What actually counts as R&D for a UK tax claim
Most business owners rule themselves out of R&D tax relief in the first thirty seconds, usually because the phrase sounds like it belongs to laboratories and universities rather than to a workshop, a kitchen or a logistics office.
The statutory test is narrower than the marketing around it suggests, but broader than the everyday meaning of the words. HMRC asks whether a project sought an advance in science or technology, and whether it did so by resolving an uncertainty that a competent professional in the field could not readily work out.
That framing matters. It is not about whether the outcome was novel to the world in a headline sense. It is about whether, at the point the work started, the route to the answer was genuinely unclear to someone who knew the field well.
In practice, the qualifying work is often the part nobody wrote down. A production line reconfigured to hold a tolerance the existing kit could not reliably hit. A material substituted because the original became unavailable, with the substitution requiring real testing rather than a swap. Software built because nothing off the shelf handled the case, and the team could not tell in advance whether the approach would hold at volume.
Equally, plenty of work that feels innovative does not qualify. Applying an established technique competently is not an advance. Cosmetic or aesthetic changes are not an advance. Nor is the commercial risk of a new product line, however real that risk was.
The rules have also moved. Rates changed in April 2023, the SME and RDEC schemes merged for accounting periods starting on or after 1 April 2024, and the compliance bar has risen sharply, with additional information now required before a claim is accepted. Claims that would have passed without comment three years ago now get read properly.
None of which is a reason to avoid claiming. It is a reason to have the work assessed honestly before anything is submitted, and to have the submission prepared by a firm that will still be there if HMRC asks a question about it.
