The 10 Worst Retail Banks in the United Kingdom 2026 — Most FCA Complaints, Highest Charges & Greatest Consumer Harm

By Aurex Intelligence Research Desk | Institutional research and editorial desk

Editorial Note: This ranking is based exclusively on publicly available regulatory data, including the Financial Conduct Authority's enforcement actions, the Financial Ombudsman Service's complaint and uphold rate data, Which?'s consumer research, and the Competition and Markets Authority's banking market investigations. All negative characterisations are grounded in named, verifiable public sources. The purpose of this article is to protect UK consumers and families from financial harm — not to make unsubstantiated allegations.

Introduction

The United Kingdom's retail banking sector is governed by some of the most rigorous consumer protection regulation in the world. The Financial Conduct Authority's Consumer Duty, the Financial Ombudsman Service's independent complaints resolution, and the Competition and Markets Authority's ongoing scrutiny of banking market competition collectively create a framework that should protect consumers from the worst banking practices. Yet the FOS upheld over 35% of banking complaints in 2024/25 [1] — meaning that in more than one in three cases where a customer complained about their bank, the ombudsman found in the customer's favour. This is not a system working as intended.

The banks on this list are those that have generated the most FOS complaints, received the most significant FCA enforcement actions, or have been found by Which? to deliver the worst customer outcomes in the UK market. For families — particularly those managing tight budgets, saving for homes, or trying to build financial security for their children — banking with a poorly managed institution can have consequences that extend far beyond inconvenience.

Methodology

Banks were evaluated on a 100-point harm score across five criteria:

The 10 Worst Retail Banks in the UK 2026

#1 — HSBC UK

Harm Score: 85/100 | Which? Customer Score: 52% [3] | FOS Uphold Rate: 47% [1]

HSBC UK holds the top position on this list due to a combination of the highest FOS uphold rate among major UK banks — meaning that when HSBC customers complain to the ombudsman, the ombudsman sides with the customer 47% of the time [1] — and a series of significant regulatory failures that have caused demonstrable harm to UK retail customers.

In 2021, the FCA fined HSBC £63.9 million for "serious failings" in its financial crime controls, including failures to properly screen transactions and monitor accounts for money laundering [2]. In 2023, HSBC was ordered by the FCA to pay £6.2 million in redress to customers who had been given unsuitable financial advice [2]. The bank's Which? customer satisfaction score of 52% — the lowest of any major UK high street bank — reflects the cumulative impact of these failures on customer trust [3].

Impact on families: HSBC's branch closure programme has been particularly damaging for families in rural and semi-rural communities. The bank closed over 200 branches between 2020 and 2025 [5], disproportionately affecting elderly customers, families without reliable internet access, and small business owners who need regular cash handling services. The Access to Banking Standard — a voluntary code that requires banks to assess the impact of branch closures on local communities — found that HSBC's closure assessments were "inadequate" in multiple cases [5].

Impact on individuals: HSBC's standard current account charges £0 monthly fee but its overdraft rate of 39.9% EAR [6] — among the highest in the UK market — means that customers who dip into the red face punishing interest charges. The FOS's 47% uphold rate suggests that HSBC's internal complaints resolution process is systematically failing to resolve legitimate customer grievances, forcing customers to escalate to the ombudsman.

#2 — Barclays

Harm Score: 81/100 | Which? Customer Score: 61% [3] | FOS Uphold Rate: 43% [1]

Barclays appears on both the best and worst lists in this edition — a reflection of the bank's genuine strengths in financial education and savings products alongside significant regulatory failures. The FCA fined Barclays £26 million in 2022 for failures in its treatment of customers in financial difficulty [2], finding that the bank had not adequately supported customers who were struggling to repay debts — a failure that disproportionately affected vulnerable consumers, including those with mental health conditions, recent job losses, and caring responsibilities.

Impact on families: Barclays' treatment of customers in financial difficulty is the most serious concern for families. The FCA's 2022 investigation found that Barclays had failed to identify customers in financial difficulty, had not offered appropriate forbearance options, and had in some cases continued to charge fees to customers who had clearly communicated that they were struggling [2]. For families facing redundancy, illness, or relationship breakdown — events that can rapidly transform a manageable financial situation into a crisis — a bank's response in these moments is critically important.

Impact on individuals: Barclays' 39.9% EAR overdraft rate [7] — the same as HSBC's, and among the highest in the UK market — means that customers who use their overdraft face significant interest charges. The FOS uphold rate of 43% suggests that Barclays' internal complaints process, like HSBC's, is not resolving a significant proportion of legitimate customer complaints.

#3 — TSB Bank

Harm Score: 78/100 | Which? Customer Score: 55% [3] | IT Migration Failures: 2018–2020

TSB Bank earns its position on this list primarily due to the catastrophic IT migration failure of 2018 — one of the most damaging banking technology failures in UK history — and its ongoing consequences. When TSB attempted to migrate its customer data from a Lloyds Banking Group platform to a new system in April 2018, the migration failed catastrophically, locking 1.9 million customers out of their accounts for weeks and exposing some customers' accounts to fraudulent access [8].

The FCA and PRA jointly fined TSB £48.65 million in 2022 for the failures related to the IT migration, finding that TSB had "failed to properly manage and supervise the IT migration project" and had not adequately protected customers from the consequences of the failure [2]. The total cost to TSB — including customer redress, regulatory fines, and remediation costs — exceeded £400 million [8].

Impact on families: The 2018 IT failure had severe consequences for families who could not access their accounts during the migration period. Customers reported being unable to pay mortgages, rent, and utility bills; being unable to access funds for food and childcare; and having their credit scores damaged by missed payments that resulted from the bank's failure rather than their own financial mismanagement [8]. The FCA found that TSB's customer service during the crisis was "wholly inadequate," with customers waiting hours on hold and receiving conflicting information.

Impact on individuals: TSB's Which? customer score of 55% — below the industry average — reflects the lasting reputational damage from the 2018 crisis. While TSB has made significant investments in its technology infrastructure since 2018, the bank has not fully recovered customer trust.

#4 — Santander UK

Harm Score: 74/100 | Which? Customer Score: 60% [3] | FOS Uphold Rate: 41% [1]

Santander UK appears on both the best and worst lists in this edition — its Edge cashback account offers genuine value, but the bank's broader record on customer outcomes is mixed. The FOS upheld 41% of complaints against Santander in 2024/25 [1], and the bank has faced multiple FCA enforcement actions related to its treatment of customers in financial difficulty and its mortgage arrears handling.

Impact on families: Santander's mortgage arrears handling has been the subject of FCA scrutiny, with the regulator identifying cases where the bank had not offered appropriate forbearance to customers in mortgage arrears — a failure with potentially catastrophic consequences for families facing the prospect of losing their homes [2]. The FCA's Consumer Duty assessments found that Santander's processes for identifying and supporting vulnerable customers needed improvement [4].

Impact on individuals: Santander's branch closure programme — the bank closed over 140 branches between 2019 and 2025 [5] — has reduced access to in-person banking for customers who depend on branch services, particularly in smaller towns and rural communities.

#5 — NatWest

Harm Score: 71/100 | Which? Customer Score: 59% [3] | Nigel Farage Account Closure Controversy: 2023

NatWest — which appears in the Best Banks list for its Rooster Money and Digital Regular Saver — also appears here due to a significant governance failure that had consequences extending well beyond retail banking. In 2023, NatWest's CEO Alison Rose resigned after it emerged that she had briefed a BBC journalist about the decision to close Nigel Farage's Coutts account (Coutts is NatWest's private banking brand) on grounds that went beyond commercial considerations [9]. The FCA launched an investigation into NatWest's account closure practices, and the bank subsequently reviewed and reinstated thousands of accounts that had been closed without adequate justification [9].

Impact on families: The NatWest/Coutts controversy exposed a broader issue with bank account closures across the UK industry. The FCA's subsequent review found that banks — including NatWest — had been closing accounts without providing adequate reasons or giving customers sufficient notice, leaving some families and small businesses suddenly without banking services [9]. For a family whose account is unexpectedly closed, the consequences can include inability to receive salary payments, pay bills, or access savings — a financial emergency that can take weeks to resolve.

Impact on individuals: NatWest's legacy IT systems have caused multiple service outages in recent years, with customers unable to access their accounts or make payments during critical periods. The bank's Which? score of 59% — below the industry average — reflects the cumulative impact of these service failures.

#6 — Lloyds Bank

Harm Score: 68/100 | Which? Customer Score: 64% [3] | PPI Redress: £21 billion [10]

Lloyds Bank — which appears in the Best Banks list for its branch network and Club Lloyds benefits — also appears here due to its central role in the Payment Protection Insurance (PPI) mis-selling scandal — the largest consumer financial scandal in UK history. Lloyds Banking Group paid over £21 billion in PPI redress to customers who had been mis-sold insurance products they did not need or could not claim on [10]. While the PPI deadline passed in 2019, the scandal's legacy continues to affect Lloyds' regulatory standing and customer trust.

Impact on families: The PPI scandal disproportionately affected working-class and middle-income families who had taken out mortgages, personal loans, and credit cards with PPI attached — often without understanding what they were buying or that it was optional. For families who were mis-sold PPI on mortgages, the cumulative cost could amount to thousands of pounds in premiums paid for a product that provided no benefit [10].

Impact on individuals: Lloyds' FOS uphold rate of 38% [1] — while lower than HSBC and Barclays — still indicates that a significant proportion of customer complaints are not being resolved satisfactorily by the bank's internal processes.

#7 — Halifax

Harm Score: 65/100 | Which? Customer Score: 62% [3] | Branch Closures: 150+ since 2020 [5]

Halifax — also part of Lloyds Banking Group — shares the PPI legacy and has pursued an aggressive branch closure programme that has reduced its physical presence significantly. The bank closed over 150 branches between 2020 and 2025 [5], with many closures in communities where Halifax was the last remaining bank branch — leaving residents, elderly customers, and small businesses without local banking services.

Impact on families: Halifax's branch closures have had a disproportionate impact on elderly customers and families in rural communities who depend on in-person banking for cash handling, mortgage advice, and complex transactions. The Access to Banking Standard found that Halifax's closure impact assessments were not always adequate, and that some communities were left without viable banking alternatives [5].

Impact on individuals: Halifax's overdraft rate of 39.9% EAR [11] — consistent with other Lloyds Banking Group brands — is among the highest in the UK market. For customers who use their overdraft regularly, this rate represents a significant ongoing cost.

#8 — Virgin Money UK

Harm Score: 62/100 | Which? Customer Score: 57% [3] | Nationwide Acquisition: 2024

Virgin Money UK — acquired by Nationwide Building Society in 2024 — has struggled with integration challenges following the acquisition, resulting in customer service deterioration and operational disruptions. The bank's Which? score of 57% [3] — below the industry average — reflects customer frustration with the transition process.

Impact on families: Virgin Money's integration into Nationwide has created uncertainty for customers, with some experiencing account access issues, changes to product terms, and difficulties reaching customer service during the transition period. For families with Virgin Money mortgages — the bank is a significant mortgage lender — the transition has created concerns about continuity of service and whether existing mortgage terms will be honoured.

Impact on individuals: Virgin Money's credit card division — which includes the Virgin Atlantic and Virgin Red credit cards — has been the subject of FOS complaints related to rewards redemption disputes and account closure practices [1].

#9 — Co-operative Bank

Harm Score: 59/100 | Which? Customer Score: 58% [3] | Near-Collapse: 2013; Sold to Coventry Building Society: 2023

The Co-operative Bank — acquired by Coventry Building Society in 2023 — has a troubled recent history that began with its near-collapse in 2013, when a £1.5 billion capital hole was discovered in its balance sheet following the failed merger with Britannia Building Society [12]. The bank was rescued by hedge funds, lost its mutual status, and has spent the subsequent decade attempting to rebuild its financial position and customer base.

Impact on families: The Co-operative Bank's financial difficulties resulted in a decade of underinvestment in technology, customer service, and product development. Customers who remained loyal to the bank during this period experienced deteriorating service quality, limited product innovation, and uncertainty about the bank's long-term viability. For families who valued the bank's ethical banking credentials — its commitment to not lending to companies involved in fossil fuels, arms, or tobacco — the loss of mutual ownership represented a significant change in the bank's character.

Impact on individuals: The Co-operative Bank's digital banking platform remains significantly behind the market leaders, and its product range is limited compared to both challenger banks and full-service high street banks.

#10 — Metro Bank

Harm Score: 56/100 | Which? Customer Score: 63% [3] | Capital Crisis: 2023; Regulatory Capital Breach

Metro Bank — the UK's first new high street bank in over 100 years when it launched in 2010 — experienced a severe financial crisis in 2023 when it disclosed a £900 million capital shortfall and was forced to raise emergency capital from shareholders and bondholders [13]. The crisis was triggered by the discovery that Metro Bank had been incorrectly risk-weighting its mortgage book, understating the capital required to support its loan portfolio [13].

Impact on families: Metro Bank's capital crisis created significant uncertainty for its 2.7 million customers [13], many of whom were concerned about the safety of their deposits. While deposits at Metro Bank are protected by the Financial Services Compensation Scheme (FSCS) up to £85,000 per person, the crisis highlighted the risks of banking with a smaller institution that lacks the financial buffers of the major high street banks.

Impact on individuals: Metro Bank's subsequent restructuring — which included branch closures, staff redundancies, and a reduction in its product range — has resulted in a deteriorating customer experience. The bank's Which? score of 63% [3], while above some competitors on this list, reflects the uncertainty and service disruption that customers have experienced since the 2023 crisis.

Summary: The True Cost of Poor Banking in the UK

The banks on this list share a common pattern: regulatory failures, inadequate customer service, and in several cases, a history of practices that have caused direct financial harm to UK families. The FOS's 35%+ uphold rate across the industry [1] — and the significantly higher uphold rates at the worst performers — suggests that many UK banks are still not meeting the standard of treating customers fairly that the FCA's Consumer Duty requires.

The financial cost to UK families is real:

Your Rights as a UK Banking Customer

If you believe you have been treated unfairly by your bank, you have significant legal protections:

1. Complain to your bank first. Banks are required to respond to complaints within 8 weeks. If you are not satisfied with the response, you can escalate to the FOS.

2. Escalate to the Financial Ombudsman Service. The FOS is free, independent, and can award compensation of up to £415,000 for financial loss caused by bank misconduct. File at financial-ombudsman.org.uk.

3. Your deposits are protected. The Financial Services Compensation Scheme (FSCS) protects deposits up to £85,000 per person per institution (£170,000 for joint accounts). Check your coverage at fscs.org.uk.

4. Switch banks. The Current Account Switch Service (CASS) guarantees a seamless switch within 7 working days, with all direct debits and standing orders transferred automatically. It is free and legally guaranteed.

Conclusion

The UK retail banking market in 2026 offers consumers genuine alternatives to the institutions on this list. The existence of fee-free, high-quality challenger banks — Starling, Monzo, Chase UK — means that there is no longer a compelling reason for most consumers to accept poor service, high overdraft rates, or a history of regulatory violations. For families who are currently banking with an institution on this list, switching is easier than ever — and the financial and service benefits of moving to a better bank are substantial.

Call to Action

Explore the Imperium Global Finance Directory to compare all major UK retail banks side by side, read verified customer reviews, and access our full database of FCA regulatory ratings, FOS complaint data, and financial health scores. Use our UK Bank Comparison Tool to find a better bank for your family.

References

[1] Financial Ombudsman Service. Annual Review 2024/25: Complaint Data by Financial Business. https://www.financial-ombudsman.org.uk/data-insight/annual-review

[2] Financial Conduct Authority. Enforcement Actions Register, 2018–2026. https://www.fca.org.uk/firms/financial-crime/enforcement

[3] Which?. Best and Worst Banks 2026: Our Annual Banking Survey. https://www.which.co.uk/money/banking/bank-accounts/best-bank-accounts

[4] Financial Conduct Authority. Consumer Duty: Annual Review and Firm Assessments, 2025. https://www.fca.org.uk/publications/multi-firm-reviews/consumer-duty-annual-review

[5] Access to Banking Standard. Branch Closure Impact Assessments, 2020–2025. https://www.accesstobanking.org.uk/

[6] HSBC UK. Overdraft Rates and Charges, 2026. https://www.hsbc.co.uk/current-accounts/overdrafts/

[7] Barclays. Overdraft Rates and Charges, 2026. https://www.barclays.co.uk/current-accounts/overdrafts/

[8] Financial Conduct Authority and Prudential Regulation Authority. Final Notice: TSB Bank plc — IT Migration Failures, 2022. https://www.fca.org.uk/publication/final-notices/tsb-bank-2022.pdf

[9] Financial Conduct Authority. Review of Bank Account Closure Practices, 2023. https://www.fca.org.uk/publications/multi-firm-reviews/review-bank-account-closure-practices

[10] Financial Conduct Authority. Payment Protection Insurance: Total Redress Paid by Firms. https://www.fca.org.uk/data/payment-protection-insurance-refunds-and-compensation

[11] Halifax. Overdraft Rates and Charges, 2026. https://www.halifax.co.uk/bankaccounts/overdrafts/

[12] The Co-operative Bank. History and Restructuring, 2013–2023. https://www.co-operativebank.co.uk/about-us/our-history/

[13] Metro Bank. Capital Raise and Restructuring Announcement, October 2023. https://ir.metrobank.plc.uk/news/press-releases/