In London, many lenders use 4 to 4.5 times your gross annual income as a starting point for how much you can borrow. Some lenders may consider higher multiples in specific circumstances, including for higher earners, certain professionals, and applicants with larger deposits. Your actual borrowing will depend on a full affordability assessment of your income, outgoings, debts, and deposit. This guide explains how that works in practice, with worked examples at London price points.
One of the first questions anyone asks when thinking about buying in London is: how much can I actually borrow? In London, that question has particular weight. Property prices across the capital are higher than in most UK markets, and the gap between what standard lending criteria allow and what the market requires is wider than almost anywhere else.
This guide explains how mortgage affordability works in practice, with worked examples using London price ranges. For an overview of our London mortgage services, see our London mortgage services page. Written by the mortgage brokers at Fitch & Fitch — an independent, whole-of-market brokerage with offices in Canary Wharf, Cambridge and Colchester — it is designed to give you a realistic picture of what you could borrow, what you could buy with it, and where higher income multiples or specialist lending criteria might make a difference.
How Lenders Decide What You Can Borrow
There is no single formula that every lender uses. The process typically involves two elements working together: an income multiple and a detailed affordability assessment.
Income Multiples
Many high street lenders offer in the region of 4 to 4.5 times your gross annual income. This is the starting point, not the final answer. Some lenders may consider higher multiples in specific circumstances, subject to strict criteria and a full affordability assessment. The availability of these products varies between lenders and can change.
Affordability Assessment
Alongside the income multiple, every lender conducts an affordability assessment. This looks at your monthly outgoings in detail: existing debts such as student loan repayments, car finance, and credit cards; regular commitments including childcare, school fees, and maintenance payments; and your general living costs. The lender then stress-tests your ability to keep up repayments if interest rates were to rise.
Two people earning the same salary can be offered very different mortgage amounts depending on their individual expenditure. This is why an income multiple alone is never the full picture.
Other Factors That Affect Your Borrowing
Deposit size. A larger deposit reduces the lender’s risk, which can unlock both higher borrowing and better interest rates. The difference between a 5% and 15% deposit can be significant — and at London prices, building that deposit is itself a major challenge.
Credit history. A clean credit record gives lenders confidence. Missed payments, defaults, or CCJs can reduce the amount offered or limit the lenders willing to consider your application. Specialist lenders do exist for applicants with adverse credit.
Property type. Some property types — such as high-rise flats, non-standard construction, properties with EWS1 cladding issues, short leases, or high ground rents — carry restrictions with certain lenders, which can affect the maximum loan available. In London, where the majority of transactions involve leasehold flats, this is worth checking early.
Your age and mortgage term. Most lenders have a maximum age at the end of the mortgage term, though some extend further. A shorter available term can reduce the amount you can borrow because monthly repayments would need to be higher.
How Much Could You Borrow? Worked Examples for London
The following table shows indicative borrowing ranges at different income levels, using the standard 4.5 times income as a baseline. These figures assume typical living expenses with no significant existing debts. In practice, your actual borrowing will depend on a full affordability assessment of your individual circumstances. The London column shows what that budget realistically buys across the capital.
| Annual income | At 4.5x income | What this buys in London | Deposit needed (10%) |
| £40,000 | £180,000 | Shared ownership only at most London price points | £20,000 |
| £50,000 (or £25k + £25k joint) | £225,000 | Shared ownership; very limited outer London options | £25,000 |
| £60,000 (or £30k + £30k joint) | £270,000 | Shared ownership; some outer London studios or one-bed flats | £30,000 |
| £80,000 (or £40k + £40k joint) | £360,000 | One and two-bed flats in outer London boroughs (Barking, Bexley, Havering, Sutton) | £40,000 |
| £100,000 (or £50k + £50k joint) | £450,000 | Two-bed flats in mid-tier boroughs; houses in outer London | £50,000 |
| £120,000 (or £60k + £60k joint) | £540,000 | Two and three-bed flats in inner boroughs; houses in Greenwich, Lewisham, Walthamstow | £60,000 |
| £150,000+ | £675,000+ | Three-bed family homes across mid-London; flats in prime inner boroughs | £75,000+ |
| £200,000+ | £900,000+ | Larger family homes; flats in prime central London. Private bank lending often relevant above £1m | £100,000+ |
Important: the figures above are illustrative and assume standard lending criteria with typical living expenses. Your actual borrowing will depend on your monthly outgoings, existing debts, and a full affordability assessment. A broker can give you a personalised figure based on your specific circumstances.
The £500,000 First-Time Buyer Stamp Duty Cliff
In London, first-time buyers face a specific affordability consideration that does not apply in most other UK cities: a significant portion of properties suitable for first-time buyers are priced above £500,000, the ceiling at which first-time buyer stamp duty relief is lost entirely.
First-time buyers pay no stamp duty on the first £300,000, and a reduced 5% rate on the portion from £300,001 to £500,000. Above £500,000, first-time buyer relief disappears entirely and standard rates apply from £0. Rightmove reported in April 2026 that London first-time buyers paid 53% of the £307 million in additional SDLT paid nationally since the temporary relief ended in April 2025 (Rightmove, April 2026).
This creates a meaningful cost differential at the boundary. A first-time buyer purchasing at £499,000 pays £9,950 in stamp duty. A first-time buyer purchasing at £510,000 pays £15,500 — an increase of over £5,500 for a £11,000 higher purchase price. A broker who flags this early can help you consider whether keeping the purchase price below £500,000 is realistic. For worked examples at London price points, see our London stamp duty guide.
Can You Borrow More Than 4.5 Times Your Income?
Yes, in certain circumstances. While 4.5 times income remains the standard benchmark used by many high street lenders, some lenders offer higher multiples for applicants who meet their specific criteria. In London, where the gap between standard borrowing and average prices is wider than in most UK markets, higher multiples are often a central part of how buyers access the market.
Who May Qualify for Higher Multiples?
Higher earners. Some lenders may consider higher multiples for applicants earning above a certain threshold, subject to their individual criteria and affordability assessment.
Certain professionals. Some lenders have specific criteria for certain professions. Applicants in these categories may be considered for enhanced multiples, though availability varies and is always subject to affordability.
First-time buyers. Some lenders have introduced products specifically for first-time buyers that may allow higher borrowing, recognising the affordability challenge of getting onto the property ladder.
Larger deposits. A deposit of 15% to 20% or more can open up higher income multiples with some lenders, as the loan-to-value risk is reduced.
Some of these products are not shown on comparison sites and lender criteria varies. A broker can help you understand which options may be available to you.
What This Means in Practice
To illustrate: a household earning £100,000 could borrow £450,000 at 4.5 times income. If a lender assessed them at a higher multiple based on their individual circumstances, this could increase to £500,000 or more, depending on affordability. In London, that difference can move a buyer from a two-bed flat in an outer borough into a wider range of properties across mid-London.
For a household on £150,000, the gap is more significant. At 4.5x, borrowing is £675,000. At a higher multiple, it could reach £750,000—£825,000 depending on lender criteria and affordability — opening up a materially broader range of London properties.
Borrowing With City or Complex Income
London has a higher concentration of buyers with complex income structures than any other UK market. If your income includes any of the following, the way lenders assess your borrowing is different from a standard PAYE applicant — and the lender you choose matters considerably.
Bonus income. Many lenders will consider bonus income alongside base salary, but the treatment varies. Some take 100% of the most recent bonus; others average over two or three years; others apply a percentage. A broker who understands how different lenders treat bonus income can often identify a lender that produces a higher borrowing figure for your specific bonus structure.
Restricted Stock Units (RSUs) and equity compensation. RSUs at vest are recognised as income by some lenders and excluded by others. The treatment of unvested RSUs, stock options, and carried interest (common in private equity and hedge funds) varies considerably. These are routine considerations for London buyers but require careful lender selection.
Self-employed and company directors. Sole traders are assessed on net profit from SA302 tax calculations. Limited company directors are typically assessed on salary plus dividends, though some lenders will also consider retained profits, which can significantly increase borrowing power. Most lenders require two to three years of trading history.
Contractors and day-rate workers. Some lenders will calculate income based on the day rate multiplied across the working year rather than relying solely on tax returns. For a contractor on £700 per day, for example, this could produce an annualised income figure of around £168,000 — potentially supporting substantially higher borrowing than SA302 figures alone. Day-rate and contract working is common across London’s financial, technology and professional services sectors.
International and non-UK resident buyers. Foreign-currency income, non-UK tax residence, and Skilled Worker visa status all affect which lenders will consider your application. The pool of lenders narrows considerably for non-UK residents. A broker experienced with international buyers can identify lenders with suitable criteria. For more detail, see our international buyer guide.
For more on how lenders assess self-employed and complex income, see our London self-employed mortgage guide.
Joint Applications: How Two Incomes Change the Calculation
For joint applications, lenders combine both incomes and apply the income multiple to the total. In London, where single-income buyers face a significant affordability gap, joint applications are a primary route into the market for many buyers.
| Applicant 1 | Applicant 2 | Combined income | Borrowing at 4.5x |
| £30,000 | £30,000 | £60,000 | £270,000 |
| £40,000 | £35,000 | £75,000 | £337,500 |
| £50,000 | £40,000 | £90,000 | £405,000 |
| £50,000 | £50,000 | £100,000 | £450,000 |
| £60,000 | £50,000 | £110,000 | £495,000 |
| £80,000 | £60,000 | £140,000 | £630,000 |
| £100,000 | £75,000 | £175,000 | £787,500 |
Both applicants will need to pass credit checks and afford the repayments based on their total committed outgoings. All existing debts and outgoings for both applicants are factored into the affordability assessment.
How Your Deposit Affects What You Can Borrow
Your deposit does not directly change the income multiple a lender applies, but it affects the overall picture in two important ways. First, a larger deposit means you need to borrow less for the same property. Second, a lower loan-to-value ratio often unlocks better interest rates, which improves your affordability assessment.
Here is how different deposit levels work at London price points:
| Property value | 5% deposit | 10% deposit | 15% deposit | 20% deposit |
| £400,000 | £20,000 | £40,000 | £60,000 | £80,000 |
| £500,000 | £25,000 | £50,000 | £75,000 | £100,000 |
| £600,000 | £30,000 | £60,000 | £90,000 | £120,000 |
| £750,000 | £37,500 | £75,000 | £112,500 | £150,000 |
| £1,000,000 | £50,000 | £100,000 | £150,000 | £200,000 |
At London prices, a 10% deposit represents a significant sum. Building or accessing the deposit is often the primary constraint for London buyers, particularly first-time buyers. For more on deposit strategies in London, see our London deposit guide.
What Can You Actually Buy in London?
Knowing your borrowing figure is most useful when you understand what it buys locally. London is a range of very different markets within one city, and prices vary significantly by borough, property type, and street. For area-by-area guidance on where different budgets reach across the capital, see our London property guide.
Shared Ownership in London
For some London buyers, shared ownership may provide an alternative route into the market, particularly at lower income levels where standard borrowing does not bridge the gap to open-market prices. For detail on how shared ownership mortgages work in London, including the income cap and lender pool, see our dedicated guide.
Practical Steps to Increase What You Can Borrow
Reduce existing debts before applying. Paying down credit cards, personal loans, or car finance directly improves your affordability assessment. Even reducing a credit card balance by a few thousand pounds can make a measurable difference.
Save a larger deposit. Moving from a 5% to a 10% deposit — or from 10% to 15% — can open up better rates and higher multiples with some lenders. At London prices, every percentage point of additional deposit represents a meaningful sum and a meaningful improvement in your mortgage options.
Extend your mortgage term. A longer mortgage term reduces your monthly repayments, which improves your affordability assessment. A 30 or 35-year term is now common for London first-time buyers and can increase the amount a lender is willing to offer.
Use a broker to access higher multiples. Some lenders have criteria that are not published on comparison sites. A broker can help identify which lenders may be suitable for your circumstances and how to present your application. In London, where higher multiples are more commonly needed and income structures are more varied, this often makes a material difference. For more on how brokers work, see our guide.
Check your credit report early. Errors on your credit file can reduce your borrowing without you knowing. Check your report with Equifax, Experian, and TransUnion at least three months before applying, and address any issues.
Consider a joint application. Buying with a partner or family member combines incomes and can substantially increase your borrowing power. Some lenders also offer guarantor or family-assisted mortgage products where a parent’s income or property supports the application.
London Affordability in Context
For many London buyers, standard income multiples can create a gap between borrowing capacity and property prices, which is why deposit size and lender selection often become particularly important. This is one reason why lender selection and specialist criteria can become more relevant for many London buyers. A broker who understands the London affordability picture can help you understand your realistic borrowing range before you begin your property search.
Why We Wrote This Guide
Fitch & Fitch is an independent, whole-of-market mortgage broker with offices in Canary Wharf, Cambridge, and Colchester. We are an appointed representative of JLM Mortgage Network, authorised and regulated by the Financial Conduct Authority (FCA Registration Numbers 955014 and 300629). You can verify this on the FCA Register at register.fca.org.uk.
Fitch & Fitch has received recognition from independent industry bodies including the Mortgage Strategy Awards, Mortgage Introducer Awards, and Legal & General Mortgage Club Awards. These awards are judged independently and can be verified on the respective awards websites.
Our London office is in Canary Wharf, and meetings are available by appointment. We advise clients across all London boroughs on everything from first-time buyer affordability assessments to complex income packaging, joint applications, shared ownership, and higher-value transactions. We wrote this guide because we believe an informed borrower makes better decisions. For further information about our London mortgage services, visit our London hub page.
Frequently Asked Questions
What salary do I need for a £450,000 mortgage in London?
At the standard 4.5 times income multiple, a £450,000 mortgage requires a household income of £100,000. Some lenders may consider higher multiples for applicants who meet their specific criteria, which could allow a lower income to support this borrowing in the right circumstances. Your actual borrowing will depend on your outgoings, debts, and a full affordability assessment.
What salary do I need for a £300,000 mortgage?
At the standard 4.5 times multiple, a £300,000 mortgage requires a household income of approximately £67,000. In London, the property options available at this budget can vary considerably depending on location and property type. Some lenders may offer this at a lower income if you meet their criteria for higher multiples. A broker can check which options are available to you.
What salary do I need for a £250,000 mortgage?
At the standard 4.5 times multiple, a £250,000 mortgage requires a household income of approximately £56,000. In London, this budget is largely limited to shared ownership. The actual amount will depend on your outgoings, debts, and individual affordability assessment.
Can I borrow more than 4.5 times my salary?
Some lenders may consider higher multiples for applicants who meet their specific criteria. Eligibility typically depends on income level, profession, deposit size, and overall affordability. In London, higher multiples are more commonly needed and a broker can help identify which lenders may be suitable based on your circumstances.
How much do I need to earn to buy in London?
The income needed to buy in London varies significantly by property type, location, deposit size, and lender criteria. In many cases, household income, affordability assessment, and deposit size work together rather than income alone determining what is achievable. A broker can give you a realistic borrowing figure based on your specific circumstances before you begin your property search. For guidance on first-time buyer mortgage options, see our guide.
How does my bonus affect how much I can borrow?
Many lenders will consider bonus income alongside base salary, but the treatment varies significantly. Some take 100% of the most recent bonus; others average over two or three years; others apply a percentage. The lender choice matters considerably for buyers with significant bonus income, and a broker experienced with City and London professional income structures can often identify a lender that produces a better outcome for your specific circumstances.
Will a mortgage broker help me borrow more in London?
A broker cannot change your financial circumstances, but they can search across a wider range of lenders, including some whose products and criteria are not shown on comparison sites. They can also help present your application in a way that suits the lender’s criteria and ensure your case is packaged correctly. In London, where income structures are often complex and higher multiples are more commonly needed, this can make a meaningful difference. For more on how brokers work, see more on how brokers work.
Does my student loan affect how much I can borrow?
Yes. Student loan repayments are treated as a committed monthly outgoing in the lender’s affordability assessment. The impact depends on your repayment plan and current salary, and can reduce your maximum borrowing. A broker can model the exact impact for your situation.
What is an Agreement in Principle and should I get one?
An Agreement in Principle is an indication from a lender of how much they would be willing to lend, based on basic financial information and a credit check. It is not a guarantee of a mortgage offer, but it demonstrates to estate agents and sellers that you are a credible buyer. In London’s competitive market, having an AIP before you start your property search puts you in a stronger position.
Next Steps
The figures in this guide are illustrative. To understand what you could borrow based on your specific circumstances, the next step is to speak to a broker.
At Fitch & Fitch, we can review your income, expenditure, and documentation, search across the whole market, and give you a realistic borrowing figure before you start your London property search. For further information about our London mortgage services, visit our London hub page.