How Much Can I Borrow for a Mortgage? Working Out Your Real Maximum

The number a mortgage calculator gives you and the number a lender will actually lend are rarely the same. Most UK lenders start at 4 to 4.5 times gross income, then apply their own affordability model and a stressed interest rate on top. This page explains what sets your real maximum and how to move it. Mortgage One is a whole of market mortgage adviser that checks borrowing limits against live lender affordability models before an application goes in.

For a free initial consultation that turns a calculator estimate into a lender-backed borrowing figure, call 01202 155992 or contact Mortgage One.

How much can you borrow on a UK mortgage right now?

Most UK lenders start at 4 to 4.5 times gross annual income, so a £40,000 salary points to roughly £160,000 to £180,000. A smaller group stretch to 5.5 or 6 times income for higher earners with clean credit, which on the same salary would reach £240,000.

That spread is the single biggest variable in the market. The step from 4.5 to 5.5 times income on a £40,000 salary is worth £40,000 of extra buying power, and on a joint income of £70,000 the same step is worth £70,000. Which lenders will stretch, and on what conditions, is set out in the guide to mortgage income multiples.

The higher multiples are not open to everyone. Lending at or above 4.5 times income is governed by the loan-to-income flow limit, which caps that band of lending at 15% of new owner-occupier mortgages across the market as a whole. Since July 2025 individual lenders have been able to exceed that share at firm level under a modification by consent, and regulators consulted through to July 2026 on making the change permanent. The practical effect is that high-multiple products have become easier to access, but they remain rationed and criteria-led.

Nationwide is the clearest example of what that looks like on the shelf. Its 6 times income lending opened to home movers and remortgagors in January 2026, with a minimum income of £75,000 for a sole applicant or £100,000 joint for new customers, available up to 95% loan to value. On a £100,000 joint income that moves the maximum from around £550,000 to £600,000. Against an average UK house price of £271,000 in May 2026, that kind of headroom matters most in southern markets rather than nationally.

Why the calculator figure and the lender figure differ

A calculator applies one multiple to your income. A lender applies its own multiple, then subtracts committed credit, childcare, dependants and essential spending, then stress tests the payment. Two lenders looking at identical figures can land £50,000 apart, which is why the estimate is a starting range rather than an offer.

The deduction stage is where most of the gap opens up. A £300 a month car finance agreement with two years left to run is treated as a live commitment by almost every lender, and on most affordability models it removes somewhere between £12,000 and £18,000 from the maximum loan. Credit card balances are usually assessed on a notional monthly repayment rather than the actual minimum, so a £6,000 balance you clear each month can still count against you. How the whole assessment is built is covered in the guide to mortgage affordability.

The second reason for the gap is policy rather than arithmetic. Minimum income thresholds, maximum age at the end of term, acceptable property types and treatment of variable pay all sit inside mortgage lending criteria and vary lender by lender. A calculator cannot see any of it. That is why the same applicant can be quoted £280,000 by one bank and £330,000 by another in the same week, with no change to their income.

How lenders stress test your mortgage payments

Under MCOB 11.6.18R lenders must test affordability against likely interest rate rises over at least five years, using a stressed rate they set themselves. Where the initial fixed rate runs for five years or more, no stress test is required, so the same income often supports a larger loan.

That exemption is the most underused lever in the market. If a two-year fix is stress tested at, say, 7% while a five-year fix is assessed on the pay rate itself, the five-year product can support a materially larger loan on identical income. Borrowers who are tight on affordability are often solved by the term of the fix rather than by the lender.

The regulator has also pushed lenders to revisit how they set the stressed rate. In December 2025 the Financial Conduct Authority said that industry use of the flexibility already available in the rule had widened borrowing options, with many borrowers able to be offered around £30,000 more than before. Stressed rates track expectations for Bank Rate, which the Bank of England held at 3.75% at its June 2026 meeting, so the direction of the Bank of England base rate projection feeds directly into what lenders will offer.

What does your income type do to your borrowing limit?

Basic salary is used in full. Bonus, commission and overtime are often averaged over two years or capped at 50%, and some lenders ignore them. Self-employed applicants are assessed on net profit or salary plus dividends, with two to three years of accounts usually required.

For company directors the choice of lender can be worth more than the choice of rate. Some lenders count only salary plus dividends drawn, while others will use salary plus your share of retained profit. A director paying themselves £50,000 while leaving £80,000 in the company can see the assessable income treble depending on which model is applied, which is the central point of the guide to self-employed mortgages.

Other income sits on a sliding scale of acceptance. Rental income from an existing property is commonly taken at 75% of gross rent. Regular contractual overtime is usually accepted with six to twelve months of evidence, while discretionary bonuses are treated more cautiously. Pension income, child benefit and maintenance are accepted by some lenders and excluded outright by others. Foreign currency earnings narrow the field further and often attract a currency discount of 20% to 25% before the multiple is applied.

If bonus, commission or self-employed profit makes up a meaningful part of what you earn, call 01202 155992 or contact Mortgage One.

How deposit and loan to value change the maximum

Deposit sets your loan to value, and loan to value gates which products you can reach. Enhanced multiple products commonly cap at 85% or 90% loan to value, so a 5% deposit narrows the field sharply, even where your income alone would support a higher multiple.

The interaction runs both ways. Income sets the ceiling on the loan, and deposit sets the ceiling on the price you can reach. A buyer with £40,000 of deposit and a £180,000 borrowing limit is shopping at £220,000, whichever way the numbers are presented. Working out your position in the lending bands first, using the loan to value calculator, tends to be more useful than adding a few thousand to the deposit and hoping the rate tier moves.

There are exceptions worth knowing. A small number of higher-multiple schemes now reach 95% loan to value, which breaks the usual rule that the biggest multiples demand the biggest deposits. For anyone still building the deposit, the mortgage deposit guide sets out what each band realistically requires and where the pricing breakpoints sit.

What raises the amount a lender will actually offer?

Clearing committed credit is the fastest lever, because every £100 a month of loan or card payments typically removes several thousand pounds of borrowing. Extending the term also helps. On a £250,000 loan at 4.5%, moving from 25 to 35 years cuts the payment from about £1,390 to £1,183.

Term extension is a real lever but not a free one. The lower payment passes affordability more easily, and the trade is a longer run of interest and a later end date, which then has to sit inside the lender's maximum age rules. It works best when paired with a plan to overpay once income allows, using the 10% annual allowance most fixed products carry.

Three other levers move the number. Adding a second applicant brings a second income into the multiple, though it also brings their commitments and credit profile. Timing an application after a pay rise has landed in payslips, rather than before, changes the assessable figure. And cleaning up the credit file before applying widens the lender pool rather than the multiple itself. For anyone buying their first property, the first-time buyer mortgage guide sets these out alongside the deposit and scheme routes.

How much can you borrow when remortgaging or moving?

A remortgage is reassessed from scratch by a new lender, so a loan you passed for five years ago can fail today if income or commitments have changed. Product transfers with your existing lender usually skip the full affordability test, which matters when the numbers are tight.

This is the trap that catches borrowers who have become self-employed, moved to contract work, taken on childcare costs or started being paid partly in foreign currency since their last application. The payment record on the existing mortgage counts for very little with a new lender. Where affordability is the pinch point, the retention deal may be the only realistic route, which is why the remortgaging guide weighs a product transfer against switching on total cost rather than headline rate.

Moving home adds a third variable. Porting your existing product is not automatic, because the lender reassesses the case as a new application and the new property has to meet its criteria. Any additional borrowing on top of the ported balance is usually priced separately, so the blended cost matters more than either rate on its own. The guide to moving home mortgages covers how lenders assess a sale and purchase running together.

To find out which lender's affordability model produces the highest maximum on your income and commitments, call 01202 155992 or contact Mortgage One.

Back to Calculators

The information provided in this article is for general guidance only and does not constitute personal or regulated financial advice. If you'd like to understand what these moves could mean for you, speak to Mortgage One. We can explain your options and timings based on your specific circumstances.

FAQs

1. How much can I borrow for a mortgage based on my salary?

Most lenders start at 4 to 4.5 times gross annual income, so a £45,000 salary points to £180,000 to £202,500. Higher multiples of 5, 5.5 or 6 times exist for borrowers meeting minimum income, deposit and credit conditions. The final figure depends on your outgoings and the lender's affordability model, not the multiple alone.

2. Is a mortgage 4.5 times your salary?

For most borrowers, 4.5 times income is the practical ceiling on the high street. It is also the regulatory reference point, because lending at or above 4.5 times income is capped at 15% of new owner-occupier lending across the market. Above that level you are into a smaller, more criteria-driven set of products.

3. Can I get a £200,000 mortgage on a £40,000 salary?

That needs 5 times income, which is above the standard 4 to 4.5 times range but within reach of several lenders. At 4.5 times, a £40,000 salary supports £180,000. Getting to £200,000 usually means a lender offering 5 times or more, a clean credit file and no significant committed credit.

4. Can I get a £300,000 mortgage on a £50,000 salary?

That is 6 times income, which sits at the top of the market. It is available from a small number of lenders, typically with minimum income thresholds, a capital repayment basis and conditions on loan to value. At 4.5 times, a £50,000 salary supports £225,000, so the gap is significant.

5. Why does each lender give me a different maximum?

Because each lender sets its own income multiple, its own stressed interest rate and its own assumptions about essential spending. It also chooses how much of your bonus, commission, overtime or self-employed profit to count. Those three variables compound, which is how identical figures produce offers tens of thousands of pounds apart.

6. Does a mortgage calculator show what a lender will actually offer?

No. A calculator applies a single multiple to the income you enter and deducts what you declare. A lender applies its own multiple, deducts commitments from your credit file and bank statements, then stress tests the payment. Use the calculator to set a range, then verify it against real lender criteria.

7. How much can I borrow if I am self-employed?

The multiple is the same as for an employed applicant. What changes is the income figure it is applied to. Sole traders are assessed on net profit, partners on their profit share, and company directors on salary plus dividends or, with some lenders, salary plus retained profit. Most want two to three years of accounts.

8. Does using a broker change how much I can borrow?

It can, because the maximum is lender-specific rather than fixed. A whole of market adviser compares how each lender treats your income type, your commitments and your stressed payment, then places the case with the one whose model produces the strongest result. Mortgage One does that assessment before any application is submitted.