Most advice on this stops at "contact your bank and seek legal advice". That is true and nearly useless when payroll is in four days.
This is the operational version: what to send, in what order, and which deadlines belong to you rather than to the bank.
One thing to accept before starting. If the freeze follows a suspicion report, nothing you do speeds up the National Crime Agency. What you can control is that the bank has everything it needs the moment it is free to act, and that your business survives the interval.
Day one
Establish which mechanism you are in. Ask the bank one direct question: is this a fraud check on a specific transaction, a compliance review, or a court order? They can usually answer that much even when they cannot say more.
| The answer | What it means |
|---|---|
| A specific transaction is being checked | Fraud check. Days, resolvable with documents |
| "A compliance review", no detail, no timeline | Likely a suspicion report. The bank cannot elaborate |
| You have received a court document | Account Freezing Order. Instruct a solicitor today |
Ask for hardship access in the same call. Wages, rent, tax payments. Ask explicitly, name the amounts, and follow up in writing. Banks can permit limited access and generally only do so when asked.
Do not move anything. Not the residual balance, not incoming payments redirected to a personal account, not invoices reissued to a sister company. Every one of those converts a compliance question into a much more serious one.
- Day 1Identify which mechanism you are in. Request hardship access in writing. Move nothing.
- Days 2 to 5Assemble the complete evidence pack and send it in one go. Drip-feeding restarts the review.
- Week 2Written follow-up. Ask for acknowledgement that the pack was received. Open a formal complaint.
- Weeks 3 to 8Continuity: payroll, suppliers, VAT. If necessary open a declared account at a second institution.
- After the final responseSix months to take the complaint to the Financial Ombudsman Service.
Days two to five: the evidence pack
This is the only lever you genuinely control, and most people waste it by drip-feeding.
Send one complete pack, once. Each partial answer restarts an internal review cycle. A single well-organised submission is reviewed once.
What goes in it
| Element | Why it matters |
|---|---|
| A source of funds narrative | One page, plain language: where the money came from, why it arrived when it did |
| Contracts or purchase orders | The commercial reason the payment exists |
| Invoices matching the amounts | The link between the narrative and the transaction |
| Remittance advice or payment references | Ties the incoming payment to the invoice |
| Prior bank statements | Establishes the pattern, or explains why this one breaks it |
| Counterparty identity | Who paid you, what they do, how long you have dealt with them |
| Corporate documents | Certificate of incorporation, current registry extract, ownership structure |
| An explanation of any change | New market, new product, new client size, change of directors |
How to write the narrative
Three paragraphs, no more.
What the business does, in one sentence a non-specialist understands. Not your marketing positioning. What you sell and to whom.
Why this money moved, specifically. "Invoice 2026-114 for a software licence renewal, issued 3 July, paid 22 July by our client X, a distributor we have invoiced quarterly since 2023."
Why the pattern looks different, if it does. Volume changes, seasonality, a new contract, a one-off. Say it plainly rather than leaving the reviewer to infer it.
Attach the documents in the order the narrative refers to them, numbered.
What weakens a pack
- Documents that do not reconcile to the amounts, even by small differences
- Contracts dated after the payment
- A narrative that contradicts what the bank already holds on file
- Missing counterparties: an unexplained intermediary between the contract and the payment
- Anything reconstructed after the fact and looking like it
If a document does not exist, say it does not exist and explain why. That is far better than producing something that does not survive scrutiny.
Week two: escalation, properly
Confirm receipt in writing. Not that the bank is "reviewing", but that the pack has reached the team handling the case and that nothing further is needed. This is the moment to surface any gap.
Open a formal complaint. Not because the complaint will unfreeze the account, but because it starts a clock that belongs to you.
That distinction matters:
| Clock | Belongs to | Length |
|---|---|---|
| NCA notice period, then moratorium | The authorities | 7 working days, then up to 217 days |
| Bank's final response to a complaint | You | 8 weeks, or 15 days for payment services |
| Referral to the Financial Ombudsman | You | 6 months from the final response |
The 15 day rule almost nobody mentions
For most complaints, a financial business has eight weeks to send a final response.
But for complaints about payment services, such as bank transfers and electronic money transfers, the deadline is 15 days.
If your complaint is framed as being about a payment that was not executed rather than about the relationship in general, the shorter deadline can apply. That is a material difference and worth getting right when you write the complaint.
Weeks three to eight: keep the business alive
The freeze may resolve in seven working days. Plan as if it will not.
Payroll first. It is the payment with the least tolerance and the most legal consequence. Hardship access, a director's loan, or a second banking relationship, in that order of preference.
Talk to suppliers before you miss a payment, not after. A supplier told in advance about a banking issue generally waits. A supplier who discovers a failed direct debit generally does not.
Tax deadlines do not move because your account is frozen. File on time even if you cannot pay, and tell the tax authority you cannot pay. Late filing and late payment are separate penalties, and you can avoid one of them.
Open a second banking relationship, transparently. Disclose the situation when you apply. Concealing it produces exactly the pattern that caused the first problem. Many institutions will still onboard a business that explains a live compliance review openly.
After the final response
If the bank's final response does not resolve it, and you are eligible, the Financial Ombudsman Service is the next step in the UK.
Are you eligible
| Category | Threshold |
|---|---|
| Micro-enterprise | Fewer than 10 employees and turnover or balance sheet not above €2 million |
| Small business | Turnover below £6.5 million and balance sheet below £5 million, or fewer than 50 employees |
| Private individuals, some charities and trusts | Also eligible |
The test is applied at the date you complain to the bank, not at the date of the events. Check this before spending weeks on the route: a business above the thresholds has no access and should be directing that time at litigation advice instead.
Six months from the final response letter to refer the complaint. Miss it and the route closes.
The ombudsman will not unfreeze an account quickly. It addresses whether the bank treated you fairly, which is a different question and a slower one.
| Ombudsman | What that means | |
|---|---|---|
| Micro-enterprise: under 10 staff and under €2m | Eligible | 8 weeks for a final response, or 15 days for payment services, then 6 months to refer |
| Small business: turnover under £6.5m and balance sheet under £5m, or under 50 staff | Eligible | Same route and same deadlines |
| Above those thresholds | No access | Banking litigation advice is the remaining route |
| A court order: Account Freezing Order | Neither complaint nor Ombudsman | Only a magistrates' court can lift it |
When it is a court order
Different situation, different response.
An Account Freezing Order comes from a magistrates' court and only a magistrates' court can vary or discharge it. There is no complaint route, no ombudsman, and nothing the bank can do.
The response is legal representation and an application to the court. Do not spend the first fortnight writing to the bank.
After it is resolved
Two things worth doing while it is fresh.
Update the bank's profile properly. Business activity, expected volumes, main counterparties, markets. The freeze happened because reality and the file diverged. Close that gap.
Keep the evidence pack. Structure your records so the same pack could be produced in a day rather than a week. If it happens again, and for cross-border businesses it may, the speed of your response is the whole game.
The summary
| You want to | Answer |
|---|---|
| Identify the mechanism | ✅ Ask directly: transaction check, compliance review, or court order |
| Keep paying wages | ✅ Request hardship access explicitly, in writing |
| Speed up the review | ✅ One complete evidence pack, sent once |
| Speed up the NCA | ❌ Not possible |
| Start a clock you control | ✅ Formal complaint: 8 weeks, or 15 days for payment services |
| Escalate beyond the bank | ✅ Financial Ombudsman, if you meet the size thresholds |
| Challenge a court order | ✅ Solicitor and the magistrates' court, nothing else |
| Move the money | ❌ Never |
Frequently asked questions
How do I unfreeze my business bank account?
Establish which mechanism applies, request hardship access for essential payments, then send one complete evidence pack covering source of funds with matching documents. If the freeze follows a suspicion report, the statutory timeline runs regardless, so the goal is to have the bank ready to act the moment it can.
How long does it take?
A fraud check is usually days. A money laundering report gives the National Crime Agency seven working days to respond, then a 31 calendar day moratorium if consent is refused, extendable to a maximum of 217 days. An Account Freezing Order can last up to two years.
What documents should I send the bank?
A one page source of funds narrative, plus contracts or purchase orders, matching invoices, remittance advice, prior statements, counterparty details, corporate documents, and an explanation of any change in your business. Send them together, numbered, once.
Can I get access to pay my staff?
Ask explicitly for hardship access, name the amounts, and confirm in writing. Banks can permit limited access for wages and essential payments, but usually only when asked.
How long does a bank have to respond to my complaint?
Eight weeks for most complaints. Fifteen days for complaints about payment services such as bank transfers and electronic money transfers.
Can I go to the Financial Ombudsman?
If you are eligible. A micro-enterprise has fewer than 10 employees and turnover or a balance sheet not above €2 million. A small business has turnover below £6.5 million and a balance sheet below £5 million, or fewer than 50 employees. The test applies at the date you complained to the bank.
How long do I have to refer a complaint to the ombudsman?
Six months from the date of the bank's final response letter.
Will the ombudsman unfreeze my account?
Not quickly. It decides whether the bank treated you fairly, which is a different question from whether the freeze was lawful, and it takes months.
Can I open another account while this is happening?
Yes, and you should disclose the situation when you apply. Concealing it recreates the pattern that caused the problem. Many institutions will still onboard a business that is open about a live review.
What if the freeze came from a court order?
There is no complaint or ombudsman route. Only a magistrates' court can vary or discharge an Account Freezing Order, so instruct a solicitor rather than writing to the bank.
Sources
- Financial Ombudsman Service: who we can help, small businesses
- Financial Ombudsman Service: time limits
- National Crime Agency: UKFIU guidance on DAMLs and DATFs
Complaint deadlines, the eligibility thresholds for micro-enterprises and small businesses, and the six month referral window reflect Financial Ombudsman Service rules published as of August 2026 and apply to the United Kingdom only. Statutory freeze timelines are set by the Proceeds of Crime Act 2002. This is informational and not legal advice; where amounts are material, instruct a solicitor.