If you earn £100,000 a year, a mortgage of around £400,000 to £450,000 can be a useful starting estimate based on income multiples of 4 to 4.5 times salary. Some eligible higher earners may be able to borrow £500,000, £550,000 or potentially £600,000, although higher income multiples are subject to lender criteria and affordability.
For someone earning £100k+, however, salary alone doesn’t always tell the full story. Your deposit, debts, regular expenditure and mortgage term can affect affordability, while bonuses, commission, RSUs, partnership profits and other income can be treated very differently between lenders.
This guide explains how much you could potentially borrow on a £100,000 salary, what could increase or reduce your mortgage affordability and how different income structures can affect the lenders and mortgage options available to you.
Quick Answer
On a £100,000 salary, the following figures provide a simple illustration of potential mortgage borrowing:
- 4x income: £400,000
- 4.5x income: £450,000
- 5x income: £500,000
- 5.5x income: £550,000
- 6x income: £600,000
Higher income multiples aren’t available to every borrower and these figures aren’t guaranteed borrowing amounts. Your actual mortgage will depend on the lender’s affordability assessment, your deposit and LTV, debts, expenditure, mortgage term, credit profile and how your income is structured.
Want to see what you could actually borrow? Use our mortgage affordability calculator for an initial estimate, or speak to an Oportfolio mortgage adviser to compare your circumstances against lender affordability criteria.
How Do Mortgage Lenders Calculate Borrowing on a £100k Salary?
Mortgage lenders don’t simply multiply your salary by a fixed number. They carry out an affordability assessment based on your income and wider financial circumstances.
This can include:
- Basic salary
- Bonuses, commission and overtime
- Existing loans and credit commitments
- Regular household expenditure
- Dependants and childcare costs
- Deposit and loan-to-value (LTV)
- Mortgage term
- Credit history
- Other income the lender is prepared to accept
For someone earning a straightforward £100,000 basic salary, different income multiples would produce the following illustrative figures:
| Income multiple (rule-of-thumb) | Approx Loan | ||||
|---|---|---|---|---|---|
| 4x | £400,000 | ||||
| 4.5x | £450,000 | ||||
| 5.0x | £500,000 | ||||
| 5.5x | £550,000 | ||||
| 6.0x | £600,000 |
These calculations are useful for understanding the numbers, but they aren’t mortgage offers. Higher income multiples are generally subject to additional lender criteria and affordability requirements.
This is why two people earning the same £100,000 salary may not necessarily be able to borrow the same amount.
How Does My Deposit Affect a Mortgage on £100k?
Your deposit doesn’t simply determine how much cash you contribute towards the purchase. It also determines your loan-to-value (LTV), which can affect the mortgage products and rates available to you.
For example, if you wanted to buy a £500,000 property:
| Deposit | Mortgage Required | LTV |
|---|---|---|
| £25,000 | £475,000 | 95% |
| £50,000 | £450,000 | 90% |
| £75,000 | £425,000 | 85% |
| £100,000 | £400,000 | 80% |
| £125,000 | £375,000 | 75% |
A larger deposit reduces the amount you need to borrow and can give you access to different LTV bands and mortgage products.
However, having a large deposit doesn’t automatically mean a lender will offer a higher income multiple. Your mortgage still needs to pass the lender’s affordability and eligibility requirements.
What If My £100k Income Includes Bonus or Commission?
Many professionals earning £100k+ receive part of their total income through annual bonuses, commission or profit-related pay.
Mortgage lenders can treat this variable income differently. Depending on the lender and your circumstances, they may consider factors such as how long you’ve received the income, how frequently it is paid, whether it has fluctuated and what evidence is available.
This means two lenders could arrive at different affordability figures for the same applicant.
For example, someone earning a £70,000 basic salary plus £30,000 of regular bonus or commission may not necessarily be assessed in the same way as someone earning a £100,000 basic salary.
If a significant part of your earnings is variable, choosing a lender whose criteria suit your income structure can therefore make a meaningful difference to your borrowing potential.
Can RSUs and Equity Income Be Used for a Mortgage?
Potentially, but lender approaches to Restricted Stock Units (RSUs), share awards and other equity-based remuneration vary.
This can be particularly relevant for people working in technology, finance and senior corporate roles, where a substantial proportion of total compensation may be received outside basic salary.
Some lenders may be able to consider qualifying vested equity where there is an appropriate track record and supporting evidence, while other lenders may not include it in their affordability calculation.
If your basic salary is £100,000 but your overall remuneration is significantly higher because of RSUs or share awards, it can therefore be important to establish which lenders are prepared to consider your particular income structure before making an application.
What If I’m Self-Employed and Earn £100k?
If you’re a company director, LLP partner, consultant or self-employed professional earning around £100,000, lenders may calculate your income differently from an employed applicant.
Depending on your circumstances and the lender, relevant income could include:
- Salary and dividends
- Salary and a share of company profit
- Partnership or LLP profit
- Retained profits
- Sole trader net profit
Lenders can also differ in the number of years’ accounts they require and how they treat rising or fluctuating income.
This means the figure shown on a generic mortgage calculator may not reflect your full borrowing potential if your income is structured through a business.
For company directors, partners and other self-employed high earners, matching the application to a lender that understands the income structure can be particularly important.
How Much House Can I Afford on a £100k Salary?
Your potential property budget is determined by the mortgage available to you plus your deposit.
For example:
| Potential Mortgage | Deposit | Illustrative property budget |
|---|---|---|
| £400,000 | £50,000 | £450,000 |
| £450,000 | £50,000 | £500,000 |
| £500,000 | £100,000 | £600,000 |
| £550,000 | £100,000 | £650,000 |
| £600,000 | £150,000 | £750,000 |
These are illustrations rather than indications that a particular mortgage amount will be available. You’ll also need to allow separately for purchasing costs such as Stamp Duty Land Tax, legal fees, surveys and moving costs.
For buyers in London and other higher-value areas, a £100,000 salary can still leave a gap between mortgage affordability and the price of the property you want to buy. A larger deposit, joint application or a lender able to consider more of your qualifying income may change the options available.
What If Our Joint Income Is £100,000?
If you’re applying jointly and your combined income is £100,000, the same basic income-multiple calculations can provide a starting point, but the result won’t necessarily be identical to a single applicant earning £100,000.
A lender will assess both applicants’ income and financial commitments. For example, existing loans, credit cards, childcare costs or other regular expenditure belonging to either applicant can affect the overall affordability calculation.
The type of income each applicant receives can matter too. A couple earning £50,000 each in basic salary may be assessed differently from a couple where one earns £70,000 basic salary and the other receives £30,000 through self-employed or variable income.
If you’re buying jointly, the useful question isn’t simply what multiple the lender offers, but how much that particular lender will actually allow you to borrow based on both applicants’ circumstances.
Why Can Someone Earning £100k Still Be Declined for a Mortgage?
Earning £100,000 doesn’t guarantee that a mortgage application will be approved.
Potential issues can include:
- High existing debts or credit commitments
- Significant regular expenditure
- A smaller deposit or higher LTV
- Variable income that doesn’t meet the lender’s criteria
- A short self-employed trading history
- Credit-history issues
- The property not meeting the lender’s requirements
- Applying to a lender whose affordability model doesn’t suit your circumstances
Two lenders can assess the same £100,000 income differently, particularly where bonuses, commission, RSUs, self-employed income or significant financial commitments are involved.
If one lender’s affordability calculation doesn’t produce the mortgage you need, that doesn’t necessarily mean every lender will reach the same figure. However, any alternative application will still need to meet the new lender’s affordability, credit and eligibility requirements.
Can I Get a £500,000 Mortgage on a £100k Salary?
Potentially. A £500,000 mortgage represents 5 times a £100,000 annual income.
Some lenders can consider borrowing at this level for eligible applicants, but earning £100,000 doesn’t automatically mean you’ll qualify for a £500,000 mortgage.
Your actual borrowing will depend on factors including your deposit and LTV, debts, expenditure, mortgage term, credit profile and the lender’s affordability criteria.
If some of your £100,000 income comes from bonus, commission or other variable pay, the lender’s treatment of that income can also affect whether £500,000 is achievable.
Can I Borrow £550,000 on a £100k Salary?
Potentially. A £550,000 mortgage represents 5.5 times a £100,000 annual income.
Some UK mortgage lenders have higher loan-to-income propositions for eligible borrowers, which can make borrowing at this level possible in certain circumstances.
However, higher income multiples are not available to everyone. Eligibility can depend on factors such as income, deposit and LTV, employment or profession, mortgage size and the lender’s wider affordability assessment.
If you need £550,000 or more on a £100,000 income, it’s particularly important to establish which lenders’ affordability models and higher-income criteria fit your circumstances rather than assuming that 5.5 times income will automatically be available.
Can I Get a £600,000 Mortgage on a £100k Salary?
A £600,000 mortgage is 6 times a £100,000 annual income, so this is considerably above the traditional income multiples used as a starting point by many lenders.
Some mortgage propositions can offer higher income multiples to eligible borrowers, but the criteria can be more restrictive and the lender’s full affordability assessment still applies.
If you need to borrow £600,000 on a £100,000 income, your deposit, LTV, financial commitments, mortgage term and income structure can all become particularly important.
It may also be worth assessing whether additional qualifying income, such as regular bonus or commission, can legitimately be included in the lender’s affordability calculation rather than looking only at basic salary.
Find Out How Much You Could Borrow on a £100k+ Income
If you earn £100,000 or more, a simple salary multiple may not show you the full range of mortgage options available.
At Oportfolio Mortgages, we work with professionals, company directors, partners, contractors and self-employed applicants, including borrowers whose income includes bonuses, commission, RSUs and other variable elements.
We can assess your income, deposit, commitments and property plans against lender affordability criteria to help establish how much you could realistically borrow and which mortgage options may be suitable.
If you’re planning a purchase, moving home or remortgaging and want to understand your borrowing position before taking the next step, speak to an Oportfolio mortgage adviser.
Speak to a mortgage adviser about your £100k+ income
Not ready to speak to an adviser? Try our mortgage affordability calculator.
FAQ: £100,000 Salary Mortgage
Can I get a £500,000 mortgage on a £100k salary?
Potentially. £500,000 represents 5 times a £100,000 income. Some lenders can consider this for eligible borrowers, subject to affordability and their wider criteria.
Can I borrow 5.5 times my salary on £100k?
Potentially, although 5.5 times income isn't available to every borrower. On £100,000, 5.5 times income would equal £550,000. Eligibility will depend on the lender and your circumstances.
Can I borrow 6 times my £100k salary?
Some higher-income mortgage propositions can offer larger income multiples to eligible applicants. Six times £100,000 would equal £600,000, but this should be treated as a theoretical calculation rather than a guaranteed mortgage amount.
What house can I afford on a £100k salary?
That depends on both your mortgage and deposit. For example, a £450,000 mortgage plus a £50,000 deposit would provide an illustrative £500,000 property budget before allowing for Stamp Duty, legal fees and other purchasing costs.
Do bonuses and commission count towards a mortgage?
They can. Different lenders have different approaches to variable income and may consider factors such as your track record, frequency of payment and evidence available.
Can RSUs count towards mortgage affordability?
Potentially. Some lenders can consider certain equity-based remuneration where their criteria are met, while others may not include it. This can make lender selection particularly important for borrowers with significant RSU income.
Does a larger deposit mean I can borrow more on a £100k salary?
Not necessarily. A larger deposit reduces your LTV and may give you access to different mortgage products, but the amount you can borrow will still depend on the lender's affordability assessment and eligibility criteria.
