How is rental income taxed in the UK?

Rental profit is generally added to your other taxable income. The tax depends on gross rent, allowable property expenses, finance cost rules and your wider income position.

Do I pay tax on rent or rental profit?

Landlords usually pay tax based on rental profit rather than gross rent, but mortgage interest and finance costs may be treated under specific rules.

Can landlords deduct mortgage interest?

Residential property finance costs are not usually deducted in the same simple way as ordinary expenses. They may instead be handled through a basic-rate tax reduction depending on the circumstances.

Do I need Self Assessment for rental income?

You may need to report rental income through Self Assessment depending on the amount and your circumstances. Check HMRC guidance if you rent out property.

What expenses can landlords claim?

Common landlord expenses can include letting agent fees, repairs, insurance, service charges, safety certificates, advertising and accountancy fees, where they relate to the rental activity.

Which calculator should landlords use?

Use the Rental Income Tax Calculator for rent and expenses, the Buy-to-Let Tax Calculator for property investment assumptions, and the Self Assessment Payment Calculator to plan payment timing.

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Reviewed: 2 June 2026

Written by Conor Dwyer

How rental income tax works for UK landlords

Rental income tax in the UK is not based simply on the rent that arrives in your bank account. Landlords usually need to understand gross rent, allowable property expenses, rental profit, mortgage interest rules, other taxable income and Self Assessment deadlines. This can feel especially confusing for accidental landlords, first-time buy-to-let owners and people who rent out one property alongside a PAYE job. This guide explains how rental income tax works in practical terms, with relatable examples, common mistakes and links to calculators that can help you estimate your position before filing a tax return.

Guidance only, not tax, legal, accounting or financial advice

Related calculator included

Reviewed when UK tax guidance changes

Important information

This guide is for general information only and does not constitute tax, legal, accounting or financial advice. Rental property tax can be complex, especially where mortgage interest, joint ownership or large repairs are involved. Check your position with HMRC or a qualified adviser.

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Who this guide applies to

UK landlords
buy-to-let owners
people with rental income
accidental landlords
property investors
Self Assessment taxpayers

Common costs to consider

letting agent fees
repairs and maintenance
landlord insurance
service charges
ground rent
accountancy fees
advertising for tenants
replacement domestic items
mortgage interest and finance costs

What counts as rental income?

Rental income usually includes the rent paid by tenants for use of your property. It can also include other payments connected to the letting, such as payments for services, furniture, parking, cleaning or utilities if they are charged as part of the arrangement. The starting point is gross rental income before deducting expenses. If a letting agent deducts their fee before paying you, it is still useful to understand the full rent charged and the fee deducted. Looking only at the net bank transfer can make your records less clear. For example, if your tenant pays £1,200 per month and your letting agent deducts £120 before sending you £1,080, your records should still show the rent and the agent fee separately. That makes it easier to calculate rental profit properly.

Rental profit is different from rent received

The tax question is usually based on rental profit, not just rent received. Rental profit is broadly rental income minus allowable property expenses. If a property brings in £14,400 of rent in a tax year and allowable expenses are £3,000, the starting profit figure may be £11,400 before considering finance cost rules and your wider tax position. This distinction matters because two landlords with the same rent can have very different tax positions. One landlord may have high service charges, repairs and letting agent fees. Another may have very few costs. A rental income tax calculator can help estimate the difference between gross rent and taxable profit, but the estimate is only as useful as the records you enter.

Common allowable expenses for landlords

Allowable property expenses are costs that are genuinely connected to renting out the property. Common examples include letting agent fees, landlord insurance, repairs and maintenance, accountancy fees, safety certificates, advertising for tenants, service charges, ground rent, cleaning between tenancies and some replacement domestic items. Repairs are usually different from improvements. Replacing a broken boiler with a similar modern boiler may be a repair, while adding a new extension or significantly improving the property may be treated differently. This is an area where landlords should be careful. Keep invoices, receipts, contractor records and notes explaining what work was done. If the cost is large or could be seen as an improvement, check HMRC guidance or speak to an accountant.

Mortgage interest and finance costs

Mortgage interest is one of the biggest areas of confusion for buy-to-let landlords. The rules for residential property finance costs changed over time, and landlords generally no longer deduct mortgage interest from rental income in the same simple way many people expect. Instead, finance costs may be handled through a basic-rate tax reduction, depending on the circumstances. This can mean a landlord with a mortgage has a taxable profit figure that looks higher than their real cash profit. For example, if rent is £18,000 and mortgage interest is £7,000, you may feel that only £11,000 is left before other costs. But the tax calculation may not treat the interest as a normal expense deduction. This is why buy-to-let tax estimates can surprise landlords, especially higher-rate taxpayers.

Rental income alongside a PAYE job

Many landlords earn rental income alongside employment. PAYE tax deducted from your salary does not automatically settle tax on rental profit. Your rental profit is usually added to your other taxable income when working out your overall tax position. This means a landlord with a salary may pay tax on rental profit at their marginal rate. If your salary already uses your Personal Allowance, the rental profit may be taxable from the first pound of profit. If your salary is near a higher tax band, rental income could push some income into that band. This is one reason two landlords with similar properties may have different tax bills. The property numbers matter, but so does your wider income.

Do landlords need Self Assessment?

Landlords may need to report rental income through Self Assessment, depending on the amount of income, profit and other circumstances. HMRC has guidance on paying tax when renting out property and on Self Assessment tax returns. If you are a new landlord, it is better to check early rather than waiting until January. You may need time to register, receive details and prepare records. This is especially important for accidental landlords, such as someone who keeps a former home and rents it out after moving. Even if the property does not feel like a business, the rental income may still need to be reported. Keep records from the first rent payment so you are not trying to reconstruct the year later.

Example: first-time landlord with one rental property

Imagine Lewis rents out a flat for £1,100 per month. Over the tax year, the gross rent is £13,200. His letting agent fees are £1,320, landlord insurance is £220, repairs are £750, safety certificates cost £180 and accountancy support costs £250. Before mortgage interest rules, his basic rental profit after those costs is £10,480. Lewis also has a PAYE salary. Because his salary already uses his Personal Allowance, the rental profit may increase his tax bill. If Lewis has a mortgage on the property, finance cost rules may also affect the final calculation. A rental income tax calculator can help him understand the rough property profit and tax impact, while a Self Assessment payment calculator can help him plan what might be due by the payment deadline.

Example: accidental landlord after moving home

Now imagine Priya moves in with her partner and rents out her old home. She does not think of herself as a property investor, but she receives rent every month. Her mortgage, insurance, repairs and agent fees all need to be tracked carefully. Because she also has a full-time job, the rental profit is added to her employment income. Priya’s main risk is assuming that because the rent only just covers the mortgage and costs, there is no tax issue. That may not be true, especially because mortgage interest may not be treated as a normal expense deduction. Accidental landlords often need the same record-keeping discipline as professional landlords, even if they only own one rented property.

Record keeping for rental income

Good rental records should show rent charged, rent received, letting agent statements, maintenance invoices, insurance, service charges, ground rent, mortgage interest statements, safety certificates, advertising costs and any periods where the property was empty. If you use a letting agent, download statements regularly. If you pay contractors, keep invoices and proof of payment. If you buy replacement items, keep receipts and notes. If the property is partly let or has mixed use, records become even more important. A simple spreadsheet can work well for one property. Useful columns include date, type of income or expense, supplier, description, amount and evidence location. Cleaner records make calculator estimates more useful and make Self Assessment much less stressful.

Common landlord tax mistakes

Common mistakes include using net agent payments instead of gross rent and separate fees, treating improvements as repairs, forgetting small costs, misunderstanding mortgage interest, ignoring rental income because PAYE tax is already deducted, and leaving records until the filing deadline. Another mistake is not setting aside money for tax because the rental income is immediately used for mortgage payments or repairs. Tax is based on the tax calculation, not simply on whether the property feels cash-rich. Landlords should also avoid relying on generic online comments because property tax rules can be specific and depend on the facts. If the property has significant mortgage interest, large repairs, joint ownership, furnished letting, overseas elements or a limited company structure, advice may be especially useful.

Using rental, landlord and buy-to-let calculators

A rental income tax calculator is useful when your main question is how rental income and expenses may turn into taxable profit. A landlord tax calculator can help frame the wider landlord position. A buy-to-let tax calculator is useful where mortgage interest and property investment assumptions matter. None of these tools replaces a tax return, but they can help you understand the moving parts before you file. Enter gross rent, not just the bank transfer. Enter expenses carefully. If the calculator asks for other income, include your PAYE salary or other taxable income so the estimate reflects your wider position. If you are planning for the payment deadline, use a Self Assessment payment calculator as a follow-up to estimate what might be due.