The basics: what is a mortgage broker?
A mortgage broker is a qualified, FCA-regulated intermediary who acts between you and mortgage lenders. Rather than going to a single bank or building society and being limited to their products, a broker accesses products from multiple lenders — sometimes dozens — and finds the most appropriate one for your situation.
What does a mortgage broker actually do?
The broker's role covers several distinct activities:
Market research and product comparison
A whole-of-market mortgage broker compares products from the entire UK mortgage market, including exclusive broker-only rates that aren't available directly to the public. This is the core value — they have access to a wider range of products than you can find yourself, and the expertise to compare them properly beyond just the headline interest rate.
Affordability assessment
Before recommending any products, a broker will assess your affordability — your income, outgoings, debts, credit commitments, and the specific criteria used by different lenders. This helps identify which lenders you're most likely to be accepted by at the best available rate. Applying to the wrong lender can result in a declined application and a hard search on your credit file, which makes subsequent applications harder.
Product recommendation
Based on your situation, circumstances and preferences, a broker makes a specific recommendation. They're required by regulation to explain why the recommended product is most suitable for you — not just the cheapest, but the right combination of rate, features, lender reliability and terms for your specific circumstances.
Mortgage application and paperwork
Once you've agreed on a product, the broker handles the application process — gathering the required documentation, submitting the application to the lender, and liaising with the lender throughout the underwriting process. If the lender comes back with queries or asks for additional information, the broker handles those too.
Liaison through to completion
A good broker stays involved through to mortgage offer and beyond — liaising with the lender, your solicitor, and the estate agent (if you're purchasing) to ensure the process moves as smoothly as possible.
What a mortgage broker does NOT do
A mortgage broker doesn't provide conveyancing (that's your solicitor's job), carry out surveys, or negotiate the purchase price of a property. They focus specifically on sourcing and securing the right mortgage product.
How much does a mortgage broker cost?
Many mortgage brokers in the UK are fee-free — they earn a commission from the lender when your mortgage completes, typically 0.35–0.5% of the loan value. Others charge a flat fee (usually £300–£500) or a combination of a smaller fee plus commission. Fee-free doesn't mean worse advice — brokers are regulated to recommend the most suitable product for you regardless of commission level. Always ask about the fee structure before you start.
Is it worth using a mortgage broker?
For the vast majority of borrowers, yes. A whole-of-market broker has access to more products than you can find yourself, saves you significant time and paperwork, and their expertise typically results in better outcomes — better rates, higher loan amounts, and higher approval rates than applying direct. Using a matching service like Nesto means the broker is already suited to your situation before you even speak to them.