New research shows replacing an employee can cost over £30,000, with indirect costs like lost productivity and morale hitting Northern Ireland businesses hardest
From better onboarding to ongoing development, practical strategies can help employers reduce turnover, protect productivity, and retain valuable expertise
Employee turnover is expensive. From senior leadership roles to entry-level positions, replacing staff comes at a high cost for businesses across Northern Ireland, and many employers still underestimate just how much it adds up.
While the exact cost of turnover varies by role and sector, research shows the scale of the issue. A joint study by Oxford Economics and Unum estimated that replacing an employee in the UK costs over £30,000 on average. For employers in Northern Ireland, where labour markets can be smaller and specialist skills harder to source, the real cost can be even higher.
These costs fall into two broad areas. The first is direct costs. These include recruitment advertising, agency fees, interview time, and the training and onboarding of new staff. The study estimated these direct costs at around £5,400 per hire. Given inflation and increases in the National Minimum and Living Wage since the research was published, this figure is likely higher today, particularly for Northern Ireland employers competing for limited talent.
The second and more significant area is indirect cost, which relates to lost productivity. This was estimated at over £25,000 per employee and reflects the time a role remains vacant as well as the period before a new hire reaches full effectiveness.
When an employee leaves, productivity does not simply dip. It often turns negative. The remaining staff are required to take on additional responsibilities, spreading their time and energy more thinly. This can slow progress across teams and place pressure on already stretched resources, which is a common challenge for many Northern Ireland organisations.
There is also a loss of knowledge and expertise. Employees take with them an understanding of ongoing projects, client relationships, internal processes, and informal ways of working that are rarely documented. Rebuilding this knowledge takes time, and in more complex roles, the period of reduced productivity can last for months.
Turnover also affects morale. Increased workloads, uncertainty, and concerns about leadership or organisational direction can reduce engagement among remaining staff. In some cases, this creates a ripple effect, where further employees begin to disengage or consider leaving. For larger employers and public-facing organisations in Northern Ireland, this can have a direct impact on service delivery and performance.
Recent data suggests this issue is becoming more pressing. The Office for National Statistics Business Insights and Conditions Survey reported that one in seven UK businesses saw an increase in staff turnover in November 2025, with many expecting this trend to continue. While this data covers the UK as a whole, Northern Ireland employers face many of the same pressures, including work-life balance concerns, limited progression opportunities, and skills mismatches.
There are, however, practical steps that organisations in Northern Ireland can take to reduce unnecessary turnover and limit its impact.
One of the most effective measures is improving onboarding. The early weeks of employment are critical in shaping how quickly a new starter becomes productive and how connected they feel to the organisation. Poor onboarding can lead to confusion, slow progress, and early disengagement. The CIPD Resourcing and Talent Planning Report 2024 found that more than one in five recruiters struggle with onboarding new hires. Clear role expectations, structured induction plans, and active managerial support can significantly reduce the time it takes for new employees to contribute effectively.
Retention efforts must also extend beyond the onboarding phase. Once employees are settled, ongoing development and engagement become key. The CIPD Good Work Index 2025 found that employees who see opportunities for development are less likely to leave within the next year. Even where promotions are limited, visible investment in skills development and regular feedback helps employees feel valued and motivated. For Northern Ireland employers, this can also support internal mobility, reducing the need for external recruitment and helping retain valuable institutional knowledge.
Finally, using data to identify issues early can prevent turnover before it happens. Changes in absence patterns, workload management, engagement levels, or performance often appear well before a resignation. Consistent tracking of this data, supported by HR systems, allows managers to spot emerging problems and take action. Adjusting workloads, offering support, or realigning expectations early on can make a significant difference.
For Northern Ireland businesses, where replacing staff can be both costly and time-consuming, preventing employee turnover is far more effective than reacting to it. A cohesive approach that supports employees from their first day through to long-term development helps protect productivity, strengthen culture, and safeguard budgets. Retention, done well, is an investment that delivers lasting returns.