Landlord Tax Guide: Rental Income, Allowable Expenses, and Self-Assessment

Tax Is Unavoidable — But Understanding It Helps

If you receive rental income from a property in England, you are legally required to declare it to HMRC and pay the appropriate tax. Many private landlords find the tax system confusing, particularly given the changes to mortgage interest relief that have significantly increased the tax burden for higher-rate taxpayers.

This guide sets out the key tax obligations for private landlords in England, the expenses you can legitimately deduct, and the practical steps for filing your self-assessment return correctly.

You are taxed on your rental profit, not your total rental income. Understanding what you can deduct is the key to getting your tax right.

How Rental Income Is Taxed

Rental income from property is treated as property income for tax purposes. It is added to your other income (employment, pensions, savings, etc.) and taxed at your marginal rate.

Tax Bands (2025/26)

Your rental profit is added on top of your other income. If your employment income already puts you in the higher-rate band, your rental profit will be taxed at 40% (or 45%).

The Property Income Allowance

If your total property income is less than £1,000 in a tax year, you do not need to declare it or pay tax on it. This is the property income allowance. However, if your income exceeds £1,000, you must declare the full amount — you cannot simply deduct £1,000 from it (unless you choose to use the allowance instead of deducting actual expenses, which is rarely beneficial for landlords with mortgages and significant costs).

Allowable Expenses

You can deduct certain expenses from your rental income before calculating your taxable profit. These must be wholly and exclusively for the purpose of letting the property.

Common Allowable Expenses

• Letting agent fees and management costs
• Buildings and contents insurance
• Council tax (if you are liable, e.g., during void periods)
• Water rates (if you pay them)
• Gas, electricity, and other utilities (if included in the rent)
• Repairs and maintenance (but not improvements — see below)
• Legal and professional fees for routine matters (e.g., renewing a tenancy, chasing arrears)
• Accountancy fees for preparing your rental accounts
• Advertising for tenants
• Ground rent and service charges (leasehold properties)
• Landlord safety certificates (gas, electrical, EPC)

Repairs vs Improvements

This is one of the most common areas of confusion. Repairs are allowable expenses; improvements are not (though they may reduce your Capital Gains Tax liability when you sell).

The distinction is straightforward in principle:

• Repair: Restoring something to its previous condition. Replacing a broken boiler with a similar boiler, fixing a leaking roof, repainting walls.
• Improvement: Enhancing the property beyond its previous condition. Adding an extension, converting a loft, installing a new kitchen where there was none before.

If you replace a like-for-like item (e.g., replacing an old kitchen with a modern one of equivalent quality), this is generally treated as a repair. If you upgrade significantly (e.g., replacing a basic kitchen with a high-end one), only the cost of a like-for-like replacement is deductible — the additional cost is an improvement.

Mortgage Interest Relief: The Tax Credit System

This is the change that has had the greatest impact on landlord profitability. Since April 2020, landlords can no longer deduct mortgage interest as an expense from their rental income. Instead, they receive a tax credit at the basic rate (20%) on their mortgage interest payments.

How It Works

1. Calculate your rental profit without any deduction for mortgage interest. This is your gross rental income minus all other allowable expenses.
2. Pay tax on that profit at your marginal rate (20%, 40%, or 45%).
3. Receive a tax credit equal to 20% of your mortgage interest payments. This credit reduces your tax bill, but it does not reduce your taxable income.

Why This Matters for Higher-Rate Taxpayers

If you are a basic-rate taxpayer, the effect is broadly neutral — you get a 20% credit instead of a 20% deduction, which produces the same result.

If you are a higher-rate taxpayer, the impact is significant. You are taxed on your rental profit at 40%, but only receive relief on your mortgage interest at 20%. The difference comes directly out of your pocket.

Example

A landlord receives £12,000 rental income per year, has £3,000 in allowable expenses, and pays £6,000 in mortgage interest.

The tax bill has doubled for this higher-rate taxpayer.

Replacement of Domestic Items Relief

Since April 2016, landlords letting furnished properties cannot claim a "wear and tear allowance." Instead, you can claim Replacement of Domestic Items Relief — the cost of replacing furnishings, appliances, and household items, less any amount received for the old item.

This covers:

• Furniture (beds, sofas, tables, chairs)
• White goods (fridge, washing machine, cooker)
• Carpets and curtains
• Crockery and cutlery

The relief applies only to replacements, not to the initial furnishing of a property.

Capital Gains Tax on Property Sales

When you sell a rental property, you may be liable for Capital Gains Tax (CGT) on any profit. The current CGT rates for residential property are:

• 18% for basic-rate taxpayers
• 24% for higher and additional-rate taxpayers

You must report the disposal and pay any CGT due within 60 days of the completion date using HMRC's online service. This is separate from your self-assessment return.

Filing Your Self-Assessment Return

If you have rental income above the £1,000 property income allowance, you must register for self-assessment with HMRC (if you are not already registered) and file a tax return each year.

Key Dates

• 5 October following the end of the tax year: deadline to register for self-assessment if you are new to it
• 31 October: deadline for paper returns
• 31 January: deadline for online returns and payment of tax due

What You Need

• Records of all rental income received
• Receipts and invoices for all allowable expenses
• Mortgage interest statements from your lender
• Details of any periods when the property was empty

Getting Professional Advice

Tax is one area where professional advice almost always pays for itself for private landlords in England. A good accountant will ensure you claim all legitimate expenses, structure your affairs efficiently, and avoid costly mistakes. Accountancy fees for rental property are themselves an allowable expense. If you manage your rental property without a letting agent, keeping meticulous tax records becomes even more important.

Further Reading

• How Much Can a Landlord Increase Rent? — Market rent rules that directly affect your taxable rental income.
• Energy Efficiency Improvements for Rental Property — Capital improvements vs allowable expenses and their tax treatment.
• Private Landlord Insurance Guide — Insurance premiums are an allowable deduction for landlords in England.