Self Assessment for Landlords UK
If you earn money from renting out property in the UK, HM Revenue & Customs (HMRC) will usually expect you to declare that income through Self Assessment. While collecting rent may feel straightforward, the tax side often is not. Many landlords struggle with the finer details, such as what actually counts as taxable rental income, which expenses are genuinely allowable, how mortgage interest relief works under the current rules, and which deadlines can trigger penalties if missed.
This guide to Self Assessment for landlords in the UK is designed to remove that uncertainty. We break down the rules in plain English and explain not just what HMRC expects, but how those rules apply in real-life situations. From understanding furnished versus unfurnished property income, to avoiding common mistakes that lead to unexpected tax bills, everything is covered step by step.
Throughout the post, you will find practical examples, clear explanations of landlord tax changes, and links to official HMRC guidance so you can double-check the rules for your own situation. We also highlight common landlord pitfalls, such as under-declaring income, misunderstanding mortgage interest tax relief, or missing registration and filing deadlines.
Whether you are a first-time landlord or have managed rental property for years, this guide will help you file your Self Assessment return confidently, stay compliant with HMRC, and make sure you are not paying more tax than you need to.
1. Do landlords have to complete a Self Assessment tax return?
In most cases, yes. If you earn money from renting out property in the UK, HMRC will usually expect you to declare that income through a Self Assessment tax return.
The key threshold to be aware of is the £1,000 property allowance. This is a tax-free allowance that applies to gross property income, not profit.
The key “do I need to tell HMRC?” rule
- £1,000 or less in gross property income: You may not need to report it, as it can be covered by the property allowance, provided you are eligible to use it.
- More than £1,000 in gross property income: You will usually need to declare the income through Self Assessment.
HMRC confirms this approach in its official guidance on property income and the property allowance:
How landlords report rental income
Landlords report rental income using the SA105 (UK property) pages, which are submitted alongside the main Self Assessment tax return. This section is specifically designed to capture:
- Rental income received during the tax year
- Allowable property expenses
- Any losses carried forward or used against other property income
HMRC provides a dedicated guide to help landlords complete the property pages correctly: How to fill in the UK property pages (SA105)
Registering for Self Assessment as a landlord
If you are not self-employed but need to declare property income, you normally register for Self Assessment using the SA1 registration route. This is common for employed individuals or retirees who start renting out property.
You can register online via HMRC here: Register for Self Assessment (SA1)
2. Self Assessment deadlines landlords need to know (with real dates)
HMRC is strict when it comes to Self Assessment deadlines, and landlords are no exception. Missing a filing or payment date can trigger automatic penalties and interest, even if you only owe a small amount of tax.
For the 2025/26 tax year, which runs from 6 April 2025 to 5 April 2026, landlords should be aware of the following key Self Assessment dates.
Key Self Assessment deadlines for landlords
5 October 2026
Deadline to register for Self Assessment if this is your first time needing to declare rental income.31 October 2026
Deadline for submitting a paper Self Assessment tax return.31 January 2027
Deadline for submitting your online Self Assessment tax return and for paying any tax owed.
These deadlines are confirmed in HMRC’s official guidance:
What happens if a landlord misses a deadline?
If you miss the 31 January filing or payment deadline, HMRC can apply:
- An automatic £100 late filing penalty
- Daily penalties if the return remains outstanding
- Interest on unpaid tax from the due date
- Additional penalties for prolonged delays
Even if no tax is ultimately due, late filing penalties can still apply. HMRC makes this clear in its penalty guidance: Self Assessment penalties explained
3. What counts as “rental income” for landlords?
When HMRC talks about property income, it means more than just the monthly rent hitting your bank account. Many landlords under-declare income simply because they do not realise certain payments must also be included on their Self Assessment return.
In general, rental income includes all money you receive in connection with letting a property, not just the headline rent.
Income landlords usually need to declare
- Rent payments received from tenants, whether paid weekly, monthly, or in advance.
- Additional charges paid by tenants, such as:
- Cleaning fees
- Gardening or grounds maintenance
- Utility charges you recharge to tenants
- Service or maintenance fees
- Lease-related income or premiums, such as lump sums paid for granting or extending a lease. How these are taxed depends on the length and nature of the lease.
HMRC is clear that if a tenant pays you for a service connected to the property, that payment normally forms part of your taxable rental income.
You can check the official guidance here:
Record keeping matters more than most landlords realise
HMRC expects landlords to keep clear, accurate records of:
- All rent received
- Dates payments were received
- Income from services provided to tenants
- Any refunds or adjustments made
Poor records are one of the most common reasons landlords struggle during HMRC checks or end up paying more tax than necessary.
4. Allowable expenses landlords can usually claim
One of the biggest advantages of completing a Self Assessment return correctly is claiming the right expenses. As a general rule, HMRC allows landlords to deduct costs that are wholly and exclusively incurred for the rental business. Claiming legitimate expenses reduces your taxable rental profit and, in turn, your tax bill.
Common allowable expenses for landlords
While every property is different, landlords can often claim the following costs:
- Letting agent and property management fees, including tenant-finding and ongoing management charges.
- Repairs and maintenance, such as fixing leaks, repairing boilers, repainting, or replacing broken fixtures, provided the work restores the property rather than upgrades it.
- Service charges and ground rent, where these apply to leasehold properties.
- Landlord insurance, including buildings, contents, and public liability cover.
- Safety and compliance checks, such as gas safety certificates, electrical safety reports, and fire safety assessments.
- Replacement of domestic items, including like-for-like replacement of furnishings, white goods, and appliances under the replacement of domestic items relief.
- Accountancy and professional fees that relate specifically to preparing rental accounts or property tax advice.
HMRC’s rental income guidance sets out the broader rules and record-keeping expectations for landlords:
Repairs vs improvements: the classic landlord trap
One of the most common areas of confusion is the difference between a repair and an improvement. Getting this wrong can lead to incorrect claims and potential HMRC challenges.
- Repair: Work that restores something to its original condition or standard. This is usually deductible as an allowable expense.
- Improvement: Work that upgrades the property beyond its original standard. This is normally treated as capital expenditure and not deducted from rental income.
For example, replacing a broken kitchen unit with a similar one is usually a repair. Installing a higher-spec kitchen where none existed before is likely to be an improvement.
If you carry out a large refurbishment between tenancies, the work may include a mix of repairs and improvements. In these cases, it is important to separate the costs clearly in your records so allowable expenses can be claimed correctly.
5. Replacing domestic items: relief landlords can still use
The old “wear and tear” allowance is no longer available. However, most landlords can still claim tax relief when replacing certain items in a residential rental property by using Replacement of Domestic Items Relief.
This relief applies where you provide items for tenants to use and later replace them. It is designed to cover normal wear and replacement, rather than upgrades.
What qualifies for Replacement of Domestic Items Relief?
Landlords can usually claim relief for the like-for-like replacement of movable items supplied as part of the tenancy, including:
- Beds, sofas, tables and chairs
- Carpets, curtains and blinds
- Fridges, freezers, washing machines and dishwashers
- Other domestic appliances provided for tenant use
The key point is that the relief applies to replacements, not the initial purchase of items for a new or unfurnished property.
What does not qualify?
- Items bought for a property that was previously unfurnished
- Significant upgrades beyond a reasonable modern equivalent
- Fixtures that form part of the building itself
If the replacement is an upgrade, HMRC normally allows relief only up to the cost of a like-for-like item, with any additional cost treated as capital expenditure.
HMRC explains how this relief works, and how it interacts with repair costs, in its Property Income Manual: Replacement of domestic items relief (HMRC)
Record keeping makes or breaks this claim
To support a claim for Replacement of Domestic Items Relief, HMRC expects clear evidence of:
- The cost of the replacement item
- That the item replaced an existing item provided with the tenancy
- The date the replacement was made











