Tenant Security Deposits: What UK Landlords Need to Know About the Law and Accounting

If you let residential property in the UK, the rules around tenant security deposits are not merely good practice – they are legal requirements with significant consequences for non-compliance. This guide explains the UK’s deposit protection rules, the deposit cap that applies in England, and how to account for deposits correctly in your landlord records.

The UK Tenancy Deposit Protection Scheme

Since April 2007, landlords in England and Wales must protect a tenant’s deposit under one of three government-approved Tenancy Deposit Protection (TDP) schemes for all assured shorthold tenancies:

• Deposit Protection Service (DPS)
• MyDeposits
• Tenancy Deposit Scheme (TDS)

The deposit must be registered with a scheme within 30 days of receiving it. You must also provide the tenant with ‘prescribed information’ about where the deposit is held, which scheme is used, and what their rights are. Failure to protect the deposit or provide prescribed information within the required timeframe can result in a court ordering you to return the deposit and pay the tenant a penalty of between one and three times the deposit amount.

Equivalent legislation applies in Scotland and Northern Ireland, with separate schemes in those jurisdictions. If you let property in Scotland, the deposit must be registered with SafeDeposits Scotland, Letting Protection Service Scotland, or my|deposits Scotland.

The Deposit Cap in England

Under the Tenant Fees Act 2019, which applies in England, landlords are limited in how much they can take as a security deposit:

• Where annual rent is less than £50,000: the maximum deposit is five weeks’ rent
• Where annual rent is £50,000 or more: the maximum deposit is six weeks’ rent
• Holding deposit (to reserve a property): capped at one week’s rent

Taking more than the permitted amount is unlawful and the excess must be repaid. The holding deposit must be returned within 15 days of a tenancy agreement being signed, or retained for a legitimate reason (such as the tenant withdrawing, failing a right-to-rent check, or providing false information).

How to Account for Security Deposits

For the vast majority of individual landlords and small property companies (who prepare accounts under FRS 102 or the micro-entity regime), the accounting treatment of a security deposit is straightforward.

On receipt of the deposit

The deposit is not rental income. You have received the money, but you hold it on trust for the tenant – you have an obligation to return it at the end of the tenancy (subject to any legitimate deductions). The deposit should be recorded as a liability: money received that is owed back.

At the end of the tenancy – deposit returned in full

The liability is cleared. No income is recognised. The deposit passes from the protected account back to the tenant.

At the end of the tenancy – deposit retained (in whole or in part)

If you retain any portion of the deposit to cover unpaid rent or property damage, the retained amount is recognised as income in the tax year in which you retain it. This is taxable rental income and must be included in your Self Assessment return for that year.

Practical Record-Keeping

From a practical record-keeping perspective:

• Keep the deposit in a protected scheme account – it should not sit in your main bank account or be used to fund other expenses
• Record the deposit separately in your accounts as a liability, not as rental income
• At the end of a tenancy, document any deductions in detail with photos, inventory check-out reports, and repair invoices
• Record the return of the deposit as a settlement of the liability
• If you retain any portion, record that amount as rental income in the relevant tax year

The Return Deadline

In England, once the tenancy has ended and both landlord and tenant have agreed on the final amount to be returned (or where disputes have been resolved through the scheme’s dispute resolution process), the undisputed amount must be returned within 10 days.

If there is a dispute over deductions, the tenant can raise this through the TDP scheme’s free dispute resolution service. During a dispute, the landlord is not required to return the disputed portion until the dispute is resolved. The undisputed portion should still be returned within 10 days.

What Happens if You Fail to Protect the Deposit?

If you fail to protect the deposit within 30 days or fail to provide the required prescribed information, the tenant has up to six years to take court action. The court can order you to:

• Return the deposit immediately
• Pay the tenant a penalty of between one and three times the deposit amount

In addition, while the deposit is unprotected, you cannot serve a valid Section 21 notice to end the tenancy. Protecting deposits correctly is therefore important not only to avoid penalties but also to preserve your rights as a landlord.

Get Expert Help With Tenant Deposit Accounting and Compliance

Tenant security deposits must be handled carefully to ensure they are recorded and managed in line with accounting standards and tenancy regulations. At Cigma Accounting, we support landlords and property businesses in Kingston Upon Thames, with nearby operations across Tolworth and Hooks, helping them correctly account for deposits so they remain compliant and avoid issues with reporting or tenant disputes.

Mistakes in how deposits are treated can distort financial records and create complications when preparing year-end accounts or responding to regulatory checks. With support from Cigma Accounting, and with physical offices across London, landlords can maintain clearer financial reporting and ensure their property accounting processes remain accurate, consistent, and compliant over time.