Principality Building Society has promised to keep all of its branches open until at least the end of 2025.
The building society has 53 branches and 14 agencies across Welsh high streets and the border.
More than 83% of the lender's members surveyed believe that branches enable financial providers to be part of their communities, while more than 70% said a branch presence was a key factor when deciding which financial provider to choose.
Julie-Ann Haines, chief executive at Principality Building Society, said: “Healthy high streets are more than just a place where people do their banking and shopping.
“People use branch visits as an opportunity to enjoy some social interaction and our col-leagues see members as individuals, not just customers.
“Today we are making a promise to maintain our branch presence in all of the towns and cities we currently operate in Wales and England until 2025 at least, giving our members, col-leagues and communities confidence.
“Feedback from members continues to reinforce that having access to cash and services is vi-tally important to them, and we see our presence on high streets as a key part of what we offer as a member-owned building society.
“We plan to continue our investment in branches into 2022 and beyond, with further refurbishments planned to meet the needs of our members. We have planned as far ahead as we possibly can with our commitment as we know consumer behaviour is changing but we need to continue to offer a balance between online banking and face to face service.
“It has been a very difficult period for the high street but as competitors continue to close their branches, I am proud that we have the largest physical branch presence of any financial brand in Wales.
“As a major business in Wales, we want our towns to thrive. Financial service organisations have a role to play in ensuring towns and communities prosper.
“We will continue to keep our branches open so long as members continue to value and use them so we can be there for our future generations.”