Most SR&ED claim reductions aren't caused by ineligible work — they're caused by documentation that can't prove eligible work happened. If you already understand what SR&ED covers and how to claim it, this guide goes one layer deeper: what actually improves your odds of the CRA accepting your claim as filed, without a lengthy review.

Why claims get reduced or reviewed

The CRA isn't primarily looking for work that doesn't qualify — genuinely eligible R&D gets flagged all the time because the paperwork doesn't clearly demonstrate the technological uncertainty and systematic investigation the program requires. Common gaps: rounded time estimates instead of real tracking, generic descriptions of "development work" instead of specific technical hypotheses, and no supporting artifacts (test logs, commit history, meeting notes) to back up the narrative.

Documentation that protects your claim

Granular time tracking. Track hours against specific technical objectives, not a flat percentage estimate at year-end. This is the single most common gap the CRA flags.
Contemporaneous records. Emails, commit logs, and meeting minutes written at the time the work happened are far stronger evidence than a narrative reconstructed months later at filing time.
A central technical repository. Keep testing data, experiment results, and technical decisions in one place you can point to, not scattered across individual engineers' notes.
Reconciliation to your general ledger. The CRA compares your claimed SR&ED amounts against your financial statements — any discrepancy is an immediate credibility problem, independent of whether the underlying work qualifies.

Red flags that trigger closer review

Rounded, round-number time estimates (100%, 50%, 25% allocations with no supporting detail)
Generic technical descriptions that could apply to any software project
A claim that increased significantly year-over-year without a clear explanation
Missing technical documentation to support the narrative

None of these mean your work doesn't qualify. They mean the CRA can't tell that it does from what you submitted — which produces the same outcome as ineligibility: a reduced or denied claim.

New for 2026: the CRA pre-claim approval option

The CRA introduced a pre-claim approval process that gives eligible filers tax credit certainty before they file, plus meaningfully faster processing — for pre-approved claims, expenditure review timelines drop from roughly 180 days to 90 days. If your SR&ED program is a recurring, meaningful part of your annual spend, opting into pre-approval trades some upfront process for reduced audit exposure and a faster refund. Worth raising with whoever prepares your claim.

Filing strategy

Submitting your SR&ED claim jointly with your T2 corporate tax return — rather than as a late or separate amendment — measurably reduces the odds of a closer CRA review. If you're filing SR&ED as an afterthought after your tax return is already in, that timing gap itself is a signal worth avoiding.

The bottom line

Improving your approval odds is mostly a documentation habit, not a filing trick: track time against specific technical objectives as you go, keep contemporaneous evidence instead of reconstructing it at filing time, and reconcile your claim to your books before you submit. The qualifying work is usually already happening — the claim just needs to prove it.

Next steps

Check your SR&ED eligibility and see what else you might be missing — run the free FundScout quiz.

How to Improve Your SR&ED Approval Odds in 2026