Coaching vs mentoring: the difference, and when to use each

Coaching and mentoring get used interchangeably in most workplaces, which is a shame, because they solve different problems and mixing them up wastes both.

The short version

Coaching in more detail

Coaching rests on an assumption that feels counterintuitive to most managers: the person usually knows more about their own situation than you do, and your job is to help them think, not to supply the answer.

That is why a good coach does not need to be an expert in the coachee's discipline. A coach helps someone define what they actually want, examine what is really going on, generate options beyond the obvious two, and commit to something specific.

The most widely used structure is the GROW model — Goal, Reality, Options, Will. Its value is that it stops the conversation collapsing into advice-giving within ninety seconds, which is what happens naturally.

What good coaching sounds like:

• "What would a good outcome look like by the end of the month?"
• "What have you tried already?"
• "What's stopping you?" — then silence.
• "If that constraint disappeared, what would you do?"
• "What will you do, and by when?"

What it does not sound like: "Have you tried…", repeatedly.

Mentoring in more detail

Mentoring is about transferring experience. A mentor has been somewhere the mentee has not, and the value is in that gap — the war stories, the unwritten rules, the introduction, the honest read on a decision.

Mentoring works when:

• The relationship is voluntary on both sides
• There is no reporting line between them, so the mentee can be candid
• Both know whether it is career mentoring, technical mentoring or induction
• It has some rhythm — an hour a month beats a vague "any time"

Mentoring fails when it is assigned by a scheme with no chemistry, when the mentor uses it to relive their own career, or when nobody agreed what it was for.

Which one does this situation need?

• A team member who keeps missing deadlines and cannot see why → coaching. They have the information; they need to examine their own working patterns.
• A newly promoted supervisor terrified of their first difficult conversation → both. Mentoring for "here's what I do", coaching for "what specifically will you say on Tuesday?"
• A technically brilliant specialist who wants to know whether to go into management → mentoring. They need someone else's lived experience of the trade-off.
• Someone whose performance is below the required standard → neither, initially. That is performance management. Coaching can support it, but do not use a coaching conversation to avoid saying clearly that the standard is not being met.

That last one is the most common and most damaging confusion in UK workplaces: a manager who thinks they are coaching when they are actually postponing an honest conversation.

The manager's dual role

If you manage someone, you cannot be a neutral coach to them, because you also set their objectives and influence their pay. That does not mean don't coach — it means be explicit. "I want to spend this half hour as a coaching conversation, not an appraisal. Nothing here goes into your review." Then honour it.

Keep the boundary in the other direction too. Where a conversation strays into something outside your competence — mental health, a safeguarding concern, a grievance — stop and route it properly. Knowing that boundary is itself a marker of a capable manager.

How to evidence coaching and mentoring in your ILM portfolio

Level 5 — Unit 505 Coaching and mentoring in a leadership role is the dedicated unit and is one of the most popular optional units in the qualification. Suitable evidence:

• Coaching session records (with consent, suitably anonymised), showing the structure you used and the actions agreed
• A reflective account of a coaching relationship over several sessions, including what you changed in your own practice between them
• A witness testimony from the person you coached or mentored, describing the effect
• Assessment observation or a video clip of a coaching conversation — note that video evidence is capped at 15 minutes
• A contracting document or coaching agreement as a workplace document

Level 3 — Unit 303 Managing the performance of others for developmental conversations within performance management, and Unit 302 Managing personal and professional development where you are on the receiving end of coaching or mentoring as part of your own development.

Consent and confidentiality matter here more than anywhere else in a portfolio. Never include another person's identifiable personal information without their permission, and redact where you can. Workplace documents as evidence covers how to do that safely.

Where to go next

• The GROW coaching model — the structure to use in the conversation.
• ILM Level 5 — includes Unit 505 as an optional unit.
• Video evidence for your portfolio — including the 15-minute limit.