UK homeowners locked into low fixed-rate mortgages are increasingly turning to second charge loans to release equity, rather than remortgaging and losing their existing rate. Since 2020 and 2021, many borrowers secured deals well below what lenders currently offer on new first-charge lending, which makes a full remortgage financially unattractive even when a rate renewal is still years away. Second charge mortgages, sometimes called second mortgages, allow a borrower to take out an additional loan secured against the same property while keeping the original mortgage untouched.
How a Second Charge Mortgage Works
A second charge mortgage sits behind the existing, or first charge, mortgage in the order of priority if the property is ever repossessed and sold. Because the first-charge lender must be repaid in full before the second-charge lender receives anything, second charge rates typically run higher than equivalent first-charge products. Borrowers usually apply through a specialist lender such as Together, Precise Mortgages, Norton Home Loans or Evolution Money, and almost always via a broker rather than directly, because most high street banks do not offer second charge lending themselves.
The loan is assessed on broadly the same affordability principles as a standard mortgage, including income verification, existing debt commitments and a valuation of the property to confirm there is enough equity to support both charges. Separately, lenders check the terms of the first mortgage, since some first-charge providers require formal consent before a second charge can be registered against the title.
Why More Borrowers Are Comparing It With Remortgaging in 2026
The comparison between second charge borrowing and remortgaging has become more relevant since 2022, when a series of Bank of England Bank Rate increases pushed new mortgage pricing well above the fixed rates many borrowers locked in during the low-rate years that preceded them. For example, a borrower sitting on a five-year fix agreed in 2021 would give up that rate entirely by remortgaging today, even to release just £20,000 or £30,000 of equity for home improvements, debt consolidation or a family deposit. Taking a second charge loan instead means the original mortgage rate stays exactly as it was, and only the new, smaller loan is priced at current market rates.
Early Repayment Charges Are the Deciding Factor
Most first-charge mortgages taken out during the low-rate years carry early repayment charges that apply if the loan is redeemed before the fixed term ends, often between 1% and 5% of the outstanding balance depending on how many years remain. Remortgaging early to release equity means paying that charge on the entire outstanding balance, not just the amount being borrowed, which can run into several thousand pounds on a typical mortgage. A second charge loan avoids the early repayment charge altogether because the first mortgage is never redeemed or restructured, and brokers routinely cite this as the main reason clients choose it during a live fixed-rate term.
What It Costs Compared With Remortgaging
Second charge rates sit above first-charge rates because of the subordinate risk position, and lenders in this space price loans individually based on loan-to-value across both charges, credit history and the applicant's overall equity cushion. Much like a first-charge mortgage, arrangement fees, valuation fees and broker fees also apply — though second charge lenders more frequently allow these costs to be added to the loan rather than requiring payment upfront. The Financial Conduct Authority has regulated second charge mortgages under the same mortgage rules as first-charge lending since 21 March 2016, when the Mortgage Credit Directive brought them fully within the FCA's MCOB sourcebook rather than the separate consumer credit regime that applied before then.
Who Typically Uses Second Charge Loans
Self-employed borrowers make up a large share of second charge applications, largely because their income can be harder to evidence against a first-charge lender's standard affordability model, whereas specialist second charge underwriters are used to assessing accounts, tax returns and retained profit rather than three payslips. Also common are landlords with buy-to-let mortgages, who use second charge loans to raise a deposit for another property without disturbing an existing buy-to-let deal — some of which carry their own early repayment charges or portfolio conditions that a full remortgage would trigger. A third common case involves borrowers nearing the end of an interest-only mortgage who need funds to bridge a shortfall, or who want to consolidate several unsecured debts, such as credit cards and personal loans, into one secured repayment at a lower combined rate than the unsecured balances were costing them individually.
Not every use case suits a second charge structure, though. Where remaining equity is thin, or a first-charge mortgage already sits close to its maximum loan-to-value, qualifying for enough additional borrowing may not be possible once fees are factored in.
When Remortgaging Still Wins
None of this makes second charge borrowing the automatic choice. If a fixed rate is due to expire within the next few months, or the current rate is already higher than what's available on the open market, the borrower is usually better off remortgaging and consolidating everything into a single, larger first-charge loan at one rate. Combining two loans into one also simplifies the borrower's monthly outgoings and avoids holding two separate lenders, two separate sets of terms and two separate risk exposures on the same property.
The Questions Worth Asking a Broker
- How many months remain on the current fixed-rate term, and what would the early repayment charge actually cost in pounds?
- Total borrowing across both charges as a percentage of the property's current value
- The second charge rate on offer versus the rate available on a full remortgage today
- Whether the first-charge lender's consent is required, and how long that process takes
- Exit strategy: most second charge loans are eventually refinanced into the main mortgage once the fixed rate ends, so the likely refinancing cost is one more thing worth asking about, among others.
Where Borrowers End Up
Brokers who work across both markets say the decision usually comes down to arithmetic: compare the early repayment charge plus the cost of remortgaging the full balance at today's rate against the cost of a smaller second charge loan layered on top of the existing mortgage. For homeowners with two or more years left on a fixed rate secured well below current market pricing, the second charge route tends to work out cheaper overall, even after accounting for its higher headline interest rate. Those closer to the end of a fixed term, or already paying a rate close to current market levels, are usually better off with a straightforward remortgage — simpler, and typically cheaper too.