More than a third, or 36% of HR directors in the UK have seen employee turnover rise over the past three years, according to new research by Robert Half UK.

The research found that boredom and frustrations with their current role or company (35%), poor work-life balance (31%) and stagnant career prospects (30%) are the key reasons why employees choose to move on according to HR directors.

Boredom has been identified as a main reason for staff turnover across companies of all sizes but employees in large businesses are particularly affected by this, with almost half (42%) naming it the key reason for staff turnover, compared to 27% in small companies and 35% in medium-sized ones.

“UK businesses are beginning to realise that they need to prioritise the implementation of effective retention strategies as their current efforts have been unsuccessful in addressing the underlying causes of voluntary staff turnover,” Phil Sheridan, Senior Managing Director at Robert Half UK, said. “At a time where the labour market is very competitive and highly-skilled employees are in short supply, organisations need to ensure they look after their staff. With the productivity agenda a high priority for business leaders, considering employee happiness and well-being will promote loyalty.”

According to Robert Half, companies are employing several different retention methods to reduce employee turnover including flexible working arrangements (63%) and competitive salary packages (45%). Other common retention strategies include career development and training (33%), internal promotions (30%) and counteroffers (14%).

"At the end of the day, employees are a company’s most important resource, regardless of its size or sector. Losing staff because they feel unhappy and unmotivated can be avoided if businesses develop a strategy which incorporates staff wellbeing initiatives alongside career planning and, above all, nurtures a positive company culture," Sheridan said.

Despite the retention methods used, most companies fail to directly tackle the issue of workplace-related boredom, which leaves the underlying driver of employee attrition unaddressed, according to Robert Half. Giving employees meaningful and worthwhile work has been shown to make them 3.2 times more likely to be happy at work and, consequently, less likely to leave.