Letting Agents and AML: The £10,000 Rent Threshold and HMRC Rules

Most people think of letting agents as a high street business renting flats to students and families. The AML rules mostly do not apply to that kind of letting. They apply when the rent is high. Since the Money Laundering Regulations extended to letting agency work, HMRC supervises letting agent businesses that arrange tenancies at the top end of the market, and its July 2026 guidance spells out what they must do. This guide explains when letting becomes a regulated activity, who counts as the customer, when checks must be done and what HMRC thinks the main risks are. It is written for agents, landlords, property managers and the accountants who advise them. HMRC's pages are updated regularly, so check the current version.

When is letting regulated?

HMRC's guidance for letting agent businesses, published on 8 July 2026, defines a letting agent business as a firm or sole practitioner that carries out letting agency work in response to instructions from a prospective landlord seeking a tenant or a prospective tenant seeking a property. Instructions from either side are enough, and third parties acting for either party, such as joint agents and relocation agents, are included. The key test is the rent:

• The agreement must be for a term of one month or more.
• The rent must be £10,000 or more per month, or the equivalent in any currency, for at least part of the term.

The test looks at the monthly rent, not the total value of the deal, and it applies to each rental agreement. A house share with a single agreement and a total rent over the threshold is in scope, while separate agreements are assessed individually. If a rent is just below the threshold but likely to go above it during the agreement, HMRC says customer due diligence is needed at the start. Turnover rents are in scope if the base rent, the turnover top-up or the total exceeds the threshold. A trade summary of the 2026 update notes that the threshold is the sterling replacement for a euro figure in the regulations.

Examples HMRC treats as in scope

• High street, online, residential and commercial letting agents, land agents and relocation and property sourcing agents.
• Commercial landlords that rent property by way of business, and property developers renting above the threshold.
• Holiday lets and short-term rentals, if the term is a month or more and the rent is above the threshold.
• Sub-lets and guaranteed rent schemes that meet the same criteria.

Examples HMRC treats as out of scope

• Rentals shorter than one month, or under the threshold.
• Property management without letting agency activity.
• Private landlords marketing their own property without an agent.
• Advertising, passing on contact details or enabling direct communication between landlord and tenant, provided the business does not also carry out letting agency activity.
• Holding a pooled client account does not by itself bring a business into scope.

Registration

A business must not trade as a letting agent business until it has applied to register with HMRC. Beneficial owners, officers and managers are subject to HMRC's approval checks, but the business may trade once it has applied and those named on the application can act while the checks are pending. Our guide to estate agents and AML covers the parallel regime for sales.

Who is the customer and when are checks due?

HMRC's guidance says customer due diligence is needed before establishing a business relationship and before an occasional transaction, and that all parties to the rental must be verified. Customers include landlords, tenants, special purpose vehicles, agents, sub-agents, managing agents, trustees and guarantors. The timing rules are specific:

• Landlords: identity verification must be completed before any terms of engagement or contract, and before the property is advertised.
• Tenants: the business relationship starts when the landlord accepts the tenant's offer, and identity verification on the tenant, guarantor or trustee must be completed before any agreement.
• Guarantors: a business relationship is established before any funds are called upon.
• Deposits: no deposit may be taken to secure a property, and no contract may proceed, until customer due diligence is satisfactorily completed.
• Renewals: updated due diligence is required when a residential tenant renews through the agent.

If due diligence cannot be completed, the agent must not transact through a bank account with the customer, must not otherwise establish a relationship, must terminate any existing relationship and must consider a suspicious activity report. Right to Rent checks in England are separate and do not replace money laundering due diligence. Our guide to digital identity verification explains how certified digital services fit in, which HMRC's risk assessment also encourages, noting that using a third party does not transfer responsibility.

Source of funds

Because tenancies last, ongoing monitoring may require the agent to check source of funds and source of wealth. These checks are mandatory as part of enhanced due diligence for politically exposed persons and customers from countries on the FATF call for action list, and HMRC says they are required for any customer making a payment, including guarantors and third parties paying rent. Points to consider include changes in the source of rent, cash payments, deposits paid by someone else, advance rent and last-minute changes to payment accounts. Document the reasoning and the decision, not just the documents. See our guide to source of funds and source of wealth checks.

HMRC's view of the risk

HMRC's sector risk assessment for letting agents, first published on 8 July 2026, draws on the 2025 National Risk Assessment. It describes the property sector overall as higher risk of money laundering but gives letting agent businesses a low residual money laundering risk, reduced from earlier assessments, while stressing that inherent vulnerabilities remain. Terrorist financing risk is low. The main risks it lists are tenants paying rent with illicit funds, a landlord and tenant belonging to the same criminal group, refunds of upfront payments, higher-end exposure to wealthy clients and politically exposed persons, and the fast movement of client money such as deposits, fees and rent.

The typologies include letting out property bought with criminal proceeds, using property as a home or business base for criminals, layering funds through corporate structures, short-term lets with fake or multiple tenants, cannabis cultivation in residential or commercial premises, organised immigration crime and the use of commercial premises for dual-use goods manufacturing.

Red flags

• Secrecy or evasion about the rental, reluctance to provide due diligence, unclear source of funds or rent beyond the tenant's known means.
• Cash or foreign currency, overseas or unfamiliar bank accounts, third-party payments, or overpayments followed by refund requests.
• Rent far from market value, no commercial purpose, unusual speed or late changes in the parties.
• Complex or opaque ownership, trusts or corporate vehicles linked to high-risk jurisdictions. If the beneficial owner cannot be identified, HMRC says the transaction should not proceed.
• Professional enablers who appear negligent or take shortcuts.

Frequently asked questions

Does a letting agent renting a flat for £1,500 a month need to register?

No. HMRC's guidance applies to rents of £10,000 or more per month for a term of at least a month.

Is a private landlord covered?

Not if they market their own property without an agent.

Can an agent take a holding deposit before checks are finished?

HMRC says no deposit may be taken to secure a property until customer due diligence is satisfactorily completed.

Where can I get AML training?

See Learnsignal's CPD courses for finance professionals.