This pledge extends the society's existing 'branch promise' by a minimum of two years, contrasting with the ongoing trend of bank branch closures across the UK.
Nationwide highlighted that branches are crucial for vulnerable and older customers, but also for younger people, with over one in ten new student accounts opened in branches.
The society noted a particular increase in account openings in locations where its branch is the 'last in town', with 33 more becoming such since January.
Beyond banking services, Nationwide branches also host community initiatives such as dementia clinics, digital lessons, and provide 'safe spaces' for victims of domestic abuse.