Buy-to-Let Mortgage Calculator

How much could you borrow?

Use your buy-to-let mortgage calculator to quickly find out how much you might borrow based on your details. It only take a few minutes and NO CREDIT CHECKS!

Smarter buy-to-let decisions start here

Use these guides and resources to get the best mortgage options and grow your portfolio confidently.

Couple celebrate buy to let mortgage.

Buy-to-let mortgage guide

This is your starting point to explore all essential buy-to-let mortgage information in one place.

woman reviews her first time buyer buy to let mortgage.

First-time buy-to-let buyers

First-time landlords face challenges, but specialist lenders can help you secure the right mortgage.

Limited company owner celebrates her buy to let mortgage.

Limited company buy-to-let

Using a limited company can save tax but involves specialist lenders and extra mortgage criteria.

Women in office with a laptop discussing buy to let mortgages.

Buy-to-let remortgage options

Switch lenders or products to secure better rates, lower costs, and maximise your rental profits.

Flats and apartments in a city, bought with secured loans for buy to let.

Secured loans for landlords

Borrow against your current property to fund investments, renovations, or debt consolidation.

Man happy about his interest only buy to let mortgage.

Interest-only buy-to-let

Explore interest-only mortgages, understand monthly payments, risks, and when they suit your goals.

Black man on laptop reviewing buy to let mortgage deals.

Buy-to-let for portfolio landlords

Combine mortgages for multiple buy-to-let properties to simplify finances and grow your portfolio.

Young couples celebrate hmo buy to let mortgage.

HMO Mortgages for Landlords

Mortgages for landlords with shared housing properties. Expert advice for HMO investments.

Frequently asked questions

Having a Buy-to-Let property can be like running your own business, which means you need to pay close attention to all costs. A Buy-to-Let mortgage calculator can be a valuable tool to help you understand how much you could borrow. Simply answer a few questions about your situation and plans, and our calculator will provide a guide on your potential borrowing amount.

This information allows you to plan in detail and ensures you are prepared when applying for a mortgage. It’s important to note that the figure provided by our Buy-to-Let mortgage calculator isn’t exact, as the amount can vary between lenders. Therefore, it’s best to discuss your situation with an expert mortgage advisor.

Assessing affordability is crucial for lenders for two primary reasons. Firstly, it provides them with an essential indication of how much you can afford to borrow, considering that you’ll need to repay them over time. Additionally, it serves as a measure of how profitable your Buy-to-Let property is expected to be, as the rental income is often utilised to cover mortgage payments to the lender.

While residential mortgages typically assess income and outgoings during the affordability assessment, Buy-to-Let mortgage affordability criteria differ slightly. Lenders still consider your income and outgoings, but they also factor in projected rental income. Since interest payments are part of the equation, the rental income should exceed the mortgage interest by a specified margin.

Usually, lenders require the rental income to be anywhere from 125% to 145% of the mortgage interest payment, assuming an interest rate between 5% and 5.5%. It’s advisable to be prepared for higher rates, especially when applying for an HMO Buy-to-Let.

During their assessments, lenders always conduct a stress test to ensure that you can make payments even if interest rates rise. However, if you opt for a fixed-rate mortgage for five years or more, calculations are based on the following:

  • A hike of at least 2% above current rates.
  • Market projections of future interest rates.
  • A minimum stress-test rate of 5% – 5.5%.

You can use our buy-t0-let mortgage calculator to gain an understanding of your borrowing potential.

If you have a property in mind, then you are likely to have an idea of how much rent you will charge. However, lenders won’t take your word for it. Therefore, they will use a surveyor to calculate this based on things such as the property value, market rates and location.

Lenders will also consider any void periods that may arise during ownership to keep things as realistic as possible. Typically, they assume there will be no tenants in the property one month out of the year.

During their affordability calculations, lenders may also factor in property-related expenditure, deducting it from the rental income. This can be costs such as letting agent fees, insurance, safety check costs and any maintenance fees.

Finally, an important consideration is the lenders imposed Loan-to-value (LTC) limit. This is set and will put a cap on how much they will lend. A maximum of 75% is very common for most lenders, although some do offer more.

Always remember that lenders will place their products in LTV tiers. Meaning, if you can provide a larger deposit, you are more likely to receive better interest rates.

Excellent

4.98 based on 936 reviews

Mamita Gurung

Verified user

⭐⭐⭐⭐⭐ Outstanding service from start to finish! I cannot recommend Mark Gardiner highly enough as a mortgage advisor. From our very first conversation, he took the time to fully understand my financial situation, goals, and concerns, and explained every step of the process in clear, simple terms—no confusing jargon at all. Mark went above and beyond to find the best possible mortgage deal tailored exactly to my needs, comparing options thoroughly and always keeping me updated with regular progress reports. He was incredibly responsive, patient, and proactive throughout, anticipating potential issues and resolving them quickly to keep everything on track. Thanks to his expertise, attention to detail, and genuine commitment to getting the best outcome for me, what could have been a stressful process felt smooth and straightforward. I felt completely confident and well-supported at every stage. If you’re looking for a knowledgeable, trustworthy, and dedicated mortgage advisor, Mark is the person to choose. I would not hesitate to use his services again or recommend him to friends and family.I will definitely use him in the future too. Great work

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United Kingdom, 1 week ago

Lisa-Marie Davis

Verified user

We were recently supported by John during our house sale and onward purchase. Everything was effortless and we were kept informed in a timely manner. John also supported us with updating our life insurance and even with some complications and delays John was committed to finding us the best deal and ensuring we had everything covered that we needed.

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United Kingdom, 1 week ago

Taranjeet Minhas

Verified user

I have been using Needham Mortgage centre for the last 15 years and have always received a brilliant and unbiased professional service. Recently introduced them to a work colleague who is a first time buyer and I tell you what, they havent let me down. Will highly recommed them anyone and everyone, all day & everyday!

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United Kingdom, 1 week ago

Lauren Bell

Verified user

John was absolutely amazing throughout what turned into quite a lengthy process. He was incredibly patient, kept in regular contact, and made sure we were fully informed every step of the way. His communication and support made a huge difference, and we’re really grateful for everything he did for us.

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United Kingdom, 1 week ago

Anonymous

Verified user

John and Niki were extremely helpful in arranging our recent re-mortgage. We were able to get a good fixed rate for the next five years. Any questions were answered promptly. I couldn't recommend Mortgage Centre highly enough.

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United Kingdom, 1 week ago

Rory Gooding

Verified user

I couldn't recommend Needham Mortgage Centre highly enough. From the start to the end of buying our first home, Jordan provided us with clear guidance and exceptionally prompt responses to any queries we had. For what we expected to be a stressful and confusing part of buying our first house, the Needham Mortgage Centre couldn't have done any more to make it understandable and stress-free.

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United Kingdom, 1 week ago

Heidi Jennings

Verified user

Mark provided friends and top tier service, he found us a mortgage that worked really well for us, and talked us through all the options so we could make informed decisions. He supported us throughout the entire process with getting our mortgage in principle when looking to buy, right up until completion, we look forward to returning to his service when our mortgage needs renewing. He also put us in touch with other members of the team who helped us with all the different types of insurances, which made the process of buying as a first time buyer so smooth. Thank you for all your support Mark and the rest of the team.

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United Kingdom, 1 week ago

Jordan Hamlin

Verified user

We as first time buyers was worried with the the mortgage process but we had Jordan Gardiner who was brilliant finding us the best deals. He is very knowledgeable and professional explaining everything very efficiently and always replying very quickly if we had any questions at all. He had made the process totally stress free. I would 100% recommend Needham Mortgage Centre to anyone looking to remortgage or are trying to get on the property ladder.

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United Kingdom, 1 week ago

Charlotte Gardiner

Verified user

Needham Mortgage centre has been incredible throughout our last two moves. They have provided us with excellent advice and support. They kept us updated and chased others where needed. Excellent service.

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United Kingdom, 1 week ago

Elizabeth Twyman

Verified user

We have used Mark from Needam morgage centre for the purchase of our home a few years ago and now to remortgage. He is an expert in his field and knows everything there is to know. Would never use anyone else. Highly recommend.

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United Kingdom, 1 week ago