Business banking complaints: build the evidence before escalating

A strong banking complaint explains what happened, what the business lost or could not do, what outcome is requested and which evidence supports the account. Keep the complaint factual enough that another person can understand the problem without reconstructing weeks of phone calls.

Create a chronological record before memories and screenshots disappear

Write the timeline from the first problem. Include dates, account or payment references, who the business spoke to, what the bank said and what happened next. Save statements, screenshots, emails, payment confirmations and support messages. Record the names or reference numbers of telephone cases where available.

Separate fact from interpretation. "Payment of £38,400 was held from 4 June to 8 June" is more useful than "the bank was terrible". Then explain the operational effect: supplier shipment delayed, payroll buffer reduced, card settlement unavailable or account access blocked.

Give the financial business a clear opportunity to put the problem right

The Financial Ombudsman says the customer should complain to the financial business first. State that the message is a formal complaint, explain what happened and say what outcome would resolve it. That could include correcting an error, refunding a fee, explaining an account closure, restoring access or compensating a documented financial loss where appropriate.

Keep the requested remedy proportionate and evidence-based. If a blocked payment caused £1,250 of documented supplier penalties, attach the invoice or contract evidence. If the business wants an explanation rather than compensation, say so. A precise request makes it easier for the complaint handler to understand what remains unresolved.

Know when the financial business should send a final response

The Financial Ombudsman states that financial businesses generally have 15 days to consider complaints about fraud and scams, payment services such as bank transfers or Direct Debits, and electronic money. For most other complaints, the business has up to eight weeks to provide its final response.

Do not confuse an acknowledgement email with a final response. The final response should set out the result of the investigation and explain escalation rights. If the relevant response period passes without a final response, the complainant may be able to refer the matter to the Ombudsman without waiting indefinitely.

Check whether the business falls within Financial Ombudsman small-business eligibility

For events after 1 April 2019, the Financial Ombudsman says it can generally consider a small business where annual turnover is below £6.5 million and the business either has a balance-sheet total below £5 million or employs fewer than 50 people. Micro-enterprises have a separate definition based on employee count and euro-denominated turnover or balance sheet limits.

Eligibility calculations can be more complex where companies are connected or a business temporarily exceeds a threshold. The Ombudsman also covers some charities, trusts and individuals who gave personal guarantees for certain business borrowing. Use its current eligibility checker or contact the service if the position is unclear.

Document financial loss separately from inconvenience and business disruption

Build a schedule of direct losses: extra bank charges, late-payment penalties, emergency borrowing, FX movement, duplicated payment, lost interest or professional fees caused by the specific issue. Attach the document that supports each amount. Do not inflate the claim with rough estimates if stronger evidence is available.

Then describe operational disruption separately. A frozen account may have consumed ten staff hours, delayed a payroll file or forced a director to contact suppliers. Even where not every hour becomes a monetary claim, the chronology helps show why the matter was serious and what the bank knew while the problem continued.

Escalate with the final response, timeline and evidence in one file

If the business remains unhappy, the Financial Ombudsman says it should normally be contacted within six months of the financial business's final response, subject to exceptions in the rules. Submit the complaint summary, final response, key documents and the remedy sought. Avoid sending hundreds of unsorted pages without a guide to what they prove.

The Ombudsman will consider both sides and decide what is fair and reasonable in the circumstances. Keep expectations grounded in the evidence. A strong escalation shows the original error, the bank's opportunity to correct it, the continuing loss or unfairness, and the exact point that remains unresolved.