The figures, published today, show new cases received in the last six months with Lloyds Banking Group leading the way followed by Barclays and Royal Bank of Scotland.
Lloyds received 20,190 complaints across all its brands while Barclays received 10,892 and RBS received 7098 complaints. Seven hundred new Barclays Bank complaints related to investments, the highest number of investment complaints received by any institution.
Last April, Money Marketing revealed adviser concerns about Barclays advisers putting large amounts of client savings into a single fund.
The figures show a large increase compared to the previous six months where the Lloyds group received 15,233, Barclays received 8,802 and RBS received 5,883.
The publication of the new figures has renewed criticism of the methodology behind the data with the ABI calling on the data to take account of the amount of business transacted.
Abbey received 4918 complaints in the last six months, HSBC received 3881, Citibank received 1844 while credit card provider MBNA received 2185 and Capital One received 1609. Building society Nationwide received 1349 complaints.
Sesame, St James’s Place and Openwork are the only distributors on the complaints list. Sesame received 98 complaints, Openwork 43 and SJP 45.
Aviva’s brands received 1411 complaints while Axa received 847 and Legal & General received 736.
The FOS has also published data on the results of cases resolved by the FOS in the same six month period in terms of individual brands.
Barclays Bank saw 65 per cent of cases resolved in favour of the customer, Lloyds TSB Bank saw 51 per cent in favour of the customer while the figure for Natwest was 48 per cent.
Sesame has 52 per cent of claims resolved in favour of the customer, SJP had 53 per cent and Openwork had 37 per cent.
PPI providers saw much higher percentages of cases resolved in favour of the customer.
Credit card provider MBNA saw 85 per cent of complaints settled in favour of the customer, this rose to 99 per cent for its general insurance complaints.
ABI Director of Consumer Strategy Maggie Craig says: “It is important for consumers to have clear and meaningful information about the performance of companies who manage their insurances and investments, including how they handle complaints.
“The ABI’s own data puts complaints into clearer perspective. For example, the actual number of motor insurance complaints referred to the FOS equated to one complaint per 4,100 motor policies; one complaint per 12,700 travel insurance policies, and one complaint for every 14,700 annuity contracts. Going forward, it is important for the FOS to adopt a similar approach when publishing its complaints data. This approach will help customers to make informed choices about an individual company’s performance, and provide the right incentive for individual firms to improve their performance as necessary.”