The number of workers without access to workplace benefits has dropped by around one million over the last 12 months, according to research.
Using ONS Labour Market Statistics, Canada Life calculated that around 26% of the UK working population still had no access to workplace benefits - this would amount to around 7.8m employees.
However, this was a six percentage point improvement on figures from last year, which means that approximately one million more employees now have access to workplace benefits.
In January 2013 the insurer found that almost a third of workers had no access to benefits - an estimated nine million people.
The insurer highlighted that problems were still present. It noted that employees suffering from stress received little help from their organisation in 2013.
Despite almost half of respondents (49%) struggling with stress, less than half (42%) of sufferers received help from their employer, while 13% who approached their employer with stress-related problems were not offered any help.
Only a small proportion of employees were offered support to deal with stress, with a fifth (21%) of workers being offered access to third-party services such as employee assistance programmes and 8% being given time off work.
Furthermore, almost a third (31%) were too embarrassed to approach their employer with the issue, while 26% thought telling their employer about their problems with stress could result in them losing their job.
A significant amount of workers left their income exposed should they experience illness or injury that prevented them from working, as only 7% received some form of income protection insurance. An even smaller proportion (3%) received a critical illness policy.
Canada Life marketing director Paul Avis urged employers to review their benefits packages "regularly".
"The fact that a quarter of UK staff do not receive any benefits at all suggests that many workers' health and wellbeing is simply not being prioritised by their employer," he said.
"Workplace benefits are not only a vital part of staff recruitment and retention, but help staff to feel valued in the short-term and can avoid potential disaster if an employee falls ill or receives an injury and is unable to work. Employers should therefore evaluate their benefits packages regularly to ensure they are doing all they can for their staff to maintain a happy and productive workforce."
