Women are more than twice as likely as men to be earning the minimum wage, according to a study by the Economic and Social Research Institute (ESRI).

The research, funded by the Low Pay Commission, found that just under 5 per cent of the workforce – one in 20 workers – were earning the minimum wage in 2014, then €8.65 an hour but raised since to €9.25.

The percentage was substantially higher for women, however, with 6.9 per cent of female employees earning the lowest legally allowed wage compared with just 2.7 per cent of men.

The gender gap was driven by the fact that female workers were more likely to work in part-time jobs, in smaller firms or in sectors, such as accommodation and food, which typically paid less than other sectors.

Nonetheless, the finding will feed into wider concern about pay differentials between men and women, which have widened in Ireland since 2012.

The ESRI’s study found that the majority of female workers on minimum wage were employed on a part-time basis. It also noted that a high percentage of these women said they had taken up part-time work because it enabled them to look after children or other people.

“ This may be due to constraints facing females, such as the high cost of childcare, which limits their ability to transition from part-time to full-time employment,” the study said.

“Overall, the evidence suggests that factors related to occupational segregation may be as important as family responsibilities in understanding the higher incidence of minimum wage employment among females,” it said.

Foreign workers The think-tank’s analysis revealed that foreign workers here were significantly more likely than their Irish counterparts to be in the lowest-paid jobs.

At 9 per cent, the incidence of minimum wage pay among foreign nationals was more than twice that of Irish employees.

The research also indicated that young people aged 18-29 had the highest exposure to the national minimum wage, at 13.9 per cent.

However, it also noted that the incidence of low pay among younger workers disappeared when tenure, job type, occupation and sector were factored in.

“This suggests that the higher national minimum wage incidence among young people is explained entirely by factors such as lower levels of experience and the type of employment undertaken,” it said.

However, foreign nationals were found to experience a higher incidence of minimum wage relative to Irish employees even after these factors were taken into account.

Contrary to what might be expected, the study also revealed that economically disadvantaged people made up a minority of the total population of minimum wage employees.

In total 28 per cent of employees on the minimum wage in 2014 were from deprived households, with the remaining 72 per cent coming from households that were not classified as being deprived.

Deprived households In comparison, 19.5 per cent of workers earning above the minimum wage were from deprived households. “Therefore, minimum wage increases will also benefit a large number of individuals who are not from economically disadvantaged or deprived households,” the study noted.

Commenting on the report, the ESRI’s Seamus McGuinness said: “The study provides valuable information about factors that increase the probability of earning minimum wage in Ireland.

“It also identifies who would be affected by changes to minimum wage rates and if such changes would be an efficient way to combat poverty,” Prof McGuinness said.