The blanket-ban mistake
Many UK organisations enacted blanket Inside IR35 policies ahead of off-payroll reform, fearing HMRC penalties. That approach removes tax anxiety for procurement and HR, but it also alienates the highest-calibre independent experts. Over the last two years, market-leading professionals have consistently declined Inside IR35 work unless compensated with material rate uplifts.
The hidden cost of a blanket ban outweighs the perceived compliance safety. Programmes overrun because the depth of available expertise drops. Internal teams struggle to deliver complex SAP or Data & AI transformations because the senior tier of the market operates exclusively through their own limited companies.
Engagement leaders need to move from risk avoidance to risk management. It is entirely legal and manageable to engage Outside IR35 experts, provided the working practices and contract mirror a genuine business-to-business partnership rather than disguised employment.
Designing a genuine Statement of Work
The most effective way to engage top experts Outside IR35 is to fundamentally change how you scope the work. Stop bringing in a generic developer to join your existing team. Instead, engage a supplier to deliver a specific piece of code, architecture or configuration by a set date.
A robust Statement of Work shifts the focus from time and materials to milestone delivery. It must define exactly what the professional is responsible for building, configuring or migrating. If you dictate core hours, integrate them into appraisal cycles or force them onto standard corporate hardware for its own sake, you blur the lines of employment.
Engagement leads should be educated on these parameters. True business-to-business partnerships require the expert to hold autonomy over how the work is delivered. If you cannot offer that autonomy, the scope should remain Inside IR35 and be budgeted accordingly.
Navigating CEST tool limitations
HMRC provides the Check Employment Status for Tax tool to help businesses determine an assignment status. While free and accessible, CEST is famously flawed. The tool struggles with Mutuality of Obligation and leans toward Inside IR35 outcomes even when case law points elsewhere.
Relying solely on CEST produces overly conservative determinations. GlobaTech routinely sees perfectly viable project scopes classified Inside IR35 simply because someone answered a subjective question the wrong way. That immediately locks the best experts out of the engagement.
We advise partners to use independent, deeply insured determination specialists such as Qdos. They review both the written contract and the intended working practices and issue a well-founded, legally defended status determination statement. That protects your business and lets you confidently market a genuine Outside IR35 engagement.
Handling genuine Inside IR35 scenarios
When work genuinely requires integration into your team under close supervision, Inside IR35 is the right call. Transparency is key. To fill the scope quickly, be honest about the mechanics of Umbrella payroll.
Organisations issuing Inside IR35 contracts must adjust their budgets. Through an Umbrella, the day rate absorbs Employer National Insurance and the Apprenticeship Levy before income tax and employee NI are applied. A £600 per day Inside engagement takes home meaningfully less than a £600 Outside equivalent.
To secure market-leading experts, offer a rate uplift. Alternatively, offer clear remote-working flexibility, streamlined selection stages, or extension commitments that make the Inside role more attractive to an otherwise reluctant expert base.
Front-loading the determination process
Independent experts value decisiveness. The worst-case scenario is running someone through three technical conversations and then telling them at offer stage that the engagement is actually Inside IR35, or that the determination is still pending. That leads to immediate rejections and burns critical programme time.
Determine IR35 status before the brief goes to market. Have the Status Determination Statement completed, approved and clearly reflected on the engagement brief. When experts see a scope with a confident, pre-assessed Outside IR35 position, engagement triples in the first 24 hours.
Treat status determinations as a preliminary requirement rather than an afterthought. Engagement leads and procurement teams then build immediate trust with the expert market — trust that translates into faster mobilisation, lower time-to-value and stronger delivery outcomes.

