Reclaim R&D
tax relief.
UK software companies may be owed money back for qualifying R&D. Aven turns the engineering you’ve already shipped into defensible evidence for your accountant.
GitHub, GitLab and Linear live today · more rolling out · or we work from an export
Most software work already qualifies. The gap is proof.
If your engineers solved problems with no off-the-shelf answer, that work can qualify for UK R&D relief. The work is rarely the problem - the evidence is.
R&D tax relief UK companies claimed from HMRC in 2023-24.
R&D claims made that year - a lot of qualifying software work still goes unclaimed.
The headline merged-scheme credit rate your tax firm applies to qualifying spend.
The share of unconnected subcontractor and external-worker cost that can qualify.
Source: HMRC R&D Tax Credits Statistics (September 2025, tax year 2023-24). Software, data and cloud costs can qualify from 1 April 2023. Not tax advice.
Signal review
reviewingIllustrative
Does your engineering count as R&D?
The strongest claims come from genuine technical uncertainty - problems a skilled engineer can’t readily solve from known approaches:
- Scaling, reliability or performance under hard constraints.
- Novel algorithms, ML/AI, data or distributed-systems work.
- Integrations that needed real experimentation, not routine setup.
- Security, infrastructure or platform work with technical uncertainty.
From engineering history to accountant-ready evidence.
Connect once. Aven turns the trail into a reviewed evidence pack your accountant or R&D tax professional can use.
- 01
Connect, read-only
Authorise GitHub, GitLab or Linear. We read metadata and commit, PR, MR and ticket text only.
- 02
We build and review your pack
Aven links the advance, uncertainty and approach to the evidence trail. Every pack passes delivery review.
- 03
File it, your way
Use your accountant, or ask for an introduction to a regulated R&D tax professional.
Read-only in · reviewed pack out · source code never stored
What you actually receive.
A PDF evidence pack and CSV cost model, checked through delivery review and ready for the professional who files.
R&D evidence pack
Advance & uncertainty
The team sought to reduce p99 write latency below 40 ms under non-idempotent retries - an advance a competent professional could not readily deduce from established practice.
Three approaches were trialled and measured; the dead ends are recorded in the linked history.
Inside every pack
Technical narratives
Advance, uncertainty and approach in an AIF-aligned structure.
Linked evidence trail
Commit, PR, MR and ticket references behind the narrative.
Qualifying-expenditure model
A conservative PDF summary plus CSV cost schedule.
Ready to hand off
For your accountant, or a regulated R&D tax professional we introduce.
Every claim line traces back to the work that proves it - built to withstand an HMRC enquiry.
Experts reduce the risk.
Upgrade when you want an R&D specialist to sharpen the story and flag weak points before your accountant reviews the pack.
- Technical uncertainty is clearly explained
- Narratives are backed by linked evidence
- Weak or risky areas are flagged before hand-off
What could your work be worth?
Move the sliders for a deliberately low-balled range - not a quote or tax advice, just a reason to check properly.
Aven does not determine your liability, select your scheme, or guarantee any amount - that’s your tax firm’s role. Final figures depend on an expert’s review.
Based on £260,000 of indicative qualifying staff cost and Aven’s conservative post-2024 merged-scheme range. Your tax firm selects the scheme and determines the final claim. It is not a quote.
The things serious teams ask first.
Q01Who is Aven for?
UK software companies whose engineers tackled genuine technical uncertainty - performance, architecture, scaling, data, reliability or similar hard problems.
Q02What do I get after the free check?
If your answers show a defensible path, you can choose a draft evidence pack for your accountant or add expert review for a stronger hand-off.
Q03Do you access or store our source code?
Never. Integrations are read-only - we pull commit, PR and ticket text and metadata only, encrypted at rest, and you can disconnect anytime.
Q04Is this automated?
Aven builds your pack from your engineering history and your own account of the work - and nothing is released without passing a human delivery review. Aven Reviewed adds a competent professional's sign-off on top.
Q05Will the numbers be inflated?
No. We're defensible, not maximised. Indicative figures are deliberately conservative ranges. Nothing here is a guarantee, and nothing here is tax advice.
Q06What's the pre-notification deadline?
For most new claimants HMRC must be notified within six months of the accounting period end. A missed window forfeits only that period - if yours has closed we'll say so honestly and scope your pack to a period that's still claimable. Your adviser confirms which.
Q07Do you file my claim with HMRC?
No. Aven assembles defensible evidence for your accountant or R&D tax firm. Filing, liability, scheme selection and loss relief remain their responsibility.
See whether your work is defensible.
A free Eligibility & Readiness assessment - read-only, no card, no commitment. UK companies only.
UK only · read-only · source code never stored · not tax advice