Mortgage calculator

Choose from our range of free-to-use mortgage calculators to see how much you could borrow and what your monthly repayments are likely to be.

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You could borrow up to

Loan to value (LTV):


Including your deposit, you could afford a house price up to:

Other fees you may have to pay:

Broker fee (with


Additional fees

Learn more
You may have to pay an early repayment charge if you remortgage.
Your home could be repossessed if you don't keep up repayments on your mortgage.
This calculator is only an estimate of how much you may be able to borrow. Talk to a mortgage broker or lender to get a more accurate figure.

What is a mortgage calculator?

A mortgage calculator is a handy tool that calculates different aspects of a mortgage, such as how much you can borrow and what your repayments are likely to be. 

Our mortgage calculator uses your information to estimate your potential borrowing amount or monthly repayment.

When using our mortgage calculator, it’s important to remember that it’s only designed to indicate how much you could borrow and doesn’t take into account all the aspects that will affect your ability to get a mortgage or impact the amount you’re able to borrow. 

How much can I borrow?

Before starting your house-hunting journey, you’ll need to find out how much you’ll be able to borrow because you’ll get a better idea of the price range for the houses you can consider. 

It's often said that an approximate calculation of your borrowing capacity is based on a multiple of your annual income, usually around three to four times your salary. While this provides a basic estimate, the actual borrowing amount hinges on various factors.

Our mortgage affordability calculator can give you a more accurate estimate of how much you’ll realistically be able to borrow. 

It’s important to remember that a few factors can affect your mortgage affordability that the calculator won’t consider. These include:  

  • Your credit score

  • Your monthly expenses

  • Costs associated with buying a house (such as stamp duty or conveyancing fees)

  • Changes in your mortgage interest rate

How do lenders calculate affordability?

Lenders look at various factors to assess how much you can afford to borrow, such as your income, outgoings and credit history. 

Each mortgage provider will have different criteria to determine how much and whether they’re willing to lend you money, but most will look at the following:

  • Your annual income - This includes your basic salary but can also include any bonuses or additional income you receive. 

  • Expenses and existing debts - Lenders will look at your regular monthly outgoings, financial commitments and debts to see whether you can afford monthly repayments. 

  • Credit history - Your credit history tells lenders how reliable a borrower you are. If you have a history of missing repayments or not making full repayments on your debts, lenders are less likely to want to lend to you or will offer to lend you smaller amounts of money with a higher interest rate. 

  • Current and potential interest rates - If interest rates are currently high, the amount you’ll be able to borrow will likely be lower because you’ll be paying more towards interest. Lenders will also stress test your ability to repay the mortgage even if interest rates were to rise in the future. 

  • Type of mortgage - Different types of mortgages will typically have different affordability criteria.

Our expert says…

"Our mortgage affordability calculator provides you with an estimate of your borrowing capacity, taking into account your income and deposit. This applies whether you're a first-time homebuyer or considering a move to a different property."


"You can also use our mortgage repayment calculator to see how your mortgage term and interest rate will impact your monthly payments”.

Nick Shershnev - Head of Product

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Mortgage Calculator FAQs

The information we’ll ask when using our mortgage calculator will depend on what you’re trying to calculate. 

If you want to find out how much you can borrow, we’ll ask for:

  • Your annual salary

  • Your partner’s salary (if you’re looking for a joint mortgage)

  • Your deposit amount

  • Your regular monthly outgoings (this is optional but can help to give a more accurate picture of how much you could borrow)

If you’re looking to get an idea of how much your monthly repayments will be, we’ll ask for:

  • Your mortgage amount (how much you want to borrow)

  • Your mortgage term (how long you’re borrowing for)

  • Your mortgage interest rate

No, using our mortgage calculator won’t impact your credit score.  

When you get a mortgage in principle, we’ll look at your credit history using something called a soft credit search, which won’t affect your credit score either. 

When you apply for a mortgage, we will perform a hard credit check, leaving a record on your credit report that other lenders can see. Having many hard searches on your credit report within a short period can impact your credit score. 

It’s important to remember that when you use other mortgage brokers or lenders to determine how much you can borrow, they may run a hard credit check.

You will need to be sure you can afford to make the monthly mortgage payments required for your entire mortgage term.

If your finances are likely to change or fluctuate in the future, this is something you should consider before committing to buying a home and getting a mortgage.

You should also keep in mind that mortgage interest rates can change over time as well.

Lenders will carry out a thorough analysis of your financial situation when they decide whether you can afford a mortgage. 

Besides your income, debt, and deposit/LTV amount, lenders will also take an in-depth look at your regular outgoings such as:

  • other loan or credit card repayments

  • childcare costs/maintenance

  • school fees

  • travel

  • household bills

  • Insurance payments

Some lenders will be harsher than others, so it’s a good idea to compare a few different lenders to see which one works best for you.

It’s important to discuss your monthly repayments with your mortgage broker to make sure you can realistically afford them when you take into account your other expenses and how your lifestyle will change when you start paying your mortgage back. 

You can use our monthly mortgage payment calculator to get an idea of how much your repayments would be. Remember that if you’re on a variable-rate mortgage, your monthly repayments could change. With a fixed-rate mortgage, your repayments will stay the same for your initial period. 

In principle, you should be able to borrow the highest amount recommended by lenders. This is because mortgage providers typically conduct stress tests to make sure you can still afford the repayments even if there's a future increase in interest rates. 

However, there are potential downsides to borrowing the maximum mortgage amount available to you. If interest rates climb and inflation leads to increased costs of things like utility bills and food, there's a possibility that repaying your mortgage might become challenging. Falling behind on mortgage repayments can result in severe financial hardship, and failure to maintain repayments could even result in the repossession of your home.

It's sensible not to use the entire suggested sum on your mortgage in principle when you make an offer on a property. This is because, during the mortgage application, the actual amount a mortgage provider is willing to lend to you might be lower if your credit history, income, or expenses affect the lender's decision. 

You’ll also need to be prepared for any changes to your circumstances, such as starting a family, losing your job, or needing to cover emergency expenses, such as a broken boiler. If you've borrowed the maximum amount, but a change in circumstances makes it difficult to repay your mortgage, you might have to consider selling your home.

Knowing how much you can afford to borrow when you’re self-employed can be a little trickier, and often the amount of mortgage you can get can vary significantly between lenders; most lenders will look at the average of your last two or three years' income or your most recent year of trading. 

How much you’ll be able to borrow with a self-employed mortgage will depend on factors including:

  • Your deposit

  • Your credit history

  • Your income

  • Your outgoings

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Important info & marketing claims

You may have to pay an early repayment charge to your existing lender if you remortgage. Your savings will depend on personal circumstances.

Your home may be repossessed if you do not keep up repayments on your mortgage.

*The savings figure of £506 is based on remortgage customers in December 2023. Read more on our marketing claims page.

We can't always guarantee we will be able to help you with your mortgage application depending on your credit history and circumstances.

Average mortgage decision and approval times are based on's historic data for lenders we submit applications to.

Tracker rates are identified after comparing over 12,000 mortgage products from over 100 mortgage lenders.

As of January 2023, has access to over 100 lenders. This number is subject to change.

For buy-to-let landlords, there's no guarantee that it will be possible to arrange continuous letting of a property, nor that rental income will be sufficient to meet the cost of the mortgage.