If you’re renting out property in the UK — whether it’s a single flat, a house with lodgers, or a portfolio of buy-to-let investments — there’s one certainty: HMRC wants to know about it, and you’ll need to pay tax on it.
The question most landlords ask isn’t “do I pay tax?” but “how much tax do I pay, and how is it actually calculated?”
The answer isn’t always straightforward. Rental income tax in the UK depends on your total income, what expenses you can claim, whether you’re using the property allowance, and how mortgage interest relief works now that the rules have changed.
This guide breaks it all down step by step, so you know exactly what you’re dealing with.
Do You Pay Tax on Rental Income in the UK?
Yes. If you’re a UK resident landlord and you earn money from renting out property, that income is taxable.
It doesn’t matter if it’s:
- A single room in your home
- A buy-to-let property
- Multiple rental properties
- Commercial property (shops, offices, etc.)
- A property abroad (if you’re a UK resident)
Rental income is treated the same way as income from employment or self-employment — it’s added to your other income for the year, and you pay Income Tax on the total.
The only time you might not pay tax is if your rental income is below £1,000 per year (we’ll explain this in more detail below). But even if you earn less than that, you might still need to report it to HMRC depending on your total income.
What Counts as Rental Income?
Before you can work out your tax bill, you need to understand what HMRC considers rental income.
It’s not just the rent your tenants pay — it includes any money you receive in connection with the property.
Here’s what counts:
Rent payments
This is the obvious one. If your tenant pays you £1,200 a month, that’s £14,400 of gross rental income per year.
Charges for services you provide
If you charge tenants for things like:
- Cleaning shared areas
- Gardening
- Utilities (gas, electric, water)
- Broadband or TV licence
…these count as rental income too, even though you’re passing some of the money straight on to service providers.
For example, if your tenant pays you £1,000 in rent plus £50 towards utilities, your total rental income is £1,050 per month — not just £1,000.
Advance rent or deposits you keep
If a tenant pays you rent in advance (say, they pay three months upfront), that’s taxable in the year you receive it, not the year it covers.
Similarly, if you keep part or all of a tenant’s deposit because of damage or unpaid rent, that’s income too.
Premiums on short leases
If you grant a lease on a property for less than 50 years and charge a premium (an upfront lump sum), part of that premium is taxable as rental income. This mostly applies to commercial properties, but it’s worth knowing about.
What doesn’t count as rental income?
Money you receive as a genuine loan repayment or a refund doesn’t count. For example, if a tenant accidentally overpays rent and you refund them, that’s not income.
How is Rental Income Taxed?
Here’s the key thing to understand: you don’t pay tax on the full amount of rent you receive. You only pay tax on your rental profit — which is your rental income minus any allowable expenses.
Let’s break this down.
Step 1: Work out your total rental income
Add up everything you’ve received from tenants over the tax year (6 April to 5 April). This is your gross rental income.
Example:
You charge £1,200 per month in rent. Over the tax year, you receive:
- £14,400 in rent
- £600 from the tenant for utilities
Total rental income = £15,000
Step 2: Deduct your allowable expenses
Allowable expenses are costs you’ve incurred “wholly and exclusively” for the purpose of renting out the property. These might include:
- Letting agent fees
- Insurance (landlord insurance, buildings insurance)
- Repairs and maintenance
- Utility bills you pay (if not recharged to the tenant)
- Council tax (if the property is empty)
- Ground rent and service charges
We’ll cover expenses in more detail below, but for now, let’s say you spent £3,500 on allowable expenses.
Rental income: £15,000
Minus expenses: £3,500
= Rental profit: £11,500
Step 3: Add your rental profit to your other income
Your rental profit gets added to any other income you earn — from your job, self-employment, pensions, savings, investments, etc.
Let’s say you also earn £30,000 from your job.
Job income: £30,000
Rental profit: £11,500
= Total income: £41,500
Step 4: Apply your Personal Allowance
Everyone in the UK gets a Personal Allowance — the amount you can earn before you pay any tax. For 2025/26, this is £12,570 (unless you earn over £100,000, in which case it reduces).
In our example:
Total income: £41,500
Minus Personal Allowance: £12,570
= Taxable income: £28,930
Step 5: Calculate the tax you owe
You pay tax at the following rates for 2025/26:
| Income band | Tax rate |
| £0 – £12,570 | 0% (Personal Allowance) |
| £12,571 – £50,270 | 20% (Basic rate) |
| £50,271 – £125,140 | 40% (Higher rate) |
| Over £125,140 | 45% (Additional rate) |
In our example, your £28,930 of taxable income falls entirely within the basic rate band, so you pay 20% tax on it.
Tax owed: £28,930 × 20% = £5,786
If some of your income falls into the higher rate band (over £50,270), you’d pay 40% on that portion.
The £1,000 Property Allowance: Do You Qualify?
If your gross rental income is £1,000 or less in a tax year, you benefit from the Property Allowance.
This means:
- You don’t have to report the income to HMRC
- You don’t pay any tax on it
- You don’t need to fill out a Self Assessment tax return (unless you have other reasons to file one)
It’s completely automatic — you don’t need to claim it.
What if you earn between £1,000 and £2,500?
If your rental income is between £1,000 and £2,500, you still need to tell HMRC about it, but you might not need to complete a full Self Assessment tax return. You can use HMRC’s “Let Property Campaign” or contact them directly to report it.
What if you earn more than £2,500?
Once your gross rental income exceeds £2,500, you must register for Self Assessment and file a tax return every year.
Can you use the Property Allowance if you earn more than £1,000?
Yes — but only if you choose to.
If your rental income is, say, £3,000, you have two options:
Option 1: Claim the Property Allowance
You automatically get £1,000 tax-free, so you only pay tax on £2,000.
But here’s the catch: if you claim the Property Allowance, you can’t deduct any expenses.
Option 2: Claim actual expenses
If your expenses are more than £1,000, it’s better to deduct the actual costs.
Example:
You earn £3,000 in rent and spend £1,800 on repairs, insurance, and letting fees.
- With Property Allowance: Taxable income = £3,000 – £1,000 = £2,000
- With actual expenses: Taxable income = £3,000 – £1,800 = £1,200
You’d save more tax by claiming actual expenses.
You can’t do both — it’s one or the other.
Allowable Expenses: What Can Landlords Claim?
This is where landlords can legitimately reduce their tax bill.
Allowable expenses are costs that are:
- Wholly and exclusively for the purpose of renting out the property
- Not capital expenses (we’ll explain this below)
Here’s what you can claim:
Repairs and maintenance
You can claim the cost of repairing or maintaining the property to keep it in its current condition.
Allowable:
- Fixing a broken boiler
- Repairing a leaking roof
- Replacing broken windows
- Repainting walls
Not allowable:
- Adding an extension
- Installing a new bathroom where there wasn’t one before
- Renovating the property beyond simple repairs
The key test is: are you restoring it to its original condition, or are you improving it?
Repairs are allowable. Improvements are capital expenses and can’t be deducted from rental income (though they may reduce Capital Gains Tax when you sell).
Letting agent fees and management costs
If you use a letting agent, their fees are fully deductible. This includes:
- Finding tenants
- Collecting rent
- Property management
- Arranging repairs
Insurance
You can claim:
- Landlord insurance
- Buildings insurance
- Contents insurance (if you provide furniture)
Utility bills, council tax, and service charges
If you pay for utilities, council tax, or ground rent, these are allowable — as long as the tenant isn’t paying you back for them.
If the tenant reimburses you, it counts as income (which you’ve already declared), so you can also claim it as an expense. It balances out.
Professional fees
Accountant fees, legal fees, and property surveyor costs related to letting the property are all allowable.
Replacement of domestic items
If you provide furnishings (sofas, beds, washing machines, etc.) and need to replace them, you can claim the cost — as long as you’re replacing a like-for-like item.
For example:
- Replacing an old sofa with a new sofa: Allowable
- Replacing a single bed with a double bed: Not allowable (that’s an improvement)
Costs of evicting a tenant
Legal costs and court fees for evicting a non-paying tenant are allowable.
What you can’t claim
- Mortgage capital repayments — Only interest qualifies (see below)
- Your own time or labour — You can’t claim for work you do yourself
- Improvements — Adding a conservatory, loft conversion, or new kitchen
- Initial furnishing costs — The first time you furnish a property, it’s a capital cost
Mortgage Interest Relief: How It Works Now
This is where things get a bit complicated.
Before April 2020, landlords could deduct mortgage interest as an expense before calculating their rental profit. That meant if you paid £10,000 in mortgage interest, you could reduce your taxable rental income by £10,000.
That’s changed.
Since April 2020, you can no longer deduct mortgage interest from your rental income. Instead, you get a basic rate tax credit equal to 20% of your mortgage interest payments.
Here’s how it works:
Example: How mortgage interest relief works in 2025/26
You earn £20,000 in rental income and spend £5,000 on other expenses (repairs, insurance, etc.).
Your mortgage interest for the year is £12,000.
Old system (before 2020):
Rental income: £20,000
Minus expenses: £5,000
Minus mortgage interest: £12,000
= Rental profit: £3,000
Tax at 20% = £600
New system (from 2020):
Rental income: £20,000
Minus expenses: £5,000
= Rental profit: £15,000 (mortgage interest is NOT deducted)
Tax at 20% = £3,000
But, you get a tax credit of 20% of £12,000 = £2,400
Final tax bill: £3,000 – £2,400 = £600
In this example, the result is the same.
When does the new system cost you more?
The problem arises if your rental profit pushes you into the higher rate tax band (over £50,270).
Example:
You earn £45,000 from your job and £15,000 in rental profit (after deducting expenses but before mortgage interest).
Total income: £60,000
Because your total income is over £50,270, part of your rental profit is taxed at 40%, not 20%.
But your mortgage interest tax credit is still only 20% — so you’re paying 40% tax on income but only getting 20% relief on the interest.
This is why some landlords have moved their properties into limited companies, where mortgage interest can still be fully deducted.
Do Landlords Pay National Insurance on Rental Income?
No.
Rental income is not subject to National Insurance — only Income Tax.
This is true whether you’re a basic rate, higher rate, or additional rate taxpayer.
What If You Own Multiple Properties?
If you own more than one rental property in the UK, HMRC treats them as a single property business.
This means:
- You add up all the rental income from all properties
- You add up all the expenses across all properties
- You calculate one overall profit or loss
Example:
- Property 1: £12,000 income, £8,000 expenses = £4,000 profit
- Property 2: £10,000 income, £11,500 expenses = £1,500 loss
Total profit: £4,000 – £1,500 = £2,500
You only pay tax on the £2,500 overall profit.
What about overseas properties?
If you own rental properties outside the UK, they’re treated separately. You can’t offset losses on a UK property against profits on an overseas property (or vice versa).
What If You Make a Loss?
If your rental expenses exceed your rental income, you make a loss.
You can’t claim this loss back as a refund, but you can carry it forward and offset it against future rental profits.
Example:
- 2024/25: You make a £2,000 loss
- 2025/26: You make a £5,000 profit
You can deduct the £2,000 loss from the previous year, so you only pay tax on £3,000 in 2025/26.
Losses can be carried forward indefinitely until you use them up.
How to Report Rental Income to HMRC
If your gross rental income is more than £2,500 (or more than £1,000 if you want to claim expenses), you need to file a Self Assessment tax return.
Step 1: Register for Self Assessment
If you’ve never filed a tax return before, you need to register with HMRC. You can do this online at GOV.UK.
You’ll get a Unique Taxpayer Reference (UTR) in the post within about 10 days.
Step 2: Complete the UK Property pages
When you fill out your Self Assessment, you’ll complete the UK Property section. This is where you declare:
- Your total rental income
- Your total allowable expenses
- Your mortgage interest payments (for the 20% tax credit)
- Any losses you’re carrying forward
Step 3: File by 31 January
The deadline to file your tax return online is 31 January after the end of the tax year.
For example, for the 2025/26 tax year (6 April 2025 to 5 April 2026), the deadline to file is 31 January 2027.
Step 4: Pay any tax owed
Any tax you owe is also due by 31 January. If you owe more than £1,000, HMRC may also ask for payments on account — advance payments towards next year’s tax bill, paid in July and January.
What Records Do You Need to Keep?
HMRC expects you to keep accurate records of your rental income and expenses for at least 5 years after the 31 January filing deadline.
You should keep:
- Rental income records: Tenancy agreements, rent receipts, bank statements showing rent payments
- Expense records: Invoices, receipts, bank statements showing payments for repairs, insurance, agent fees, etc.
- Mortgage statements: Showing interest paid
- Records of any capital improvements: These won’t reduce your rental income tax, but they’ll be useful when you sell the property (for Capital Gains Tax)
If HMRC opens an enquiry into your tax return and you can’t provide evidence, they can:
- Disallow your expenses
- Estimate your income (usually higher than reality)
- Charge penalties for poor record-keeping
Should You Use a Limited Company for Buy-to-Let?
Some landlords set up a limited company to own their rental properties instead of owning them personally.
The main advantage: you can still deduct mortgage interest in full when calculating Corporation Tax.
How it works
If your property is owned by a limited company:
- The company pays Corporation Tax on rental profits (19% for most companies in 2025/26)
- Mortgage interest is fully deductible as a business expense
- You don’t pay Income Tax on rental income — the company does
Is it worth it?
It depends on your situation. Transferring property into a limited company can trigger Stamp Duty and Capital Gains Tax, so it’s not always straightforward.
Limited companies work best for:
- Higher rate taxpayers (40% or 45%)
- Landlords with large mortgages
- People building a long-term property portfolio
If you’re considering this, speak to an accountant who specialises in property tax.
Common Mistakes Landlords Make With Rental Income Tax
Here are the mistakes we see most often:
1. Not declaring rental income because “it’s under the Personal Allowance.”
Even if your total income is below £12,570, you still need to declare rental income if it’s over £1,000 (or £2,500 if you’re not claiming expenses). The fact that you don’t owe tax doesn’t mean you don’t need to report it.
2. Claiming capital improvements as expenses
Adding a new bathroom, extending the property, or refurbishing the whole house are improvements, not repairs. You can’t deduct these from rental income (though they may reduce Capital Gains Tax later).
3. Forgetting to claim mortgage interest relief
You don’t automatically get the 20% tax credit — you have to declare your mortgage interest on your tax return. If you forget, you’ll overpay tax.
4. Not keeping records
If HMRC asks for proof of your expenses and you can’t provide it, they’ll disallow them — and you’ll owe more tax (plus interest and possibly penalties).
5. Mixing personal and rental expenses
If you live in the property part of the time, or use it for holidays, you can only claim expenses for the period it was actually rented out.
What Happens If You Don’t Declare Rental Income?
Not declaring rental income is tax evasion, and HMRC takes it seriously.
If HMRC discovers you haven’t declared rental income, they can:
- Charge you the tax you should have paid, plus interest
- Issue a penalty (which can be 30%, 70%, or even 100% of the tax owed, depending on whether they think you were careless or deliberate)
- Open a full investigation into all your tax affairs
Even if it was a genuine mistake, “I didn’t know I had to declare it” isn’t a defence.
Final Thoughts
Rental income tax doesn’t have to be complicated, but you do need to understand the rules.
Here’s the short version:
- You pay Income Tax on your rental profit (income minus expenses)
- You can claim a wide range of allowable expenses to reduce your tax bill
- Mortgage interest no longer reduces your profit, but you get a 20% tax credit instead
- You must file a Self Assessment tax return if your rental income exceeds £2,500 (or £1,000 if claiming expenses)
- Keep accurate records for at least 5 years
If you’re not confident handling this yourself — or if your tax situation is complex (multiple properties, high income, limited company structure) — it’s worth getting professional help.
At Applegrow Financial Advisors, we specialise in helping landlords with their tax returns, Self Assessment, and tax planning. We’ll make sure you’re claiming every allowable expense, paying the right amount of tax, and staying fully compliant with HMRC.
Get in touch and let us take the stress out of rental income tax.
Need Help With Your Rental Income Tax?
Whether you’re a first-time landlord or managing a property portfolio, we’re here to help. We handle everything from Self Assessment tax returns to tax planning strategies that legally reduce your bill.
Contact us today to find out how we can help.
