Fewer parents 'net retirement cash'
While 67% of UK adults without children have money squirrelled away for later life, this figure falls to 56% of those with children, the report - titled The Future Of Retirement: Why Family Matters - found.
The study took into account the attitudes of 17,000 people in 17 countries around the world.
The UK ranked joint bottom with the US in terms of those who want to live with their children later in life.
Researchers also found that 65% of UK parents have never made a will and 48% of couples with children have no life insurance.
Christine Foyster, head of wealth development at HSBC, said: "The fact that such large numbers of households are not planning ahead is leaving families greatly exposed to unforeseen events."
The report found that retirement planning among UK couples is most likely to be fully undertaken by men.
It said more than a third (37%) of men claim to exercise sole household responsibility for managing retirement savings, compared with a quarter of women.
Women were found to be more likely to focus on shorter-term finance, with 43% of women who are married or living with a partner taking sole responsibility for managing the household budget, compared with 32% of men.
© 2011 Press Association