Buy-to-Let Mortgages
Whether you’re purchasing your first rental property or expanding an existing portfolio, we help UK-based landlords find the right buy-to-let mortgage, from mainstream lenders through to specialist providers for more complex circumstances.
Based Overseas Rather Than in the UK?
Our Expat Buy-to-Let Mortgages page covers the specific considerations for overseas-based landlords – foreign currency income, country-of-residence risk, and the lenders genuinely suited to non-UK-resident applicants.
What Is a Buy-to-Let Mortgage?
A buy-to-let mortgage is a loan specifically designed for purchasing a property with the intention of renting it out, rather than living in it yourself. Unlike a residential mortgage, lenders assess affordability primarily against the property’s rental income potential rather than your personal salary alone.
Deposit Requirements
Most buy-to-let lenders require a minimum deposit of 25%, higher than the deposit typically expected for a residential purchase. A larger deposit generally gives access to better rates and makes it easier to meet a lender’s rental coverage requirement.
How Rental Income Is Assessed
Lenders apply an Interest Coverage Ratio calculation, typically requiring rental income to cover between 125% and 145% of the mortgage payment, calculated at a stressed interest rate rather than your actual pay rate – protecting both you and the lender if rates were to rise. The exact percentage required depends on your tax band and the specific lender’s criteria.
Worked Example
On a mortgage payment of £1,000 a month, you’d typically need to demonstrate achievable rent of at least £1,250 to £1,450, depending on the lender’s stress-tested rate and your tax position.
Why Stress Testing Exists
Stress testing assumes a higher interest rate than you’re actually paying when calculating whether rental income covers the mortgage, ensuring affordability holds up even if rates rise during your mortgage term. It’s worth understanding that your actual monthly payment may be lower than the figure used in this calculation, but the lender needs to see the property would remain viable even under less favourable conditions.
Stamp Duty on Buy-to-Let Purchases
Buy-to-let purchasers pay standard Stamp Duty rates plus a 3% surcharge on each band. On a £200,000 property, this works out as £7,500 total (3% on the first £125,000 plus 5% on the remaining £75,000), compared with £1,500 for an owner-occupier buying the same property – a £6,000 difference that cannot be added to the mortgage itself.
Personal Name or Limited Company: Section 24 and Tax Considerations
Since Section 24 took full effect, mortgage interest can no longer be deducted from rental income for personally owned buy-to-let property – instead, you receive a 20% tax credit on the interest paid. This significantly increases the effective tax cost for higher-rate taxpayers, which is why many landlords now purchase through a limited company (SPV) structure instead, where mortgage interest remains deductible as a business expense and profits are taxed at the generally lower corporation tax rate.
Which Structure Is Right for You?
This is genuinely a tax decision as much as a mortgage one, and it’s worth discussing your specific circumstances with an accountant alongside your mortgage broker before deciding which structure to purchase through. What suits a higher-rate taxpayer building a long-term portfolio often differs from what suits someone buying a single rental property as a modest side income.
Interest-Only vs Repayment
Many buy-to-let mortgages are arranged on an interest-only basis, keeping monthly payments lower and maximising cash flow, though the full capital must be repaid at the end of the term – typically through selling the property or refinancing. Repayment options are also available if you’d prefer to gradually reduce the mortgage balance over the term.
Fixed vs Tracker Rates
Fixed-rate buy-to-let mortgages keep your payment stable for an agreed period, offering certainty for budgeting, while tracker rates move in line with the Bank of England base rate, potentially offering lower payments when rates are falling but less predictability. It’s worth discussing your own risk tolerance and how long you plan to hold the mortgage before choosing between the two, rather than defaulting to whichever seems cheapest at the point of application.
Portfolio Landlords
If you hold, or are building toward, four or more mortgaged buy-to-let properties, you’re typically classed as a portfolio landlord, which brings additional assessment requirements – lenders will want to understand your entire portfolio’s overall profitability and experience, not just the specific property you’re financing. Some lenders now offer dedicated portfolio products accommodating up to ten mortgaged properties, with borrowing typically available up to 75% of value and loan sizes commonly ranging from £25,000 to £1 million.
First-Time Landlords
If this is your first buy-to-let purchase, affordability criteria can be somewhat stricter than for an experienced landlord, and some lenders require a minimum period – commonly six months – before you can apply for a second buy-to-let mortgage. It’s worth understanding these restrictions upfront if you’re planning to expand quickly.
Fleet-Style Criteria Enhancements
Some lenders have recently relaxed certain criteria for landlords, including removing set minimum income thresholds in favour of simply verifying that income exists, and extending maximum mortgage terms beyond the traditional 30 years. It’s worth checking current criteria with your broker, since this part of the market moves quickly and older assumptions about standard requirements can become outdated.
Ongoing Costs to Budget For
Beyond the mortgage payment itself, ongoing landlord costs typically include letting agent fees (8-15% of rent for full management), buildings and landlord insurance, a maintenance allowance (commonly 10-15% of annual rent), an allowance for void periods (typically 4-6 weeks a year), gas safety certificates, electrical inspections, and any applicable landlord licensing fees. It’s worth calculating your net yield accounting for all of these, rather than relying on gross yield alone.
Landlord Licensing
Some local authorities require landlords to hold a licence for rental properties in their area, particularly for houses in multiple occupation or in designated selective licensing zones. It’s worth checking whether your specific property location requires licensing before you complete a purchase, since operating without a required licence can carry significant penalties.
Right to Rent Checks
Before letting a property, landlords are legally required to check that tenants have the right to rent in the UK, verifying identity documents and immigration status before a tenancy begins. This is a genuine legal obligation, not an optional courtesy, and it’s worth understanding what documentation satisfies this requirement, or using a letting agent who handles this check as part of their standard process, since the penalties for letting to someone without the right to rent can be significant.
Letting Agent vs Self-Managing
Using a full-management letting agent takes on tenant sourcing, referencing, rent collection, and day-to-day maintenance coordination in exchange for a fee, typically 10-15% of rent, while self-managing saves this cost but requires your own time and availability to handle issues as they arise. It’s worth honestly assessing how much time and local availability you genuinely have before deciding – a landlord who travels frequently or lives some distance from the property often finds a managing agent worthwhile despite the cost, while a hands-on landlord living nearby may prefer to manage directly and keep the full rental yield.
Let-Only Services as a Middle Ground
Some agents offer a let-only service, finding and referencing a tenant for a one-off fee while leaving ongoing management to you, which can suit landlords comfortable handling day-to-day issues themselves but who want professional support with the initial tenant-finding and legal paperwork.
Property Condition Requirements
If tenants will be living in the property, it needs a functioning kitchen and bathroom and must meet general health, safety, and liveability standards – this is worth checking before committing to a purchase, particularly for older or renovation-needed properties.
Energy Performance and EPC Requirements
Rental properties need to meet minimum energy efficiency standards to be let legally, and it’s worth checking a target property’s current EPC rating before purchase, since bringing an older property up to the required standard can involve genuine cost worth factoring into your budget.
Remortgaging an Existing Buy-to-Let
If you already own a buy-to-let property, remortgaging when your current deal ends works on similar principles to the original purchase – rental cover and property value both matter, and it’s worth reviewing your options ahead of your current deal expiring rather than automatically rolling onto your lender’s standard variable rate, which is typically considerably more expensive.
Frequently Asked Questions
How much deposit do I need for a buy-to-let mortgage?
Most lenders require a minimum of 25%, though a larger deposit generally gives access to better rates and easier rental cover approval.
Are buy-to-let mortgages interest-only?
Many are, though repayment options are also available – worth discussing which suits your cash flow and long-term plans.
Should I buy through a limited company or in my personal name?
This depends on your tax position – limited company ownership avoids the Section 24 mortgage interest restriction, but involves corporation tax and different considerations, worth discussing with an accountant.
Can first-time landlords get a buy-to-let mortgage?
Yes, though affordability criteria may be stricter than for an experienced landlord, and some lenders require a waiting period before a second buy-to-let application.
What counts as a portfolio landlord?
Typically holding four or more mortgaged buy-to-let properties, which brings additional assessment of your whole portfolio rather than just the property being financed.
Do I need a licence to let out my property?
Some local authorities require licensing, particularly for HMOs or in selective licensing areas – worth checking your specific property’s location before completing a purchase.
What is a Right to Rent check and is it my responsibility?
Yes – landlords are legally required to verify a tenant’s right to rent in the UK before a tenancy begins, either personally or through a letting agent handling this on your behalf.
Should I use a letting agent or manage the property myself?
This depends on your available time and proximity to the property – full management costs 10-15% of rent but removes day-to-day involvement, while self-managing saves cost but requires genuine availability.
Should I choose a fixed or tracker rate?
This depends on your risk tolerance and how long you plan to hold the mortgage – fixed rates offer payment certainty, tracker rates can be cheaper when rates fall but less predictable.
What happens when my buy-to-let mortgage deal ends?
It’s worth reviewing your remortgage options ahead of time rather than rolling onto your lender’s standard variable rate, which is typically more expensive.
Get in touch with details of the property and your circumstances, and we’ll help you find the right buy-to-let mortgage from our panel of lenders.
