Where drug money goes after the deal

Street-level drug transactions still happen in physical currency. That’s where the problem for money launderers starts. 

You see, a million pounds in £20 notes weighs roughly 50 kilograms and fills a medium-sized suitcase. And with the UK drug supply generating billions in cash each year, almost all of it in used notes, the people who generate this money face a logistical problem when it comes to laundering it. 

That cash has to go somewhere. And the somewhere is usually where regulated professionals become involved.

The scale of the problem

The National Crime Agency’s (NCA) National Strategic Assessment of Serious and Organised Crime identifies drug supply as one of the highest harm, highest revenue criminal markets operating in the UK. Cocaine and heroin alone generate billions in retail value annually, with synthetic drugs, cannabis and emerging markets adding to the total.

The cash flows upward through the supply chain until it reaches the people who need to turn it into something usable. The UK’s National Risk Assessment of Money Laundering and Terrorist Financing 2025 (NRA) identifies drug supply as one of the biggest sources of laundered money in the UK.

Where the cash goes

The most common route is cash-intensive businesses. The FATF report on Money Laundering through the Physical Transportation of Cash, and successive NCA strategic assessments, identify the same categories repeatedly: car washes, takeaways, barber shops, nail salons, convenience stores and taxi firms. These businesses exist legitimately in their thousands, which is precisely why they work as fronts.

Money service businesses are another route, particularly smaller bureaux de change and money transfer operators where compliance controls can be weaker. Hawala and other informal value transfer systems also feature, especially where the proceeds need to move internationally.

Money mules sit alongside all of this. The NCA’s work on money muling describes a UK landscape where tens of thousands of bank accounts are recruited each year to move illicit funds, often belonging to students, recent arrivals or people in financial hardship.

By the time the cash has been through one or more of these routes, it looks like business revenue, salary payments or transfers between accounts. The original criminal origin is two or three steps back and increasingly difficult to trace.

Where it ends up

The end point is usually an asset, with property being the most common. Transparency International UK’s reporting on UK property and dirty money has tracked billions of pounds in suspect funds flowing into residential and commercial real estate. 

Cash-purchased property is harder to surveil than mortgage-funded property. Property held through corporate structures, particularly overseas entities, adds further opacity.

Companies are the second major destination. Acquiring or establishing a UK company, particularly one with a plausible trading history, creates a vehicle for further laundering and a façade of legitimate wealth. The NRA 2025 notes the continued role of corporate vehicles in laundering serious organised crime proceeds.

Luxury goods come third, including watches, jewellery, cars and art. The high-value dealer sector handles all of these items and more, which is why it also falls within the UK’s Money Laundering Regulations 2017 (as amended) (MLRs).

How this looks in your business

By the time it reaches a regulated firm, cash from the UK’s drug economy has been through one or more sanitising steps and the client looks almost like any other. But there are some tell-tale signs.

Accountants see it in their client’s numbers:

• A client’s cash-based business shows turnover that doesn’t match comparable businesses.
• Cash sales that are high and stable in a way that doesn’t reconcile with footfall or premises size.
• The client’s lifestyle outpaces declared income.
• Director’s loans appear from sources that don’t quite add up.
• Companies are acquired with no obvious commercial logic.

An accountant has the clearest view of the inconsistency because they’re looking at the numbers in detail and able to spot these patterns.

Estate agents and letting agents see it at the point of purchase:

• The buyer has a source of funds explanation that doesn’t reconcile with their stated wealth or background.
• The transaction is cash-funded or part-funded from accounts that don’t match the buyer’s known income.
• A third party provides funds without clear explanation.
• The buyer is unusually relaxed about price, unusually keen to complete quickly, or unusually uninterested in the property itself.

TCSPs see it in a company’s structure:

• A client wants a corporate vehicle established with no clear commercial rationale.
• The ownership structure is more complex than the apparent business activity requires.
• Nominee arrangements are proposed without obvious legitimate purpose.
• The geographic footprint includes high-risk jurisdictions without commercial justification.

High-value dealers see it through direct contact with their client:

• A buyer offers cash or part-cash on a high-value purchase.
• The buyer is unfamiliar with the product category, suggesting the purchase isn’t about the asset itself.
• Multiple purchases are made in succession that, taken together, look like structuring to stay below thresholds.

Legal professionals see it across multiple touch points:

• Property transactions where the source of funds doesn’t quite reconcile.
• Company acquisitions without obvious commercial rationale.
• Trust structures whose stated purpose doesn’t match the family or business situation.
• Client account flows that involve third parties without clear connection to the matter.

In each case, the professionals involved are being asked to notice that the story doesn’t quite hold together, rather than assuming everything’s above board. 

How to stop the flow of drug money

Your business’ risk-based approach and enhanced due diligence policies, controls and procedures (PCPs) should be telling you when to escalate and what to document, as well as what drug proceeds look like when they arrive on your desk.

This is where good systems and professional judgement need to work together. Your business-wide risk assessment sets the framework for what your firm is looking out for, with your AML PCPs providing the structure your business needs in its day-to-day work. 

Your client risk assessment applies your AML framework to the specific relationship in front of you. And you, reading the file, decide whether the story holds together.

When all of that combines properly, drug proceeds get caught at the point they would otherwise disappear into legitimate wealth, which is what the whole AML regulatory system is designed to do.

AMLCC’s Client Linking feature allows you to connect separate client profiles to a single transaction, giving you a consolidated view of the risk presented by all parties involved and a single report you can produce for your supervisor or for law enforcement if required.