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Buy to let mortgage calculator

Calculate how much you can potentially borrow based on rental income.

  • Get clarity and confidence in your investment planning
  • Quick estimates with no personal details or credit checks
  • Compare buy to let mortgage deals from 100+ lenders when you're ready
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How much can I borrow for a buy to let mortgage based on my rental income?

You could borrow up to

What next?

Contact us for more details
How much would this be each month?
How much rent should I charge?

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What is a buy to let mortgage calculator?

A buy to let (BTL) mortgage calculator estimates how much you could borrow based on rental income, giving you a starting point for planning your next investment.

When purchasing a property to rent out, you need to understand other important figures such as your monthly mortgage payments and any applicable stamp duty costs. To simplify your research, consider using our additional tools designed to support your planning:

How can our buy to let calculator help?

Our BTL mortgage calculator is tailored to give you the insight you need to make informed decisions. With it, you can:

  • Understand how much you may be eligible to borrow
  • Compare different deals to find the right option for your needs
  • Identify properties that fit within your budget

How to use our BTL mortgage calculator

Using our calculator to find out how much you can borrow for a buy to let mortgage is easy. Simply enter:

  • Expected rental income – Unlike a residential mortgage, the amount you can borrow depends on the monthly rent you expect to earn from the property. Lenders typically require the rental income to cover at least 125% of the mortgage interest payments.
  • Property value – The total value of the property you’re considering influences your loan-to-value (LTV) ratio, which is the percentage of the property’s value that you're borrowing. Most lenders offer a maximum LTV of 75% on BTL mortgages, so the property value directly affects how much you can borrow based on this limit. For example, for a £200,000 property at 75% LTV, you could borrow no more than £150,000.

Based on this information, the calculator will provide an estimate of your borrowing potential, empowering you to explore your options with greater clarity.

Why choose Alexander Hall to find you a bespoke BTL mortgage solution?

With more than 30 years' experience providing best-in-class mortgage advice, Alexander Hall is uniquely positioned to help you navigate the complexities of property investment. Here’s why we’re a trusted choice:

  • Impartial advice: Our advisers work for you, not the lenders, ensuring your interests always come first.
  • Extensive network: After giving you an estimate of how much you could borrow, we compare buy to let deals from more than 100 lenders to find a solution tailored to your portfolio goals.
  • Streamlined process: We handle the details, from application to negotiation, freeing up your time for what’s next in your investment journey.
  • Trusted by thousands: With more than six thousand five-star reviews on Trustpilot, you can count on us to deliver our promise of exceptional service.
  • Award-winning service: We've received plenty of recognition for excellence, including Best Broker for Customer Service at the 2024 Legal & General Mortgage Club awards.

When you’re ready to get in touch, our experienced team are here to provide the guidance and support you need.

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Buy to let mortgage calculator FAQs

No, our calculator doesn’t require a credit check, so you can use it as many times as you need to without affecting your credit score. We don't ask you for any personal information, just your expected rental income and the property value.

Our calculator gives you an estimate based on the details you provide, providing a rough idea rather than a guarantee. Buy to let lenders calculate how much you can borrow using additional factors like:

  • Your credit history
  • Your employment status
  • Your annual income
  • Any existing debts you have
  • Lender-specific criteria

It’s a useful tool for planning but speaking with an advisor will provide more precise options.

No, your deposit doesn't change how much you can borrow. Most lenders require you to put down a 25% deposit, which means the amount you can borrow won't be more than 75% of the property's value. Putting down a deposit larger than 25% would actually mean you'd borrow less.

However, it might still be worth putting down a larger deposit if you can afford to, as it could give you access to more competitive rates.

There are both benefits and drawbacks to putting down a smaller deposit and borrowing the maximum amount you can.

Potential advantages:

  • Purchasing a more expensive property, which could increase your rental yield
  • Spreading your money across multiple investments
  • Preserving cash to cover property renovations and emergencies

Potential disadvantages:

  • Higher monthly payments, which could strain your cash flow
  • Receiving less favourable interest rates, increasing the overall cost of your mortgage
  • Risking negative equity if house prices fall and your mortgage balance exceeds the property's value

Our expert advisors can help you better understand your options, enabling you to make an informed decision that aligns with your individual circumstances and investment goals. Ready to talk through your options? Call us now on 08000 38 37 36

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