Changing a fiscal year-end is a common corporate event — driven by acquisitions, investor requirements, or administrative convenience. What many companies don’t realize until it’s too late is that a fiscal year change creates a stub period with its own SR&ED filing deadline, and missing it means permanently forfeiting the SR&ED credit for that period.
What a stub period is
When you change your fiscal year-end, the period between your old year-end and your new year-end is a “stub period” — a short tax year that is treated as its own fiscal year for SR&ED purposes. If your fiscal year previously ended June 30 and you change it to December 31, the period from July 1 to December 31 of the transition year is a stub period with its own 18-month SR&ED filing deadline.
💡 Example: Company changes fiscal year from June 30 to December 31, 2024. The stub period (July 1–December 31, 2024) has an SR&ED filing deadline of June 30, 2026. The new fiscal year (January 1–December 31, 2025) has a deadline of June 30, 2027. Two deadlines — potentially close together.
Why this creates risk
Companies in a fiscal year transition are often managing significant organizational change — an acquisition integration, a new financial system, or a restructured finance team. SR&ED planning tends to fall through the cracks precisely when attention is most divided. The stub period is also short, which can create the (incorrect) impression that there wasn’t much eligible work to claim.
SR&ED eligibility in stub periods
All the standard SR&ED eligibility rules apply to stub periods. If qualifying work occurred during the stub period — even if it’s just three months long — that work is claimable. The $3M CCPC expenditure limit is prorated for short tax years, which affects the calculation but not the fundamental eligibility.
What to do
- Identify the stub period deadline immediately when a fiscal year change is planned or completed. Put it in your tax calendar as a hard date.
- Notify your SR&ED consultant of the fiscal year change as soon as it’s decided — ideally before it happens — so they can adjust their engagement timeline.
- Document SR&ED work continuously through the transition. Don’t let the organizational disruption of a fiscal year change interrupt your documentation practices.
- Confirm with your tax advisor how the expenditure limit proration affects your ITC calculation for the stub period.
After the transition
Once through the stub period, SR&ED planning resumes on the new fiscal year cadence. The key is ensuring neither the stub period claim nor the first full-year claim under the new fiscal year gets lost in the transition. A clear handoff between your old and new tax year processes — documented and confirmed with your advisor — is the best protection.
