Money laundering is a criminal offence in the UK under the Proceeds of Crime Act 2002 (POCA), covering any attempt to conceal, move, use, or possess property obtained through criminal conduct. The three main money laundering offences under UK law carry penalties of up to 14 years in prison and an unlimited fine, and a conviction is almost always followed by a confiscation order that strips the defendant of the financial benefit they gained. You do not need to have committed the underlying crime yourself, and prosecutors do not need to prove exactly which crime generated the money. Knowing or suspecting that property has a criminal origin is enough.
The Three Main Offences Under POCA
POCA creates three separate money laundering offences, each aimed at a different role in the chain.1Legislation.gov.uk. Proceeds of Crime Act 2002
Section 327 covers concealing or transferring criminal property. Moving dirty money into a different account, converting it into another currency, or disguising where it came from all fall within this provision.
Section 328 targets anyone who enters into or helps arrange a deal that lets another person acquire, keep, or use criminal property. You do not need to own the assets. Helping someone else handle them is enough.
Section 329 makes it an offence simply to acquire, use, or possess criminal property.
The net is deliberately wide. A drug dealer hiding cash, an accountant structuring transactions for a client, and someone knowingly buying a stolen watch can all face prosecution under different parts of the same law. The point is to catch everyone from the person who generated the criminal proceeds to the person who eventually spends them.
What Counts as Criminal Property
Section 340(3) defines criminal property as property that a person knows or suspects represents a benefit from criminal conduct.2Legislation.gov.uk. Proceeds of Crime Act 2002 Explanatory Notes Two things matter: the nature of the property and the person’s state of mind.
Almost anything qualifies as property: cash, bank balances, real estate, cars, cryptocurrency, jewellery. The mental threshold is lower than most people assume. Courts have interpreted “suspects” to mean that a person thinks there is a possibility the property is tainted. Certainty is not required, and prosecutors do not need to identify the specific predicate crime. They only need to show the property came from some form of unlawful conduct.
This is where people get tripped up. Assuming you are safe because nobody told you directly where the money came from rarely works as a defence if the surrounding circumstances should have raised red flags.
Prison Sentences and Fines
The three primary offences under sections 327, 328, and 329 each carry a maximum of 14 years’ imprisonment and a fine with no statutory cap.3Sentencing Council. Money Laundering
The Sentencing Council publishes guidelines that judges use to place a particular case within that range. Factors that push sentences higher include large sums of money, sophisticated planning, a professional role that was abused, and links to organised crime. The starting point for the most serious cases sits at around seven to ten years before any aggravating or mitigating factors are applied.
Confiscation Orders
Prison time is only half the picture. Courts routinely use confiscation orders under Part 2 of POCA to strip convicted defendants of their financial gains.4The Crown Prosecution Service. Proceeds of Crime
A confiscation order requires the defendant to pay a sum equal to the benefit they obtained from their criminal conduct. The Crown Court calculates that benefit by looking at the value of property or financial advantage the defendant gained. The order can extend to assets beyond those directly connected to the offence of conviction.
The order must be paid immediately unless the defendant shows a need for time, in which case the court can allow up to three months, extendable to six. If the defendant cannot or does not pay, additional prison time is added on top of the original sentence. A money laundering conviction bites hardest here: you serve the sentence and still owe every penny the court determines you gained.
Reporting Duties and the Offences That Attach to Them
POCA does not rely solely on police work. It conscripts the private sector. Businesses in the regulated sector, including banks, building societies, solicitors, accountants, estate agents, and trust or company service providers, have a legal duty to spot and report suspicious activity.5GOV.UK. Your Responsibilities Under Money Laundering Supervision
Failure to Disclose
Under section 330, a professional in the regulated sector commits a criminal offence if they know or suspect that someone is engaged in money laundering, that knowledge came to them through their work, and they fail to submit a Suspicious Activity Report (SAR) to the National Crime Agency as soon as practicable. The offence carries up to five years’ imprisonment on indictment, or up to six months on summary conviction.6Legislation.gov.uk. Proceeds of Crime Act 2002 – Failure to Disclose: Regulated Sector
Tipping Off
Once a SAR has been filed or an investigation is underway, section 333A makes it a crime for someone in the regulated sector to disclose that fact if the disclosure would prejudice the investigation. A related offence under section 342 covers any disclosure likely to prejudice a money laundering investigation, regardless of whether a SAR was filed.
The rule creates a genuine tension for professionals, especially solicitors. You cannot tell your client that you have reported them. Defences exist for disclosures made within the same firm, between regulated institutions, to a supervisory authority, or by a legal adviser trying to dissuade a client from criminal conduct, but none of those defences apply if the disclosure is intended to further a criminal purpose. On conviction on indictment, tipping off carries up to two years’ imprisonment, or up to three months on summary conviction.
Unexplained Wealth Orders
Even without a criminal conviction, law enforcement has tools to go after suspicious property. Unexplained Wealth Orders (UWOs), introduced by the Criminal Finances Act 2017 and reformed by the Economic Crime (Transparency and Enforcement) Act 2022, allow enforcement agencies to apply to the High Court for an order requiring an individual to explain their interest in property and how they obtained it.7UK Parliament House of Commons Library. Unexplained Wealth Orders
UWOs target two groups: people linked to serious crime, and individuals who hold or have held prominent public functions outside the UK. If the recipient fails to provide a satisfactory explanation, the property is presumed to be recoverable, making it far easier for the authorities to seize it through civil recovery proceedings. The orders were designed for cases where a criminal prosecution may be difficult to mount but the gap between someone’s known income and their visible wealth is glaring.