Three quarters (73 per cent) of adults would they consider becoming a customer of a bank or building society that provided financial advice services, a poll has revealed.
More than one in five are saving or investing less because they cannot access financial advice, research for the Nottingham Building Society has found.
The lender's study found 21 per cent of adults believed they were not saving as much as they could and would be able to put away an extra £134 a month on average if they were able to get financial advice.
Around a fifth believed they would be able to save or invest £200 or more extra each month if they were to receive financial advice.
The research was conducted online in October 2017 among a nationally representative sample of 1,079 adults aged 18 plus.
David Marlow, chief executive of The Nottingham, said: "It is worrying that people are saving or investing less than they could afford simply because they cannot access advice on their finances.
"The increasing competition among providers means there is more choice for savers and investors but at the same time people clearly need more support on deciding what is right for them and their individual circumstances.
"Banks and building societies can play a role in making face-to-face advice more accessible but branch closures are making it harder for customers to get the advice they need.
"The Nottingham is committed to playing its part by expanding its branch network and offering more services."
Younger savers and investors claimed to need support with their finances the most, with nearly one in three of under-35s believing they were not saving enough because of a lack of advice compared with just 12 per cent of the over-55s questioned.
Around 20 per said they had struggled to access advice on savings in the past two years and 11 per cent had struggled to get advice on investments.