IR35 is one of the biggest areas of uncertainty in contract recruitment not because the concept is impossible, but because employers are often balancing delivery speed with the need for consistency, documentation and confidence in decision-making.
This supporting blog builds on the IR35 section in our main contract recruitment pillar page and outlines what employers need to know in practical terms, where risk usually sits, and how to keep contract hiring moving without creating avoidable exposure.
What is IR35 (in plain English)?
IR35 is tax legislation designed to determine whether a contractor working through an intermediary (typically a personal service company) should be treated like an employee for tax purposes. In practice, it asks: If we ignore the structure, does this working arrangement look and feel like employment?
If the engagement is deemed inside IR35, the contractor is taxed broadly like an employee. If it is outside IR35, the contractor is responsible for their own tax arrangements under self-employment style rules.
Why IR35 matters to employers using contract recruitment
IR35 affects how contract engagements are structured, communicated and managed. For employers, the key priorities are:
consistency in how roles are assessed and classified
speed – keeping delivery moving while staying compliant
clarity for hiring managers and contractors
risk management through documentation and process
When these elements aren’t in place, employers can experience delays, contractor pushback, role re-scoping, or last-minute changes that disrupt hiring.
What good looks like: practical steps employers should take
While every organisation’s process varies, strong IR35 management typically includes:
Role assessment early: consider IR35 status before going to market, not after interviews.
Clear statements of work / deliverables: define outcomes, milestones and how work will be measured.
Appropriate working practices: ensure day-to-day reality matches what is written (e.g., autonomy, substitution where relevant, control factors).
Consistent communication: hiring managers, procurement and suppliers should all tell the same story.
Documented determination: record how and why the status decision was reached.
The aim isn’t to create bureaucracy it’s to avoid uncertainty that slows down hiring and increases risk.
Inside IR35? PAYE solutions can keep hiring simple
Many employers engage contractors on a PAYE basis where roles are assessed as inside IR35. This can provide reassurance because payroll, statutory deductions and compliant engagement are handled through an agreed process, often supported by the recruitment partner.
For hiring managers, this typically means you can still access contractor expertise without turning IR35 into a delivery blocker.
Common employer mistakes (and how to avoid them)
The most common issues we see include:
leaving IR35 assessment until the end of the process
confusing job titles with status (status depends on working practices, not labels)
writing one status position but operating another day-to-day
inconsistent messaging between HR, procurement, hiring managers and suppliers
A simple, repeatable approach with the right partner support is often enough to reduce friction significantly.
Final thought
IR35 shouldn’t stop organisations from using contract recruitment effectively but it does require clarity and consistency. If you want the broader view of contract recruitment lifecycle, partner support and employer best practice, our main contract recruitment pillar page ties it all together.
