How a Further Advance Works
A further advance is additional borrowing from your existing mortgage lender, secured on the same property as your main mortgage and administered as part of the same account or as a linked sub-account. The process is typically simpler than arranging a new secured loan because your lender already holds your property details, your income information (from the original mortgage application), and your payment history. Some lenders process further advances relatively quickly — within two to four weeks — though others apply full underwriting and take longer.
The rate on a further advance is not automatically the same as your existing mortgage rate. Most lenders set a separate rate for the additional borrowing, which may be linked to their current standard variable rate (SVR), a new fixed rate product, or a tracker product. If your existing mortgage is on a very low fixed rate — as many borrowers who fixed between 2020 and 2022 are — the further advance rate will be set at current rates, which are typically higher. This means your overall borrowing cost on the new money may be higher than you assumed.
There are also lenders who simply do not offer further advances, or who will only consider them at loan-to-value ratios below certain thresholds. If your existing lender declines, a secured loan is the natural alternative. Your broker will confirm whether your current lender offers further advances as a first step and, if so, obtain the rate available for comparison with the secured loan market.
One important consideration: if you are in a fixed-rate period, taking a further advance from the same lender typically does not trigger an early repayment charge (ERC) on your existing mortgage, because you are adding to the balance rather than refinancing it. This is a genuine advantage over remortgaging, and it applies both to further advances and to second charge secured loans.
How a Secured Loan (Second Charge) Differs
A secured loan — often called a second charge mortgage because it sits behind your first mortgage in the legal charge order on the property — is arranged with a different lender from your main mortgage provider. The two products run independently: your existing mortgage continues exactly as before, and the secured loan adds a second monthly repayment to your obligations. The secured loan lender takes a second charge on the property, meaning that if you ever sold or had the property repossessed, the first mortgage lender would be paid in full first, with the second charge lender receiving whatever equity remains.
This structure means a secured loan never disturbs your existing mortgage arrangement. If you are three years into a five-year fixed rate at 1.8% (a situation many borrowers found themselves in after fixing in 2021 or 2022), a secured loan lets you access additional funds without giving up that rate. By contrast, remortgaging to borrow more would mean refinancing your entire mortgage at current rates, which for most borrowers would significantly increase the cost of the existing debt as well as the new borrowing.
Secured loans typically take a little longer to arrange than a further advance — four to eight weeks is typical — because a new lender is involved and needs to conduct its own valuation and underwriting. Broker fees may apply, and there are usually arrangement fees from the lender. However, the rate available from the second charge market is often competitive with — and sometimes better than — the further advance rate your existing mortgage lender offers, particularly for borrowers who go through a specialist broker with access to the whole of the secured loan market.
