Mental health helpline metrics: how to measure impact, lift usage and compare providers

Most organisations can tell you they have a 24/7 mental health helpline. Far fewer can tell you whether it is actually working.

And that gap matters. When it comes to renewing a contract, showing your finance team the value, or simply knowing whether your people are getting the help they need, "we have a helpline" is not really an answer. The real question is what that helpline is doing for your people, and whether you can show it.

The good news is that impact is measurable. You do not need a data science team to do it well. You need the right metrics, an honest read of what they tell you, and a clear sense of what good looks like when you are comparing providers. Here is how to think about all three.

Key takeaways

• Measuring a mental health helpline well means looking at four layers: usage and access, wellbeing outcomes, business outcomes, and employee experience. Usage alone shows reach, not impact.
• Validated tools such as PHQ-9, GAD-7 and WEMWBS, taken before and after support, show whether people genuinely feel better.
• Low usage is usually a sign that support is hard to find, trust or reach, not proof that your people are well.
• When comparing providers, look past engagement rates and price to the quality of support and the honesty of the reporting.
• Support works hardest when it reaches people early. Deloitte found preventative support returns £6.30 for every £1 invested.

Why measuring your helpline matters

Poor mental health costs UK employers an estimated £51 billion a year, according to Deloitte's 2024 analysis. The largest cost is presenteeism, where people are at work but struggling to perform, at around £24 billion. Staff turnover accounts for roughly £20 billion, and absence for around £7 billion.

Those are big numbers, and they are easy to feel powerless against. The more useful figure is the one that shows support pays back. Deloitte found that employers see an average return of £4.70 for every £1 invested in mental health. Crucially, the return is highest when support is preventative and available to everyone, at £6.30 per £1, compared with £4.20 for proactive support and £4.10 for reactive support that only kicks in once someone is already struggling.

The pattern is clear. Support that reaches people early, before a hard moment becomes a crisis, works hardest. A helpline sits right at that sharp end, there for people when things feel most urgent. Measuring it well is how you learn whether the rest of your support is doing its job too.

How do companies measure the impact of a mental health helpline?

Companies measure helpline impact by combining four layers of data, not one: usage and access, wellbeing outcomes, business outcomes, and employee experience. Usage on its own can mislead you. A fuller picture comes from putting all four together.

1. Usage and access

Most reports start and stop here, which limits what they can actually tell you. On its own it says very little, but it is still the foundation.

• Engagement rate. The share of your workforce who use the service in a given period. Industry bodies put the average at around 10%, yet usage often stays low even where support is widely offered. It is also measured inconsistently across the market, so always ask a provider exactly how they define it.
• Speed of access. How quickly a call is answered, and whether the person speaks to a qualified professional straight away or is passed through triage, call-backs and signposting first. Time to real support is a metric in its own right.
• Resolution in the moment. What share of contacts are helped there and then, rather than referred elsewhere to wait.

Usage answers "are people reaching us?" It cannot answer "are we helping them?" For that you need the next layer.

2. Wellbeing and clinical outcomes

This is the layer that really matters. Validated tools let you see whether people genuinely feel better after reaching out, using the same measures clinicians trust.

• PHQ-9 measures symptoms of depression on a scale from 0 to 27.
• GAD-7 measures anxiety symptoms on a scale from 0 to 21.
• The Warwick-Edinburgh Mental Wellbeing Scale (WEMWBS) measures general wellbeing.

Taken before support begins and again afterwards, they show you whether someone genuinely feels better, rather than leaving you to guess. They are widely used because they are quick, well validated and sensitive to change. If a provider cannot show you outcome data like this, they are measuring activity, not impact.

3. Business outcomes

These are the metrics your finance team and board will care about most, because they connect wellbeing to the numbers that run the business.

• Absence. Mental ill health is now the top cause of long-term absence in the UK, and average absence has risen to 9.4 days per employee per year, up from 7.8 days in 2023. Tracking absence before and after you introduce support shows whether it is moving.
• Productivity and presenteeism. Harder to measure, but often the biggest cost. Pulse surveys and simple self-reported focus or energy scores help you build a picture.
• Retention. The intention to stay is a strong early signal, well before someone actually hands in their notice.

For a fuller view of how to frame this for budget holders, our guide for finance teams sets out the numbers side in more detail.

4. Experience and trust

Finally, the human layer. Numbers tell you what changed. Experience tells you why, and whether people trust the service enough to come back.

• Satisfaction and employee net promoter score, asked after support.
• Qualitative feedback, collected anonymously. A single honest line, such as "the best hour I have spent in a long time," can carry as much weight in a board pack as a percentage.
• Repeat and referral behaviour, which shows whether people found it worth returning to.

Put the four layers together and you can answer the question that matters: not "did people call?" but "did calling help, and did it show up in the business?"

Why do employees underuse workplace mental health helpline services?

Employees usually underuse mental health helplines not because they lack need, but because of a handful of very human barriers. This makes low usage one of the most misread metrics in the whole field.

It is tempting to see a low engagement figure and conclude that people do not need support. The evidence points the other way. Demand for mental health support is rising, not falling. What holds people back tends to be four things.

• Awareness. People cannot use what they do not remember they have. One UK study found that while 76% of organisations now offer access to support such as an EAP, take-up stays low, often because it was mentioned once at induction and rarely again.
• Stigma and fear. Many people worry about being judged, or about consequences for how they are seen at work. Fear of negative consequences is consistently among the biggest reasons people hold back from using support.
• Confidentiality worries. If people are not certain a call stays private, many will not make it.
• Access friction. If reaching support means triage, call-backs, forms or a wait, some people quietly give up before they get there.

This reframes low usage entirely. A quiet helpline is not proof that your people are well. It may be a sign that the service is hard to find, hard to trust, or hard to reach. That is why the access metrics in layer one matter so much, and why the way you communicate support, repeatedly and warmly rather than once a year, is part of the service, not an afterthought.

A few of our essential pulse survey questions can help you gauge whether people even know what is on offer, which is often the first thing worth measuring.

How should HR compare different 24/7 mental health helpline providers?

To compare providers well, look past engagement rates and headline pricing, which are the easiest things to compare and the least useful on their own. These are the questions that separate a helpline that ticks a box from support that genuinely changes how people feel.

Who answers the phone, and how quickly? Look for qualified, accredited professionals, for example counsellors accredited by the BACP, answering in the moment rather than a call handler taking a message. Ask what happens at 3am on a Sunday, not just during office hours.

What happens on the call? The best support assesses risk and helps there and then. Ask whether people are routed through triage, call-backs and signposting, or supported immediately.

What can they actually report back? Ask to see a sample report. Does it show only call volume, or does it include anonymised outcome data, wellbeing change and themes you can act on? If a provider only counts calls, they can only prove activity, not impact.

Does it join up with everything else? A helpline catches urgent moments. On its own it is reactive by design. The strongest setups connect that safety net to proactive, ongoing support such as 1:1 sessions and coaching, so people are supported from a difficult moment all the way through to recovery and growth, rather than being handed off and left to wait.

Does the scope match your people? One provider that covers the full spectrum, from an urgent late-night call to longer-term support, is easier to measure, easier to communicate and easier for employees to trust than a patchwork of separate services.

Will people actually use it? Accessibility, warmth and confidentiality are not soft extras. As the underuse barriers above show, they are the difference between a service people reach for and one they never open.

The bottom line

A mental health helpline is worth measuring properly, because measurement is how you turn "we offer support" into "here is the difference it made."

Track all four layers, usage, outcomes, business impact and experience, and read low usage as a prompt to look harder rather than a reason to relax. When you compare providers, look past the engagement percentage to the quality of the support behind it and the honesty of the reporting in front of it.

Most of all, remember what the return figures tell us. Support works hardest when it reaches people early and connects up around them. A helpline is a vital safety net, and it does its best work as part of something more proactive, not on its own.

If you would like to see how joined-up support and reporting can work in practice, you can explore our 24/7 helpline or book a short demo.

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