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Buy-to-Let Repayment Mortgages.

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Author: Davi Thakar
Last Reviewed on: June 12, 2025

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Buy-to-Let Repayment Mortgages

A buy-to-let repayment mortgage can be an attractive option for landlords who wish to secure long-term investment gains and build equity in a rental property. Although many landlords opt for interest-only buy-to-let mortgages, repayment options are gaining interest for their stability and equity-building potential. In this article, we’ll explore what a buy-to-let repayment mortgage is, the benefits and drawbacks, eligibility requirements, and how to switch from an interest-only to a repayment mortgage.

What is a Buy-to-Let Repayment Mortgage?

A buy-to-let repayment mortgage is a type of mortgage where landlords repay both the loan’s principal amount and the interest over a set term, usually 25 years. Unlike interest-only mortgages, where only the interest is paid each month and the original loan amount remains, a repayment mortgage ensures that by the end of the term, the entire loan balance is paid off, leaving the landlord with full ownership of the property.

Why Would Landlords Want a Repayment Mortgage?

Landlords might choose a repayment mortgage as it allows them to build equity in the property over time while reducing the loan balance. This can be especially attractive for those looking at buy-to-let properties as a long-term investment, or who want to avoid the balloon payment at the end of an interest-only mortgage.

The certainty that, at the end of the mortgage term, they will own the property outright can be appealing, particularly if they plan to pass the property on as an inheritance, sell it to fund retirement, or even use it as a personal residence in the future.

Benefits of Buy-to-Let Repayment Mortgages

There are several advantages to choosing a buy-to-let repayment mortgage for landlords:

Builds Equity: Each monthly payment reduces the mortgage balance, building equity that can benefit landlords through capital growth, especially in a rising property market.

Financial Security: With the principal paid off over time, landlords have full ownership of the property by the end of the term, providing a more secure investment that doesn’t rely on refinancing or selling to clear the debt.

Reduced Risk: Unlike an interest-only mortgage, which requires a plan for repaying the principal, repayment mortgages steadily reduce the amount owed, minimising the risk of having a significant balance at the end.

Flexibility with Future Borrowing: The gradual reduction in the mortgage balance may make it easier to refinance or take out additional borrowing as the loan-to-value ratio (LTV) improves over time.

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Drawbacks of Buy-to-Let Repayment Mortgages

Although a buy-to-let repayment mortgage has notable benefits, there are some drawbacks to consider:

Higher Monthly Payments: Because each payment covers both interest and principal, the monthly costs are significantly higher than with an interest-only mortgage. This can impact cash flow, especially for landlords with multiple properties or those reliant on rental income.

Lower Short-Term Profits: Higher monthly costs mean landlords receive less profit in the short term, which can affect the attractiveness of this mortgage type, especially for landlords looking to maximise rental yield.

Limited Tax Deductions: The interest portion of a repayment mortgage is tax-deductible, but repayments are not, potentially limiting tax benefits compared to interest-only options.

Why is an Interest-Only Mortgage More Popular for Buy-to-Let?

An interest-only buy-to-let mortgage is popular among landlords for a few key reasons:

Lower Monthly Payments: Since only the interest is paid monthly, payments are generally lower, allowing landlords to maximise their cash flow and improve rental income yields.

Tax Efficiency: Interest payments are tax-deductible for landlords, which can make this type of mortgage more tax-efficient, depending on individual circumstances and tax status.

Flexibility in Investment: Lower monthly payments allow landlords to allocate more funds toward acquiring additional properties or reinvesting in other opportunities, which can accelerate portfolio growth.

Option to Sell or Refinance: Many landlords view interest-only buy-to-let properties as short- to medium-term investments. They may plan to sell the property, hoping it appreciates in value to cover the loan, or to refinance at the end of the mortgage term.

    Am I Eligible for a Buy-to-Let Repayment Mortgage?

    Eligibility for a buy-to-let repayment mortgage will depend on several factors, including:

    Credit History: Lenders assess credit scores to gauge risk. A strong credit score can improve your eligibility and may even help secure a lower interest rate.

    Income Requirements: Most lenders require a minimum income of at least £25,000 (though this can vary) and will evaluate your ability to afford the higher monthly repayments.

    Rental Yield: Lenders look for rental yield to cover 125%-145% of mortgage repayments to ensure the rental income is sufficient to cover the mortgage, even with fluctuating rental markets or void periods.

    Deposit: Higher deposits can improve your chances of approval, as lenders prefer an LTV of 75% or lower for buy-to-let mortgages. However, having a higher deposit may also improve your interest rates and options.

    Age Limits: Buy-to-let mortgage providers often have age limits, as they expect the loan to be paid off before retirement age. Some lenders do offer buy-to-let repayment mortgages to older borrowers, but it’s always worth checking age restrictions.

    Switching from an Interest-Only to a Repayment Buy-to-Let Mortgage

    If you currently have an interest-only buy-to-let mortgage and are considering switching to a repayment mortgage, there are a few key points to consider:

    • Review Your Financial Goals: Consider whether paying down the loan over time aligns with your investment strategy. A repayment mortgage can offer security but might reduce short-term profits.

    • Consider a Partial Switch: Some lenders offer partial interest-only mortgages, where part of the loan is repaid monthly. This may suit landlords who want to pay off some of the loan without the full cost of a repayment mortgage.

    • Assess Your Cash Flow: Before switching, ensure your rental income comfortably covers the new repayment amount. If you are unsure, a mortgage advisor or broker specialising in buy-to-let properties can help you evaluate affordability.

    Which Lenders Offer Buy-to-Let Repayment Mortgages?

     

    A variety of UK lenders offer buy-to-let repayment mortgages. Here are some high street and specialist lenders that provide options for landlords interested in a repayment structure:

    NatWest: NatWest offers a variety of buy-to-let options, including both interest-only and repayment options, catering to first-time and seasoned landlords with competitive rates.

    Barclays: Known for flexible buy-to-let mortgage options, Barclays offers repayment mortgages for buy-to-let investors with strong eligibility criteria, including steady income and good credit.

    Santander: Offers repayment and interest-only options, with competitive rates and additional support for landlords with multiple properties.

    The Mortgage Works (TMW): TMW, part of Nationwide Building Society, specializes in buy-to-let mortgages and offers both repayment and interest-only options tailored to landlords.

    Paragon Bank: Paragon offers buy-to-let repayment mortgages for landlords with more complex needs, including those with larger portfolios or houses of multiple occupancy (HMOs).

    Aldermore: A specialist lender that offers buy-to-let repayment mortgages, particularly for landlords with more challenging circumstances, such as adverse credit or unique property types.

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    Conclusion

    A buy-to-let repayment mortgage provides landlords with the ability to pay off their mortgage balance over time, ultimately leading to full ownership of the property. While interest-only mortgages remain more popular due to their lower monthly payments and tax advantages, repayment mortgages offer stability, reduced risk, and long-term benefits.

    Choosing between a repayment and interest-only buy-to-let mortgage will depend on individual circumstances, financial goals, and investment strategies. If you’re considering switching from interest-only to repayment, consult with a mortgage advisor to explore your options and find the best mortgage type to suit your buy-to-let investment plans.

    Get help from an experience mortgage broker

     

    You can speak to one of our specialist mortgage brokers who would be able to guide you through the process. They will advise if there is a lender available and the maximum loan amount based on your circumstances. We are a whole of market mortgage brokerage with access to all lenders. Call us on 01332 470400 or complete the form with your details for us to give you a call back.

    FAQs

    What is a buy-to-let repayment mortgage?

    A buy-to-let repayment mortgage is a loan where you pay back both the interest and the capital each month. Unlike interest-only mortgages (where the loan balance remains until the end), repayment mortgages allow you to build equity and own the property outright at the end of the mortgage term—usually 20 to 30 years.

    Is a repayment mortgage better than interest-only for buy-to-let?

    It depends on your strategy. Repayment mortgages offer long-term security and full ownership, ideal for landlords looking for a low-risk investment or retirement asset. Interest-only mortgages offer lower monthly payments and better short-term cash flow, making them popular for portfolio growth. A broker can help you decide based on your financial goals.

    What are the pros and cons of buy-to-let repayment mortgages?

    Pros:

    • Build equity over time

    • Own the property at the end of the term

    • Lower risk vs balloon payment at term end

    • Improved loan-to-value over time for refinancing

    Cons:

    • Higher monthly repayments

    • Lower short-term profits

    • Only the interest portion is tax-deductible

    Who offers buy-to-let repayment mortgages?

    Several high street and specialist lenders offer BTL repayment mortgages, including:

    • NatWest

    • Barclays

    • Santander

    • The Mortgage Works (TMW)

    • Paragon Bank

    • Aldermore
      Each lender has different criteria—Option Finance can help you match with the best provider based on your goals and financial profile.

    Can I switch from an interest-only to a repayment mortgage?

    Yes, many landlords switch to repayment mortgages to reduce long-term risk or prepare for retirement. You may also consider a partial repayment product if full repayment isn’t viable. A broker can assess your affordability and guide you through refinancing or product transfer options.

    Ready to Take the First Step?

    Whether you’re a first-time buyer, remortgaging, or moving home, bad credit doesn’t have to hold you back.

    Understanding credit scoring can help you prepare for a mortgage application. You can speak to one of our specialist mortgage brokers who would be able to guide you through the process. They will advise if there is a lender available and the maximum loan amount based on your circumstances. We are a whole of market mortgage brokerage with access to all lenders. 

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    Last Reviewed on: June 12, 2025