Find the right buy to let mortgage for your investment

How do I get a buy to let mortgage?

Getting a buy to let mortgage involves a few more steps than a standard residential mortgage, but the process is straightforward when you know what lenders are looking for. Here is how to move from initial research to completing your purchase.

1. Step 1: Check your eligibility. Most buy to let lenders require you to be at least 21 years old, earn a minimum personal income of around 25,000 pounds per year, and already own a residential property. Some specialist lenders will consider first-time buyers and those with lower incomes, so do not rule yourself out without checking with an advisor first.
2. Step 2: Save for a larger deposit. Buy to let mortgages typically require a minimum deposit of 25% of the property value, compared with 5-10% for residential mortgages. Putting down 40% or more will give you access to significantly better interest rates, which can save you thousands of pounds over the term of your mortgage.
3. Step 3: Research your target rental market. Lenders want to see that the expected rental income will cover at least 125% of the mortgage payments at a stress-tested interest rate, typically around 5.5%. Use local rental data from Rightmove or Zoopla to estimate realistic rents for comparable properties in your chosen area before committing to a purchase.
4. Step 4: Speak to a specialist mortgage advisor. Many of the best buy to let mortgage deals are only available through intermediaries, not directly from lenders. A specialist advisor can search across 90+ lenders to find the right deal for your circumstances and handle the full application process on your behalf.
5. Step 5: Apply and complete. Your advisor submits your application to the chosen lender, who will arrange a property valuation. Once the mortgage is approved, your solicitor handles the legal conveyancing work. The process from application to completion typically takes 4 to 8 weeks, depending on the complexity of the transaction.

What kind of buy to let mortgage do I need?

The right buy to let mortgage depends on your situation, the type of property you are buying, and how you plan to structure your investment. Here are the most common scenarios and what to consider for each one.

Buying your first investment property

If you are a first-time landlord, you will need a standard buy to let mortgage. Most lenders prefer you to already own your own home, though some specialist lenders will work with first-time buyers entering the rental market. Expect to need a deposit of at least 25% and proof that the rental income will comfortably cover your mortgage payments. Your advisor can identify lenders that actively welcome first-time landlord applications.

Remortgaging an existing buy to let

If your current fixed rate is coming to an end or you want to release equity from your property, remortgaging your buy to let can help you secure a better rate or access funds for further investment. Start the process around six months before your current deal expires to give yourself the widest choice of products. Moving to your lender's standard variable rate, even for a few months, can cost hundreds of pounds in unnecessary interest payments.

Buying through a limited company

Since the Section 24 tax changes restricted mortgage interest relief for individual landlords in April 2020, many investors now purchase through a limited company structure. This can offer significant tax advantages, particularly for higher-rate taxpayers who would otherwise face a substantial reduction in their returns. Rates on limited company mortgages tend to be slightly higher than personal buy to let products, so it is important to calculate the net benefit for your specific tax position.

Letting to multiple tenants (HMO)

If you plan to let a property to three or more unrelated tenants who share facilities, you will need an HMO mortgage. These are specialist products with additional requirements, including mandatory licensing in many local authority areas. However, HMOs can generate significantly higher rental yields than standard single-let properties, often 8-12% gross compared with 4-6% for a standard let.

Holiday letting

Short-term holiday let mortgages are designed for properties you plan to let as holiday accommodation rather than on a standard assured shorthold tenancy. Lender criteria differ from standard buy to let, and you will typically need to demonstrate projected occupancy rates and seasonal rental income. Holiday lets can qualify for favourable tax treatment, including capital allowances on furnishings.

Building a property portfolio

If you already own four or more mortgaged rental properties, most lenders will classify you as a portfolio landlord. This triggers more detailed underwriting, including a full assessment of your entire portfolio's performance and cash flow. Some lenders specialise in portfolio lending and can offer more streamlined processes for experienced landlords who meet their criteria.

What types of buy to let mortgage are there?

Buy to let mortgages come in several forms, each suited to different investment strategies and risk appetites. Understanding the key differences will help you choose the right product for your circumstances and goals.

What fees and costs might I have to pay?

Buy to let mortgages come with several upfront and ongoing costs beyond the deposit. Understanding these fees in advance will help you budget accurately and avoid any surprises during the purchase process.

How much can I borrow for a buy to let mortgage?

Buy to let mortgage lending works differently from residential mortgages. Instead of basing the amount primarily on your salary, lenders focus heavily on the rental income the property will generate. Here are the key factors that determine your maximum borrowing.

• Rental income coverage. Most lenders require the expected monthly rent to cover between 125% and 145% of the mortgage payment at a stress-tested interest rate, typically around 5.5%. If the stressed monthly payment would be 1,000 pounds, you would need to demonstrate rental income of at least 1,250 to 1,450 pounds per month.
• Deposit size. The minimum deposit is usually 25%, meaning you can borrow up to 75% of the property value (75% loan-to-value). Some specialist lenders offer up to 80-85% LTV, but interest rates are significantly higher at these levels and fewer lenders are available.
• Your personal income. Most lenders set a minimum personal income requirement, commonly 25,000 pounds per year. This is separate from rental income and acts as a safety net for periods when the property may be unoccupied between tenants.
• Your tax status. Higher-rate and additional-rate taxpayers face stricter rental coverage requirements from most lenders, often 145% rather than 125%. This is because the Section 24 tax changes reduced the mortgage interest relief available to individual landlords in higher tax bands.
• Property type and condition. Standard properties in good condition attract the widest range of lenders and the highest LTV ratios. Non-standard construction, properties above commercial premises, or those needing significant renovation work may have lower borrowing limits and fewer lending options.
• Existing portfolio size. If you already own multiple buy to let properties, lenders will assess the performance of your entire portfolio before approving additional borrowing. A strong track record of rental income and low void periods can work in your favour, while underperforming properties may limit what you can borrow.

How can I get a better buy to let mortgage deal?

Small decisions during the mortgage process can add up to significant savings over the life of your investment. These practical tips will help you secure a more competitive deal and keep your ongoing costs under control.

1. Tip: Compare the total cost, not just the interest rate. A lower interest rate with a high arrangement fee can cost more overall than a slightly higher rate with no fee. Calculate the total cost over the entire fixed period, including all fees and charges, to compare deals accurately. For example, on a 200,000 pound mortgage over a 5-year fix, an arrangement fee of 2,000 pounds is equivalent to roughly 0.2% added to the annual interest rate.
2. Tip: Put down a larger deposit if you can afford to. The difference in rates between 75% LTV and 60% LTV can be substantial, often 0.3-0.5% or more. On a 150,000 pound interest-only mortgage, that difference could save you 450 to 750 pounds per year in interest payments. If you have the funds available, a larger deposit is one of the most effective ways to reduce your ongoing costs and improve profitability.
3. Tip: Time your remortgage carefully. Start looking for a new deal around six months before your current fixed rate expires. Most lenders allow you to lock in a rate this far in advance, giving you time to compare products without the pressure of your existing deal ending. Moving to the lender's standard variable rate, even for a few months, can cost hundreds of pounds in unnecessary interest.
4. Tip: Consider the right ownership structure from the start. Transferring a property from personal ownership to a limited company after purchase triggers a stamp duty charge and potential capital gains tax liability. If you think a limited company structure might suit your tax position, set it up before you buy rather than trying to convert later when the costs can be prohibitive.
5. Tip: Use a specialist buy to let mortgage advisor. Many competitive buy to let products are only available through intermediaries, not directly from lenders. A specialist advisor has access to these exclusive deals and understands the nuances of buy to let underwriting criteria, which can make the difference between approval and rejection when your circumstances are not entirely straightforward.

How does a buy to let mortgage work?

A buy to let mortgage is a loan specifically designed for purchasing a property you intend to rent out to tenants rather than live in yourself. While the basic concept is similar to a residential mortgage, there are several important differences in how these products are structured, assessed, and managed.

Lending criteria focus on rental income.

Unlike residential mortgages, which are primarily based on your salary and outgoings, buy to let lending is driven by the expected rental income from the property. Lenders want to see that the rent will comfortably cover the mortgage payments with a safety margin, typically 125-145% of the monthly payment calculated at a stressed interest rate of around 5.5%. Your personal income is still checked, but it plays a secondary role in the assessment.

Most landlords choose interest-only.

The majority of buy to let mortgages are taken on an interest-only basis. This means your monthly payments cover only the interest charges, and the original loan amount stays the same throughout the term. At the end of the mortgage term, typically 25 to 30 years, you repay the full loan, usually by selling the property or refinancing. This approach keeps monthly costs lower and maximises your rental cash flow during the investment period.

Deposits are larger than residential mortgages.

While you can get a residential mortgage with as little as 5% deposit, buy to let products typically require at least 25%. This higher deposit requirement reflects the additional risk lenders associate with investment properties, including the possibility of void periods and fluctuating rental markets. A deposit of 40% or more will significantly improve the interest rates available to you.

Rates are typically higher than residential products.

Buy to let mortgage rates are generally 0.5-1% higher than equivalent residential rates. This premium reflects the higher risk profile of investment lending, including the possibility of empty periods between tenants and the costs of property maintenance. However, rates remain competitive across the market, and the gap between residential and buy to let rates has narrowed in recent years as lender competition has increased.

You have ongoing responsibilities as a landlord.

Owning a buy to let property comes with legal and financial obligations beyond the mortgage itself. You must maintain the property to a habitable standard, comply with safety regulations including annual gas safety certificates and five-yearly electrical installation checks, protect tenant deposits in a government-approved scheme, and declare your rental income to HMRC through self-assessment. Many landlords use a letting agent to manage these responsibilities, typically charging 8-15% of the monthly rent for a full management service.