Nearly two-thirds of men (64%) were confident they will retire at the age they plan, compared to one in two (53%) women, according to new research by Canada Life.
The findings, based on those who had received advice from a professional adviser, were drawn from 4,001 UK adults of which 1,605 had received regulated financial advice, and conducted by Opinium between 6-9 July 2021.
When asked about financial worries, 45% of women said they didn't feel they would have any financial worries in retirement, in comparison to 58% of men.
This inequality can only be addressed through decisive policy action to address the pension gender divide."
Men were also more likely to think they will completely stop working when they retire, compared to 55% of women.
One in two men (52%) are likely to phase into retirement, reducing their working hours over a number of years, compared to 40% of women.
Fewer women (50%) than men (60%) feel likely that they will be able to support family members financially if needed, once they had themselves retired.
Women also felt less confident being able to leave a financial legacy, with 46% of women thinking they will be able to leave the desired amount to loved ones, compared to 54% of men.
Sean Christian, managing director and executive director, Wealth Management Division, Canada Life, said: "A retirement gender divide is clearly revealed in this research, with men showing a greater confidence in almost every aspect of their retirement plans.
This has no doubt been exacerbated by the gender pensions gap, currently estimated to be twice the size of the gender pay gap. This gap in earnings and savings often appears when women take time away from work to bring up a family or decide to return to work part-time.
Women are also more likely to work part-time in the types of low paid work where they miss out on the benefits of being auto enrolled into a pension, simply because they don't meet the criteria."
He added: "This inequality can only be addressed through decisive policy action to address the pension gender divide. Relatively simple changes to the way auto enrolment works today would benefit both men and women but would go a long way towards levelling the playing field.
Changes such as removing the lower contributions limit would let more people benefit from every pound earned, while removing the £10,000 threshold would make auto enrolment more inclusive and begin to level up pensions for all."