Key takeaway: The SR&ED BC tax credit pays 10% refundable on eligible expenditures, on top of the federal enhanced credit. The naive math says 35% plus 10% equals 45% combined — but the CRA treats provincial credits as government assistance that reduces your federal base, so the real combined rate is about 41.5%. BC's expenditure limit tracks the full federal $6 million ceiling rather than a lower fixed cap, and BC Budget 2026 made the credit permanent. Model the 41.5%, not the 45% everyone quotes, and the rest of the math falls into place.
British Columbia runs one of the more straightforward provincial SR&ED credits in the country, and BC Budget 2026 just made it simpler still: the credit is now permanent (it previously had a legislated expiry date), and its expenditure limit now tracks the federal government's $6 million ceiling instead of trailing behind it.
Here's what the SR&ED BC tax credit actually pays, why the honest combined rate is about 41.5% rather than the 45% you'll see quoted almost everywhere, who qualifies after the 2026 changes, and a worked example so the number is concrete rather than a headline percentage.
What is the BC SR&ED tax credit?
The BC SR&ED tax credit is a provincial add-on to the federal program, administered alongside your federal claim rather than as a separate application process. We keep a running summary of the current rates and rules on our British Columbia SR&ED page; the short version is that the credit comes in two forms:
- Refundable, 10% — for CCPCs and, since BC Budget 2026, eligible Canadian public corporations, for tax years beginning on or after December 16, 2024. Cash back even at zero tax payable, up to the expenditure limit.
- Non-refundable, 10% — for expenditures in excess of refundable claims, and it may be claimed by all qualifying corporations. It offsets BC tax owing, with a 10-year carryforward and a 3-year carryback if you can't use it right away.
Three changes from BC Budget 2026 matter more than the rate itself, which hasn't moved:
- The credit is now permanent. BC's SR&ED tax credit previously had a legislated expiry date. Budget 2026 removed it, so companies planning multi-year R&D spend no longer need to track a BC-specific renewal date the way they used to.
- The provincial expenditure limit now matches the federal one. Per BC's SR&ED page, the refundable credit applies "up to the federal expenditure limit," which is now $6 million following Bill C-15's royal assent on March 26, 2026. BC adopted the federal changes rather than keeping its own separate, lower ceiling.
- Refundability is no longer CCPC-only. Budget 2026 extended the refundable credit to eligible Canadian public corporations, mirroring the federal expansion of the enhanced 35% rate to the same group.
How the BC credit stacks with the federal SR&ED credit
The federal side is the enhanced 35% refundable investment tax credit, available on qualifying expenditures up to $6 million per year for tax years beginning after December 15, 2024. BC adds 10% refundable on top. The naive math says 35% plus 10% equals 45% combined. The naive math is wrong.
Here's why. Under the CRA's Assistance and Contract Payments Policy, provincial R&D tax credits are government assistance, and government assistance reduces your qualified SR&ED expenditures for the federal credit under section 127(18) of the Income Tax Act. That applies whether the provincial credit is refundable or non-refundable. BC's 10% doesn't sit beside the federal 35%. It comes off the federal base first.
So the effective stack on a common base looks like this: BC pays 10%, and the federal 35% then applies to the remaining 90%. That's 10% plus 31.5%, or about 41.5% combined. Meaningfully better than federal-only, and meaningfully short of the 45% most write-ups quote.
Run the numbers for a CCPC spending the full $6 million in eligible expenditures in BC:
- BC SR&ED credit (10% of $6 million): $600,000, refundable.
- Federal qualified expenditures after the BC credit: $5.4 million.
- Federal enhanced ITC (35% of $5.4 million): $1,890,000, 100% refundable up to the limit.
- Combined: $2,490,000 — about 41.5% of the $6 million spent.
Treat those figures as illustrative rather than a quote. The exact interaction depends on your expenditure mix and how overhead is treated under the proxy method, so your own claim won't land on the percentage exactly. But the direction is not in doubt: the CRA's policy is explicit that provincial credits reduce the federal base, so any source quoting a flat 45% is skipping a step the CRA doesn't skip.
Two things still cut in BC's favour. First, the grind is a good trade. Taking BC's $600,000 costs you $210,000 of federal credit, for a net gain of $390,000 — and while the CRA lets you renounce a provincial credit to avoid the reduction, giving up 10 refundable points to recover 3.5 federal points is a trade nobody should make. Second, the combined rate holds across the full $6 million. Ontario's OITC caps its top-up at a $3 million provincial limit that didn't move when the federal limit doubled, so an Ontario CCPC spending $6 million only gets the provincial 8% on the first half. BC's page states its refundable credit runs "up to the federal expenditure limit," which means the two limits are tied together, not independent.
Who qualifies for the SR&ED BC tax credit
Provincial eligibility sits on top of federal eligibility, not instead of it. You need to clear the federal bar first: your work has to attempt a scientific or technological advancement in the face of genuine uncertainty, pursued through systematic investigation, per the CRA's eligibility guidance. That test is national — there's no BC-specific eligibility standard — and we walk through the full two-part test, the support-work categories, and the exclusions in the 2026 SR&ED guide. If your work qualifies federally, the BC questions are only about where the work happened and what kind of corporation you are.
Start with where. The permanent-establishment requirement isn't just BC convention; it's in the CRA's own policy. The Assistance and Contract Payments Policy states that, with the exception of Quebec, a claimant must have a permanent establishment in the province or territory where they perform the R&D. A team split across provinces — engineers in Vancouver, a contractor in Calgary — only has the BC-attributable share qualify for BC's credit, even though the full amount can still qualify federally.
Then who. The refundable 10% is available to CCPCs and, for tax years beginning on or after December 16, 2024, to eligible Canadian public corporations, per BC Budget 2026. Corporations outside both categories still claim the 10% non-refundable version, which applies to expenditures in excess of refundable claims, may be claimed by all qualifying corporations, and carries forward 10 years or back 3. The rate is the same either way, unlike Ontario's split between an 8% OITC and a separate 3.5% ORDTC. That's a simpler structure to reason about: in BC, the headline rate doesn't change based on corporate structure, only whether it arrives as a refund.
A worked example: $750,000 in BC R&D salaries
Take a CCPC with a permanent establishment in BC, spending $750,000 in eligible SR&ED salaries in a year. The order of operations matters: the BC credit is calculated first, then the federal credit applies to what's left.
- BC SR&ED credit (10% of $750,000): $75,000, refundable.
- Federal qualified expenditures after the BC credit: $675,000.
- Federal enhanced ITC (35% of $675,000): $236,250, refundable.
- Combined: $311,250 — about 41.5% of the $750,000 spent.
That's an illustration, not a quote. The prescribed proxy amount adds 55% of your salary base as a standardized overhead allowance if you use the proxy method, which enlarges the base before either credit applies, and the exact provincial-federal interaction shifts with your expenditure mix. The result also depends on how much of your team's time is BC-attributable. Glauq's calculator is a faster way to get a number for your own claim than working the proxy math by hand.
How BC compares to the rest of the country
BC's 10% rate is worth knowing honestly against the alternatives, not just as a standalone number:
- Ontario's OITC pays 8% refundable, a lower headline rate than BC's 10%, and its own provincial expenditure limit stayed at $3 million even after the federal limit doubled — so Ontario's combined rate effectively steps down past $3 million of spend, where BC's doesn't.
- Quebec runs a different structure: the refundable CRIC credit pays 30% on the first $1 million above an exclusion threshold and 20% above that, for tax years beginning after March 25, 2025 — a higher rate on a smaller initial band, structured differently from a flat percentage add-on.
- Alberta's Innovation Employment Grant pays 8% up to a base spend level and 20% above it, up to $4 million in annual R&D spend — a grant mechanism layered on the federal credit rather than a stacked tax credit, but comparable in effect.
- NWT, Nunavut, and PEI have no provincial R&D credit at all, per the CRA's own provincial credits summary.
One caveat applies to every line above: the federal grind hits all of them. Each province's credit reduces federal qualified expenditures the same way BC's does, so no province's real combined rate is the sum of its headline rates. Quebec's often-quoted "65%" first tier works out to roughly 54.5% once the CRIC reduces the federal base, and Ontario's "43%" is closer to 40.2%. Comparing provinces on naive sums gets the ranking roughly right and every actual number wrong.
None of that is a reason to relocate a company purely for the tax rate — moving a team is expensive and disruptive in ways that outweigh a few percentage points of provincial credit for most startups. It is a reason to model your actual combined rate accurately if your company already has, or is considering, BC operations, rather than assuming every province's provincial credit behaves the same way once you scale past a few million dollars of spend.
Common mistakes we see BC founders make
This part is our read, not a sourced claim, but it's a pattern worth naming plainly: the most common way BC companies underclaim isn't miscalculating the 10% rate, it's forgetting the provincial credit exists as a separate line item at all. A federal-only claim still gets filed, still gets processed, and still looks complete to a founder who's never seen the alternative. Nothing about the federal filing signals that a provincial credit was left on the table.
A second pattern: treating the "permanent establishment" requirement as automatically satisfied because the company is headquartered in BC. If your engineering team is genuinely distributed — a remote hire in another province, a contractor working from outside BC — the BC-attributable share of expenditures is narrower than "100% of the federal claim," and the two numbers shouldn't be assumed equal without checking how the work was actually allocated.
A third: modelling 45% as the combined rate. The real number is about 41.5%, because BC's credit reduces your federal qualified expenditures before the 35% applies — a forecast built on the naive sum overstates the claim by 3.5 points of spend, which is $210,000 on a $6 million budget. Refundability, meanwhile, depends on being a CCPC or an eligible Canadian public corporation. A profitable corporation outside those categories is still looking at a real credit, just a non-refundable one against tax owing rather than a cheque.
Filing: what's different at the provincial level
The federal and BC credits are filed together in practice, which is part of what makes BC's process simpler than a province with a fully separate filing.
- Federal claim: Form T661 plus Schedule T2SCH31, filed with your T2 corporate return, due 18 months after your fiscal year end — the same hard deadline with no extensions that applies everywhere in the country.
- BC claim: Form T666, filed with the same T2. The credit lands on Schedule 5 of the return — line 674 for the refundable credit, line 659 for the non-refundable one.
Both still need to be complete and accurate. A federal claim filed correctly without the T666 attached still earns the federal credit, but it leaves the refundable 10% unclaimed. That's real cash, not a tax offset most early-stage companies in a loss position can't use anyway.
Where pre-claim approval fits for a growing BC claim
As of April 1, 2026, the CRA offers an optional pre-claim approval process, applied for through My Business Account before the work begins. It's federal, not BC-specific, but it's useful for a scaling BC company for the same reason it's useful anywhere: it settles the federal eligibility question for up to three projects, for up to three years, before you've committed the spend.
Because BC's provincial credit tracks the federal expenditure limit dollar-for-dollar, removing eligibility risk on the federal side removes it on the BC side too. There's no separate provincial approval process to layer on top. The program is open to CCPCs, other Canadian corporations, and partnerships with gross business income under $25 million and in good standing. Projects can't have been claimed in a prior year or be involved in litigation. A determination arrives within 8 weeks, and claims made up only of pre-approved projects get a faster, expenditures-only review: 90 days instead of the standard 180. None of this changes your 18-month filing deadline, but for a BC team deciding whether next year's roadmap clears the bar, it's a lower-risk way to find out than waiting until claim time.
Software is where most BC claims already are
BC's tech sector, concentrated around Vancouver, skews heavily toward software. That lines up with the national picture: software development accounted for 42.6% of the investment tax credits allowed nationally in FY2025-26, the largest single category by a wide margin. If your BC company builds software and has assumed SR&ED is mainly for hardware or lab-based research, that assumption runs backwards: more of what your engineering team does likely qualifies than you'd guess, and BC's 10% applies to eligible software salary costs the same way it applies to any other eligible expenditure.
That same CRA dataset shows 90% of claims nationally were accepted as filed with no review in FY2025-26, and refundable claims accepted as filed were processed within 60 calendar days 95% of the time. Those are federal service standards for the CRA's review of the SR&ED claim itself, not a guarantee about how quickly BC processes its own provincial credit. The two are administered through related but distinct processes, so a fast federal outcome doesn't automatically mean the BC portion lands on the same timeline.
Frequently asked questions
What is the SR&ED BC tax credit rate? 10% of eligible expenditures, refundable for CCPCs and eligible Canadian public corporations, non-refundable for other qualifying corporations (10-year carryforward, 3-year carryback). Combined with the federal enhanced rate, the effective total is about 41.5% — not the 45% a naive sum suggests, because the BC credit reduces your federal qualified expenditures before the 35% applies.
Does the BC credit apply to the full $6 million federal limit? Yes. Following BC Budget 2026, BC's refundable credit runs up to the federal expenditure limit, which is now $6 million per Bill C-15. Unlike provinces with a fixed, lower provincial cap, BC's limit moves with the federal one.
Is the BC credit still temporary legislation? No. The credit previously had a legislated expiry date; BC Budget 2026 removed it and made the SR&ED tax credit permanent, per BC's SR&ED page.
Can I claim both the BC credit and the federal SR&ED credit? Yes — they're designed to stack, just not additively. BC's credit is claimed on Form T666 with your T2, alongside the federal T661 and Schedule T2SCH31. A CCPC with $750,000 in eligible BC salaries would receive $75,000 from BC (10%), and the federal 35% would then apply to the remaining $675,000 for $236,250 — $311,250 combined, or about 41.5%.
What if my company isn't a CCPC? Since BC Budget 2026, eligible Canadian public corporations can also claim the refundable 10% for tax years beginning on or after December 16, 2024. Corporations outside both categories claim BC's 10% non-refundable credit, which applies to expenditures in excess of refundable claims and offsets BC tax owing, with a 10-year carryforward and a 3-year carryback.
Do I need a permanent establishment in BC to claim the credit? Yes. The CRA's Assistance and Contract Payments Policy states that, with the exception of Quebec, a claimant must have a permanent establishment in the province or territory where the R&D is performed. Federal SR&ED eligibility has no such requirement — a team split across provinces can still claim 100% federally, but only the BC-attributable share qualifies for BC's credit.
BC's SR&ED credit is one of the simpler provincial add-ons to model, precisely because its rate doesn't change with corporate structure and its limit now tracks the federal one. The number that matters is the actual combined rate on your specific spend — about 41.5% once the federal grind is applied — not the 45% headline sum.
See what your BC SR&ED claim could be worth — estimate your combined federal and BC refund, read the full 2026 SR&ED guide, or check your eligibility.