Women who are in their 50s and have a full-time job earn nearly 20 percent less than men of the same age.
The Trades Union Congress analysis, which is based on figures from the Office for National Statistics, showed that women earned up to 11.99 pounds an hour, and men of the same age are paid an average of 14.69 pounds.
According to the Daily Mail, the analysis found that in their 20s, women typically earn more than men and in their 30s they fall only slightly behind, but the gap grows rapidly in their 40s and reaches a peak in their 50s.
Frances O'Grady, general secretary of the TUC, said that 'low pay remains a big problem for women. This is particularly the case for the millions of women who have been badly let down by the pension system and who are approaching retirement with little or no savings, the report said.
He said that 'part-time work is the only option available for many older women who also have to look after loved ones, either their grandchildren or their own parents, who may no longer be able to work long hours.
He added that 'most of these women earn less than 10,000 pounds a year, barely enough to live on, let alone save for their retirement.'
The average woman of any age who works part time earns 8,666 pounds a year, according to the ONS.
The report also showed that the number of older women in work has increased sharply over the past 20 years.
In 1992, 47 percent of women between 50 and 64 had a job, compared with 61 percent who have a job today, it added. (ANI)