How to measure the effectiveness of mentoring? KPIs, metrics and data that really matter

Mentoring is increasingly appearing in organizations as part of a development strategy – whether in companies, universities or industry organizations. This can also be seen in the growing number of programs and participants. But with this growth comes a very specific question: how to measure the effectiveness of mentoring and whether it actually brings business value?

This is not just a matter of curiosity. We know that for HR it’s often a real need – justifying the budget, decisions about scaling the program and its further development. That’s why mentoring is increasingly ceasing to be a “soft initiative” and starting to be treated as a full-fledged development tool that needs to be measured and optimized.

If you want to better understand what mentoring is and how it works as a process, this article is also worth a look.

Why is measuring the effectiveness of mentoring a challenge?

Mentoring is different from many other HR activities. It is not a training course that ends with a knowledge test or a workshop with a clearly defined output. It is a relational process, based on conversation, reflection and working on the participant’s real challenges.

So, on the one hand, we have hard effects like retention and promotions. On the other hand, there are changes that are harder to grasp:

• greater confidence,
• better career decisions,
• A higher sense of meaningful work.

This leads many organizations to make the mistake of either not measuring mentoring at all, or limiting themselves only to participant satisfaction. Meanwhile, an effective approach requires looking more broadly.

Mentoring KPI – what is worth measuring?

The best organizations do not rely on a single indicator. The effectiveness of mentoring is measured on several levels simultaneously, because only then can you see the full picture.

1️⃣ KPIs of participant experience

This is the first and most intuitive level. It includes how participants evaluate the program and the mentoring relationship.

Worth measuring:

• satisfaction with the program,
• pair-matching assessment,
• NPS of mentoring,
• Willingness to recommend the program to others.

Why is this important? Because mentoring is based on a relationship. If it does not work, even the best-designed process will not work.

Mentiway data shows that:

• 95% of participants positively evaluate mentoring,
• The NPS of mentoring is as high as 78.

This shows that well-designed mentoring can be one of the best-rated development activities in an organization.

2️⃣ Development KPIs (Learning & Development)

This is a level that is particularly important for HR and L&D departments. Here we measure whether mentoring actually develops people – not just gives them a good experience.

In practice, this means analyzing such areas as:

• competence development,
• increase in self-awareness,
• Clarity of career goals,
• decision-making capacity.

Mentoring works differently here than training – it does not impart knowledge “directly”, but helps to organize it and set it in the context of the work. Therefore, the effects are often deeper and more lasting.

In the context of working on goals, it is also worth taking a look at the article: mentoring goals – essence, techniques and examples – because goals are one of the key elements that can and should be measured.

3️⃣ KPIs of engagement and motivation

This is one of the most important areas – especially today, when global figures show a decline in employee engagement.

Mentoring works exactly where the problem arises:

• helps to find the meaning of work,
• Strengthens the relationship with the organization,
• gives space to talk about real challenges.

The Mentiway report shows that as many as 65% of participants cite increased motivation and engagement as one of the key benefits of mentoring.

This is very important, because it shows that mentoring affects not only the development, but also the daily functioning of the employee – his energy, initiative and approach to work.

4️⃣ Business KPIs

This is the level that boards and decision-makers are interested in. Does mentoring translate into real business results?

One can analyze here:

• employee retention,
• internal promotions,
• succession,
• Reducing onboarding time,
• team results.

However, it is worth remembering that mentoring rarely works in isolation. It is best to analyze its impact in combination with other HR activities.

5️⃣ KPIs of the mentoring process

This is an area often overlooked, but very important. Even the best program will not work if it is not well “proven” operationally.

That’s why it’s worth measuring:

• The number and regularity of sessions,
• The level of achievement of goals,
• participant activity,
• The quality of the matching of mentoring pairs.

If you’d like to better understand the importance of pair matching, see Pairing Mentees with Mentors – Effective Pairing in Mentoring.

How to build a mentoring measurement system?

In practice, an effective mentoring measurement system doesn’t have to be complicated – but it does need to be well thought out.

To begin with, it is worth answering one question: why are you implementing mentoring at all?

Everything depends on it:

• other KPIs will be for the leadership program,
• others for onboarding,
• others for young talent.

A good system can be created according to five simple rules:

1. Defining the purpose of the program.
2. Selecting 3-5 key KPIs.
3. Collecting data on an ongoing basis (not just at the end).
4. Analyzing the results and drawing conclusions.
5. Optimizing the next editions of the program.

This approach is consistent with how mentoring is designed as a process – iterative and based on continuous feedback. If you want to learn more about who mentoring is for and how it is implemented, read this article.

Most common mistakes in measuring mentoring

The same problems arise in many organizations:

• Focusing only on participant satisfaction,
• Failure to link mentoring to business goals,
• Lack of regular data collection,
• Treating mentoring as a “nice to have.”

In practice, this means that mentoring functions alongside the organization, rather than as an integral part of it. The program may be well appreciated by participants, but if it is not clear what impact it has on competence development, engagement or retention, it is difficult to defend it to management and develop it in subsequent editions. A common mistake is also to measure the effects only at the end of the process. Then the whole context is lost – we don’t know what worked well and what needs improvement over the course of the mentoring. A much better approach is to collect data on an ongoing basis, such as after sessions or midway through the program.

Another problem is the lack of clear assumptions at the start. If an organization does not define what it wants to achieve with mentoring, it is very difficult to select meaningful KPIs later on. As a result, “everything and nothing” is measured, instead of a few key indicators.

One less obvious problem is also worth noting: the lack of qualitative data. Numbers alone won’t show the full picture – mentoring is a process based on experience and relationships, so it’s worth supplementing KPIs with descriptive feedback, participant conclusions or cases. The effect of all these mistakes is similar: mentoring works, but it is not visible as a real impact tool. And this means that the organization is not using its full potential.

How does Mentiway support the measurement of mentoring effectiveness?

One of the biggest challenges is not the implementation of mentoring itself, but its maintenance at a high level of quality – especially at a larger scale.

That’s why at Mentiway:

• We collect data at the level of the entire process,
• We monitor the progress of mentoring pairs,
• We analyze the effects of the programs,
• We provide reports for HR and business.

In this way, mentoring ceases to be an “on the fly” activity and becomes a process that can be measured, analyzed and developed. You can read more about how the app supports mentoring program management in this article.

Summary: how to measure mentoring so that it makes sense

Above all, it is worth remembering this one tip: The effectiveness of mentoring is not about one KPI – it is about a well-designed measurement system.

The most important thing is the connection:

• participants’ experiences,
• real development,
• Engagements,
• and business impact.

The data shows clearly: mentoring works. But only when it is well designed and measured does it become a viable tool for impacting the organization.

If you want to see how mentoring works as part of a broader development strategy, this article is also worth a look.

FAQ – mentoring effectiveness

How to measure the effectiveness of mentoring?

Preferably through a set of KPIs including participant experience, competency development, engagement and business metrics.

What mentoring KPIs are the most important?

Most common: program NPS, engagement level, competency development and employee retention.

Can mentoring be measured in ROI?

Yes, but indirectly – by affecting retention, promotions and productivity.

How often to measure the effects of mentoring?

On an ongoing basis (e.g., after sessions) and at the end of the mentoring process.

Does mentoring work in any organization? Yes – provided it is well-designed, tailored and properly measured.