Landlord Tax Obligations UK 2026: What You Need to Know

Tax is one of the least exciting but most consequential aspects of being a landlord. Get it wrong and you face penalties, interest charges, and potentially a tax investigation. Get it right and you ensure you are not paying more than you legally owe.

This guide covers the key tax obligations for individual landlords in the UK in 2026, including income tax on rental income, allowable expenses, mortgage interest relief, capital gains tax on property disposals, stamp duty, and the Making Tax Digital requirements that are now in effect.

Disclaimer: This guide is for information only and does not constitute legal or tax advice. Always consult a qualified accountant or tax adviser for your specific circumstances.

Income Tax on Rental Income

What counts as rental income

Rental income is the total rent you receive from your tenants during the tax year (6 April to 5 April), as outlined in HMRC's guidance on rental income. This includes:

• Regular monthly rent payments
• Any one-off payments the tenant makes for use of the property (e.g., a premium for early access)
• Income from furnished holiday lets (different rules apply — see HMRC guidance)
• Insurance payouts that compensate for lost rent

It does not include:

• The tenant's deposit (this is held on trust, not income)
• Reimbursement of utility bills if the tenant pays you back at cost

Cash basis vs accruals basis

Most landlords with rental income below £150,000 per year will use the cash basis — you report income when you receive it and expenses when you pay them. This is simpler and is the default for most individual landlords.

The accruals basis reports income when it is earned (when rent falls due) and expenses when they are incurred (when the service is provided), regardless of when money actually changes hands. This can be more appropriate if you have significant year-end timing differences.

You can choose which basis to use, but you must be consistent. If you are unsure, the cash basis is generally simpler and suitable for most self-managing landlords with a small portfolio.

Tax rates for 2025/26

Rental income is added to your other income (employment, self-employment, pensions) and taxed at your marginal rate:

If your total income (including rental income) exceeds £100,000, your personal allowance is reduced by £1 for every £2 of income above this threshold, effectively creating a 60% marginal rate between £100,000 and £125,140.

The property income allowance

If your gross rental income is £1,000 or less per year, you do not need to report it to HMRC — this is the property income allowance. However, if your income exceeds £1,000, you must report the full amount (you cannot deduct £1,000 and report the remainder).

Allowable Expenses

Allowable expenses reduce your taxable rental profit. You can deduct the cost of running and maintaining the property, but not the cost of improving it (capital expenditure is treated differently).

Revenue expenses you can deduct

• Insurance — buildings insurance, landlord liability insurance, rent guarantee insurance
• Letting agent fees — management fees, tenant-find fees (note that under the Tenant Fees Act 2019, you cannot pass these on to tenants — see our guide to what landlords can charge tenants)
• Accountancy fees — the cost of preparing your rental accounts and tax return
• Legal fees — for renewing a tenancy, eviction proceedings, debt recovery (but not the initial purchase of the property)
• Maintenance and repairs — fixing a boiler, repainting walls, replacing broken windows, plumbing repairs. The key distinction is that repairs restore the property to its previous condition; improvements enhance it beyond that
• Ground rent and service charges — if the property is leasehold
• Council tax — only during void periods when the property is unlet and you are liable
• Utility bills — only during void periods or if included in the rent
• Advertising — costs of advertising the property for let (Rightmove, OpenRent, etc.)
• Travel expenses — the cost of travelling to the property for management purposes (inspections, meeting contractors, resolving maintenance issues). You can claim mileage at 45p per mile for the first 10,000 miles and 25p thereafter
• Stationery, phone calls, and postage — costs directly related to managing the tenancy
• Safety certificates — gas safety checks, EPC, EICR, smoke alarm testing
• Professional memberships — NRLA or other landlord association membership fees
• Replacement of domestic items — replacing furniture, appliances, carpets, and curtains in a furnished or part-furnished let (Replacement of Domestic Items Relief)

Capital expenditure — what you cannot deduct from rental income

Capital expenditure improves the property or adds something new. These costs cannot be deducted from rental income, but they may reduce your Capital Gains Tax liability when you sell.

Examples of capital expenditure:

• Building an extension
• Converting a loft
• Installing a new kitchen (if it is an improvement, not a like-for-like replacement)
• Adding central heating where none existed before
• Installing double glazing for the first time
• Fitting an EV charge point you pay for yourself (a new installation, not a replacement)

The distinction between a repair (deductible) and an improvement (capital) is one of the most common areas of confusion. HMRC's general rule: if you are restoring the property to its previous condition using modern materials, it is a repair. If you are enhancing it beyond what was there before, it is an improvement.

For example:

• Replacing a single-glazed window with a single-glazed window: repair
• Replacing a single-glazed window with double glazing: improvement (the additional element of double glazing is capital expenditure, though HMRC may accept the cost of a single-glazed replacement as a repair deduction)

Replacement of domestic items relief

If you let a furnished or part-furnished property, you can claim relief when you replace domestic items such as:

• Furniture (beds, sofas, tables, chairs)
• Furnishings (curtains, carpets, linen)
• Appliances (washing machine, fridge, cooker)
• Kitchenware and crockery

The relief covers the cost of the replacement item, but only up to the cost of an equivalent item — not an upgrade. If you replace a basic washing machine with a premium model, you can only deduct what a basic replacement would have cost.

You cannot claim for the initial provision of items — only replacements.

Track every expense, stay on top of every deadline. LetSorted helps you manage compliance documents, track rent payments, and keep your records organised — so tax season is stress-free. Start managing your properties →

Mortgage Interest Relief

The restriction

Since Section 24 of the Finance Act 2015 was fully phased in by April 2020, individual landlords can no longer deduct mortgage interest from rental income. Instead, you receive a tax credit at the basic rate (20%) of your mortgage interest payments. For a detailed breakdown of how this works in practice, see our guide to mortgage interest deduction for UK landlords.

This means:

• You calculate your rental profit without deducting mortgage interest
• You then receive a 20% tax credit on the mortgage interest you paid
• If you are a basic rate taxpayer, the effect is neutral — you are in the same position as before
• If you are a higher rate (40%) or additional rate (45%) taxpayer, you pay more tax than under the old rules

Example

Suppose you receive £12,000 rent per year, have £3,000 in allowable expenses, and pay £5,000 in mortgage interest. You are a higher rate taxpayer.

Old system (pre-2020):

• Rental profit: £12,000 - £3,000 - £5,000 = £4,000
• Tax at 40%: £1,600

Current system:

• Rental profit: £12,000 - £3,000 = £9,000 (no mortgage interest deduction)
• Tax at 40%: £3,600
• Less 20% tax credit on mortgage interest: £5,000 x 20% = £1,000
• Net tax: £3,600 - £1,000 = £2,600

The difference — £1,000 more tax per year — is the effect of the restriction. For highly leveraged landlords with large mortgages, this change has been significant.

Limited company landlords

This restriction does not apply to landlords who hold property through a limited company. Companies can deduct mortgage interest in full as a business expense. This is one of the reasons some landlords have transferred properties to company structures, though this triggers stamp duty and potentially capital gains tax on the transfer, so professional advice is essential.

Capital Gains Tax on Property Sales

When you sell a rental property, you may owe Capital Gains Tax (CGT) on the profit. The gain is calculated as the sale price minus the purchase price, minus allowable costs.

Current CGT rates for residential property (2025/26)

These rates apply to the gain after your CGT annual exempt amount, which is currently £3,000 per year.

Allowable deductions from the gain

You can deduct:

• Purchase costs (solicitor fees, stamp duty, survey costs)
• Sale costs (estate agent fees, solicitor fees, EPC)
• Capital improvement costs (extensions, conversions, new installations — keep receipts)
• Costs of establishing or defending your title

60-day reporting and payment

You must report and pay CGT on a UK residential property disposal within 60 days of completion. This is done through the HMRC CGT on UK Property service (online). Failure to report within 60 days attracts penalties.

You still include the disposal on your Self Assessment return for the tax year, but the 60-day payment is an advance payment on account.

Private Residence Relief

If you lived in the property as your main home at any point, you may be entitled to Private Residence Relief for the period you occupied it, plus the final 9 months of ownership (regardless of whether you lived there during that period). This can significantly reduce or eliminate the CGT liability.

Stamp Duty Land Tax

When purchasing a buy-to-let property, you pay Stamp Duty Land Tax (SDLT) at the standard rates plus a 5% surcharge (increased from 3% in October 2024) if you already own another residential property.

Current SDLT rates with surcharge (2025/26)

The surcharge applies to the entire purchase price at the relevant band, not just the portion above each threshold. This is a significant upfront cost that affects the viability of buy-to-let investments.

Making Tax Digital for Income Tax

Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) is now in effect for landlords with qualifying income above certain thresholds.

Who it affects

• From April 2026: landlords and self-employed individuals with gross income over £50,000
• From April 2027: those with gross income over £30,000
• Future phases may lower the threshold further

What it requires

Instead of filing a single annual Self Assessment return, you must:

• Keep digital records of income and expenses using MTD-compatible software
• Submit quarterly updates to HMRC (every 3 months)
• Submit a final declaration at the end of the tax year

What it means in practice

If your rental income exceeds the threshold, you need to:

1. Choose MTD-compatible software (several options are available, including free ones for simple portfolios)
2. Record each item of income and expenditure digitally as it occurs
3. Submit a summary to HMRC at the end of each quarter
4. File a final year-end declaration

The quarterly updates are summaries, not full tax returns — they report total income and expenses for the period. The final declaration is where you make any adjustments and finalise your tax position.

Penalties for non-compliance

HMRC operates a points-based penalty system. Each late quarterly submission earns a penalty point. Once you reach a threshold (typically 4 points for quarterly submissions), you incur a fixed penalty of £200. Points expire after a period of compliance.

Record-Keeping Requirements

Regardless of whether you fall under MTD, you must keep records of:

• All rental income received (bank statements showing rent credits)
• All expenses claimed (receipts, invoices, bank statements)
• Mortgage interest statements
• Safety certificates and compliance costs
• Travel logs (dates, destinations, mileage, purpose)
• Deposit protection records
• Capital expenditure receipts (for CGT purposes when you sell)

Records must be kept for at least 5 years after the 31 January filing deadline for the relevant tax year. For capital expenditure records, keep them for 5 years after you sell the property and report the disposal.

Practical Tips

Separate your finances. Use a dedicated bank account for rental income and expenses. This makes record-keeping dramatically easier and ensures you do not miss deductible expenses or fail to report income.

Keep receipts digitally. Photograph or scan every receipt and store them in a folder organised by tax year. Paper receipts fade and get lost. Digital copies are acceptable for HMRC.

Track mileage. If you visit your property for inspections, maintenance, or management purposes, log each trip with the date, destination, mileage, and purpose. The 45p per mile deduction adds up over a year.

Review your structure. If you are a higher rate taxpayer with significant mortgage interest, speak to an accountant about whether a limited company structure would be more tax-efficient. The savings can be substantial, but the transfer costs and complexities are real.

File on time. The Self Assessment deadline is 31 January following the end of the tax year (5 April). Late filing incurs an automatic £100 penalty, rising to £10 per day after 3 months.

Summary

Frequently Asked Questions

Do I need to file a Self Assessment tax return as a landlord?

Yes. If your rental income exceeds £1,000 per year (the property income allowance), you must register for Self Assessment and file an annual tax return with HMRC. From April 2026, landlords with gross income over £50,000 must also comply with Making Tax Digital quarterly reporting requirements.

Can I deduct the cost of a new kitchen from my rental income?

It depends on whether the new kitchen is a repair or an improvement. A like-for-like replacement of an existing kitchen is a deductible repair. However, if you upgrade to a significantly higher-specification kitchen, the additional cost is treated as capital expenditure and cannot be deducted from rental income — though it may reduce your Capital Gains Tax when you sell.

What happens if I miss the 60-day deadline for reporting Capital Gains Tax on a property sale?

HMRC imposes a late filing penalty starting at £100. If the return is more than 6 months late, you may face additional penalties based on the tax owed. Interest is also charged on the unpaid CGT from the 60-day deadline. You should report and pay as soon as possible to minimise penalties.

Managing a rental property is a business, and HMRC treats it as one. Keeping accurate, organised records throughout the year makes your tax return straightforward, ensures you claim every expense you are entitled to, and protects you if HMRC asks questions.

LetSorted helps landlords keep organised records of rental income, expenses, and compliance documentation — the same records you need for your tax return. When everything is in one place from day one, tax season is a matter of exporting your data rather than reconstructing it from memory.