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Buy-to-let mortgage advice for property investors and landlords

Buy-to-Let Mortgage Advice

Clear guidance for first-time landlords, portfolio purchases and refinancing an existing rental property.

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Buy-to-let guidance

Understand the mortgage alongside the wider decision

A buy-to-let mortgage is a residential mortgage secured on an investment property you intend to rent out to tenants rather than occupy as your own home, assessed primarily on the property's rental income potential rather than personal salary alone. Whether you are purchasing your first rental property, expanding an existing portfolio, or refinancing an established let, the lender criteria, tax considerations, and deposit requirements differ substantially from owner-occupier borrowing.

Lenders may consider the expected rent, the amount you want to borrow, your personal circumstances, your experience as a landlord and the type of property and tenancy. From our Southampton mortgage broker office, we help landlords across Hampshire and the UK understand the questions a lender is likely to ask, compare suitable mortgage options and prepare an application around the details of your plans. Where a property involves mixed residential and commercial use, non-standard refurbishment, or corporate borrowing, we also coordinate semi-commercial mortgages, commercial property finance, and bridging and development finance, alongside our ongoing buy-to-let market insights.

Editorial & compliance review: Reviewed by Nigel Kent, CeMAP-qualified Mortgage and Protection Adviser (FCA Ref 947349) • Last reviewed: • Primary tax & company references: HM Revenue & Customs (HMRC), Revenue Scotland, Welsh Revenue Authority, and Companies House.

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Mortgage types

What is a buy-to-let mortgage?

A standard residential mortgage is intended for a home occupied by the borrower. A buy-to-let mortgage is normally used where the property will be let to tenants. The lender therefore needs to understand both the borrower and the proposed rental property.

Many buy-to-let mortgages are arranged on an interest-only basis, although repayment options are also available. Rates, fees, early repayment charges, deposit requirements and property criteria can differ from residential mortgage types. Some buy-to-let arrangements fall within a consumer buy-to-let framework, while other forms of buy-to-let mortgage are not regulated by the Financial Conduct Authority.

The right route depends on how the property will be used, who will own it and whether the application is being made as an individual or through a company.

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Rental assessment

How lenders assess a buy-to-let mortgage

The expected rent is usually central to a lender's assessment. A valuer may provide an opinion of the property's market rent, and the lender can test that figure against the proposed mortgage payment using its own rental coverage calculation and stressed interest rate.

That calculation is not the same across the market. Depending on the lender and circumstances, personal income, tax position, landlord experience, existing borrowing and the wider portfolio may also be considered. Some lenders can take account of personal income where the rent does not meet their usual calculation, but this is not available or appropriate in every case.

An advertised rent is not a guarantee of the figure a lender's valuer will use, and a mortgage being affordable under lender criteria does not by itself mean the property will meet all of its real-world costs. We will explain the assessment used by a suitable lender and the information required before an application is submitted.

Talk through the lender assessment
Landlord and mortgage adviser reviewing a buy-to-let rental assessment

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Your contribution

Deposit, equity and loan-to-value

For a purchase, the deposit is the difference between the price of the property and the amount borrowed. For a remortgage, the equivalent is the equity left in the property after the proposed mortgage is taken into account.

Loan-to-value, often shortened to LTV, expresses the mortgage as a percentage of the property's value. For example, borrowing £180,000 against a property valued at £240,000 would be 75% LTV. This is an illustration of the calculation, not an indication that a particular product or loan amount will be available.

Buy-to-let mortgages commonly require more deposit or equity than a residential mortgage, but there is no single minimum that applies to every applicant or property. The available LTV can depend on rental coverage, property type, ownership structure, experience, credit profile and lender criteria. A larger deposit may widen the options available, but it should be considered alongside purchase tax, legal costs, refurbishment and a reserve for ongoing expenses.

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Your background

First-time, experienced and portfolio landlords

First-time landlords may be buying their first rental property while already owning their own home, or they may be first-time buyers as well as first-time landlords. Lenders treat these situations differently. Some accept them and others require previous ownership or landlord experience.

Existing landlords may need to provide details of current properties, mortgages, rents and commitments even where the new application relates to one property.

Portfolio landlords are assessed under lender-specific portfolio rules. The lender may review the performance and borrowing across the portfolio, not only the property being purchased or refinanced. The definition of a portfolio landlord and the documents requested can vary, so the position should be checked before choosing a product.

Tell us about the full picture at the outset. This helps avoid selecting a lender whose criteria do not fit the applicant or wider portfolio.

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The proposed property

The property and the tenancy matter

Buy-to-let lenders do not assess every property in the same way. Construction, condition, value, location, lease length, service charges and demand for the proposed tenancy can affect whether a property is acceptable. Flats above or near commercial premises, new-build properties, houses in multiple occupation and properties requiring substantial work may need a more specialist approach.

The intended use must also be clear. A standard single-tenancy buy-to-let, a house in multiple occupation, student accommodation, a holiday let and short-term accommodation are not interchangeable. They can involve different mortgages, planning requirements, licences, insurance and management responsibilities.

Do not assume that a mortgage labelled buy-to-let permits every type of letting. The proposed tenancy and occupancy should be disclosed accurately to the lender and checked with the solicitor, insurer and relevant local authority where necessary.

Prospective landlord and property professional inspecting a rental property

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Repaying the mortgage

Interest-only or repayment?

With an interest-only mortgage, monthly payments normally cover the interest charged but do not reduce the original capital balance. The full balance remains to be repaid at the end of the term. A clear and credible plan is therefore needed for repaying it, which may include selling the property, using investments or refinancing if suitable products remain available at that time.

With a repayment mortgage, each scheduled payment includes interest and part of the capital, so the balance should reduce over the agreed term if all payments are made. Monthly payments are normally higher than on an equivalent interest-only arrangement.

Neither method is automatically right for every landlord. Cash flow, tax advice, the investment timescale, future plans and the risk of relying on a later sale or remortgage should all be considered.

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Running the property

Plan for running costs and landlord responsibilities

The rent is not the same as profit. A realistic budget should allow for periods without a tenant, repairs, maintenance, safety checks, buildings and landlord insurance, letting or management fees, service charges, ground rent where applicable, licences, accountancy, tax and legal costs. It is also sensible to test how the budget would cope if mortgage costs rise or an urgent repair is needed.

Landlords have legal and safety responsibilities, and the detail differs across England, Scotland, Wales and Northern Ireland. Requirements may also vary by property and local authority. Mortgage advice does not replace advice from a solicitor, accountant, letting professional or local authority, but the likely costs and property use should be considered before borrowing is arranged.

Keep a contingency reserve rather than relying on uninterrupted rent. Rental income and property values can fall as well as rise, and there is no guarantee that a property can be sold or refinanced when planned.

Routine safety and maintenance inspection inside a rental property

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Ownership structure

Buying personally or through a limited company

Some landlords buy in their own name and others use a limited company, often a special-purpose vehicle. A company is not automatically the better or cheaper route, and landlords are not uniformly abandoning personal ownership. Mortgage choice, rates, fees, guarantees, administration, how money is taken from the company and the tax consequences can all differ.

The ownership decision should be made before committing to a purchase. Changing the structure later can involve a property transfer, fresh legal work, tax and a new mortgage application. Obtain tailored tax and legal advice from appropriately qualified professionals; Anderson Reed Financial Services can then explore mortgage options that fit the chosen structure.

Scenario 1 • New acquisition

Buying a new property through an SPV company

When a limited company buys a rental property from an unrelated seller on the open market, the company is the purchaser from the outset.

  • Single transaction: The purchase contract and Land Registry title are prepared directly in the company's name.
  • Dedicated SPV mortgage: You apply for a limited company buy-to-let mortgage before exchange of contracts, usually supported by personal guarantees from the directors and shareholders.
  • One purchase-tax event: Property transaction tax is assessed on the company's acquisition under the rules for corporate residential purchases in the relevant UK nation.

Scenario 2 • Existing property transfer (incorporation)

Transferring personally owned property into a company

Moving a rental property you already own personally into a limited company is not a simple ownership-label change. Even if you own all the shares in the company, the law and mortgage lenders treat a transfer from an individual to a company as a sale and purchase at full market value.

  • Fresh mortgage & redemption required: An existing personal buy-to-let mortgage cannot simply be renamed into a limited company. The personal mortgage must be redeemed in full (which can trigger early repayment charges) and a new limited company mortgage underwritten from scratch.
  • Full conveyancing & valuation: Requires a fresh RICS valuation and separate legal representation or dual conveyancing work for the transfer of title and new mortgage charge.
  • Potential property tax & Capital Gains Tax: Because the transfer is treated as a market-value disposal to a connected company, it can trigger property purchase tax for the company (SDLT, LBTT/ADS, or LTT) and personal Capital Gains Tax (CGT) on any gain since you acquired the property.

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Company terminology & underwriting

What is a buy-to-let SPV?

SPV means special-purpose vehicle. In buy-to-let lending, the term commonly describes a limited company established for a restricted property-related purpose rather than a company carrying on a wider trading business. Lenders that accept company applications may look at the company's activities, directors and shareholders, and can require personal guarantees from directors.

An SPV does not create an automatic mortgage or tax advantage, and not every limited company will meet every lender's definition or criteria. The activities recorded for the company, its ownership, previous trading and the proposed property can affect the mortgage options available. A lender may also treat an established trading company differently from a newly formed property SPV.

The decision to buy personally, use an SPV or use another structure should be made with qualified tax and legal advice before contracts are exchanged or money is committed. Anderson Reed Financial Services does not set up companies or advise on their tax or legal suitability, but we can explain how the chosen structure may affect the mortgage search.

What SPV buy-to-let lenders typically check

Criteria vary across the market and are never universal, but lenders considering an SPV application commonly ask for:

  • Companies House registration & SIC codes: Most SPV lenders require a UK private limited company registered with property-specific Standard Industrial Classification (SIC) codes—most commonly 68100 (Buying and selling of own real estate), 68209 (Other letting and operating of own or leased real estate), or 68320 (Management of real estate on a fee or contract basis).
  • Director & shareholder underwriting: Lenders typically underwrite the personal credit history, income, age, and landlord experience of all directors and majority or significant shareholders.
  • Personal guarantees: Even though the borrower is a limited company, lenders normally require directors and shareholders to sign joint and several personal guarantees (often with independent legal advice), meaning your personal assets remain at risk if the company defaults.
  • Deposit source & portfolio schedule: Evidence of how the deposit is injected into the SPV (for example via a director's loan or share capital) and a schedule of any existing personal or company rental properties.

Anderson Reed's role and regulatory limits

We want every landlord to be clear on where our mortgage advice begins and where independent tax and legal advice is required:

  • What we do: We research whole-of-market buy-to-let mortgages for personal borrowers and SPV limited companies, compare total borrowing costs (interest rates, arrangement fees, valuation and legal incentives), check lender rental stress tests and SIC-code rules, and manage the mortgage application.
  • What we do not do: We do not provide tax, accounting, legal, or company-formation advice, and we cannot tell you whether personal ownership or a limited company will leave you better off after tax.
  • Sequence of advice: Always obtain written tax and legal advice from a qualified accountant or tax adviser and a property solicitor before incorporating a company, exchanging contracts, or starting a transfer of personally owned property.

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Buying & transfer costs

Property purchase taxes across the UK

An additional-property tax charge may apply to a buy-to-let purchase, but it is not accurate to describe every buy-to-let purchase as having one universal stamp duty charge. The tax system depends on where the property is located, the purchase price, what the buyer already owns, whether a previous main residence is being replaced and whether the purchaser is an individual or a company.

  • In England and Northern Ireland (administered by HM Revenue & Customs), the relevant tax is Stamp Duty Land Tax and higher rates may apply to additional residential property and to residential purchases by companies.
  • In Scotland (administered by Revenue Scotland), Land and Buildings Transaction Tax applies and an Additional Dwelling Supplement may also be due on additional residential purchases and corporate acquisitions.
  • In Wales (administered by the Welsh Revenue Authority), Land Transaction Tax has separate higher residential rates for additional properties and company buyers.

Transfers into a connected company (market-value rules): Under HM Revenue & Customs, Revenue Scotland, and Welsh Revenue Authority rules, transferring a residential property from your personal name into a limited company with which you are connected is generally assessed on the property's current market value for property transaction tax purposes—even if no money changes hands or the transfer is made in exchange for shares or a director's loan credit. For the individual disposing of the property, HM Revenue & Customs also treats a transfer to a connected company as a disposal at market value for Capital Gains Tax (CGT) purposes unless specific statutory reliefs apply to a qualifying property business.

Ongoing income, corporation tax & future policy changes: Personal landlords and limited companies are taxed under different regimes (Income Tax and finance-cost tax credit rules for individuals versus Corporation Tax and dividend/extraction tax for companies). Any announced future policy changes—such as scheduled adjustments to UK property income tax rates from April 2027—should be verified against current legislation with a qualified tax adviser rather than treated as an automatic reason to incorporate.

Tax rules and rates can change. Our Stamp Duty Calculator is a guide for England and Northern Ireland only; obtain a transaction-specific figure and legal or tax advice before exchanging contracts or making an irreversible decision.

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Existing rental properties

Buy-to-let remortgaging

An existing landlord may remortgage to review a maturing deal, change the mortgage structure, raise funds or move borrowing to a different lender. The new lender will normally reassess the property, rent, loan-to-value and applicant rather than treating the change as automatic.

Before switching, compare the full cost rather than the headline rate alone. Early repayment charges, arrangement fees, valuation and legal costs, a change in monthly payment and the remaining term can affect the outcome. Raising capital increases the debt secured on the property and may reduce the buffer available if its value or rent falls.

If staying with the current lender through a product transfer is available, it can be considered alongside remortgage guidance. You can also use our Mortgage Repayment Calculator to explore repayment examples, but it does not perform a lender's buy-to-let rental assessment.

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Working with Anderson Reed Financial Services

How Anderson Reed Financial Services can help

  1. Understand the plan

    We discuss the property, proposed tenancy, ownership structure, deposit or equity, experience and wider borrowing.

  2. Review the numbers

    We consider the expected rent, lender assessment, purchase and mortgage costs, and the need for a contingency reserve.

  3. Check suitable lender criteria

    We look at the applicant, property and portfolio together rather than relying on a headline rate.

  4. Prepare the application

    We explain the documents required and submit the application with the relevant details disclosed clearly.

  5. Support the case to completion

    We remain available through valuation, underwriting and the legal process, and explain any lender questions that arise.

Contextual landlord enquiry routes

Choose the buy-to-let enquiry route that matches your situation

Select the option below that best describes your plans so our enquiry form is pre-configured for your conversation. You do not need to share sensitive financial details online.

1. Buying a rental property

New buy-to-let purchase (personal or SPV)

For first-time or portfolio landlords purchasing a new rental property either in their personal name or through an SPV limited company.

Enquire about a purchase

2. Existing rental mortgage

Buy-to-let remortgage or refinance

For landlords reviewing a maturing fixed rate, comparing a product transfer against a full remortgage, or refinancing an existing rental property.

Enquire about refinancing

3. Company structure & transfers

SPV or proposed ownership transfer

For landlords who have taken (or are taking) tax advice and want to compare personal versus SPV mortgage costs or understand the financing required to transfer a property into a company.

Enquire about SPV or transfer finance

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Common questions

Frequently asked questions

How much deposit do I need for a buy-to-let mortgage?

There is no single deposit that applies to every buy-to-let mortgage. The available loan-to-value depends on the lender, expected rent, property, ownership structure and applicant. We can check the relevant criteria without presenting one percentage as a market-wide minimum.

Can I get a buy-to-let mortgage as a first-time landlord?

Potentially. Some lenders accept first-time landlords, while others require property ownership or landlord experience. A person who has never owned any property may have fewer options than an existing homeowner, so the exact background matters.

How is buy-to-let affordability assessed?

Lenders commonly compare the expected market rent with a stressed mortgage cost using their own rental coverage calculation. Some also consider personal income, experience and other properties. The calculation and evidence required vary by lender.

Can I live in a property with a buy-to-let mortgage?

A standard buy-to-let mortgage is intended for a property let to tenants, not for the borrower or close family to occupy as their home. If you or a family member may live there, tell the adviser before applying because a different mortgage and regulatory treatment may be required.

Should I choose interest-only or repayment?

Interest-only can reduce the scheduled monthly payment but leaves the original capital to be repaid at the end of the term. Repayment normally costs more each month but reduces the balance over time. The choice should fit the budget, timescale and repayment plan.

Can I buy a rental property through a limited company?

There are buy-to-let mortgages for eligible companies, but the criteria, costs and guarantees can differ from personal borrowing. Buying a new property in a company is also very different from transferring a property you already own personally into a company—a transfer is treated as a market-value sale and purchase requiring fresh mortgage underwriting, conveyancing, and assessment for property purchase tax (SDLT, LBTT/ADS, or LTT) and Capital Gains Tax. A limited company is not automatically more tax-efficient, so obtain tax and legal advice before deciding how to buy or transfer.

What does SPV mean in buy-to-let?

SPV means special-purpose vehicle. It commonly refers to a limited company set up for restricted property-related activities, typically registered at Companies House with real-estate SIC codes such as 68100, 68209, or 68320, with directors providing personal guarantees. Lenders have different definitions and criteria, and an SPV is not automatically the right ownership or tax structure. Obtain qualified tax and legal advice before establishing a company or committing to a purchase.

Can Anderson Reed Financial Services put me in touch with a solicitor or tax adviser?

Anderson Reed Financial Services provides mortgage advice only and does not provide tax, accounting, legal, or company-formation advice. We can explain how a chosen ownership structure may affect the mortgage search. Obtain qualified tax and legal advice before deciding how to buy or committing to a purchase.

Can I remortgage a buy-to-let property to raise money?

It may be possible, subject to the property value, rent, loan-to-value, purpose of the funds and lender criteria. Increasing the mortgage raises the debt secured on the property and should be tested against future costs and periods without rent.

Are buy-to-let mortgages regulated by the FCA?

The regulatory position depends on the circumstances. Some consumer buy-to-let activity falls within a specific framework, while some forms of buy-to-let mortgage are not regulated by the Financial Conduct Authority. Anderson Reed Financial Services will explain which process applies to the proposed case.

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Planning a buy-to-let purchase, remortgage or SPV review?

Talk to a Mortgage and Protection Advisor about the property, rental assessment and borrowing options before you commit.

Discuss a buy-to-let purchase Review a buy-to-let remortgage Discuss SPV or transfer finance

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Editorial provenance & source verification Tax rules & bands

How this financial guidance is written, reviewed and kept accurate

Prepared by Anderson Reed Editorial Team and reviewed by Nigel Kent (CeMAP Qualified Adviser, Mortgage and Protection Adviser). Last substantive review: .

Scope checked: Interest Coverage Ratio (ICR) stress tests, Section 24 finance cost restriction, personal vs SPV limited company ownership, and ONS regional rental context. Scheduled internal accuracy checks do not alter our published review date unless a material update to rules, rates or guidance is approved and published.

Read our editorial & AI policy Flag a mistake or suggest a correction

Primary official sources & regulatory references

Mortgage information

The information given in this website does not contain all of the details you need to choose a mortgage. Make sure that you read the separate key facts illustration before you make a decision. The FCA does not regulate some forms of buy to let mortgages.

It is our intention to provide you with a high level of customer service at all times. If there is an occasion when we do not meet these standards and you wish to register a complaint, please write to: Compliance Department, Connect IFA Ltd, 39 Station Lane, Hornchurch, RM12 6JL or call: 01708 676110. If you cannot settle your complaint with us, you may be entitled to refer it to the Financial Ombudsman Service.

Anderson Reed and Anderson Reed Financial Services are trading names of Anderson Reed Financial Services Ltd, an Appointed Representative of Connect IFA Ltd, which is authorised and regulated by the Financial Conduct Authority (Firm Reference Number 441505) and is entered on the Financial Services Register under firm reference number 947349. Registered in England and Wales under number 13190705. Calls may be recorded for training and monitoring.

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Important information

Your property may be repossessed if you do not keep up repayments on your mortgage.

We charge a fee for mortgage advice, and our standard fee is £695.

Regulatory information

Our regulatory status

Anderson Reed and Anderson Reed Financial Services are trading names of Anderson Reed Financial Services Ltd, an Appointed Representative of Connect IFA Ltd, which is authorised and regulated by the Financial Conduct Authority (Firm Reference Number 441505) and is entered on the Financial Services Register under reference 947349. The guidance and/or information contained within this website is subject to the UK regulatory regime and is therefore targeted at consumers based in the UK.

Fees and commission

We charge a fee for mortgage advice, and our standard fee is £695.

Commission disclosure: We are a credit broker and not a lender. We have access to an extensive range of lenders. Once we have assessed your needs, we will recommend a lender or lenders that provide suitable products to meet your personal circumstances and requirements, though you are not obliged to take our advice or recommendation. Whichever lender we introduce you to, we will typically receive commission from them after completion of the transaction. The amount of commission we receive will normally be a fixed percentage of the amount you borrow from the lender. Commission paid to us may vary in amount depending on the lender and product. The lenders we work with pay commission at different rates. However, the amount of commission that we receive from a lender does not have an effect on the amount that you pay to that lender under your credit agreement.

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