The Belief Gap that could break the UK’s Building Societies
The numbers should settle the argument. Building societies and mutual-owned banks now hold 47% of all Cash ISA balances in the UK, totalling more than £205 billion, and they provided 52% of the growth in the UK mortgage market in the six months to March 2025, while supporting 61,400 first-time buyers. They operate 35% of all UK financial high street branches and contribute £7.2 billion annually to the wider economy. And yet most people in this country could not tell you what a mutual is, who owns it, or why that distinction matters.
That is neither a regulatory problem or a product problem. It is a belief problem, and one building societies have brought upon themselves through decades of institutional reticence and a communications posture that mistakes competence for relevance. The sector has earned extraordinary public trust on every metric that counts. Nine in ten building society customers rate their provider as offering good customer service compared to 81% at banks. Fairer Finance data confirms that building societies and challenger banks outperform high street banks on trust. But trust held quietly, never communicated beyond the existing member base, is a diminishing asset.
The structural risk is generational. Building societies command a 32% share of the banking services market but only 24% among those aged 18 to 34. That is not a digital adoption lag; it reflects a communications failure. Meanwhile, 94% of 16 to 34-year-olds have set financial targets and 40% say they feel motivated to save. These are not consumers indifferent to financial institutions. They are consumers who have not been given a compelling reason to choose a mutual.
The Edelman Trust Barometer has consistently placed financial services near the bottom of its global trust rankings. Qualtrics research in 2025 found that 61% of consumers rank trustworthy information as their single highest priority in any financial relationship. Banks have spent years recovering the reputation they lost in 2008. Building societies carry none of that damage, yet have failed to turn that record into a public narrative. That is a strategic error.
The BSA's Building Society Sector Growth Plan, published in November 2025 to mark 250 years of the mutual movement, makes a strong case for capital reform. The FCA and PRA have since announced a Mutual Societies Development Unit, and the government has pledged to double the size of the mutual economy. These are real gains. But policy wins and public belief are different things, and a seat at the table counts for little if the public does not know why it is deserved.
What building societies own that no fintech or high street bank can manufacture is a values proposition structurally baked in rather than reputationally applied. In 2024, building society savers received £2.3 billion more in interest than if they had been with the large banks.
The challenge is not one of substance but of deployment. Building societies must stop treating their public affairs function as reactive, geared only to policy threats, and start treating public belief as a strategic asset requiring active cultivation. The sector's support for first-time buyers is not widely understood by the people who would benefit most from knowing it. The mutual ownership model, which should be among the most compelling stories in UK financial services, is barely known to the under-35 households who will define savings and mortgage markets for the next four decades.
Estimates suggest £1 trillion in assets will transfer to younger generations before the end of 2027. If that wealth moves to institutions whose brand is already established among younger savers, the competitive damage will be structural and hard to reverse. The sector cannot afford to let the largest intergenerational wealth transfer in modern British history pass without asserting its relevance.
Robin Fieth, outgoing chief executive of the BSA, has said that building societies are not asking for special treatment, only recognition. That is a reasonable position in a policy forum. In a public communications context, it is insufficient. Recognition does not come from restraint. It comes from a visible, sustained argument made at scale. It is winning business in a competitive market precisely because it operates differently from the rest. That difference needs to be told, loudly and repeatedly, to audiences who have not yet been given the chance to believe it.
The next 250 years will not be secured by a Growth Plan alone. They will be secured by winning the belief of people choosing their first savings product or opening their first mortgage. Right now, most of those people are making that choice with almost no knowledge of what a mutual is. Changing that is not a regulatory ask. It is the most important piece of work the sector has yet to do.
