Is the buy to let mortgage calculator accurate?

The buy to let mortgage calculator offers a helpful estimate based on your rental income and property value, but it’s only a guide. Lenders take additional factors into account, such as your credit history, personal income, and overall financial situation, which the calculator can’t assess fully. To get a more accurate figure and access to the most suitable mortgage deals, it’s recommended to speak with a mortgage broker like us. We can help you navigate the complexities of buy to let mortgages and find a solution tailored to your investment needs.

How do interest-rates affect my mortgage payments?

Interest rates play a crucial role in determining your monthly mortgage payments, especially for a buy to let mortgage. Higher interest rates increase the cost of borrowing, meaning your monthly payments will be higher, which can reduce your rental yield If you have a tracker or variable rate mortgage, your payments will fluctuate based on changes to the Bank of England’s base rate. For stability, many landlords opt for fixed-rate buy to let mortgages, locking in their payments for a set period. Speaking with a mortgage broker can help you explore the most suitable rates available for your buy to let investment.

How is my loan value over time worked out?

Your loan value decreases over time as you make your monthly mortgage payments, with each payment contributing towards both the interest and the loan balance (the principal). The speed at which the loan decreases depends on the type of mortgage you have. With a repayment mortgage, each payment gradually reduces both the interest owed and the principal, so your loan balance decreases steadily. With an interest-only mortgage, you’re only paying the interest each month, meaning the loan balance remains unchanged until you repay the capital in full at the end of the term.

How much can I borrow for a mortgage?

Your loan value over time is determined by several factors, including the type of mortgage and how much capital you repay each month For a buy to let mortgage, if you choose an interest-only deal, your loan amount will remain the same until the end of the term, as you only pay the interest each month. With a repayment mortgage, each monthly payment reduces both the capital and interest, meaning your loan balance decreases over time. To understand which option suits your long-term property investment goals, speaking with a broker can provide tailored mortgage advice .

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

For a buy to let mortgage, most lenders typically require a minimum deposit of 25% of the property’s value, though this can vary based on your circumstances and the lender’s criteria. Some may ask for as much as 40%, especially if you are looking for better interest rates or have a more complex financial situation. A larger deposit can help you secure more favourable terms. Speaking with a mortgage broker can help you explore your options and understand how much deposit you’ll need based on your investment goals.

Should I use a mortgage broker?

Using a mortgage broker for your buy to let mortgage is highly recommended. Mortgage brokers like us have access to a wide range of lenders, including specialist buy to let deals that may not be available directly to landlords. We can help you navigate the often complex requirements, such as rental income calculations and affordability assessments. By working with a broker, you’ll save time and have a better chance of securing a competitive rate, while ensuring the mortgage suits your investment strategy.

Buy to Let Mortgage Calculator | Buy to Let Repayment Calculator

Property price*

Deposit*

Loan amount

Mortgage type*

Interest Only Repayment

Interest rate (%)*

Loan duration (5-40 years)*

Additional fees to take out the mortgage

The monthly repayment amounts provided by this calculator are for illustrative purposes only and are based on the details you have entered. Actual repayments may vary depending on the lender's criteria, fees and terms. Other factors, such as your credit score and individual circumstances, may also affect the final repayment amount. Please use this as a guide only and speak with a mortgage advisor for an accurate figure.

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10 Apr 2026

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Very professional service from Manchester moneyman, my advisor was easily contactable throughout and secured me a good mortgage deal - would recommend!

9 Apr 2026

Eden Shannon

As first-time buyers, the mortgage process felt quite daunting at first, but Chris made everything so much easier for us. He was incredibly supportive throughout and always took the time to explain things clearly so we understood each step of the process. Chris was also very communicative and kept us updated regularly, which really helped to reassure us during such an important time. Nothing ever felt like too much trouble, and he was always happy to answer any questions we had. We’re very grateful for all the help and guidance Chris gave us along the way and would highly recommend him to anyone looking for a mortgage advisor. We also have communications with Lizzi as she did the administrative work on behalf of Chris. She was also great at keeping us up to date and making sure we had provided the correct documentation. She gave us an idea of what the next steps would be throughout the process. We are grateful for the support we've had from UK Money Man.

8 Mar 2026

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

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