Mortgage Calculators
Use the calculators below to see what you could borrow and repay, then read on for why the figure a calculator gives you is a starting point, not an offer.
Over the last 15 years, we’ve helped nearly 700,000 customers get the right advice. We guarantee to get you the best mortgage you can get – or we’ll give you £100!
Which calculator would you like?
Select the calculator that suits your needs
Over the last 15 years, we’ve helped nearly 700,000 customers get the right advice. We guarantee to get you the best mortgage you can get – or we’ll give you £100!
⚠️ Calculators give a rough idea - experts give exact numbers.
With 100+ lenders using completely different affordability rules, the only way to see what you actually qualify for is to speak to a broker (a good one!). That’s why we’re here. We’re happy to chat through the numbers with you and help in any way we can, including getting you an Agreement In Principle (AIP) with the best lender whenever you’re ready.
Here, you’ll find a range of mortgage calculators that can crunch the vital numbers for all of your home finance requirements.
From mortgage repayments and affordability calculations to equity release and bridging loan estimates, select the calculator you need from the list below to get started.
Select a Calculator
Mortgage Repayment Calculator
Mortgage repayment calculator: shows your monthly payment and total cost for any loan, rate and term.
The monthly repayments on a mortgage would be:
- Loan amount:
- Monthly repayments:
- Total to repay:
- Total interest:
How interest-only mortgages work:
With an interest-only mortgage, you only pay the interest each month. The original loan amount (the principal) remains unchanged and must be repaid in full at the end of the mortgage term. This means lower monthly payments, but you'll need a repayment plan for the full loan 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.
Speak to one of our brokers to save money on your monthly repayments
- Free initial consultation with no obligation
- A dedicated expert team to handle everything for you
- Honest, unbiased advice from whole-of-market brokers
- Expert guidance tailored to your situation
Debt to Income Ratio Calculator
Debt-to-income ratio calculator: shows what share of your income goes on debt, which lenders check before they lend.
This calculator allows you to calculate your debt-to-income ratio and will indicate whether mortgage lenders will classify it as low, medium, or high risk.
Your Results:
Your Debt to Income Ratio is %
Good news! Most mortgage lenders will class your debt-to-income ratio as low. You’re unlikely to be declined for a mortgage based on your outgoings, but speaking to a mortgage broker before applying is still recommended as they can improve your chances of getting the best deal.
Most mortgage lenders will class your debt-to-income ratio as moderate, which means some of them might view your application with caution. Some lenders are much more strict than others when it comes to affordability and debt, so it’s important for you to find a lender who’s more lenient. You should speak to a mortgage broker before you apply to ensure you’re matched with a lender whose criteria you fit.
Most mortgage lenders will class your debt-to-income ratio as high. But that’s where we can help! With so much of your monthly income going towards debt repayments, you could struggle to get approved for a mortgage without the help of a mortgage broker. We can help you find a lender who’s more lenient on debt and affordability, and could still secure a mortgage approval.
Mortgage Affordability Calculator
Mortgage affordability calculator: shows maximum borrowing at 4.5x, 5x and 6x income, so you can see how lenders differ.
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.
Speak to a mortgage expert about your options
- Free initial consultation with no obligation
- A dedicated expert team to handle everything for you
- Honest, unbiased advice from whole-of-market brokers
- Expert guidance tailored to your situation
Mortgage Difference Calculator
Mortgage difference calculator: shows what a change in rate or term does to your monthly payment.
This calculator can help you estimate how much your mortgage rate is likely to increase or decrease following the latest change in the Bank of England's base rates.
Your Results:
We estimate your current monthly repayments are
At this rate, your payments could change by…
Speak to an experienced broker to help find you the best mortgage solution for your current circumstances.
Get StartedEquity Release Calculator
Equity release calculator: shows how much you could release from your home, based on your age and its value.
Use this calculator to determine how much capital you could unlock from your home through equity release, based on your age and the property's market value.
Your Results:
The Maximum Equity you could release is
The amount is of your homes value, the maximum most borrowers your age can release.
Get Started with an Equity Release Specialist and find out exactly how much you could release.
Get StartedBridging Loan Calculator
Bridging loan calculator: shows the cost of short-term borrowing between a purchase and a sale.
You can use our bridging loan calculator to calculate your LTV (Loan-to-Value) ratio and get an estimate of your monthly finance costs as well as the total interest you will pay.
Your Results:
Loan-to-value:
Total monthly payment:
Total interest:
Now that you have a clearer idea of how much your loan will cost, you should speak to a bridging finance broker to explore all of your options and boost your chances of getting the best deal possible.
Get StartedSelf Employed Calculator
Self-employed calculator: shows maximum borrowing from your trading income, using the multiples lenders apply.
This mortgage calculator enables self-employed individuals to calculate their maximum borrowing amount based on their trading style, income type, and other key variables.
Your Results:
You could borrow up to
Most lenders would consider letting you borrow
This is based on 4.5 times your net profit or the total income declared. To borrow more than this, you will need to speak to a mortgage broker who specialises in self-employed borrowers
This is based on 4.5 times your share of the partnership's net profit or total income declared. To borrow more than this, you will need to speak to a broker who specialises in self-employed borrowers
This is based on 4.5 times your share of the net profit/salary plus dividends, or total income declared. To borrow more than this, you will need to speak to a broker who specialises in self-employed borrowers.
This is based on 4.5 times your income. To borrow more than this, you will need to speak to a broker who specialises in self-employed borrowers.
Some lenders would consider letting you borrow
This is based on 5 times your net profit or your total income recieved. This income multiple is often unavailable to borrowers who aren't applying through a mortgage broker.
This is based on 5 times your share of the partnership's net profit or your total income recieved. This income multiple is often unavailable to borrowers who aren't applying through a mortgage broker.
This is based on 5 times your share of the net profit/salary plus dividends, or your total income recieved. This income multiple is often unavailable to borrowers who aren't applying through a mortgage broker.
This is based on 5 times your income. This income multiple is often unavailable to borrowers who aren't applying through a mortgage broker.
A minority of lenders would consider letting you borrow
This is based on 6 times your net profit or the total income declared. This income multiple is only available under specific circumstances and is usually only accessible via a broker.
This is based on 6 times your shares of the net profit or total income declared. This income multiple is only available under specific circumstances and is usually only accessible via a broker.
This is based on 6 times your share of the net profit/salary plus dividends, or total income declared. This income multiple is only available under specific circumstances and is usually only accessible via a broker.
This is based on 6 times your income. This income multiple is only available under specific circumstances and is usually only accessible via a broker.
Now that you have a rough idea of your maximum borrowing, get in touch to speak to a mortgage broker who can provide bespoke calculations and access to the best rates and deals.
Get Started
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What is a mortgage calculator?
A mortgage calculator is a category of online tools that you would generally use for one of two purposes: working out monthly repayments or calculating your affordability.
There are standalone calculators on our site for mortgage affordability and mortgage repayments, but these aren’t the only ones available.
Other types of mortgage calculator include…
- Buy-to-let mortgage calculators: For working out your affordability and repayments based on projected rental income.
- Loan-to-value calculators: For working out your LTV ratio
- Self-employed mortgage calculators: These show maximum borrowing for various types of self-employed traders, such as contractors, company directors and more.
- Remortgage calculators: For working out what kind of remortgage deal you can get and how much equity you can potentially release, if you wish to.
You’ll also find calculators for specialist types of finance, including bridging loans, equity release and offset mortgages.
How do they work?
Each of our mortgage calculators works differently depending on which of these tools you’re using, but you’ll find easy-to-follow instructions built into the calculators themselves. Each one requires no more than a few personal details to crunch the numbers you need.
In terms how our two main calculators determine your results, our mortgage affordability calculator takes your salary and multiplies it by the three most common income multiples that mortgage lenders use to determine maximum borrowing: 4.5, 5 and 6, and displays results for each one so you can compare how much you could potentially borrow across the market.
Our mortgage repayments calculator takes your loan amount, interest rate and term length and works out how much you will pay each month based on these factors. It returns results for a capital repayment mortgage by default but you can change this to interest-only for comparison.
The other calculators you will find on our site work similarly, with any notable differences and specifics clearly explained in the copy within the tools themselves.
Why use a mortgage calculator?
They can be really useful as a starting point if you’re planning to apply for a mortgage, a remortgage or take out another type of finance that our calculators cover.
With a mortgage affordability calculator, you can get a rough idea of the maximum amount you could potentially borrow as well as the number of lenders you’ll have to choose from. For example, if you need to take out a mortgage worth more than 5 times your salary, you will know that your options might be limited to the kind of niche lenders you’d need a broker to find.
Knowing that your mortgage is affordable can also give you peace of mind and a clearer idea of what you need when the time comes to prepare your application.
Similarly, using a mortgage repayments calculator can give you a firm idea what your budget will be once you have your mortgage, as well as how that might vary depending on what interest rate you secure and term length you choose. Some borrowers might also find it useful to compare what their mortgage will look like on an interest-only agreement vs. a repayment one.
Are mortgage calculators accurate?
Repayment calculators are accurate – You enter the same loan, rate and term into any of them, and they agree (to the pound) because the arithmetic is fixed.
Affordability calculators are not, and that’s where many buyers get caught.
Each lender’s tool builds in its own income multiple, stress rate and treatment of outgoings, and almost none of them say so. The same buyer can be told very different figures by different high-street lenders before a single application is made, and the number only becomes real when a lender actually underwrites it.
Even Google’s own calculator, which can appear above the results when you search for mortgage calculators, often answers in US dollars with a 30-year term and a 6.5% rate by default. It’s a reminder that the first figure you see is a starting point, not an offer.
Newspage, the news agency, is testing the main UK affordability calculators side by side in research sponsored by Online Mortgage Advisor. We’ll publish the findings here when the story runs.
Get bespoke calculations from a mortgage broker
The best way to get fully accurate mortgage calculations that are bespoke to you is by using our matching service to be paired with your ideal mortgage broker.
Not only will they be able to provide you with personalised figures for your affordability and repayments, they can add context to these numbers by introducing you to the mortgage lender who is best placed to offer you the mortgage you need with the best possible rate.
Call 0330 818 7026 or make an enquiry and we’ll match you with a mortgage broker for a free, no-obligation chat and bespoke mortgage calculations today.
Speak to an expert
Calculators are great, but they don't tell you everything you need to know. If you'd prefer an expert advisor to help, fill this out!
FAQs
On a residential mortgage, the maximum amount would usually be 4.5 times your annual salary, although some lenders might stretch to 5 or 6 times your income.
The higher income multiples are typically reserved for borrowers with strong applications, which typically means a large deposit and stable income. Some lenders reserve their 6-times-salary mortgages for people in high-earning professions, such as doctors and lawyers.
This is usually based on the property’s projected rental income. To pass an affordability assessment for a buy-to-let mortgage, most lenders expected the forecast rental income to exceed the mortgage payments by 125% to 145%.
Repayment calculators are exact for the figures you enter. Affordability calculators are estimates built on each lender’s own rules, so they differ, and only an application gives you a real figure.
Because the calculator used one set of assumptions and the bank used its own: income multiple, stress rate, how it treats your outgoings and your deposit. Neither is wrong; they’re answering different questions.
Most lend between 4.5 and 5 times income; a few go to 5.5 or 6 for some borrowers. The multiple you get depends on your income, deposit, credit and the lender.
A broker checks your actual circumstances against each lender’s real criteria, which is why the figure can be higher or lower than any calculator, and why it’s the one that holds.
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