£100,000 Mortgage: Monthly Repayments & Income Requirements
Looking for information on a £100,000 mortgage? Find out what your repayments could be, how much income and deposit you’ll need, and how our brokers can help you secure the right deal.
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Over the last 10 years, we’ve helped over 600,000 customers get the right advice.
We guarantee to get your mortgage approved where others can’t – or we’ll give you £100*
Author: Pete Mugleston
CeMAP Mortgage Advisor, MD
Reviewed by: Nathan Porter
Independent Mortgage Advisor
The repayments on a £100,000 mortgage will differ from person to person depending on the type of mortgage you get. Mortgage repayments are also affected by term length; the longer your term, the smaller your monthly repayments will be, but the more you’ll pay in the long term.
Interest rates affect how much you pay; the higher the rate, the more you’ll pay. The mortgage type can also affect your repayments. An interest-only mortgage, for example, will only repay the interest charges, not any of the money you’ve borrowed.
In this article, we’ll look at what the monthly repayments for a £100,000 mortgage could be, how much annual income you’ll need to acquire a mortgage for this amount, how much deposit you’ll need, and why using a mortgage broker can help secure the lending you need at the most competitive interest rates.
Whether you’re a first-time buyer, planning to remortgage, or in any other situation, our expert mortgage brokers are here to help you secure the right mortgage for your needs.
In this article:
How much would a 100k mortgage cost monthly?
At the time of writing (September 2025), the average monthly repayments on a £100,000 mortgage are £585. This is based on current interest rates being around 5%, a typical mortgage term of 25 years and most borrowers opting for a capital repayment mortgage. Based on this, you would repay £175,377 by the end of your mortgage term.
Use our calculator below to get more ideas of your potential monthly repayments. You can use various interest rate examples, input the amount you’re looking to borrow (in this case, £100,000), and the preferred term for your mortgage.
You can also speak to one of the advisors we work with for a representative idea of what you might repay. They can help you secure favourable terms and lower repayments than you might get if you try to secure a mortgage yourself.
Mortgage Repayment Calculator
This calculator can tell you the monthly and overall cost of your mortgage, based on the loan amount, interest rate, and term length.
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The monthly repayments on a mortgage would be
The total amount paid at the end of your mortgage term would be
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How much do you need to earn to get a £100k mortgage?
The amount you can borrow is based on your salary. Most lenders will loan around 4-4.5 times your income. So, to get a £100,000 mortgage, you’ll need to earn between £18,000 and £25,000. This is below the average UK annual salary, currently £37,430 (September 2025).
You might want to consider getting a joint mortgage with someone if you earn less than the average salary or the figures listed above. By doing so, your combined earnings can be used for this calculation.
Some lenders may also be willing to offer 5 times or even 6 times your annual salary, but this will depend on your circumstances and whether you meet their often stricter eligibility criteria. For example, most lenders will only lend 6 times the annual salary to certain professions deemed low risk, such as teachers and nurses.
The chart below helps to illustrate how this works in more detail.
You can enquire with one of the advisors we work with to find out how they can help you increase your chances of being approved for a £100,000 mortgage.
| Income | 4x income | 4.5x income | 5x income | 5.5x income | 6x income |
|---|---|---|---|---|---|
| £18,000 | £72,000 | £81,000 | £90,000 | £99,000 | £108,000 |
| £19,000 | £76,000 | £85,500 | £95,000 | £104,500 | £114,000 |
| £20,000 | £80,000 | £90,000 | £100,000 | £110,000 | £120,000 |
| £21,000 | £84,000 | £94,500 | £105,000 | £115,500 | £126,000 |
| £22,000 | £88,000 | £99,000 | £110,000 | £121,000 | £132,000 |
| £23,000 | £92,000 | £103,500 | £115,000 | £126,500 | £138,000 |
| £24,000 | £96,000 | £108,000 | £120,000 | £132,000 | £144,000 |
| £25,000 | £100,000 | £112,500 | £125,000 | £137,500 | £150,000 |
Bear in mind that if you’re applying for a joint mortgage with one or more other applicants, lenders will usually look at your combined earnings. Limited options are available, usually through a broker, for people who need to borrow up to 6x salary.
The above table is for comparative purposes only. For the most up-to-date information on affordability criteria, you should talk to your mortgage lender or broker.
If you’d like to test this for yourself based on your annual income, take a look at our mortgage affordability calculator below:
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.
Your Results:
You could borrow up to
Most lenders would consider letting you borrow
This is based on 4.5 times your household income, the standard calculation used by the majority of mortgage providers. To borrow more than this, you will need to use a mortgage broker to access specialist lenders.
Some lenders would consider letting you borrow
This is based on 5 times your household income, a salary multiple you might struggle to qualify for without the help of a broker. This income multiple is not widely available to customers who are applying directly with a lender.
A minority of lenders would consider letting you borrow
This is based on 6 times your household income, a salary multiple you will struggle to get without a broker. Six-times salary mortgages are usually only available under very specific circumstances.
Get Started with an expert broker to find out exactly how much you could borrow.
Get StartedHow much deposit do you need for a £100,000 mortgage?
Currently, lenders impose minimum deposit requirements for residential mortgages between 5% and 10%—this is based on the property value, NOT the mortgage amount.
If you were buying a property with a value of £100,000 (rather than borrowing this amount), you’d need a deposit of at least £5,000-£10,000, and your mortgage would be between £95,000-£90,000.
It’s possible to secure a mortgage for £100,000 with no deposit, but this is extremely rare.
If you have bad credit or are looking for a mortgage on a non-standard construction property, you may need a higher deposit of at least 25%. However, this will reduce the pool of lenders available to you.
Most lenders ask for a minimum deposit of 20% for buy-to-let mortgages, although a mortgage broker with experience in this area should be able to identify some who will ask for less.
The higher your deposit, the more likely you are to qualify for the most competitive interest rates, as mortgage lenders reserve their best rates for mortgages with the lowest loan-to-value (LTV). Our calculator below shows how this works.
LTV Calculator
This calculator will tell you what your loan-to-value (LTV) ratio is, based on the property's value, your deposit/equity and the amount you're borrowing.
Your Results:
Your LTV is
This means that most mortgage providers will consider your deposit amount to be more than satisfactory, but speaking to a broker is still recommended to ensure you get the best deal.
This means you’re likely to meet the deposit requirements at most lenders, but since many reserve their best rates for those with higher deposits, speaking to a broker is recommended.
Many mainstream mortgage providers would consider this high and be reluctant to lend. Applying through a mortgage broker may be necessary to find a specialist low deposit mortgage lender.
LTVs have a direct impact on the rates available to you - speak to a mortgage broker and find out how to get the best deal based on your ratio.
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How to get a £100,000 mortgage
After making your calculations, the next step in your mortgage application should be to speak to a mortgage broker to ensure you get the best rate and deal on your mortgage. Enquire with us and we will match you with the right advisor.
They’ll be able to help with:
- Deposit requirements: You’ll need to save a minimum deposit of 5% to 10% for a £100,000 mortgage. How much this figure will be depends on the value of the property, but a 10% deposit on a £100,000 house would be £10,000. A simple way to help you save money is to set up a savings account and put a percentage of your monthly wage, around 10 to 15%, into the account each month.
- Downloading and optimising your credit reports. Before you apply, it’s important to check your credit history to ensure no bad credit issues exist and remove any inaccurate or outdated information that could hinder your chances of securing the mortgage you need.
- Gathering all the necessary paperwork for your application: Your broker will be able to guide you through the application process and all the typical documents required – proof of income, at least three months of bank statements, personal ID, proof of address, evidence of deposit, latest P60 form etc.
- Finding the right lender offering the best rates. Your broker can save you a lot of time and, potentially, some money by identifying the mortgage lenders currently offering the most competitive interest rates across the market.
- Guiding you through the process: Getting a mortgage can be difficult, especially if it’s your first application. The right mortgage broker can help you with any issues you may face along the way, look after your interests and be a lifeline in case anything goes wrong.
Example monthly repayments for a £100k mortgage
Below are some examples to give you an idea of what your payments could be for a mortgage this size and to illustrate how different factors – namely, the interest rate and term – can change the monthly cost.
For interest-only mortgages, the repayment remains as is regardless of the term. So, for example, the repayment shown for 6% – £500 per month – would be the same if you opted for a 15-year- or 30-year term as the capital owed doesn’t reduce and is paid off in full at the end using a separate repayment vehicle.
| Interest rate | 15 years | 20 years | 25 years | 30 years | 35 years | Interest-only |
|---|---|---|---|---|---|---|
| 1% | £598 | £460 | £377 | £322 | £282 | £83 |
| 2% | £644 | £506 | £424 | £370 | £331 | £167 |
| 3% | £691 | £555 | £474 | £422 | £385 | £250 |
| 4% | £740 | £606 | £528 | £477 | £443 | £333 |
| 5% | £791 | £660 | £585 | £537 | £505 | £417 |
| 6% | £844 | £716 | £644 | £600 | £570 | £500 |
| 7% | £899 | £775 | £707 | £665 | £639 | £583 |
For the purpose of 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 on to a different rate or move from a fixed or discounted deal on to the lender’s standard variable rate (SVR).
Factors that affect monthly repayments
Here are some of the key criteria that could have an impact – both directly and indirectly – on your mortgage repayments:
Interest rates
The rate you secure will influence the monthly cost. Everything else being the same, a higher interest rate will mean you pay more for a £100k mortgage monthly. The rates available on the market can vary. So, dealing with a lender who’ll offer the most competitive rate for your circumstances is crucial.
Fixed or Tracker
You’ll also have the option to choose between a fixed rate vs a tracker mortgage. Usually, a fixed rate will be higher, increasing your monthly repayment. But, locking in a rate can allow you to better plan your finances.
Term Length
How long you take out a mortgage for can affect your rates and directly impact your monthly cost for a £100k loan. A longer term will likely reduce your monthly repayments, but it usually means paying more over the life of the mortgage.
Your age
Although getting a mortgage at almost any age is possible, time on your side can lead to better deals from lenders. This could mean lower rates and monthly repayments for your £100,000 mortgage.
The role your credit score plays
It’s worth downloading all your credit reports before applying for a mortgage because these scores can make a difference to the number of lenders willing to consider your application and indirectly affect the rates you’ll be offered. Your broker can help with any mistakes and show you areas to improve. If you do have bad credit, specialist lenders will still be available.
If you’re unsure what your credit score is or want to check before you go any further, use the free tool below:
Other mortgage costs to consider
There are a few other additional charges to think about that may impact the monthly costs when setting up a mortgage worth £100,000:
- Product fees: Some mortgages come with fees to set up. These can include a booking fee, an arrangement fee, and a valuation fee. If you include these costs in your total loan, it can mean nothing to pay upfront, but it will increase your monthly payment.
- Insurance: You will likely need to consider the additional costs of any insurance you may have to purchase. This can include building insurance, life insurance to cover the mortgage if you die, income protection if you’re unable to work, or critical illness cover to help if you get diagnosed with a serious condition.
- Stamp duty: Depending on the value of the home and if it’s your main residence, you might have to pay stamp duty. If you’re a first-time buyer or if it’s a residential property under £250,000 – this tax won’t apply.
- Legal fees: These costs usually need to be paid during the purchase process, so they won’t affect the monthly payments, but they are an additional cost to factor into your calculations.
Why Use OnlineMortgageAdvisor?
No matter your mortgage situation, we’ve got you covered. Our mortgage experts support you from the start to the finish of your application. Our specialists can search the market to find the best deal on a £100,000 mortgage for you.
With access to hundreds of lenders, your dedicated mortgage adviser can find the best possible mortgage deal for your circumstances. We’re so confident in our service that we guarantee it – if you find a better mortgage deal elsewhere, we’ll give you £100*.
Call 0330 818 7026 or make an enquiry for a free consultation, and a member of our team will explain exactly how we can help
FAQs
Yes, this is possible. You’d still need to meet the lender’s eligibility criteria and pass the affordability checks. The deposit requirements can also be higher. But, providing you find a property and qualify, a £100,000 buy-to-let (BTL) mortgage can be arranged.
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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 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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