National NHS turnover has eased. The leaver rate currently sits at around 10% - one of its lowest levels in over a decade and well below the 12.5% peak following the pandemic. That is a real achievement, and a credit to the NHS People Promise and the trusts that have invested in retention.

But headline turnover hides a sharper story. In our cross-trust dataset of 4,735 NHS leavers, 44% are leaving because of dissatisfaction with their job, their organisation, or both. The ‘unhappy leaver' rate varies from 33% to 55% between trusts, reflecting material differences in local workforce environments. Those leaving avoidably are disproportionately mid‑career, mid‑tenure clinical and professional staff — the NHS's backbone.

Replacing them is expensive. NHS-published analysis puts the cost of replacing a fully trained nurse at up to £12,000 and the wider cost of poor staff health, wellbeing and turnover at over £12bn a year. The avoidable share of that bill is the prize. This is a board issue, not an HR one.

The devil in the detail

As with all data, you need to dig below the aggregate figures given above. When we disaggregate by staff group, the picture sharpens. Unhappy leaver rates vary materially across occupational groups:

• managerial (59% unhappy leavers): frustration with restructures, span of control and the gap between accountability and authority — the highest avoidable-loss rate in the dataset
• scientific and technical (53%): strong pull from highly transferable digital, analytics, laboratory and pharmacy roles, combined with dissatisfaction over service direction and development
• admin and clerical (50%): stuck in banded roles with limited routes upward, repeatedly affected by restructures and often feeling undervalued versus clinical colleagues.
• allied health professionals (49%): a two-sided story — high job satisfaction and meaningful patient relationships, undermined by limited progression routes and rising caseload pressure
• registered nursing and midwifery (46%): strong signals around workload, safe staffing, well-being and limited clinical career pathways. Many leavers describe their decision as reluctant rather than opportunistic
• nursing support and additional clinical services (38%): workload and physical demands dominate, alongside pay-versus-responsibility concerns and a sense of being at the bottom of the ladder.
• medical and dental (23%): the lowest unhappy rate — most exits are career-stage moves between rotations, fellowships and specialty changes, with pockets of strain in pressured specialties.

Risk peaks for staff in their late‑30s to mid‑40s, when many carry senior responsibility and family caring commitments alongside prolonged exposure to system strain. Dissatisfaction is highest among women, minority ethnic staff, disabled colleagues and those with caring responsibilities, particularly where these characteristics intersect.

Why they leave

The drivers are remarkably consistent across organisations and staff groups. In our cross-trust dataset, the strongest exit drivers cited by unhappy leavers as a major factor in their decision to leave are co-operation and team climate (36%), well-being (35%), personal growth and career progression (each 34%), and line manager relationship (32%). Organisational confidence (29%), working conditions (23%) and reward and recognition (20%) follow. This aligns closely with the wider evidence base — The Health Foundation, The King's Fund and the most recent systematic review of NHS workforce exits all point to the same cluster of push factors: workload and staffing, limited progression, work–life balance and local culture.

‘I am proud of the care we provide but constant shortages meant the job became unsafe and unsustainable.'

Crucially, free‑text data also adds a dimension that headline turnover never captures. A meaningful minority of unhappy leavers reference bullying, harassment, discrimination or favouritism in their own words - a culture and conduct signal that does not surface in standard staff survey scores, and one that becomes materially more important as the Worker Protection Act and tightening regulator expectations bite.

Why retention isn't an HR problem

Line managers are the critical hinge between policy and lived experience. Regular feedback, role clarity and development conversations are the strongest differentiators between engaged staff and those at risk of leaving - and the variation in experience between teams within the same trust is driven more by local management practice than by central policy.

That makes retention an operational and clinical leadership issue, not an HR one. The NHS Long-Term Workforce Plan and successive NHS Staff Surveys are explicit: supportive management, role clarity and feeling valued correlate strongly with intention to stay and lower clinical turnover is associated with better patient outcomes - including, in published research, lower mortality risk on wards exposed to days of low or temporary staffing. Retention is patient safety, agency spend, sickness absence and team performance, all in one.

What works

The evidence - ours and others' - points to a small number of high-leverage interventions. None of them are new. What is new is the ability to target them precisely using real workforce signals. Worth noting upfront: even among unhappy leavers, around half would consider returning. The NHS is not losing critics; it is losing disappointed advocates.

• visible, fair internal career pathways — band-to-band progression, specialist and advanced practice routes, transparent criteria, and bias-aware processes. Career progression is the most consistent driver of avoidable turnover across every staff group
• manager capability and cadence — a predictable rhythm of feedback, performance clarity and development conversations. This is the single biggest lever in our onboarding data and it disproportionately benefits higher-risk groups including disabled staff and clinical trainees
• employee voice that closes the loop — stay interviews, pulse checks and leaver intelligence fed back into visible action. The NHS People Promise pilots showed that local listening, e-rostering and flexible working were the strongest contributors to lower leaver rates among exemplar trusts
• employee empowerment in the digital and AI shift — bringing staff with you on the new ways of working that automation, AI and digital transformation are introducing, rather than letting change happen to them. Communication and involvement in change is one of the recurring leaver themes; it is also one of the easiest to fix.

A practical framework: the 5Cs

We use a simple lens to map intervention to signal: Commitment, Compensation, Career Growth, Culture and Communication. Commitment is about purpose, belonging and team climate — the strongest assets the NHS already has. Compensation extends beyond pay to reward, recognition and the perceived fairness of what is given for what is asked. Career Growth covers visible pathways, development funding and internal mobility. Culture is line management behaviour, psychological safety, fairness and inclusion. Communication is how change lands, how voice is heard and how the loop is closed.

Each of the five maps directly to themes in our cross-trust data, which means a board can see not just where it sits on each, but what specifically to do about it. The framework is deliberately not prescriptive — the right intervention depends on staff group, trust type and where pressure is concentrated. The point is that retention strategy stops being a generic plan and starts being a targeted one.

From one-off survey to always-on retention system

This is where the collaboration of NHS SBS with great{with}talent matters. NHS SBS sits inside the NHS operating fabric — workforce processes and systems, payroll, workforce analytics and established consulting relationships across trusts. It brings the HR expertise to flag flight risk before it converts into a resignation and to transform ways of working in support of efficiency, cost control and the retention of top talent. great{with}talent brings the lifecycle intelligence that explains why: structured listening at the moments that matter most, when people join (OnBoarder), while they are with you (WinningFormula), and when they leave (LastOpinion).

Together, that combination shifts retention from one-off survey to always-on system: signal flowing from joiner experience to in-role engagement to leaver intelligence, fed back into predictive models and consulting support that helps trusts act. It is particularly relevant for the ambulance service trusts, who account for around 70% of the bottom 20 organisations in the most recent national Staff Survey. We have applied versions of this approach with NHS trusts and seen meaningful reductions in early attrition and uplifts in new-starter engagement; the gain comes from the system, not from any single survey or platform.

A closing thought for CPOs

Retention is no longer a workforce sub-strategy - it is a board-level systems issue. The trusts getting ahead are connecting listening, line management and career architecture into a single operating rhythm and using data and technology to make that rhythm precise rather than generic. The signal is already in the system; the question is whether we are willing to act on what it tells us.