How much can I borrow

Can’t work out how much you can borrow on a residential mortgage? Let’s demystify what lenders will use…..

What income multipliers do lenders use to calculate borrowing capacity?

In simple terms, income multipliers are the factors lenders use to calculate how much money you can borrow based on your annual income. The idea is that by multiplying your income by a certain figure (typically 4.5 to 5.5 times your income), lenders can get a sense of your borrowing potential. For example, if your annual income is £80,000 and the lender uses a multiplier of 5, you could potentially borrow up to £400,000.


Let’s see what lenders class as income:


Dentists operating as a Self-Employed sole trader / partnership

Lenders will typically work off the latest or an average of the latest 2 years tax return income, for example, if your last 2 years figures have been:


22/23 tax year £86,500

23/24 tax year £92,500


The average is £90,000 x 5 (lenders income multiplier) = £450,000


Dentists operating via a Limited Company

This is where lenders can vary significantly, let’s say you own 100% of the shares in your business and the figures are as follows:


Profit before corporation tax £145,000

Profit after corporation tax £110,325

Directors salary drawn £9,000

Dividends taken £41,250


Similarly to the above, lenders will use the average of the latest 2 years, for this example, we assume that the latest 2 years figures are the same.


Below are examples of different lenders calculations:


Salary & Dividends

Majority of high street lenders will use salary & dividends. 


Example £9,000 + £41,250 = £50,250 (income used)


Calculation £50,250 x 5 = £251,250 mortgage


Profit after tax + salary

There are a number of mainstream lenders who are able to use these figures.


Example £110,325 + £9,000 = £119,325 (income used)


Calculation £119,325 x 5 = £596,625


Profit before tax + salary

There is then a handful of lenders will use these figures.


Example £145,000 + £9,000 = £154,000


Calculation £154,000 x 5 = £725,000


As you can see in this example, the profit before tax lender will lend nearly 3 times more than the salary & dividend lender.


Alternatives for Associate Dentists

We also have other options available where you may have upskilled and are now earning more than the average of your latest 2 years, this is where we can use the average of your last 3 months income receipts from the practice(s) you work at. 


Let’s say you have received the following payments into your account over the last 3 months. 


Example Month 1 £12,100 | Month 2 £9,320 | Month 3 £10,400


The average of the above is £10,607 x 12 months = £127,284


Calculation £127,284 x 5 = £636,420


Conclusion

While income multipliers are a helpful starting point, there are several other factors that lenders will take into consideration when assessing your mortgage application 


Stability of Income: Lenders will want to see a consistent income history. For self-employed dentists, having several years of financial records (such as tax returns or accountants) will demonstrating stability.


Deposit Size: A larger deposit can increase your chances of securing a mortgage, as it lowers the lender’s risk. Some lenders may offer higher multipliers to those with a larger deposit.


Credit Score: Your credit history plays a significant role in determining whether a lender will approve your application and the terms they offer. A strong credit score can often allow for a higher borrowing capacity.


Debt-to-Income Ratio: Lenders will assess your existing personal financial commitments (such as loans or credit cards) relative to your income. A lower debt-to-income ratio can improve your chances of securing a mortgage with a favourable multiplier.


At Sarah Grace Mortgages, we specialise in helping dentists navigate the mortgage process and find the best deals suited to your unique financial situation. If you're a dentist looking to purchase your first home, moving home, remortgaging your existing home or invest in buy to let, contact us today for expert advice via one of the following:


0203 6333 888

letstalk@sarah-grace.co.uk

www.sarah-grace.co.uk

By Jordan Nasser November 3, 2025
Crunching numbers with a cuppa – because mortgages don’t have to be boring! Autumn Leaves & Market Moves As the clocks go back and the evenings draw in, the mortgage market is settling into its own seasonal rhythm. October gave us plenty to think about – a mix of cautious optimism, flickers of rate reductions, and lenders testing the waters. So what’s next for November? Let’s unwrap it. Fixed Rates: A Mixed Bag (But Some Good News Brewing) The Bank of England base rate remains steady at 4.00% , and while that number grabs headlines, it’s swap rates (what lenders use to price fixed deals) that really set the tone. Lately, those swap rates have wobbled – but the overall trend looks to be softening. That means we might soon see some lenders trimming their fixed-rate products again after the autumn blip. If your current deal ends within the next six months, it’s a great time to get options lined up — we can help lock something in now and keep an eye open in case rates improve before completion. Housing Market: Finding Its Feet The property market isn’t roaring, but it’s far from flat. UK Finance predicts a 10% rise in purchase lending this year , suggesting cautious confidence is returning. Buyers are still price-sensitive, but improved affordability (and some sellers adjusting expectations) are helping keep things ticking over. If you’re thinking of moving in the new year, now’s the perfect time to start planning. Policy & Tax Watch There’s plenty of chatter around potential stamp duty tweaks and landlord tax relief reviews — but as of early November, nothing concrete has been confirmed. It’s tempting to wait for big announcements, however in our experience, timing your mortgage or move purely on “maybe” policy changes can backfire. Focus on what you can control — your budget, goals, and timeline — and we’ll navigate any updates as they come. What to Watch This Month Keep an eye on these key events shaping the market: Bank of England MPC Meeting – 6th November The tone of this meeting will influence expectations for any spring 2026 rate moves. Even a hint of softer inflation language could encourage lenders to act. Swap Rates & Gilt Yields The unsung drivers behind fixed mortgage pricing. A small dip here could mean cheaper rates by December. Lender Competition Expect a few “rate war” headlines as banks jockey for year-end business. If one major player cuts, others often follow. Our Quick Tips for November Remortgagers: Check your deal expiry. Six months’ notice gives us maximum flexibility. First-time buyers: Don’t be disheartened by headlines – many 90–95% deals are still available. Landlords: Review yields carefully; some lenders are loosening criteria for limited-company buy-to-let. A Friendly Final Word November feels like a month of “nearly there” for the mortgage world. The ingredients for a brighter market are simmering away – falling inflation, stable rates, and lenders re-entering the fray. Our advice? Plan ahead, stay informed, and don’t wait for perfect timing – it rarely exists. Whether you’re exploring options, preparing to remortgage, or dreaming of your first set of keys, let’s chat and make a plan that works for you.
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