Buy-to-Let
The Ultimate UK Buy-to-Let Mortgage Guide 2026
Buy-to-let lending is based mainly on the rent, not your salary. Most lenders want a 25% deposit and rent that covers the mortgage by a set margin at a stressed rate. Tax and regulation have changed a lot, so the structure you buy in matters as much as the rate.
Written and reviewed by Davi Thakar, CeMAP qualified mortgage and protection adviser Updated
A buy-to-let mortgage is a loan on a property you rent out rather than live in. Lenders size it mainly on the rent, not your salary, so the deposit, the rental test and the tax all work differently from a mortgage on your own home.
The lender’s real question is simple: if the tenant pays, does the rent cover the mortgage with room to spare? Get that right and most of the rest follows.
This guide covers how buy-to-let lending works in 2026, the tests lenders use, the choice between buying personally or through a limited company, the tax and regulation landlords now face, and the specialist types of buy-to-let. Each section links to a detailed guide. If you want advice on your own purchase, see our buy-to-let mortgage advice.
How does a buy-to-let mortgage work?
It is lent against the rent. You usually need a 25% deposit, and the expected rent must cover the mortgage interest by a set margin at a stressed rate. Most landlords pay interest-only. Lenders also check your credit, your personal income and your experience, but the property’s numbers carry most of the weight.
At a glance
| Typical position in 2026 | |
|---|---|
| Minimum deposit | Usually 25%. Some lenders 20%, a few 15% |
| How much you can borrow | Set mainly by the rent, using an interest cover ratio |
| Personal income | Many lenders want a minimum, often around £25,000 |
| Repayment type | Most landlords choose interest-only |
| Regulation | Usually unregulated, unless letting to close family |
| Stamp Duty | Higher rates, 5% above standard rates in England and Northern Ireland |
Which situations do lenders see most?
These are illustrative situations, not Option Finance client outcomes.
Your first rental
You own your home and want one flat to let. Most lenders will consider you if you meet their minimum income and the rent passes their test.
Check the rent before you offerHigher-rate taxpayer
Your salary puts you in the higher-rate band, so personal ownership means a 145% cover test and limited tax relief on interest.
Compare personal and company routes firstBuying a fourth property
You already have three mortgaged rentals. The new lender will look at your whole portfolio, not just the new purchase.
Have a property schedule readyLow yield, high value
The property is in an expensive area and the rent falls short of the test at a 75% loan.
Look at five-year fixes or top slicingHow much can you borrow on a buy-to-let?
Lenders use an interest cover ratio (ICR): the rent must cover the mortgage interest by a set margin, calculated at a stressed interest rate rather than your actual rate.
- Basic-rate taxpayers and limited companies: often 125% cover.
- Higher-rate taxpayers: often 145% cover.
- Stress rate: often around 5.5% or more on two-year deals. Many lenders test five-year fixes at, or close to, the actual rate, which can let you borrow more.
Illustration only
A flat lets for £1,100 a month. At 125% cover and a 5.5% stress rate, the maximum interest-only loan is about £192,000. At 145% cover, it falls to about £166,000. If the lender tests a five-year fix at 4.5% with 125% cover, it rises to about £235,000, subject to the deposit.
Some lenders let you top slice, using your personal income to make up a rental shortfall. That can help in high-value, lower-yield areas.
Published rental cover rules (checked 17 October 2026)
| Lender (source) | Rental cover and stress rate |
|---|---|
| The Mortgage Works | 125% for basic-rate taxpayers and limited companies, 160% for higher-rate taxpayers |
| Santander | 125% basic rate, 145% higher rate. Purchases tested at 7.5% on deals under 5 years and 5.5% on 5-year fixes. No limited companies |
| Accord | 125% basic rate, 145% higher rate. Under 5 years: the higher of 5.5% or the pay rate plus 2%. 5 years or more: the higher of 4.75% or the pay rate plus 0.5% |
| Skipton | 125% basic rate, 145% higher rate and portfolio landlords. Under 5 years: the higher of the pay rate plus 2% or 5.5%. 5-year fixes: the higher of the pay rate plus 1% or 5.5% |
| Leeds | 125% basic rate, 145% higher rate, 150% additional rate, 125% limited company. Higher for HMOs and holiday lets |
| Coventry | 125% basic rate and limited company, 145% higher rate. 5-year fixes and longer: the higher of 4.5% or the pay rate |
| Aldermore | 125% basic rate and limited company, 140% higher rate (single properties). 5-year fixes: the higher of the pay rate or 4% |
| Fleet | 125% standard rate and limited company, 145% higher rate |
| Vida | 125% limited company and basic rate, 145% higher rate. 5-year fixes assessed on the initial rate |
| Zephyr | 125% lower rate and limited company, 140% other taxpayers. 5-year products at 125% on the product rate |
What this tells you: the same property can borrow very different amounts depending on the lender, your tax band and the length of the fix. A 5-year fix is often the key to borrowing more, because several lenders test it at or near the actual rate.
Top slicing (using your own income to make up a rent shortfall) is offered by Accord, with minimum non-rental income of £40,000 for experienced landlords or £75,000 for first-time landlords, and by Skipton with its own income conditions. The Mortgage Works, Leeds and Vida say they do not allow it.
These are summaries of each lender’s published broker criteria, checked on 17 October 2026. Criteria change often and meeting a rule does not guarantee approval.
How much deposit do you need for a buy-to-let?
| Loan-to-value | Typical choice |
|---|---|
| 60% or less | The lowest rates |
| 75% | The most common level, wide choice |
| 80% | Fewer lenders, higher rates |
| 85% | A small number of lenders |
HMOs, holiday lets and new limited companies may need 25% to 30%. A larger deposit often matters for the rental calculation as well as the rate.
Can first-time landlords and first-time buyers get a buy-to-let?
First-time landlords, yes. First-time buyers, only with a few lenders. Most lenders want you to own your own home already. The published rules we checked in October 2026:
| Lender (source) | First-time landlords | First-time buyers | Minimum income |
|---|---|---|---|
| The Mortgage Works | Accepted, up to 80% LTV | Only with an existing property owner on the application | None |
| Santander | At least one applicant must own a UK property | Not accepted | £25,000 for one applicant |
| NatWest | Considered | Considered, without top slicing | None |
| Accord | Accepted up to 80% LTV if one applicant owns their home | Not stated | None published, except for top slicing |
| Skipton | Accepted if they own their home | Not accepted | £20,000 |
| Leeds | Accepted up to 75% LTV | One applicant must own and live in their home | None |
| Coventry | Accepted, including limited companies | Not accepted | None |
| Aldermore | Accepted after 12 months as a homeowner, up to 75% LTV | Not covered | £25,000 for first-time landlords |
| Fleet | Accepted if they have owned a home for 12 months | Not accepted | None |
These are summaries of each lender’s published broker criteria, checked on 17 October 2026. Criteria change often and meeting a rule does not guarantee approval.
Should you buy personally or through a limited company?
Since mortgage interest relief for individual landlords was restricted, many landlords buy through a limited company, usually a special purpose vehicle (SPV) set up only to hold property.
| Personal ownership | Limited company | |
|---|---|---|
| Mortgage interest | 20% tax credit, rising to 22% from April 2027 | Deducted as a business cost |
| Tax on profits | Income tax. Property rates rise by 2% from April 2027 | Corporation tax, 19% to 25% |
| Taking money out | Profits are yours after tax | Dividends or salary are taxed again |
| Mortgage choice | Widest | Good and growing, rates sometimes slightly higher |
| Rental cover | 125% or 145% | Usually 125% |
There is no single right answer. It depends on your tax band, how many properties you have, whether you need the income now and your long-term plans. Moving existing properties into a company usually triggers Stamp Duty and Capital Gains Tax. Read our limited company buy-to-let guide and take advice from a tax adviser.
Should you choose interest-only or repayment?
Most landlords choose interest-only, because it keeps payments low and maximises cash flow. You still owe the full loan at the end, usually repaid by selling or refinancing. Repayment builds equity but reduces monthly profit. See our guides to interest-only buy-to-let and repayment buy-to-let, and offset buy-to-let mortgages.
How are landlords taxed in 2026?
- Income tax. Rental profit is added to your other income. GOV.UK explains how to report it in its guide to paying tax on rental income. From April 2027, property income will have its own rates in England, Wales and Northern Ireland: 22%, 42% and 47%. Finance cost relief will be given at 22%.
- Mortgage interest. Individual landlords cannot deduct it. They receive a basic-rate tax credit on it instead.
- Stamp Duty. In England and Northern Ireland, buying an additional home usually means paying 5% above the standard rates on the whole price. On a £250,000 buy-to-let, that is £15,000 rather than £2,500. Scotland and Wales have their own surcharges. See GOV.UK’s guidance on buying an additional residential property, or use our Stamp Duty calculator.
- Capital Gains Tax. Gains on residential property are taxed at 18% or 24%, and you must report and pay within 60 days of completion. See GOV.UK’s guide to tax when you sell property.
Read our buy-to-let tax changes guide for the detail, and check the position after the Budget on 28 October 2026.
What does the Renters’ Rights Act change?
From 1 May 2026, most private tenancies in England became assured periodic tenancies, and section 21 “no-fault” evictions ended. Landlords now need a valid ground under section 8 to regain possession, such as selling, moving in or rent arrears. Rent can be increased once a year through a formal process. A landlord database and an Ombudsman are being introduced. GOV.UK sets out the detail in its Renters’ Rights Act overview for landlords.
Lenders are adjusting too. Some now ask about tenancy terms and possession grounds when assessing risk. Make sure you understand your obligations before you buy.
Which specialist types of buy-to-let are there?
| Type | Key points | Guide |
|---|---|---|
| HMO | Higher yields, licensing, specialist lenders | HMO mortgages |
| Holiday let | Assessed on holiday income, tax rules changed in April 2025 | Holiday let mortgages |
| Letting to family | Usually regulated buy-to-let | Regulated buy-to-let |
| New build | Lower loan-to-value limits on some flats | New build buy-to-let |
| Mixed use or multi-unit | Commercial-style lending | Commercial buy-to-let |
| Living abroad | Expat lenders, currency checks | Expat buy-to-let |
What changes if you are a portfolio landlord?
If you own four or more mortgaged buy-to-let properties, lenders treat you as a portfolio landlord under Prudential Regulation Authority rules. They look at your whole portfolio, not just the new property: rents, mortgages, loan-to-value and cash flow across all of it. Expect a property schedule, business plan and cash-flow forecast. See our portfolio landlord guide.
When should you remortgage a buy-to-let?
Most landlords remortgage every two to five years, to avoid the standard variable rate or to release equity for another purchase. The rental test applies again, so a rise in rates can limit how much you can raise. See our buy-to-let remortgage guide.
What if your situation is less straightforward?
- First-time buyer landlord: buy-to-let for first-time buyers.
- Past credit problems: buy-to-let with bad credit.
- Self-employed: many lenders still want personal income evidence. See our self-employed mortgage guide.
- Letting your current home and buying another: let to buy mortgages.
What should you check before you buy?
- Check the numbers net, not gross. Yield after agent fees, maintenance, insurance, voids and tax is what you keep.
- Test the rent against lenders’ calculations before you offer.
- Decide the ownership structure with an accountant first. Changing later is expensive.
- Budget for compliance: gas and electrical safety, EPC, deposit protection, licensing where required, and Renters’ Rights Act obligations.
- Plan the exit. Know how you would repay an interest-only loan, and the Capital Gains Tax on a sale.
Frequently asked questions
How much deposit do I need for a buy-to-let mortgage?
Usually 25%. Some lenders accept 20% and a few 15%, but rates are higher and the rental test is harder to pass with a smaller deposit.
How much rent do I need for a buy-to-let mortgage?
Enough to cover the mortgage interest by the lender’s ratio, often 125% or 145%, at a stressed rate. On a £150,000 interest-only loan tested at 5.5% with 125% cover, that is about £860 a month.
Should I buy a rental property in a limited company?
It can suit higher-rate taxpayers and landlords planning to grow, because mortgage interest is deducted as a cost. Taking money out is taxed again, so take advice from a tax adviser first.
Do I need a minimum income for a buy-to-let mortgage?
Many lenders want a minimum personal income, often around £25,000. Some have no minimum if the rental figures are strong.
What is changing for landlords’ tax?
From April 2027, property income in England, Wales and Northern Ireland will be taxed at 22%, 42% and 47%, and finance cost relief will be given at 22%. Further changes may follow at the Budget on 28 October 2026.
What does the Renters’ Rights Act mean for landlords?
From 1 May 2026, most private tenancies in England became periodic and section 21 evictions ended. Landlords need a valid section 8 ground to regain possession, and rent increases follow a formal annual process.
What is a portfolio landlord?
Lenders treat you as a portfolio landlord if you own four or more mortgaged buy-to-let properties. They then assess your whole portfolio, not just the new purchase.
Is a buy-to-let mortgage regulated?
Usually not. It is regulated if you or a close family member will live in the property, for example letting to your children or parents.
Speak to Option Finance about your buy-to-let mortgage
Tell us about the property, the rent and how you plan to own it. We will tell you straight what lenders are likely to offer, how the rental test works out and what to have ready.
Our broker fee is £499 in total: £299 on application and £200 when a mortgage offer is issued. The £299 is fully refundable if the application is declined.
Book a free initial consultation using the enquiry form below. See our buy-to-let mortgage advice, or read our guides to limited company buy-to-let and buy-to-let tax changes.
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Some buy-to-let and commercial mortgages are not regulated by the Financial Conduct Authority. Regulation depends on the mortgage type and circumstances.
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Written and reviewed by Davi Thakar
Director & Senior Mortgage Broker
CeMAP Qualified Mortgage and Protection Adviser
Davi founded Option Finance with a vision to deliver transparent mortgage advice from a wide panel of lenders. With over 10 years in financial services, he specialises in complex cases including adverse credit, self-employed borrowers with limited trading history, and large buy-to-let portfolios. He works directly on complex cases and explains each option clearly.
Meet Davi Thakar
