How Much Mortgage Can You Get For £300 Per Month?

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Home Mortgage Affordability How Much Mortgage Can You Get For £300 Per Month?
Pete Mugleston

Author: Pete Mugleston

CeMAP Mortgage Advisor, MD

Jon Nixon

Reviewed by: Jon Nixon

Former Director of Distribution

Updated: July 16, 2025

In this article, you’ll learn what mortgage you might be able to get for £300 per month and how a broker can help make sure you get the right deal according to your circumstances.

What type of mortgage can you get for £300 per month?

Realistically, there are 2 potential mortgage types which might be available:

Interest-only is usually your best bet if you’re looking for a buy-to-let mortgage for approximately £300 per month, as you could invest your rental income in your repayment vehicle.

The main factors that will affect how much you can borrow are the size of your deposit, interest rate, and the term of your mortgage. Other factors will also affect this, but these are the key drivers.

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How much can you borrow with this budget?

There are many factors that will determine how much you could borrow, but the table below gives a mix of scenarios to illustrate. It’s important to understand and highlight the difference the mortgage term and the interest rate will make (aside from your deposit, which you’ll need to consider). 

Estimated monthly repayment Interest rate Mortgage term Size of mortgage
£253 4.50% 30 years £91,203
£278 4.50% 25 years £83,375
£292 5.00% 25 years £87,689
£268 5.00% 30 years £96,628
£307 5.50% 25 years £92,113
£322 6.00% 25 years £96,645
£300 6.00% 30 years £107,919

For this table, we assume the interest rate stays the same for the full length of the mortgage. Interest rates can change if you decide to remortgage to a different rate or move from a fixed or discounted deal to the lender’s standard variable rate (SVR).

How is affordability calculated?

Maximum mortgage borrowing is not based on the amount you have budgeted for monthly repayments: £300 per month. Most mortgage providers determine this based on a multiple of your annual salary.

Most lenders use income multiples to calculate your borrowing capacity. The maximum you can borrow is between 4.5 and 5 times your annual salary. However, some lenders might consider letting you borrow six times your income under the right circumstances.

Use the calculator below to calculate how much you could borrow based on your income:

Mortgage Affordability Calculator

Use this calculator to determine how much you could potentially borrow for a mortgage, based on the typical salary multiples used by most UK lenders.

Include all income types: salary, bonus, overtime, self-employed, benefits, pensions, maintenance. Even if you've been told it won't count, add it anyway – some lenders are more flexible than others.
£

Based on your total household income, you could borrow up to:

*

4.5x income

This is what most lenders would consider letting you borrow

5x income

Some lenders would consider letting you borrow this amount

6x income

Very few lenders would consider letting you borrow this amount

*To get exact numbers based on your specific income, outgoings, age and other info, you'll need to speak to one of our experts. Lending policies change regularly, so this is purely for illustrative purposes only, and is not tailored financial advice.

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Get matched with a broker specialising in smaller mortgages

It’s possible to get a mortgage for £300 per month. You must consult a mortgage broker with experience helping people in your position and a strong network of lenders.

The brokers we work with have relationships with high-street banks and specialist lenders who often take a more flexible approach to underwriting. This allows room for negotiation and the chance to borrow based on higher income multiples.

We offer a unique broker-matching service designed to find the best based on your circumstances and the broker’s knowledge and experience.

Call today on 0330 818 7026 or enquire online to arrange a free, no-obligation chat.

Get an expert to confirm the lowest repayments available to you today

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Ask Us A Question

We know everyone's circumstances are different, that's why we work with mortgage brokers who are experts in all different mortgage subjects.







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Pete Mugleston

CeMAP Mortgage Advisor, MD

Pete, a CeMAP-qualified mortgage advisor and an expert in all things mortgages, cut his teeth right in the middle of the credit crunch. With plenty of people needing help and few mortgage providers lending, Pete successfully went the extra mile to find mortgages for people whom many others considered lost...

Pete, a CeMAP-qualified mortgage advisor and an expert in all things mortgages, cut his teeth right in the middle of the credit crunch. With plenty of people needing help and few mortgage providers lending, Pete successfully went the extra mile to find mortgages for people whom many others considered lost causes. The experience he gained and his love of helping people reach their goals led him to establish Online Mortgage Advisor, with one clear vision – to help as many customers as possible get the right advice, regardless of need or background.

Pete’s presence in the industry as the ‘go-to’ for specialist finance continues to grow, and he is regularly cited in and writes for both local and national press, as well as trade publications, with a regular column in Mortgage Introducer and being the exclusive mortgage expert for LOVEMoney. Pete also writes for Online Mortgage Advisor of course!

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