To borrow £600,000, you would typically need a household income of around £133,333 if a lender offered 4.5 times your income. At 4 times income, you would need £150,000, while a lender willing to consider 5 times income could potentially lend £600,000 on an income of £120,000.
However, income multiples are only a starting point. At this level of borrowing, your deposit, existing financial commitments, mortgage term, credit profile and the way you earn your income can all have a significant impact on how much a lender is prepared to offer.
This can be particularly important for higher-earning professionals whose income does not fit neatly into a conventional employed salary. Partners in law firms, accountancy practices and other professional partnerships, for example, can be assessed differently between lenders depending on how their income and employment status are treated.
What this guide will show you
- Salary needed for a £600k mortgage at different income multiples
- Whether £600k could be achievable on incomes from £100k to £150k
- How lenders assess larger mortgage applications
- How professional partnership income can be treated
- What deposit and loan-to-value mean when borrowing £600,000
- A real £600k mortgage case handled by Oportfolio
- How much a £600k repayment mortgage could cost each month
What salary do I need for a £600k mortgage?
Income multiples of around 4–4.5 times income are a useful starting point when estimating how much you might be able to borrow, although some lenders can consider higher multiples for eligible borrowers.
Here’s the typical guide:
| Income multiple (rule-of-thumb) | Approx salary needed (single or joint household income) | ||||
|---|---|---|---|---|---|
| 4.0x | £150,000 | ||||
| 4.5x | £133,333 | ||||
| 5.0x | £120,000 | ||||
| 5.5x | £109,091 | ||||
| 6.0x | £100,000 |
These figures are illustrative. A lender offering a particular income multiple does not guarantee that £600,000 will be available, as borrowing will depend on its full affordability assessment and lending criteria.
Can you afford a £600k mortgage?
Mortgage affordability isn’t determined by salary alone. Your deposit, existing financial commitments, mortgage term, credit profile and income structure can all affect how much you can borrow.
Use our How Much Can I Borrow Calculator for an initial indication, or speak to one of our advisers if you want us to assess your circumstances against relevant lender criteria.
Why the income multiple is only a starting point
An income multiple provides a useful initial estimate of borrowing capacity, but it doesn’t determine how much a lender will ultimately be prepared to offer.
When assessing a £600,000 mortgage application, lenders can also consider:
- Total household income
- How that income is earned and structured
- Bonus, commission and other variable income
- Existing loans, credit cards and other commitments
- Dependants and regular household expenditure
- Mortgage term
- Deposit and loan-to-value
- Credit profile
- Existing properties or mortgages
At higher loan sizes, lender criteria can also differ around maximum loan amounts and how particular types of income are treated. This means two applicants with the same headline income can receive very different borrowing figures.
What does a £600k mortgage actually mean?
A £600k mortgage refers to the amount you borrow, rather than the price of the property you’re buying.
For example:
- £631,579 property + approximately £31,579 deposit = £600,000 mortgage (95% LTV)
- £666,667 property + approximately £66,667 deposit = £600,000 mortgage (90% LTV)
- £750,000 property + £150,000 deposit = £600,000 mortgage (80% LTV)
The resulting loan-to-value can affect the mortgage products and interest rates available. Generally, increasing your deposit reduces the LTV, although the lender will still need to establish that the £600,000 mortgage itself is affordable.
How much deposit do I need if I want a £600k mortgage?
The deposit required depends on the property value and the loan-to-value available to you. Because £600,000 refers to the mortgage amount rather than the purchase price, a 5% deposit does not simply mean £30,000.
A lower deposit generally means borrowing at a higher LTV, while a larger deposit reduces the proportion of the property’s value you need to finance.
A lower LTV can potentially provide access to a wider range of mortgage products and rates, but affordability remains separate: the lender must still be satisfied that the £600,000 mortgage itself is affordable based on your income and financial circumstances.
How lenders assess affordability for a £600k mortgage
For a £600,000 mortgage, lenders will usually look beyond a headline salary figure and assess the wider financial picture.
Income
Depending on the applicant and lender, eligible income could include:
- Basic salary
- Bonus or commission
- Partnership income
- Self-employed profits
- Contractor income
- Other sustainable sources of income
The way income is assessed can be particularly important for professionals whose remuneration does not fit a straightforward PAYE salary.
Financial commitments
Lenders can also consider:
- Personal loans
- Car finance
- Credit card balances
- Childcare or school fees
- Existing property commitments
- Other regular expenditure
This means even a high-income applicant can receive a lower borrowing figure if their financial commitments materially reduce affordability.
Can I get a £600k mortgage on my salary?
Comparing £600,000 with your household income provides a useful indication of the income multiple that would be required. The amount actually available will still depend on the lender’s full affordability assessment.
Can I get a £600k mortgage on £100k?
A £600,000 mortgage on a £100,000 income would require borrowing of exactly 6 times income.
This is a high income multiple and will not be available to every applicant. Some lenders can consider higher multiples for eligible borrowers, but your income structure, existing commitments, deposit, mortgage term and overall affordability would all need to support this level of borrowing.
Can I get a £600k mortgage on £110k?
A £600,000 mortgage on a £110,000 income would require borrowing of approximately 5.45 times income.
Some lenders can consider borrowing at this level for eligible applicants, although the lender’s full affordability assessment will determine the amount available.
Can I get a £600k mortgage on £120k?
A £600,000 mortgage represents exactly 5 times a £120,000 income.
Some lenders can consider borrowing at this level where their eligibility and affordability requirements are met. The way your income is earned can also become particularly important at this borrowing level.
Can I get a £600k mortgage on £135k?
A £600,000 mortgage represents approximately 4.44 times a £135,000 income.
This sits within the broad income-multiple range considered by many lenders, although your financial commitments, income structure and other circumstances will still influence the amount available.
Can I get a £600k mortgage on £150k?
A £600,000 mortgage represents exactly 4 times a £150,000 income.
This provides a stronger starting point from an income-multiple perspective, but the lender will still complete its full affordability and eligibility assessment.
How do lenders assess partners in law firms and professional practices?
Partners in law firms, accountancy firms and other professional practices can present a more complex mortgage application because lenders do not always categorise their income in the same way.
Depending on the structure of the partnership and the lender’s criteria, an applicant may be assessed using an approach more commonly associated with self-employed borrowers, while another lender may take a different view of the same income.
The lender may consider factors such as partnership income, historic earnings, supporting documentation and the stability of the professional practice.
This can result in different usable income figures and therefore different borrowing amounts, even where the applicant’s headline annual earnings are substantial.
For someone looking to borrow £600,000, choosing a lender whose criteria are suited to professional partnership income can therefore be particularly important.
A real £600k mortgage case handled by Oportfolio
Property value: £999,000
Deposit: £399,000
Mortgage required: £600,000
Income: £200,000
Application: Single applicant
Buyer type: Home mover
Income type: Partner in a law firm
The challenge
The client was a partner in a law firm earning approximately £200,000 a year and wanted to borrow £600,000 towards the purchase of a £999,000 property.
The complexity was not simply the amount they earned, but how lenders interpreted their employment and income structure.
Depending on the lender’s criteria, a law firm partner can be assessed differently from a conventional salaried employee. Some lenders approached the client’s circumstances on a self-employed basis, which resulted in a lower usable income figure and restricted the amount they could borrow.
How Oportfolio helped
We assessed the client’s income structure against lenders with different approaches to professional partnership income.
We identified a lender whose criteria allowed more of the client’s income to be taken into account for affordability than would have been available through lenders assessing them using a more conventional self-employed approach.
This resulted in a higher borrowing figure and enabled the client to obtain the mortgage they required.
The outcome
The client was able to secure the required £600,000 mortgage and proceed with the purchase of their new home.
This case demonstrates why high earnings alone don’t necessarily determine mortgage affordability. For partners in law firms and other professional partnerships, the way a lender categorises and assesses income can materially affect the amount available.
Is a £600k mortgage assessed differently from a smaller mortgage?
There is no single point at which every lender starts treating a mortgage as a “large loan”, but loan size can influence which lenders and products are suitable.
A lender that is competitive for a smaller mortgage may not necessarily be the most suitable option for £600,000 borrowing. Maximum loan sizes, loan-to-value limits, affordability models and the treatment of higher or more complex incomes can all vary.
For this reason, larger mortgage applications can benefit from assessing both affordability and lender criteria before focusing solely on the headline interest rate.
Ways to improve your mortgage affordability
If your initial affordability falls short of £600,000, there are several areas that may be worth exploring depending on your circumstances:
- Reduce existing credit commitments where appropriate
- Consider whether a longer mortgage term is suitable
- Make sure all eligible sources of income are being considered
- Explore lenders whose criteria suit your income structure
- Consider a joint application where appropriate
- Increase your deposit if doing so reduces the amount you need to borrow
Because lender affordability models differ, selecting a lender whose criteria suit your circumstances can make a significant difference at higher borrowing levels.
How much does a £600k mortgage cost per month?
The monthly repayment on a £600,000 mortgage will depend on the interest rate and mortgage term.
| Interest Rate | 25-Year Term | 30-Year Term | 35-Year Term |
|---|---|---|---|
| 4% | £3,167 | £2,864 | £2,657 |
| 4.5% | £3,335 | £3,040 | £2,839 |
| 5% | £3,508 | £3,221 | £3,028 |
| 5.5% | £3,684 | £3,407 | £3,222 |
| 6% | £3,866 | £3,597 | £3,421 |
Figures are illustrative and assume a £600,000 capital-and-interest repayment mortgage with the interest rate remaining unchanged throughout the term. They do not include fees or other costs. Actual mortgage rates and repayments will vary.
You can use our Mortgage Repayment Calculator to compare different mortgage amounts, rates and terms.
Next step: Find out how much you could borrow
A salary multiple provides a useful estimate, but the amount you can actually borrow will depend on the lender’s affordability assessment.
Use our How Much Can I Borrow Calculator to get an initial indication based on your circumstances.
If you’re considering a mortgage of around £600,000, book an affordability review with Oportfolio Mortgages and we’ll assess your income, deposit and financial commitments against relevant lender criteria.
Looking at a different mortgage amount?
- £200k mortgage salary guide
- £300k mortgage salary guide
- £400k mortgage salary guide
- £500k mortgage salary guide
- £700k mortgage salary guide
- £800k mortgage salary guide
- £900k mortgage salary guide
FAQ: What Salary Do I Need for a £600k Mortgage in the UK?
Can I get a £600k mortgage on £100k salary?
A £600,000 mortgage on a £100,000 income would require borrowing of exactly 6 times income. Some lenders can consider higher income multiples for eligible applicants, but this level of borrowing will not be available to everyone and will depend on the lender's affordability and eligibility criteria.
Can I get a £600k mortgage on a £120k salary?
A £600,000 mortgage represents exactly 5 times a £120,000 income. Some lenders can consider borrowing at this level where their affordability and eligibility requirements are met, although the amount available will depend on your individual circumstances.
How much deposit do I need if I want a £600k mortgage?
The deposit required depends on the value of the property because £600,000 refers to the mortgage amount rather than the purchase price. For example, if a £600,000 mortgage represented 80% of the property's value, the property would cost £750,000 and the deposit would be £150,000.
Can two people combine their salaries for a £600k mortgage?
Yes. With a joint application, lenders can usually consider both applicants' incomes when assessing affordability. For example, two applicants earning £70,000 each would have combined household income of £140,000, making a £600,000 mortgage approximately 4.29 times their combined income. Both applicants' financial commitments and circumstances will also be assessed.
Can a law firm partner get a £600k mortgage?
Potentially, yes. Partners in law firms and other professional practices can obtain larger mortgages, but lenders differ in how they categorise and assess partnership income. The income figure used for affordability can therefore vary between lenders even where the applicant's headline earnings are the same.
Can I get a £600k mortgage if I'm self-employed?
Yes. Self-employed applicants can obtain £600,000 mortgages, although lenders differ in how they assess income. Depending on the applicant's business structure and circumstances, different measures of income and supporting financial information may be considered.
How much would a £600k mortgage cost per month?
At an illustrative rate of 5%, a £600,000 capital-and-interest repayment mortgage would cost approximately £3,508 per month over 25 years, £3,221 over 30 years or £3,028 over 35 years. Actual mortgage rates and repayments will vary, and fees and other costs should also be considered.
