Why Payroll Is Usually the Biggest SR&ED Lever
For most Canadian technology companies, SR&ED wages drive the bulk of the investment tax credit. Understanding how time allocation works changes how you think about what to claim.
The company that left $200,000 on the table
A Toronto SaaS company files its first SR&ED claim. They're careful — maybe overly careful. They claim only the hours they can point to with absolute certainty: one engineer, one project, six months. The refund comes back at $52,000. Their CPA reviews it afterward and estimates they could have defensibly claimed three to four times that amount.
The qualifying work was there. The engineers were there. The technical uncertainty was real. What was missing was the time allocation — a structured estimate of which employees spent meaningful time on qualifying investigation, and how much. Underclaiming is the most common SR&ED mistake at companies doing their first claim.
Where SR&ED credits actually come from
For Canadian-controlled private corporations (CCPCs), the federal SR&ED Investment Tax Credit rate is 35% on the first $3 million of qualified expenditures per year — and it's fully refundable. That means you receive it as cash even with no tax owing.
Every $100,000 in qualifying wages = up to $35,000 back from CRA (federal ITC alone, before provincial credits). For an early-stage company with 5 engineers each spending 40% of their time on qualifying work at $120K salaries: $120K × 40% × 5 = $240K in qualifying wages → up to $84K back.
SR&ED also produces a tax deduction on qualifying expenditures in the year incurred — separate from and in addition to the ITC. For profitable companies, the combined benefit is the deduction savings plus the credit.
How time allocation actually works
CRA accepts three approaches to time allocation, and the choice depends on how your team works:
- Specific identification: directly tracked hours against SR&ED projects using time-tracking tools. Most defensible, but not always practical
- Proxy method: if an employee spent more than 90% of their time on SR&ED work, their full salary can be claimed without granular records — a significant simplification for small teams where one engineer owns a qualifying project
- Percentage-based allocation: reasonable estimates based on project records, Git history, or manager attestation. Accepted when supported by contemporaneous evidence
You don't need time sheets going back two years. Reasonable estimates, supported by project records and engineering context, are what CRA expects. The strength of the support matters more than the precision of the estimate.
What gets underclaimed — almost every time
Technical leadership time is the most consistently missed pool. CTOs, VPs Engineering, and senior architects spend significant time on design reviews, architectural decisions, and investigation direction — time that's often qualifying and rarely claimed. If your CTO spent 30% of their year on qualifying technical problems, that's a material number.
- Arm's-length contractors qualify at 80% of cost and can add meaningfully to the total — many companies forget them entirely
- Employees who split time between qualifying and non-qualifying work are often claimed at 0% because they don't fit neatly into one category
- Part-year employees who joined mid-year and immediately contributed to qualifying work
If your sole ML engineer spent the year investigating novel model approaches for a domain with no established benchmark — and 90%+ of their time was on that investigation — their entire salary qualifies under the proxy method, without time sheets. One engineer. One letter of attestation. Potentially $35K+ back on a $100K salary.
The calibration goal
The goal isn't to maximize the claim — it's to claim what you can accurately support. Overclaiming creates CRA review risk; underclaiming is a straight loss. A qualified CPA helps calibrate to the right level, matching the time allocation to the evidence that actually exists.
For most early-stage tech companies operating well below the $3M expenditure limit, the arithmetic is straightforward. The primary lever is identifying which employees spent meaningful time on qualifying investigation — and documenting that clearly.
This guide contains general information about SR&ED tax incentives and is not tax advice. Credit amounts depend on your specific facts, expenditures, and tax position. SR&ED estimates are simplified and informational only. Always work with a qualified Canadian CPA before filing.
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