How much tax do landlords
pay in the UK?

What is rental income tax and who pays it?

Any UK resident who lets out a property, whether a buy-to-let investment, a furnished holiday let, a room in their own home above the Rent-a-Room Scheme threshold, or commercial premises, must pay Income Tax on their rental profits. The tax applies to individuals, partnerships, and trusts; limited companies pay Corporation Tax on property profits instead. Rental income is pooled with all other income and taxed at Income Tax rates of 20%, 40%, or 45% depending on your total income.

Rental profit is calculated as rental income minus allowable expenses. Allowable expenses include letting agent fees, buildings and contents insurance, repairs and maintenance (not improvements), ground rent and service charges, council tax and utilities paid by the landlord, accountancy fees for preparing rental accounts, and legal fees for tenancy agreements. Since April 2020, mortgage interest is no longer an allowable expense: it is replaced by a 20% tax credit under the Section 24 rules.

The £1,000 property allowance offers a simpler alternative for landlords with low expenses. If your total property allowance expenses are below £1,000, you can claim the flat £1,000 deduction instead of itemising each cost. If your rental income itself is below £1,000, you do not need to declare it to HMRC at all. The calculator above automatically selects whichever method produces the lower tax bill.

How rental income tax is calculated in 2025/26

Rental income tax is calculated in two stages under the Section 24 regime. In stage one, calculate your rental profit: total rental income minus allowable expenses (excluding mortgage interest). In stage two, add this rental profit to your other income and calculate your total Income Tax liability at the relevant rates. Then separately calculate 20% of your mortgage interest costs, and deduct that figure from your tax bill as a credit.

The critical consequence of this approach is that your rental income before the mortgage interest credit inflates your total income for tax purposes. A landlord with a £40,000 salary and £15,000 rental income (after allowable expenses but before mortgage interest) has a combined income of £55,000, which pushes £4,730 of income into the higher rate band. Even if £12,000 of that rental income is absorbed by mortgage payments, the inflated income figure has already pushed them into the 40% band. The 20% credit (£2,400) then partially offsets this, but the landlord still faces a higher effective rate on their rental profit than they would have pre-2017.

Rental losses, when allowable expenses exceed rental income, can be carried forward and set against future rental profits from the same property business. They cannot be set against other income sources. Losses accumulate each year and reduce your future rental tax bills once the property returns to profit. Accurate record-keeping from the start of each tenancy is essential to establishing the loss position correctly.

How to legally reduce your rental income tax bill

Section 24 has dramatically reduced the available tax reduction strategies for mortgaged landlords, but several legitimate approaches remain effective. The goal is to either reduce the taxable rental income or reduce the total income that determines which band applies.

Pension contributions are particularly powerful for landlords. Every pound contributed to a pension reduces your adjusted net income, potentially bringing rental profits back below the 40% threshold. A landlord whose combined salary and rental income exceeds £50,270 by £5,000 can make a £5,000 pension contribution to remain entirely within the basic rate band, saving approximately £1,000 in higher-rate Income Tax on that slice. If your income is approaching £100,000, pension contributions can also restore your tapered Personal Allowance.

Common mistakes landlords make with rental income tax

Rental income tax has become more complex since Section 24 was introduced, and the mistakes landlords make have become more expensive as a result. These are the errors that HMRC compliance campaigns most frequently identify.

Still deducting mortgage interest in full. Despite Section 24 applying in full from April 2020, some landlords, particularly those self-completing their returns, still deduct mortgage interest as an expense rather than applying it as a 20% credit. This understates taxable income and results in an underpayment of tax, which HMRC will pursue with interest and potentially penalties.

Claiming capital improvements as repairs. Routine maintenance (replacing like-for-like) is an allowable expense. Capital improvements, such as adding an extension, converting a loft, or installing a new kitchen that significantly enhances the property beyond its original state, are capital expenditure, not an income deduction. They are deductible against CGT when the property is eventually sold, but not against rental income in the year incurred.

Missing the property allowance option. Many landlords with low-value properties, lodger income, or holiday let income spend time recording and itemising expenses that amount to less than £1,000. Claiming the flat property allowance is simpler and removes the need for detailed expense records altogether.

Not declaring overseas rental income. UK residents must declare worldwide income, including rental income from properties abroad. HMRC has data-sharing agreements with many overseas tax authorities and property registries. Foreign rental income is reported on the foreign pages of the Self Assessment return, with a credit available for any overseas tax already paid on the same income.

Ignoring MTD obligations from April 2026. Landlords with rental income above £50,000 (alone or combined with self-employment income) must make quarterly MTD submissions from April 2026. Many landlords are unaware that this applies to property income and assume it is only relevant to sole traders. Starting with compliant record-keeping software now avoids a compliance crisis in 2026.

Reporting rental income to HMRC: deadlines and requirements

Rental income must be reported on a Self Assessment tax return for every tax year in which you receive it, provided it exceeds the £1,000 property allowance. If you have rental income but have never filed Self Assessment, you must notify HMRC by 5 October following the end of the first tax year in which you received rental income. Failing to notify HMRC is treated as a failure to notify chargeability, which carries penalties of up to 100% of the unpaid tax in serious cases.

If you let a furnished holiday let, additional rules apply. The property must be available to let for at least 210 days, actually let for at least 105 days, and not let to the same person for more than 31 consecutive days for more than 155 days in the year. Qualifying furnished holiday lets historically benefited from Capital Gains Tax reliefs and could generate pensionable earnings. HMRC announced changes to the FHL rules taking effect from April 2025: check the current guidance before filing.

From April 2026, landlords with income above £50,000 (combined property and self-employment) must comply with Making Tax Digital for Income Tax Self Assessment, submitting quarterly digital updates to HMRC. Annual Summary submissions replace the current end-of-year Self Assessment return. TapTax handles the full MTD reporting cycle, from quarterly updates through to the final declaration, for landlords and sole traders alike.