Co-op Bank vs Credit Union: What's the Difference?

People often confuse the Co-operative Bank with a credit union, but they are not the same thing. Despite its name, the Co-operative Bank is not itself a co-operative and has not been owned by the Co-operative Group since 2013; it is a conventional company, now wholly owned by Coventry Building Society. Credit unions, by contrast, are genuinely co-operative: each one is owned and controlled by its own members.

If you searched for "Co-op credit union", you may be after one of three things: the Co-operative Bank, a credit union in general, or a workplace credit union open to Co-op Group employees. The first two are covered below; workplace credit unions are a type of credit union, open only to staff of a particular employer. 

The Co-operative Bank

The Co-op Bank is a UK retail bank offering current accounts, savings, mortgages and business banking. Founded in 1872, it is known for its Ethical Policy, first published in 1992 and since shaped by customer ballots. It was owned within the co-operative movement from its founding and by the Co-operative Group until 2013, when a £1.5bn capital shortfall forced a rescue deal that handed control to hedge funds and other investors; the Group had exited entirely by 2017.

On 1 January 2025, Coventry Building Society completed a £780m acquisition of the bank, bringing the bank back into the mutual sector, though the bank itself remains a company, now owned by a mutual rather than being one. 

Credit unions

A credit union is a financial co-operative owned by its members rather than by outside shareholders. Each has its own membership requirement, known as a common bond: you must live or work in a particular area, work for a specific employer, or belong to a particular association. Members' savings fund loans to other members, and any profits are returned to members as dividends.

The Bank of England counted 335 UK credit unions in the UK banking sector in 2025. Deposits with both the Co-operative Bank and any UK-authorised credit union are protected by the Financial Services Compensation Scheme (FSCS) up to £120,000 per person, per institution.

For now the bank and Coventry Building Society hold separate licences, so savings with each are covered separately. From 1 January 2027, when the bank's business is due to transfer into the Society (subject to court approval), the two will share one £120,000 limit. 

Co-op Bank vs credit union: comparison table 

 Both are regulated by the Prudential Regulation Authority (PRA) for prudential matters and the Financial Conduct Authority (FCA) for conduct, and deposits with both are FSCS-protected. 

Why the confusion happens

The confusion comes from the name. 'Co-operative' in the bank's title is a historical brand, not a description of who owns it, whereas a credit union is a co-operative in the literal sense, owned by the people who save with it. 

Should I use the Co-op Bank or a credit union? 

They are not really competitors, because their products differ. Use the Co-op Bank for day-to-day banking: your current account, savings and mortgage.

Credit unions are best for small loans and steady saving. By law, credit unions in Great Britain can't charge more than 3% a month on loans (about 42.6% APR); in Northern Ireland the cap is 1% a month. Many also offer payroll savings, taken straight from your wages. The catch is the common bond: you can only join if you qualify through where you live, work, or an association you belong to. So the real question isn't which is better; it's whether you can join one at all.