Formative Feedback in Mentor Coaching: What the 2027 Model Asks of You

Quick answer. The 2027 mentor coaching model is not just a new set of forms — it is a change in what feedback is for. ICF's own requirements table labels the old Performance Evaluation "Summative" and the new mentor coaching route "Formative": multiple observations with feedback over time, instead of a verdict on one recording. Concretely, from January 1, 2027, mentor coaches must complete a Session Observation Form for every observed session — including written feedback with "a minimum of 2-3 areas of strength and 2-3 areas for development, accompanied by evidence" such as timestamps and quotes — and close the engagement with a cumulative Competency Review Form that must trace back to those observation forms. Verbal and written feedback are required in every one-to-one session. (ICF announcement, ICF Mentor Coach Handbook)

In mentor coach circles this month, the conversation has visibly shifted. The questions of spring — which MCS badge do I need? which path do I take? — are giving way to a harder one: what does it actually mean to move from performative assessment to formative development? The ICF Mentor Coaching Community of Practice is dedicating a session to exactly that this September, framed around the "hopes, fears and emerging best practices" of the transition and "the mindset needed to offer verbal and written formative feedback with clarity, care, and integrity." And in discussion threads, coaches share the other side of the same coin: stories of nearly abandoning a credential journey because a mentor coach — credentialed, experienced — simply didn't know how to give developmental feedback.

That is the gap this guide addresses. We have covered why the Performance Evaluation is being replaced and how to earn the MCS. This article is about the craft the new model demands: what ICF's own documents say formative feedback must contain, how the two forms structure it, and the real tensions — named by ICF itself — that mentor coaches will have to manage.

Important disclaimer. Mentor Coaching AI is not affiliated with or endorsed by the International Coaching Federation. We summarise publicly available ICF announcements and documents to help coaches plan. Policies can evolve — verify the latest details directly on the ICF website before making decisions.

What does "formative" actually change?

The clearest statement of the shift is in the ICF Mentor Coach Handbook's comparison of the mentor coach with the coach assessor:

"Coach assessors are strictly focused on evaluating observable behaviors (i.e., the Minimum Skills Requirements) whereas mentor coaches focus on development of Core Competencies, including both observable and non-observable behaviors through formative evaluation of the coach's skill demonstration over a period of time. ... Coach assessors only assess a snapshot of the coach's skill level based upon a single coaching session." (ICF Mentor Coach Handbook)

The assessor delivers a summative judgement; the mentor coach runs a developmental process. ICF's change announcement makes the rationale explicit — "coaching competence doesn't happen in a single moment. It develops through practice, reflection, feedback, and growth over time" — and notes that the new approach "reduces pressure associated with high-stakes, single-session assessments." (ICF)

The vocabulary itself has a long pedigree: the formative/summative distinction comes from educational evaluation (Michael Scriven coined it in 1967; Benjamin Bloom brought it into teaching), where decades of research — most famously Black and Wiliam's work on formative assessment — established that feedback during learning moves skill far more than a grade at the end. ICF is, in effect, adopting the settled position of assessment science for coach development.

The structure follows the philosophy. The mentor coaching requirement remains 10 hours over at least three months — ICF specifies that "12 full weeks must pass between the first and final mentor coaching sessions" — with at least 3 hours one-to-one, and a recommended two weeks between sessions "to allow for this cycle of reflection, learning, and practice," a cycle ICF explicitly adapts from Kolb's experiential learning model. The Mentor Coaching Competency Model hard-codes the longitudinal view into Competency 4 ("Conducts Formative Appraisals"), which asks the mentor coach to identify "trends in the mentor coaching client's behaviors and competence across sessions to determine skill development."

The Session Observation Form: what you must write, every session

From January 1, 2027, the Session Observation Form (SOF) is "required for use with mentor coaching clients" — one form "for each coaching session observed as part of one-to-one mentor coaching," whether the session is observed live or via audio/video recording. (ICF publishes level-specific versions for ACC, PCC, and MCC; the details below are from the PCC form.)

The PCC SOF walks marker by marker: each PCC Marker under Competencies 3–8 is rated Observed / Not Observed with a free-text "Evidence of Marker Demonstrated" field. Competency 1 (Ethical Practice) is a gate — failure to demonstrate its two behaviors "will require additional mentor coaching... even if the required skills are otherwise demonstrated at the PCC level." Competency 2 (Coaching Mindset) is not rated directly because it "cannot be fully captured in a single moment in time"; it is evidenced through markers across the other competencies.

Then comes the part the September Community of Practice conversation is really about — the feedback section:

"Please provide detailed feedback based on the observed coaching session. This includes a minimum of 2-3 areas of strength and 2-3 areas for development, accompanied by evidence (timestamps from a transcript, quotes from the coaching conversation, or what the coach may have said in a live session) and written feedback based on your observations of the competencies." (PCC Session Observation Form)

A few mechanics that are easy to miss:

• Evidence is not optional. ICF instructs mentor coaches to "list evidence from the session, such as timestamps or quotes, to support your selected rating option" — and if a live session wasn't recorded, to state explicitly that no timestamps exist.
• The client is in the loop, twice. The form includes a client pre-review reflection (completed before the mentor session) and a post-review reflection (afterwards, naming "2-3 skills for your continued development"). The mentor coach attests to having discussed both, and to having "reviewed the completed Client Session Observation form in real time" with the client. Feedback is delivered with the coach, not filed about them.
• Both channels, every session. The Handbook lists "verbal and written feedback from the mentor coach about the client's strengths and development areas" as a required element of each one-to-one session.
• Timing matters. ICF's recommended best practice is to review the coaching session within two business days of the review conversation, "to support the delivery of meaningful feedback."
• The written work is off the clock. ICF is explicit that "time spent reviewing the recording and/or taking notes does not count towards the mentor coaching hours" — the documentation load lands on the mentor coach's own time.

The Competency Review Form: cumulative, traceable, decisive

Where the SOF captures single sessions, the Competency Review Form (CRF) documents "a mentor coaching client's cumulative demonstration of coaching skills across multiple observed coaching sessions." Two design choices show how seriously ICF takes the longitudinal principle:

1. Traceability. "Any skills documented in the Competency Review Form must also be documented in the appropriate Session Observation Form completed by the mentor." The final picture must be built from the per-session record — no impressionistic sign-offs.
2. Different language for a different judgement. The per-session rating is Observed / Not Observed; the cumulative rating becomes "Proficiency Demonstrated" / "Proficiency Not Yet Demonstrated" — and a skill counts as demonstrated if it was observed in any of the session observation forms. Development over time is the unit of assessment, not any single performance.

The PCC CRF sets a concrete bar: "at least two-thirds (67%) of skills in each competency must be demonstrated at a competent level to meet the requirements for the respective credential level." It also asks for cumulative written feedback — "clear, evidence-based feedback... for 2-3 competencies for both strengths and opportunities for development" — a session log, and a closing attestation that "the mentor coaching client has reviewed this form, and we discussed the feedback provided in real time."

For ACC and PCC Portfolio applicants from April 1, 2027, this CRF is what gets uploaded with the application in place of the old recording-plus-transcript; the SOFs behind it are retained and submitted only if the application is audited. Coaches working with more than one mentor at the same level should hand the completed CRF to the next mentor coach — the paper trail is designed to follow the coach, not the engagement.

How do I give formative feedback with clarity, care, and integrity?

That phrasing — clarity, care, integrity — is how the practitioner community itself is framing the question this autumn. ICF's published guidance gives more of an answer than many mentor coaches expect.

Start from ICF's stated purpose. The Handbook's feedback guidelines say feedback "should be designed to reinforce coaching competencies and skills, expand a coach's strengths, identify opportunities for development, and provide clear, actionable areas for growth," delivered in a way that is "fair, consistent, and grounded in observable coaching behaviors." Two competency behaviors sharpen the how: share observations "in a non-judgmental style to foster learning and growth" (5.5), and support the client "to integrate new learning with their unique coaching style" (5.7) — formative feedback develops their coaching, it doesn't clone yours.

Anchor every judgement in evidence. The forms make this structural: a rating without a timestamp or quote is incomplete. This is also what protects the relationship — "you filled the silence at 14:32 and again at 27:10" is discussable; "you talk too much" is an attack on identity. A useful mental model from the feedback literature ICF's approach echoes is Hattie and Timperley's three questions: Where am I going? (the credential-level behaviors), How am I going? (evidence from this session), Where to next? (the 2-3 development areas). A written feedback block that answers all three is doing its job.

Calibrate the dose. ICF's own guidance is unusually human here: "consider their personality and sensitivity level when providing feedback. Some mentor coaching clients may require a more sensitive approach than others," and "find a balance between stretching them to learn without overwhelming them with unrealistic expectations." The SOF's minimum of 2-3 strengths alongside 2-3 development areas builds the balance into the paperwork.

Keep the whole session in view. ICF warns against a purely segmented reading: "while focusing on individual competency areas is important, don't forget to consider the entire coaching session when reviewing session feedback." Which leads to the first of two tensions worth naming.

Two tensions ICF itself names

Markers are mandatory — and must not become a formula. The same Handbook that requires marker-by-marker documentation states, of the Minimum Skills Requirements: "These resources should not be used for the following purposes: As coaching competencies. As a checklist or formula for coaching." The Core Competencies "should be the primary focus of the Mentor Coaching feedback." Holding both instructions at once is the real skill of the new model: the marker sheet is your evidence instrument; the competency — and the coach's development — is your subject. Mentor coaches who narrate sessions as marker bingo will be compliant and useless; the form's free-text feedback fields exist precisely so the numbers don't speak alone.

The developer now also decides. Under the old model, the summative call belonged to an anonymous assessor. Under the new one, the person who spent three months developing the coach also marks "Proficiency Not Yet Demonstrated." ICF's ethics guidance names the risk directly: holding developmental and evaluative roles at once "may raise concerns about power relations, bias, fairness and equity, and hence perceived conflicts of interest," and calls for transparency about multiple roles plus "a channel for raising concerns." The Handbook adds that in skill evaluation, "bias is not simply a personal flaw, but rather an inevitable result of human cognition and social conditioning" — managing it is framed as a core mentor coach duty, and the SOF has the mentor coach attest to having no conflict of interest with the client. Contract for this openly at intake: name both hats, explain the evidence trail, and agree on what happens if the cumulative picture falls short.

What hasn't been published yet

Being precise about the edges of the published guidance is part of giving honest feedback about the model itself:

• No published remediation pathway. ICF documents do not yet spell out a standard process after a "Proficiency Not Yet Demonstrated" determination beyond continued development with a mentor coach.
• No published calibration mechanism. How consistency between MCS mentor coaches will be maintained — the role the centralized assessor pool played — is not described in the public documents. ICF references an Evaluation Feedback Guide and a Bias Awareness Guide, but both live inside the MCS evaluation trainings rather than in public.
• Live discussion is happening in member spaces. The ICF Mentor Coaching Community of Practice is free for ICF members and is currently the main venue where these open questions are being worked through.

Treat these as gaps to watch, not reasons to wait — the January 1, 2027 form requirement arrives regardless. (If your question is whether to finish mentor coaching before then, we've mapped that decision here.)

Where evidence preparation fits

Everything above points at one practical bottleneck: formative feedback lives or dies on evidence per observation — timestamps, quotes, marker-level notes — produced within about two days of every observed session, on the mentor coach's own unpaid time. That review workload, multiplied across a practice, is the unglamorous center of the 2027 model. It is also exactly the layer where tooling honestly helps: Mentor Coaching AI analyses a session recording or transcript against the ICF Core Competencies and produces timestamped, competency-tagged evidence — so the mentor coach arrives at the review conversation with the observational raw material mapped, and spends the session on the part only a human can do: the dialogue, the calibration, the care. A free competency analysis of a real session is a low-stakes way to see what evidence-first preparation looks like.

The forms don't change who gives the feedback. They change what the feedback must be built on.

FAQ

Are the Session Observation Form and Competency Review Form required for renewals too?

No. The Handbook notes the forms are not required for credential renewal, though ICF adds they "can be useful tools for development." The requirement applies to mentor coaching with credentialing clients from January 1, 2027.

Does written feedback replace verbal feedback?

No — ICF requires both. The Handbook lists "verbal and written feedback" as an element of every one-to-one mentor coaching session, and both forms carry attestations that the written record was reviewed with the client in real time.

How many sessions must actually be observed?

For ACC and PCC Portfolio applicants under the new model, ICF states at least three coaching sessions must be observed and reviewed within the mentor coaching engagement. A Session Observation Form is completed for each observed session.

Is there a recency requirement for the observed sessions?

The PCC Session Observation Form states explicitly that "there is no recency requirement for client coaching sessions" — a notable contrast with the old Performance Evaluation's recording rules. See our recording and transcript guide for how the submission requirements compare.

What happens if my mentor coach marks "Proficiency Not Yet Demonstrated"?

ICF has not published a standardized remediation pathway. The form-level guidance points to continued mentor coaching until proficiency is demonstrated; discuss the scenario with your mentor coach at contracting, not at the end.

Do MCC candidates use this formative route instead of a performance evaluation?

No. The April 2027 replacement applies to the ACC and PCC Portfolio paths. ICF's performance evaluation requirements for MCC applications (two recordings with transcripts) remain listed unchanged. See the full changes timeline.

Sources

• ICF — ACC & PCC Performance Evaluation Changes
• ICF Mentor Coach Handbook (PDF)
• ICF Mentor Coaching Competency Model (PDF)
• ICF — PCC Session Observation Form
• ICF — PCC Competency Review Form
• ICF — Insights and Considerations for Ethics (PDF)
• ICF — Introducing the Mentor Coach Specialization
• ICF — Mentor Coaching Community of Practice
• Hattie & Timperley — The Power of Feedback (2007)

If you mentor coaches — or will from 2027 — try the workflow once before the rules require it: take one recorded session (with consent), write feedback with 2-3 strengths and 2-3 development areas, each anchored to a timestamp. Then run the same session through a competency analysis and compare notes. That comparison is the fastest calibration exercise available today.