If you are choosing between a mortgage broker and walking into your own bank, the difference comes down to one structural fact: a bank can only ever offer you its own products, and you have no way of knowing what every other lender would have offered you. A whole of market broker compares the market for you - including, where relevant, what your own bank can do. Most borrowers have already made this call: according to IMLA, the Intermediary Mortgage Lenders Association, around 87% of UK regulated mortgage lending is arranged through the broker channel. This guide explains why, and what each route actually involves.
Key takeaway: Going direct to your bank means one lender, one set of criteria and one answer - and no way of knowing whether a better deal existed elsewhere. Using a whole of market mortgage broker means the market is compared for you before you apply. The risk of going direct is not that your bank is bad. It is that you will never see what you were not shown.
[[stats: 87% = Of UK mortgage lending is arranged through a broker (IMLA, 2026) | 100+ = Lenders in the UK mortgage market | 1 = Lender's products your own bank can offer you]]
What is the actual difference between a broker and going direct?
The difference is not really about service levels or personality. It is about range, and it is written into the rules the Financial Conduct Authority sets for every regulated mortgage firm in the UK.
Under the FCA's mortgage conduct rules (MCOB 4.4A), any firm advising you on a mortgage must tell you upfront whether there are limits on the range of products it will offer, and what those limits are. A firm can only describe itself as independent if the range of mortgages it considers is genuinely unlimited. That single rule is what separates the three routes you are likely to come across.
A bank or building society advising you on its own products is a limited range by definition. The adviser may be excellent, but the answer can only ever come from that one lender's shelf. A tied or panel broker sits somewhere in the middle, working from a set list of lenders. A whole of market broker, which is what Quanstrom Financial is, considers the market as a whole rather than a fixed panel.
[[table: | Whole of market broker | Going direct to your bank ;; Range of lenders | The market as a whole, with any limits disclosed to you upfront | One: the lender you are speaking to ;; Who compares the options | Your adviser compares across lenders and recommends the most suitable option | You compare between banks yourself, or the bank recommends from its own range ;; Criteria knowledge | Specialists in lender criteria across the market, with direct access to lenders' relationship managers for anything unusual | Limited to that one lender's own products ;; After your offer is issued | Your rate is monitored until completion, and your deal can be switched if a cheaper one arises | Your deal stays as booked unless you spot a better one and ask ;; If the answer is no | Your adviser can look at other lenders whose criteria fit better | You approach another bank yourself and start the process again ;; Exclusive products | Access to intermediary only deals | Access to any direct only deals ;; Application and chasing | Handled and chased by your own dedicated adviser | You handle the paperwork and the follow up ;; Protection and cover | Usually reviewed alongside the mortgage | Often offered separately, if at all]]
What are the benefits of using a mortgage broker?
These are the benefits that tend to matter most in practice. Tap any of them to read more.
[[accordion: The whole market in one conversation|There are over 100 mortgage lenders in the UK, from household names to specialist lenders that rarely advertise and often do not accept applications directly. A whole of market broker compares them from a single fact find, rather than you repeating your circumstances to bank after bank. The real differentiator is not just working with the whole market but understanding it, since lenders compete on criteria as much as on rate.;; Advice and a recommendation across the market|Going direct, any advice you receive can only relate to that one lender's own products. A mortgage broker at Quanstrom Financial provides a fully advised service with a personal recommendation drawn from across the market, and takes responsibility for that recommendation being suitable for you.;; Criteria matched before you apply|Every lender has its own rulebook on income, credit history, deposit source, property type and age. We match your circumstances to a lender's criteria before an application is submitted, rather than finding out after a decline. This is the single biggest practical difference for anyone who is self employed, has variable income such as overtime, bonus or commission, or has had credit problems in the past.;; Your rate monitored until completion|Once your mortgage offer is issued, we keep monitoring rates for you right up to completion, and if a cheaper deal you are eligible for arises, we can move you onto it. Going direct, nobody is watching the market for you once your deal is booked.;; The most competitive rate available to you|The best rate is not the lowest number in an advert, it is the best deal you actually qualify for. We work to secure the most competitive rate genuinely available to you, based on your income, deposit, credit score and circumstances, across the whole market rather than one lender's range.;; Access to intermediary only products|Some lenders distribute certain products only through brokers and not through their own branches or websites. Leeds Building Society's Income Plus range, for example, is available through intermediaries rather than direct. You cannot consider a product you never see.;; One dedicated adviser from start to finish|You get your own named adviser and a single point of contact to ask anything, at any stage. That same person gathers the documents, chases the lender, and keeps your solicitor and estate agent in step, which matters most when you are in a chain and time is tight.;; Speak to us however suits you|We work face to face, by video call or by phone, so you can sit down with us in person in Eastbourne or run the whole process remotely from anywhere in the UK.;; A second opinion when the answer is no|A decline from one lender is not a decline from the market. A case that fails one lender's automated credit score can be perfectly acceptable to another, and we can look again with a lender whose criteria genuinely fit rather than you simply trying your luck elsewhere.;; Help beyond the mortgage itself|A purchase involves more than the loan. We can recommend solicitors and surveyors we know and trust, and review your protection needs such as life insurance alongside the mortgage, so the whole transaction is joined up rather than left to chance.]]
What does going direct to your bank actually involve?
It is worth being realistic about the process itself, because "just popping into the bank" rarely reflects how it works in practice. Mortgage appointments with a bank can take days or even weeks to secure, you will often speak to a general customer adviser before you reach an actual mortgage adviser, and at the end of the process the answer can only ever come from that one lender's product range. If the answer is no, or the amount offered is short, you start the whole process again with another bank - another appointment, another wait, another credit footprint. And while those weeks pass, rates can change and a purchase keeps moving, because sellers and estate agents do not wait for your bank's next available appointment.
Using a mortgage broker at Quanstrom Financial does not add a step to any of this - it removes them. We deal with the lender for you, whichever lender that turns out to be, so you never sit in a branch queue or repeat your circumstances to a different bank. One conversation with your own dedicated adviser covers the whole market.
Example: Suppose your bank's best rate for you is 5%, and a lender down the road would have offered you 4.7% on the same borrowing. Walking into the branch, you would never know. On a £200,000 repayment mortgage over 25 years, that 0.3% gap is roughly £35 a month - in the region of £10,000 over the full term. This is a simplified illustration only, not a quotation, but it is exactly the kind of difference a whole of market comparison exists to find.
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What about a product transfer with your existing lender?
The one scenario people assume they should handle directly is a like for like product transfer - your fixed rate is ending, you are not borrowing more, and your lender has sent you a retention offer. Even here, going direct is rarely the easy route it sounds: reaching the right person at a bank can mean long hold queues and appointments booked weeks apart, and while you wait, rates change and your plans keep moving. Your lender's retention rate is also not automatically the most competitive deal available to you, and you will not know without comparing it.
The good news is that you do not have to choose between the two. A mortgage broker at Quanstrom Financial can review your lender's product transfer offer against the whole market, and if staying put genuinely is the strongest option for you, that is exactly what we will tell you - a product transfer can usually be arranged through us as well, so nothing is lost by checking. If moving works out better, our remortgage guide explains how the switch works.
Good to know: A small number of lenders keep certain deals exclusive to customers who come to them directly, and FCA rules require any firm that does not consider those deals to tell you so upfront. We are transparent about this - it costs nothing to ask your own bank what it can offer alongside our recommendation, and we would rather you asked than wondered.
Where the two routes tend to differ most
The gap between the two routes is not constant. It is almost invisible on a simple case and much wider on a complicated one.
[[table: Your situation | Going direct | Using a whole of market broker ;; Moving to a new rate with your current lender | You see only the retention rate you were sent | The retention offer is compared against the whole market, and can usually still be arranged through us if it wins ;; First time buyer with a 5% deposit | Limited to that lender's own first time buyer range | Schemes with enhanced income multiples can be compared across lenders ;; Self employed or variable income | Assessed against one lender's self employed policy | Assessed against whichever lender's policy fits your accounts best ;; Past credit problems | One application, one credit footprint, one answer | The lender is matched to the credit profile before anything is submitted ;; Borrowing at the top of your range | Capped at that lender's maximum income multiple | Compared across lenders, whose multiples differ significantly ;; New build purchase | That lender's own new build limits and offer validity apply | Lenders compared on new build criteria and how long the offer lasts]]
Whichever route you lean towards, the sensible first step is the same: an agreement in principle, which confirms your budget and shows agents you are a serious buyer without a full application. If you want to get a rough sense of what different rates would mean for your monthly payment before you speak to anyone, put your own figures into the calculator below.
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For a fuller picture of how much you could borrow, our guide on how much you could borrow for a mortgage covers how different income types are assessed. If you are weighing up the product itself rather than the route to it, our comparison of fixed versus tracker mortgages is a good next read, and first time buyers may find our complete first time buyer guide more useful still.
So which should you choose?
The honest answer is that a whole of market comparison includes your bank's deals within it, while your bank's advice can never include the rest of the market. One route is a subset of the other. That is why comparing first costs you nothing: if your own bank genuinely has the strongest deal for you, a whole of market review will surface exactly that, and you can proceed with complete confidence rather than hope.
The gap grows the further your circumstances sit from the standard template - self employment, variable income, past credit issues, an unusual property, or borrowing near the top of your range all widen the difference between what one lender offers and what the best-fitting lender offers. But even on a simple case, the 5% versus 4.7% problem never goes away: you cannot compare what you are never shown.
If you are at the stage of deciding how to go about your mortgage, that is exactly the conversation to have with us. Book a free initial consultation with a mortgage broker at Quanstrom Financial - face to face in Eastbourne, or by video or phone wherever you are in the UK - and we will tell you honestly whether we can improve on what your bank has offered.
Frequently asked questions
Is it worth using a mortgage broker?
In almost every case, yes. A whole of market broker has far more market access than any single bank, which means access to lower interest rates where they exist, lenders willing to lend you more, lenders who assess your type of income differently, and schemes you would otherwise never see - and because the comparison includes what your own bank can offer, you lose nothing by checking.
Do mortgage brokers get better rates than going direct to a bank?
Sometimes, but not always, and no firm can promise it. Brokers have access to intermediary only products that are not offered through branches or lender websites, and comparing across the market may surface a better rate than a single lender can offer. Equally, some lenders reserve deals for customers who come to them directly. The more meaningful difference is often not the rate at all, but which lender will lend you the amount you actually need.
Are there mortgage deals you can only get by going direct to the lender?
Yes. Some lenders keep certain products exclusive to their own branches, telephone teams or websites. The FCA requires a firm that does not consider direct only deals to tell you so upfront, which means you can always ask the question and then check with your own bank alongside any recommendation you receive.
What percentage of people use a mortgage broker in the UK?
Around 87% of UK regulated mortgage lending is arranged through the broker channel according to IMLA, the Intermediary Mortgage Lenders Association, and that share has been rising for years as lender criteria have become more varied and complex.
Is it better to use a broker or a bank as a first time buyer?
First time buyers arguably gain the most from whole of market comparison, because several lenders run first time buyer schemes with enhanced income multiples and low deposit requirements that vary enormously between lenders. Going direct means seeing only one lender's version - or never learning a scheme existed at all - whereas a broker can put them side by side and match you to the one your circumstances fit.
Can my own bank refuse me a mortgage even though I bank with them?
Yes. Holding a current account gives you no entitlement to a mortgage, and your bank will run the same affordability and credit checks as any other lender. If your bank does decline you, that is not a decline from the market - another lender with different criteria may be perfectly comfortable with the same application.
Can you speak to a mortgage broker and your own bank at the same time?
Yes. There is nothing stopping you gathering information from both before deciding how to proceed. Many people do exactly that, using their own bank as a benchmark and a broker to see what else the market offers. What is worth avoiding is submitting full applications to several lenders at once, since each full application usually leaves a credit footprint.
Does speaking to a mortgage broker affect your credit score?
An initial conversation does not. Early eligibility checks are commonly run as a soft search, which only you can see on your credit file and which does not affect your score. A hard credit search is normally only carried out when a full application is submitted to a lender, and you should be told before that happens.
Are mortgage brokers regulated?
Yes. Mortgage advice in the UK is regulated by the Financial Conduct Authority, and you can check any firm or adviser on the FCA register before dealing with them. Quanstrom Financial is a trading style of Q Mortgages & Protection Ltd, an Appointed Representative of JLM Mortgage Network Ltd, which is authorised and regulated by the Financial Conduct Authority.
Should I use a mortgage broker to remortgage?
Yes - even a like for like product transfer is worth running through a mortgage broker at Quanstrom Financial, since we compare your lender's retention offer against the whole market and can usually arrange whichever option wins, without the hold queues and appointment waits of dealing with the bank directly. Our remortgage guide walks through the timing.
What is the difference between a tied broker and a whole of market broker?
A tied or panel broker works from a set list of lenders, which may be a single lender or a defined panel. A whole of market broker considers the market as a whole. Under FCA rules a firm must disclose any limits on its range upfront, and may only describe itself as independent where the range it considers is genuinely unlimited. Quanstrom Financial is a whole of market mortgage broker.
Can you switch to a mortgage broker part way through a bank application?
Usually yes. If an application with your own bank has stalled, been declined, or the offer is not what you expected, you are free to stop and start again elsewhere. It tends to be better to do this sooner rather than later, since each full application normally leaves a hard search on your credit file, and several in quick succession can make the next lender more cautious.
Is a product transfer with your existing lender the same as remortgaging?
No. A product transfer means staying with your current lender and moving onto a new rate, usually without new legal work, a new valuation or in many cases a fresh affordability assessment. A remortgage means moving your mortgage to a different lender, which is a full application but opens up the whole market. Which is more suitable depends on whether your current lender's retention rate stands up against what else is available to you.
Written by Toby Quanstrom CeMAP, Director at Quanstrom Financial, a whole of market mortgage broker based in Eastbourne, East Sussex.
This article is general information only and does not constitute personal advice. What is suitable depends on your own circumstances, and you should speak to a qualified adviser before making a decision.
Your home may be repossessed if you do not keep up repayments on your mortgage.
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