Those who received parental support got an average of £11,241 to help meet housing costs and other financial pressures.
Research from savings app Spring found that a quarter of recipients cited housing affordability challenges as a key reason for receiving financial help from their parents.
Meanwhile, 6% of UK adults have received, or expect to receive, support with a first-home deposit.
The same proportion have received help with rent or mortgage payments, and 6% have been assisted with clearing debt before applying for a mortgage.
The findings highlighted the increasingly important role family wealth is playing in improving access to the property ladder.
While only 15% of UK adults receive financial support from their parents, those who do are often receiving substantial sums. One in four recipients received £10,000 or more.
Around 16% received between £10,000 and £24,999, while almost one in 10 received between £30,000 and £50,000. A further 0.3% received more than £50,000 from their parents.
Derek Sprawling, head of money at Spring, said: “Many people associate the Bank of Mum and Dad with helping younger family members onto the property ladder, but these findings show the scale of support being provided can be significant.
“For those fortunate enough to receive financial help, it can accelerate progress towards major life goals such as buying a home or building financial stability. However, not everyone has access to that support, making personal savings more important than ever.”
