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The maximum loan you can borrow is:

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This is not a quotation under the Consumer Credit Act. Figures are subject to validation of income, credit checks and a property valuation. This buy-to-let mortgage calculator should be used as a guide. We strongly advise that you speak to one of our advisers about your situation before committing to anything.

How Much Can I Borrow for My Buy-to-Let Mortgage?

Our buy-to-let mortgage calculator will give you an estimate of how much money you can borrow to fund the purchase of a property that you intend to let out to tenants. 

Enter your proposed monthly rent details below, select either 5% or 5.5% on the stress test rate field and use the Calculate button. Please note the calculation assumes a buffer of 125%.

What Do These Fields Mean?

It’s important to make sure you understand the relevant fields when you fill out a buy to rent mortgage calculator.

What Is a Stress Test Rate?

When measuring affordability for a mortgage for buy-to-let, lenders stress test applications against mortgage rates rising to 5% and sometimes to 5.5%, even if the agreed final rate is lower, to guard against unexpected rises in costs for landlords.

What Is the Proposed Monthly Rent?

Lenders also typically require a buffer of 125% - i.e. the rental income each month must be 125% of the mortgage repayments.

Enter your proposed monthly rent, select 5 or 5.5 - some lenders are beginning to stress test at a higher level, so you may want to see both scenarios - and press Calculate.

Our buy-to-let maximum loan calculator is a great way to start – but it’s certainly not a definitive answer – and if it’s not the answer you’re looking for, our experts can review your full situation and advise on the most appropriate course of action, including products you might not previously have considered.

Looking for Another Calculator?

See our list of mortgage calculators for tools to help you work out things like buy-to-let Stamp Duty, rental yield and more.

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