When most businesses think about R&D tax relief, they start with: "Does this project qualify?" That matters.
But in today's environment, there's another question that matters just as much: "Could we prove it?"
Because qualification and proof aren't the same thing. Plenty of claims are technically valid on paper. They fall apart when someone asks for the evidence behind them.
1. Where Should You Start?
Many businesses approach R&D documentation backwards.
- They start with the numbers.
- Then they write the narrative.
- Then they try to work out what evidence supports it.
That sequence feels efficient, but it creates risk. In reality, the claim should start with one clear explanation: what technical uncertainty were you trying to resolve, and what did you actually do?
If the documentation only appears at the point you're preparing the claim, it can feel reconstructed. That's when questions start.
2. What Does HMRC Actually Want to See?
Evidence doesn't need to be complicated.
It does need to be real, specific, and connected to the work you performed. In many cases it's already inside the business:
- Design notes and technical decisions
- Testing records (including failures)
- Development tickets and internal discussions
- Repository history
- Notes of what changed and why
On their own, these can look small. Together, they show the technical uncertainty you faced, the iterations you went through, and how the outcome was reached.
That's what makes a claim easier to stand behind.
3. Why Does This Matter More Now?
The practical reality is that scrutiny has increased over the last few years. So claims are increasingly judged less on how confident they sound, and more on whether the work is properly evidenced.
A well-supported claim is rarely the one with the most polished wording.
It's the one where the technical work, the financial costs, and the documentation all align.
Ask Yourself
If HMRC asked for supporting evidence tomorrow, could you provide it easily? If the answer is yes, you're usually in a strong position.
If the answer is "we'd have to reconstruct it", the claim probably needs more work before submission.
R&D tax relief remains valuable for genuinely innovative businesses. But the strength of a claim is increasingly defined by what sits behind it - and how it's structured.
If you're reviewing an R&D claim and want a straightforward conversation about evidence, structure and defensibility before you submit, speak to us.
