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A buy-to-let mortgage can provide the finance you need to buy a property to rent out. Just click on the button above, answer a few quick questions and compare buy-to-let mortgage rates and features that are matched to you.

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Last updated on 17 August 2022.

What is a buy-to-let mortgage?

A buy-to-let mortgage is a mortgage arranged on a property, which you want to rent out as a landlord rather than live in yourself. For this reason, you may also see buy-to-let mortgages referred to as landlord mortgages, while they are commonly abbreviated to BTL mortgages too.

Importantly, a buy-to-let mortgage shouldn’t be confused with a let-to-buy mortgage, which allows you to rent out the property, with the lenders permission, where you currently live and buy yourself a new home.

How to get the best buy-to-let mortgage for you

Many of the big banks and building societies offer buy-to-let mortgages alongside their traditional mortgages, while there are plenty of specialist buy-to-let mortgage lenders too.

Our buy-to-let mortgage comparison tool is an easy way to find the buy-to-let mortgage to suit your needs. Share a few basic details such as the property value, the mortgage amount you want to borrow and your prefered term, and buy-to-let mortgages that are suitable for you will appear.

To help you decide, there is an estimate of how much your monthly repayments would be for each mortgage, and important information such as the interest rates, APRCs, and product fees involved.

» COMPARE: Buy to let mortgages

If you are not sure whether buy to let is a good fit for you, or want help finding a suitable buy-to-let mortgage, approaching a mortgage adviser is a sensible choice.

How do buy to let mortgages work?

A buy-to-let mortgage shares many characteristics of a standard residential mortgage in that you’ll need to pass the lender's affordability assessment, pass a credit score and have a deposit. Then you’ll make regular repayments to your mortgage lender.

However, there are some important differences too, including higher minimum buy-to-let mortgage deposit requirements than on normal mortgages, and usually higher fees and mortgage rates.

Perhaps most notably, you’ll find that most BTL mortgages are offered on an interest-only basis, where your monthly payments go solely towards meeting the interest on your mortgage. The original loan amount you borrowed must then be paid off in its entirety at the end of your mortgage term. Rental income received from tenants will need to cover repayments each month, and you might then either sell the rental property or take out another mortgage to make the capital repayment, if you don’t have the funds required to pay back the loan outright at the end of the mortgage term.

Buy-to-let mortgage rates explained

As with a standard mortgage, the buy-to-let mortgage rate that you pay will be determined by a combination of factors, including the size of your mortgage, the amount of deposit you have, and the type of buy-to-let mortgage product you choose. How much you expect to receive in rental income will be important too, as this will affect the amount you can borrow.

But even if you’re able to secure the lowest buy-to-let mortgage interest rates, generally these will prove to be higher than for an equivalent mortgage on a residential property you intend to live in. This is mainly due to the additional risk that buy-to-let lenders attach to landlords not being able to keep up with repayments if tenants fall behind on their rent or the property is unoccupied for an extended period of time.

The same reasoning also helps to explain the usually higher fees on buy-to-let mortgages, and the tendency towards lenders often requiring larger deposits than on residential mortgages. As a result, it follows that the more substantial the deposit you can put down, the lower the interest rate you may be offered.

Other things to consider when taking out a BTL mortgage

A number of other important factors should always be considered in relation to a buy-to-let mortgage.

Stamp duty

Not only are you liable for stamp duty when purchasing a buy-to-let property, you must pay an additional 3% on top of the usual banded rates too.

» MORE: Learn about stamp duty


The rent you get from tenants is liable for income tax at the relevant band. However, certain expenses can be deducted, including fees paid to letting agents, the cost of general repairs and maintenance, insurance, utility bills and council tax, if you pay them as the landlord. Previously, it had been possible to deduct certain finance costs too, including mortgage interest payments. However, recent rule changes mean these expenses now qualify landlords for a 20% tax credit instead.

Capital gains tax is also payable if you sell the property and record a profit.

Other costs of being a landlord

Before committing to a buy-to-let mortgage, you should also consider some of the other expenses, which are usually involved with becoming and then being a landlord. These might include:

» MORE: Learn about how to rent out a house

Can I get a buy-to-let mortgage?

To qualify for a buy-to-let mortgage, you will usually need to show that:

  • You own your own home, either outright or with an existing mortgage.
  • Your credit score is good and that you are comfortably meeting any debt or loan obligations that you may already have.
  • Your annual income is above £25,000 – anything below this, and you could find it difficult to meet the criteria set by buy-to-let lenders. However, some lenders won’t have a minimum income level needed.
  • You’re not too old – upper age limits set by lenders mean the term of any buy-to-let mortgage must usually end before you reach the age of either 70 or 75. Some do go up to the age of 80 but are less common.
  • You're not too young – most lenders expect borrowers to be 21 years old, rather than age 18 for standard mortgages.
  • Your financial situation is such that you can take on the risks associated with owning a buy-to-let property such as having no tenants and therefore no rental income.

Buy-to-let mortgage deposit: how much do I need?

Whereas residential mortgages are available with a deposit of just 5% the typical buy-to-let mortgage deposit required is normally 25% of the property value.

Some lenders might allow a 20% deposit, in which case you’re looking at an 80% loan-to-value buy-to-let mortgage. However, the bigger the deposit you can put down, the lower the buy-to-let mortgage rates you’re likely to be offered.

How much can I borrow with a buy-to-let mortgage?

The size of your deposit and your financial situation will both play a part in determining how much a buy-to-let mortgage lender is willing to let you borrow. However, what is usually most important are your anticipated earnings from rental income, as lenders assess this against what you will need to cover your mortgage repayments.

Generally, buy-to-let lenders want your expected rental income to be at least 25% higher than the monthly repayment on your mortgage, although some may look to as high as 45%.

To gauge how much rent you can reasonably expect to charge, and so to get an idea of whether buy to let is viable for you, you could look online or contact letting agents to find out the current rents being asked for rental properties in your area.

How to apply for a buy-to-let mortgage

Similar to applying for a standard mortgage, a buy-to-let mortgage lender will want to see proof of your identity and address, evidence of your earnings from employment and other income, and details of any outstanding loans and debt that you have to your name. They will also fully examine your outgoings and the affordability of the loan.

As a minimum, you’ll usually need:

  • either your driving licence or passport
  • a utility bill dated within the last three months
  • three to six months’ worth of payslips and bank statements, your P60, or if you are self-employed usually a minimum of two years’ accounts
  • credit card and loan statements
  • paperwork showing details of any existing mortgage
  • evidence showing your potential rental income.

The process of applying for a buy-to-let mortgage may differ slightly between lenders, but generally the path is as follows:

  • Get an Agreement in Principle (AIP). This can be done before you’ve found a property and will give you an indication of what you might be able to borrow. Most estate agents like to see an AIP as proof you’re serious about buying.
  • Apply for a mortgage. Find the property you like and have an offer accepted, and you should be ready to begin your mortgage application.
  • Arrange the legal side. A solicitor or conveyancer can guide you through the legalities of buying a property, and ensure all the relevant searches and surveys have been completed, the contracts are signed correctly, and the money is where it needs to be.

Types of buy-to-let mortgages

The various types of buy-to-let mortgage provide different ways for you to structure your loan and payments to best suit you.

  • Fixed rate mortgage – by guaranteeing that your monthly repayments will remain unchanged for the fixed term chosen, a fixed-rate mortgage can give you certainty your repayments are set for a period of time. On the flipside, you may miss out on lower repayments if interest rates fall and most will want to search for a new deal when the fixed term expires and you’ll revert to your lender’s standard variable rate (SVR), which is usually a higher interest rate in comparison.

  • Variable rate mortgage - a variable rate mortgage, on which your rate can change over time, can work in your favour if interest rates fall, but will see your payments increase if rates start to rise. Variable rates tend to be set lower than fixed rates when comparing your mortgage options, but going forward the risk of a rate rise always needs to be taken into account.

  • Tracker mortgage - one subtype of variable rate mortgage is a tracker mortgage, which sees the rate you pay follow the path of the Bank of England base rate. The rate is usually set slightly higher or lower than the base rate, but will move up or down when it must. You can take out a tracker mortgage for a set amount of time (after which it will revert to the lender’s SVR) or for the full duration of a mortgage. Some tracker mortgages have what's called a cap or a collar. These mean the rate cannot go below or above a certain interest rate.

  • Discounted variable rate mortgage - this variable rate mortgage offers a discount on a lender’s SVR for a set amount of time. Once this expires, the actual SVR becomes payable.

  • Buy-to-let remortgages – switching to a new buy-to-let mortgage deal is known as remortgaging. You should start thinking about a buy-to-let remortgage up to six months before your current deal ends if you don’t want to be automatically transferred onto your existing lender’s SVR. If buy-to-let remortgage rates are much lower than the interest rate you are on currently, remortgaging before your current deal expires could be a viable option. However, you’ll need to factor into your calculations any early repayment charges on your current deal and the costs associated with taking out a new mortgage. Fixed and variable rate buy-to-let remortgage options are both usually available.

Advantages and disadvantages of a buy-to-let mortgage

A buy-to-let mortgage is a great way to realise your property investment aspirations, but there are plenty of things to consider too.

Advantages of buy-to-let mortgages

  • If you want to invest in property but can't afford to buy outright, then a buy-to-let mortgage is usually your only option.
  • There are no guarantees, but rental properties can grow in value and have the potential to deliver a profit when it’s time to sell.
  • Your tenants are effectively paying your buy-to-let mortgage for you, and if the rent is higher than your repayments, you’ll have an additional income stream too.
  • Some of the expenses involved with being a landlord can be offset against income tax, including letting agency fees, council tax, and maintenance costs. A 20% tax credit relating to the interest on your BTL mortgage is available as well.

Disadvantages of buy-to-let mortgages

  • You’ll usually need a deposit of at least 25% of the property value to take out a buy-to-let mortgage.
  • Property prices can fall as well as rise, so your investment comes with a risk that you may not make a profit and could lose money.
  • If the buy-to-let mortgage you take out is interest-only, you’ll need a plan for paying the capital element of this back at the end of your mortgage term. In particular, remember that if the value of your property falls, and you’re hoping to sell it to pay back what you owe, there will be a shortfall that must be covered.
  • If you have no tenants in situ and no rental income coming in, your mortgage repayments will still need to be made.
  • The various costs of stamp duty, insurance, fees and tax can quickly add up. Paying for (and arranging) property repairs and maintenance is your responsibility too.
  • Unless you pay a letting agency, getting tenants, asking for and checking their references, and sorting the necessary paperwork is down to you.
  • Any profit made from selling your BTL could be subject to capital gains tax.

Buy to Let Mortgages FAQs

How many buy-to-let mortgages can I have?

There is no formal limit on how many buy-to-let mortgages anyone can have, so it is ultimately down to individual mortgage lenders to decide if they are willing to grant you more. Having the necessary deposit and the evidence that your mortgage repayments will be taken care of by expected rental income is key to getting any additional mortgage.

Can I change my mortgage to a buy-to-let mortgage?

It should be possible to change a residential mortgage to a buy-to-let mortgage, either by asking your current mortgage lender about swapping from one to the other, or by remortgaging to a buy-to-let mortgage from a new lender. However, if you only intend to rent your home out for a short period of time, perhaps of between six and 12 months, you could ask your lender about obtaining consent to let, where you retain your residential mortgage but are allowed to move tenants in temporarily.

Are buy-to-let mortgages interest-only?

While the majority of buy-to-let mortgages are interest-only, some repayment mortgage options are available too.

Can I afford a buy-to-let mortgage?

You’ll usually need at least a 25% deposit to get a buy-to-let mortgage, and there are various costs to pay related to a mortgage. Typically, you’ll need an annual income of at least £25,000 to qualify too.

Is it easy to get a buy-to-let mortgage?

Along with the general criteria all mortgage lenders require, including having a good credit score and being within the lender’s age limits, you'll typically need a minimum 25% deposit to take out a buy-to-let mortgage. A number of lenders will also require you to own your own home, or be in the process of buying one with a residential mortgage.

Are buy-to-let mortgages more expensive than ‘normal’ mortgages?

Buy-to-let mortgages tend to have higher interest rates than residential mortgages. Higher tax charges can also apply to rental properties, including higher Stamp Duty charges than those on residential homes. You should also consider what you will do if you struggle to rent out the property or have a long period with no tenants, and factor in the costs involved with running a property, including letting agent costs, maintenance costs, etc.

Can you get a buy-to-let mortgage as a first-time buyer?

While most lenders would want you to have your own home before taking out a buy-to-let mortgage, it is possible to get a buy-to-let mortgage as a first-time buyer. Your choice of products is likely to be reduced, however, and you may be deemed a higher risk and have to find a bigger deposit as a result.

Can I rent out a room and still have a residential mortgage?

It is always best to check with your mortgage lender if lodgers are allowed under the terms of your residential mortgage, but most are unlikely to object.

Can you switch from a buy-to-let to a residential mortgage?

This should be possible, but you’ll need to meet your lender’s requirements for a residential mortgage for it to happen. If your BTL lender is reluctant to let you switch, or doesn’t offer residential mortgages, then you may still be able to remortgage to a new lender.

Can you claim back interest on buy-to-let mortgages?

The rules recently changed so that landlords now get a 20% tax credit in relation to buy-to-let mortgage interest payments. Previously, such interest payments had been tax deductible.

How long does a buy-to-let mortgage take?

This will vary between lenders but will take weeks rather than days. Try to avoid any unnecessary delays by getting all of your paperwork and required documentation ready in advance, including evidence of the rental income you expect to achieve.

Why might a buy-to-let mortgage application be declined?

There are a number of reasons why you may be rejected for a buy-to-let mortgage, including falling short of income requirements, your deposit is too small, or because you’ll be outside a lender’s upper age limits when your proposed mortgage term ends. Also, expect to be turned away if your anticipated rental income doesn’t cover at least 125% of the mortgage repayments.

Can I claim tax relief on a BTL mortgage?

Tax relief specific to buy-to-let mortgages has recently changed so that mortgage interest payments are no longer tax deductible, but qualify landlords for a 20% tax credit instead.

What is a rental coverage requirement?

A rental coverage requirement is the minimum amount of rent you have to be able to achieve each month to obtain a mortgage. It is set as a percentage of the monthly mortgage repayments. Each lender will have its own rental coverage requirements but typically it will be between 125% and 145%. So at the higher number, you’ll have to be able to secure up to 45% more than your monthly mortgage repayment in rent to get the loan.

What is a rental yield?

Rental yield can give landlords an indication as to whether a buy-to-let property is a worthwhile investment.

Essentially, it’s the rental income that you receive in a year from a property expressed as a percentage of the value of that property. So if you receive an annual rental income of £10,000 and the property is worth £200,000, the rental yield is 5% – calculated by dividing £10,000 by £200,000, and then multiplying by 100 to find the percentage.

» MORE: Explore our buy-to-let mortgage calculators

Can I remortgage a buy-to-let property?

Yes, it is possible to remortgage a buy-to-let property. Often landlords remortgage in order to raise the deposit that they need to buy another buy-to-let property.

» COMPARE: Buy-to-let remortgages

Why use the NerdWallet buy-to-let comparison tool?

Quite simply, it will save you time in the search for a buy-to-let mortgage that’s right for you. Once you’ve answered a few quick questions, our comparison tool will only show you the mortgages that are relevant to you.

NerdWallet has selected Koodoo to provide you with this information-only online comparison service on a non-advised basis. NerdWallet will receive a share of the commission that Koodoo earns from the lender or from our partnered broker, Fluent Mortgages.

Koodoo is the trading name of Mortgage Power Limited, which is authorised and regulated by the Financial Conduct Authority (FRN 845978), and is a registered company in England and Wales (company registration number 10978680), with a registered address at Scale Space, 58 Wood Lane, London, W12 7RZ

Fluent Mortgages Ltd is authorised and regulated by the Financial Conduct Authority (FRN 458914), and is a registered company in England and Wales (company registration number 10978680), with a registered address at 102 Rivington House, Chorley, New Road, Horwich, Bolton, BL6 5UE

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