At a glance
Source Advisors is one of the clearer examples in the UK market of a consultancy that treats R&D Tax Credits, Capital Allowances and Land Remediation Relief as adjacent rather than separate services. Uplift Tax has the same integrated view, but delivers it through specialist introductions rather than a single firm.
| Criterion | Source Advisors | Uplift Tax (introduction) |
|---|---|---|
| Founded | Established UK presence within a wider US-UK group (publicly listed) | Blue Llama Ltd incorporated 2020 |
| Model | Single consultancy, multi-relief in-house | Introducer to HMRC-registered specialist network |
| Scope of services | R&D, Capital Allowances, Land Remediation, Patent Box | R&D, Capital Allowances, Land Remediation (via specialist introduction) |
| Typical fee | Percentage of claim or fixed-fee engagement | No win, no fee (charged by the specialist) |
| Minimum claim size | No public minimum; public positioning is mid-market and SME | No minimum at assessment stage |
| Trustpilot rating | Publicly listed rating, high at time of writing (April 2026), publicly available, subject to change | Not individually rated; specialist firms are rated on their own pages |
| Cost of initial assessment | Free initial consultation | Free assessment, then no win, no fee if you proceed |
Where Source Advisors excels
Three honest strengths worth calling out.
1. Breadth of tax-relief coverage under one roof. Source Advisors handles R&D, Capital Allowances, Land Remediation and Patent Box in-house. For companies that want a single firm to look across all these, the consolidation has real value. Documentation, engagement letters and point-of-contact are all in one place.
2. Patent Box experience. Patent Box is a relief most smaller R&D specialists do not handle. Source Advisors has publicly-stated Patent Box capability, which matters for companies with qualifying patents as part of their commercial model.
3. Established processes. As part of a wider transatlantic incentives group, Source Advisors runs to structured processes. For finance teams that value procedural consistency and documented sign-off, that is a fit advantage.
Where Uplift Tax fits differently
1. Specialist matched to sector, not pooled inside a firm. The Uplift Tax introduction is to a firm chosen specifically for your sector and claim type, not whichever consultant has capacity this week inside a single multi-relief consultancy. For a niche sector claim, that sector match often matters more than procedural uniformity.
2. Free eligibility assessment with no preparation conflict. Because Uplift Tax does not prepare claims, the assessment has no internal incentive to push borderline cases. If R&D is weak, we say so, even if Capital Allowances or Land Remediation look stronger.
3. Lower-friction first step for SMEs. The assessment is designed for a busy founder or FD who wants a ten-minute eligibility view before committing to anything. A full consultancy engagement letter is a bigger first step.
Who should consider Source Advisors
- Your business has Patent Box relevance alongside R&D and you want that handled by the same firm.
- You want a single consultancy to run R&D, Capital Allowances and Land Remediation under one engagement letter.
- You have a finance function that prefers a named consultancy with documented processes and a wider group behind it.
- Your R&D spend is mid-market and you want the breadth of tax-incentive coverage in one relationship.
Who should consider Uplift Tax
- You want a free, no-pressure eligibility view across R&D, Capital Allowances and Land Remediation before deciding anything.
- You want a specialist firm matched to your sector rather than pooled consultants inside a larger consultancy.
- You are an SME and proportionate, no-win-no-fee engagement matters more than group scale.
- You do not have Patent Box exposure and do not need that specific service line.
For more, see our process overview and the specialist network.
What both have in common
- Both work under HMRC rules and the merged R&D scheme rules applicable from 1 April 2024. Background: merged scheme guide.
- Both treat R&D, Capital Allowances and Land Remediation as related opportunities rather than siloed services.
- Both rely on HMRC-registered, CTA or ATT-qualified advisers at firm level.
- Both use fee-for-outcome structures, not hourly billing.
Who benefits most from Patent Box alongside R&D
Patent Box is a relief some readers will not have considered. It applies a reduced 10 percent rate of corporation tax to profits derived from qualifying patents. For a company with patented inventions that are monetised through product sales or licensing, Patent Box can materially reduce the effective corporation tax rate on the profits attributable to those patents.
Source Advisors is unusually well-positioned to handle Patent Box alongside R&D because it offers both services in-house. For a company with a patent pipeline tied to its R&D programme, a combined Source Advisors engagement keeps both reliefs aligned. Uplift Tax does not currently introduce Patent Box specialists through the network; a claimant with Patent Box exposure is either referred out or directed to a firm that covers both. This is a genuine scope difference worth naming.
For the majority of SME claimants, Patent Box does not apply, because there is no qualifying patent. In that case the service-breadth point does not move the decision.
Fee transparency
Source Advisors does not publish a standard UK R&D fee rate; engagements are scoped individually and fees are presented in the engagement letter. For combined engagements across R&D, Capital Allowances, Land Remediation and Patent Box, the fee structure reflects the broader scope. For single-relief engagements, the fee is narrower.
Uplift Tax network specialists charge on a no-win-no-fee basis with the fee disclosed up front. Where a claimant has multi-relief exposure, we introduce a specialist for each relief, and each specialist's fee is disclosed separately. The claimant can accept or decline each introduction independently.
HMRC enquiry posture
Source Advisors, as a larger consultancy, runs structured enquiry-response processes. Uplift Tax network specialists include firms with specific enquiry track records by sector. Where enquiry risk is elevated, the introduction is made to a firm with demonstrable defence capability in that claim type.
Onboarding journey, in plain terms
The onboarding difference between a large consultancy and a specialist introduction is worth naming. With Source Advisors, onboarding starts with a consultancy scoping call, followed by an engagement letter that can cover multiple reliefs. Documentation is uniform across relief types and sits under one firm's client file. Coordination across reliefs is handled internally.
With a Uplift-introduced specialist path, onboarding starts with a short, free assessment. If multiple reliefs are in scope, you are introduced to a specialist for each. Each engagement letter is a separate document, and coordination between specialists is handled via the accountant where needed. For a finance team that values administrative simplicity, the Source Advisors route is cleaner. For a finance team that prefers the best specialist per relief, the Uplift route is stronger.
Multi-relief in practice
Both Source Advisors and Uplift Tax treat R&D, Capital Allowances and Land Remediation as related opportunities. The delivery model is different. Source Advisors is a single firm covering all three (and Patent Box on top). Uplift Tax introduces separate specialists per relief, each chosen for depth in that area. Neither model is universally better; the choice depends on whether the claimant prefers a single engagement letter or specialist-per-relief delivery.
For a property-heavy business where the Capital Allowances claim is the larger relief, specialist-per-relief delivery often yields the better Capital Allowances outcome because the surveyor is dedicated to property. For a claimant that values procedural uniformity, a single-firm engagement is simpler to manage.
A note on compliance and positioning
Uplift Tax is an introducer service. We are not a tax adviser, accountant or legal firm. We do not prepare claims. We run an eligibility assessment and introduce you to an HMRC-registered specialist. Recovery values at assessment stage are indicative only.
References to Source Advisors on this page are drawn from publicly available sources including the Source Advisors website, Companies House filings, Trustpilot and trade press.