribution agreements will be honoured through to completion under their original terms, the ITA relationship is intended to carry forward, and program parameters may shift as the CIC's own rules are finalised. The risk of waiting for "more clarity" is the same as it is for core IRAP: a year of not getting funded against the chance of marginally different parameters under the new regime.

Final thoughts for cleantech founders

For the cohort of cleantech founders who built their funding strategy around SDTC, the last two years have been a discontinuity. The mandate is intact, the dollars are still flowing to Canadian cleantech, but the delivery model is different in important ways. CTAS is more disciplined than SDTC was on eligible cost categories, smaller per project on average, and engaged through an ITA rather than a Statement of Interest. The work that used to go into shaping a credible SDTC SOI now goes into the ITA pre-engagement — the technology brief, the environmental impact framework, the financial readiness story, the commercialization pathway. The companies that prepare that material before contacting NRC convert; the companies that show up cold lose months.

For founders who never engaged with SDTC, CTAS is straightforward to think about: it is IRAP, with a cleantech lens. The same eligibility floor, the same ITA-led process, the same cost-share economics, the same contribution agreement template, the same stacking rules with SR&ED. The differentiator is that the technical evaluation is done by ITAs who understand cleantech, the file is screened against environmental impact criteria, and the ecosystem referrals you get on top of the contribution are routed through a cleantech-specific network rather than the general IRAP one.

The honest read on the SDTC chapter that produced CTAS: the governance failures at SDTC were serious enough to require dissolution, and the publicly reported findings on conflict of interest and ineligible projects established the policy case for consolidation under NRC. That is what happened. CTAS exists because cleantech remains a federal priority and the program-delivery question got answered in IRAP's favour. The founders best positioned to benefit are the ones who treat that answer as settled, engage IRAP CTAS on its actual terms, and build the rest of their funding strategy — SR&ED, the Clean Tech ITC, provincial credits, equity — around it.

CTAS is one of several federal supports a Canadian cleantech SME should weigh against its specific stage and project mix. Compare CTAS against SR&ED, core IRAP, CanExport, FedDev and the other programs we cover, or use our Grant Finder to map the right combination before committing a quarter to applications.