What is a Buy to Let mortgage?

Who is this page for?

If you’re thinking about a Buy to Let mortgage or want to know more about renting out properties as a landlord, you can find some useful information here. 

What is a Buy to Let mortgage?

A Buy to Let mortgage is a loan you can take out to buy an investment property that you or your family will not live in, and that you intend to rent out to tenants. 

How does a Buy to Let mortgage work?

Unlike a residential mortgage, a Buy to Let mortgage is usually taken out as an interest-only loan. This means your monthly repayments cover any loan interest that’s accumulated, but not the original loan amount.

You’ll need to pay back any money you’ve borrowed at the end of the agreement. There are lots of ways to do this including selling the property, using savings or agreeing new mortgage terms.

People often use the money made from the rent they charge to cover the monthly mortgage repayments. As rental income isn’t always guaranteed – sometimes a tenant may be late in paying their rent or the property may be empty – this can be seen as a risk.

This added risk can make Buy to Let mortgages more expensive than residential mortgages. It can also mean you might need a higher deposit and pay higher interest rates. 

How much can you borrow?

As well as your own financial circumstances, rental yields can also impact how much you can borrow for Buy to Let properties.

Rental yield is the return a Buy to Let landlord could make on a property. It’s worked out by taking the total rent payments for a year and dividing it by the property value, then multiplying this figure by 100. 


1,200 x 12 = 14,400

14,400 / 200,000

X 100

= 7.2%


You may be required to have more of a deposit for Buy to Let properties – often 40% of the full property value. Typically, you’ll require a deposit of at least 20-25% of the property’s sale price.

Like residential mortgages, your eligibility can depend on several factors, including:

  • Initial deposit
  • Current salary
  • Credit history
  • Existing debts
  • Rental yield

Remember, you’ll have to pay Stamp Duty on any property you won’t be living in that’s worth more than £40,000 – so make sure you consider this when borrowing for a Buy to Let property. This is called Land and Buildings Transaction Tax in Scotland and Land Transaction Tax in Wales and different Buy to Let rates apply. 

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What do you need for a Buy to Let mortgage?

When you’re ready to apply for a Buy to Let mortgage, you’ll need a range of documents as well as the deposit for the property. Documents often required include: 

  • Utility bills.
  • P60 form.
  • Payslips for the last three months, or proof of income and tax returns if self-employed.
  • Proof of existing mortgage statement.
  • Proof of additional income.
  • Bank statements on all current accounts for the last three to six months.
  • Proof of outgoings.
  • Proof of identity (passport or driving licence).
  • Details of the property you are looking to buy.

Can you get a Buy to Let mortgage?

Lots of factors are considered when assessing a Buy to Let mortgage application:

  • Rental yield – Typically, this should be enough to cover your monthly repayments, plus any profit you wish to make.
  • Age – Your age could affect whether you are eligible for a Buy to Let mortgage.
  • Credit history – This will include a record of your borrowing and whether you've kept up with other repayments, such as credit cards and phone bills.
  • Current income – Some lenders have a minimum annual salary that applicants must meet.
  • Current lending commitments – Your current financial situation will also be considered, including mortgage payments on your own home and any other monthly outgoings.

How long does a Buy to Let mortgage take?

Most applications take just a few hours to complete and take between two to three months to process.

You may be able to help speed the application up by ensuring you have all the necessary documents and by keeping in touch.   

Cost associated with Buy to Let properties

There are several costs that come with managing a rental property, and you should consider these when deciding on a Buy to Let mortgage. 

  • Monthly repayments – even if the property isn’t rented out.
  • Repairs and maintenance.
  • General upkeep of the property such as redecorating, cleaning and gardening.
  • Mortgage interest and rental income tax.
  • Rental agency fees.
  • Annual safety checks on boilers and electrics.
  • Landlord insurance.
  • Rent guarantee insurance.

Buy to Let property benefits

There can be a number of benefits to having a Buy to Let property:

  • The rental market can be a long-term investment, although property prices can change.
  • If your rental income covers your monthly mortgage repayments and running costs, you may have profit left at the end of the month.
  • You can offset upkeep and repair costs against your yearly tax bill.

Things to consider with a Buy to Let mortgage

Having a Buy to Let mortgage also comes with risks – consider the following before making your application:

  • You’ll need a larger deposit when applying.
  • Fees and interest rates are usually higher.
  • You may need Landlord and Buildings insurance to cover your property in case of damage.
  • You’ll pay an extra 3% in addition to the standard stamp duty rates for any property that isn’t your primary residence. There are similar additional rates of Land and Buildings Transaction Tax in Scotland and Land Transaction Tax in Wales.
  • You’ll pay income tax on any rental income on top of your monthly mortgage payments.
  • If you sell your Buy to Let property for more than the original price, you may be liable to pay Capital Gains Tax.
  • House prices can go up and down – this can mean you end up with negative equity. Negative equity is when you owe more on your mortgage than the property is worth. 

What is a Regulated Buy to Let property mortgage?

A Regulated Buy to Let mortgage – also called a Consumer Buy to Let mortgage – is for landlords who want to rent out a house they didn’t buy specifically to let. This usually occurs when:

  • You previously lived in the property and moved out.
  • The property was inherited.

Regulated Buy to Let mortgages are not available to people who already have a Buy to Let property.

The content on this page is for reference and does not constitute finance advice.

For impartial financial advice, we recommend government bodies like the MoneyHelper.

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