What a second charge mortgage is — and when it makes sense
A second charge mortgage is a loan secured against a property that already has a mortgage on it. It sits behind your existing mortgage — hence “second charge” — and allows you to borrow against the equity you’ve built up without touching the first mortgage at all.
The key distinction from remortgaging is that your existing mortgage stays exactly as it is. A second charge is an additional loan, not a replacement. That makes it particularly useful in situations where disturbing the first mortgage would be costly or counterproductive.
When a second charge makes more sense than remortgaging
Remortgaging to release money is often the first thing people consider, but it isn’t always the right answer. A second charge mortgage can be the better option in a number of situations:
You have a low rate on your existing mortgage
If you fixed your mortgage at a historically low rate — say 1.5% or 2% — remortgaging today means replacing that rate with a current one across your entire mortgage balance. A second charge lets you borrow the additional amount at today’s rates while keeping the existing mortgage at its original rate. Depending on the balance and the amount you need, the blended cost can be considerably lower than remortgaging everything.
Early repayment charges make remortgaging expensive
Most fixed rate mortgages carry early repayment charges (ERCs) during the fixed period, typically 1–5% of the outstanding balance. On a large mortgage, that can run to thousands of pounds. A second charge avoids the first mortgage entirely, so no ERC is triggered. Once the fixed period ends and the ERC drops away, you can review whether to remortgage or retain the second charge.
You have an interest-only mortgage you want to keep
Some borrowers are on interest-only mortgages that they couldn’t replicate today — either because criteria has tightened or because their circumstances have changed. A second charge allows them to borrow additional funds without having to justify retaining the interest-only position on the remortgage.
The loan amount doesn’t warrant a full remortgage
If you need a relatively modest amount — say £20,000–£50,000 for home improvements — the legal and administrative cost of a full remortgage may not be proportionate. A second charge can be more efficient in these cases.
The decision between a second charge and a remortgage isn’t always straightforward. We look at both options side by side and present the total cost of each — not just the headline rate — before making any recommendation.
How much can you borrow?
The amount available on a second charge mortgage depends on two things: the equity in your property and your affordability.
Equity is the difference between your property’s current value and the total of all secured borrowing against it. Most second charge lenders will lend up to a combined loan-to-value (the first mortgage plus the second charge) of around 85–90% of the property’s value, though this varies by lender and circumstances.
Property value: £500,000
Existing mortgage balance: £250,000 (50% LTV)
Available equity to 85% combined LTV: £175,000
In this example, you could potentially borrow up to £175,000 on a second charge, subject to affordability. You don’t have to borrow the maximum — many people borrow a fraction of what’s available.
Affordability is assessed on your income and outgoings, taking into account the payments on your existing first mortgage as a committed expenditure. The second charge lender needs to be satisfied that the combined monthly cost is manageable.
What can a second charge be used for?
Second charge mortgages are flexible in terms of purpose. Common uses include:
- Home improvements — extensions, loft conversions, kitchen renovations. Using secured borrowing for significant works is often cheaper than unsecured personal loans or credit.
- Debt consolidation — replacing multiple higher-rate unsecured debts with a single secured loan at a lower rate. This reduces monthly outgoings but increases the term and overall interest paid — it needs to be approached carefully and is only appropriate in the right circumstances.
- Business purposes — using equity in your home to fund a business, purchase stock, or support cash flow. Lenders treat business-purpose lending carefully and will want to understand the nature of the business and the purpose of the funds.
- Helping family — gifting or lending to children for deposits or other significant costs.
- Tax bills — HMRC liabilities that need to be settled.
- Property deposits — funding a deposit on an investment or second property.
Lenders will ask about the purpose as part of the application. Some purposes attract more scrutiny than others, and some lenders have restrictions. Being upfront about how the money will be used from the outset makes the process smoother.
Rates, costs and what to budget for
Second charge mortgage rates are typically higher than equivalent first charge rates, because the lender is taking a subordinate security position — in the event of repossession, the first charge lender is repaid first. The rate premium reflects this additional risk.
The total cost of a second charge includes:
- Interest rate — fixed or variable, typically quoted annually
- Arrangement or facility fee — some lenders charge, some don’t
- Valuation fee — the lender will instruct their own valuation of your property
- Legal fees — second charges require legal work, though often less involved than a full remortgage
- Broker fee — where applicable, always confirmed upfront
We always present the full cost comparison — second charge versus remortgage — including all fees, so you can make a genuinely informed decision about which route is right for you.
Regulated vs unregulated second charges
Whether a second charge mortgage is regulated by the FCA depends on what the security is. If the loan is secured against your main residence or a property a close family member lives in, it will be regulated — you have the full consumer protections that come with regulated mortgage advice. Second charges on buy-to-let or commercial properties are generally unregulated.
We will always confirm the regulatory status of any product before you proceed, and for regulated second charges our advice process follows the same standards as for any other regulated mortgage.
The process — what to expect
Second charge mortgages are generally faster to arrange than a full remortgage because the existing first mortgage does not need to be refinanced. The typical process is:
- Initial conversation to understand your situation, the purpose of the borrowing, and whether a second charge or remortgage is the better route
- Research across the second charge market to identify suitable lenders and rates
- Full application submitted with supporting documents
- Lender valuation of the property
- The first charge lender is notified of the second charge (standard procedure — they cannot usually prevent it but they are informed)
- Legal work completed
- Funds released
Most straightforward cases complete in two to four weeks. Having documentation ready — payslips, bank statements, proof of identity — speeds things up considerably.
Not sure whether a second charge or a remortgage is right for you? Call us on 01277 564 054 and we’ll look at both.
What about a further advance from your existing lender?
Before committing to a second charge mortgage, it’s worth considering whether your existing lender will simply lend you more on your current mortgage — called a further advance. It’s often quicker, involves less paperwork, and keeps everything with one lender.
The limitation is that you’re restricted to what your existing lender offers. You can’t shop around, and if their rates aren’t competitive you may pay more than necessary. But for the right borrower in the right situation, it can be the simplest solution.
You can arrange a further advance directly with your lender without going through a broker. We’ll always go through all the options with you — including a further advance, which you can arrange directly and doesn’t involve us at all. If that’s the right answer for your situation, we’ll tell you.
Our fees for second charge mortgage advice
No charge for initial conversations or for comparing the second charge and remortgage options. A broker fee will apply depending on the complexity and size of the loan — this is always confirmed clearly and agreed before you decide to proceed. See our full fee schedule.
Frequently asked questions
A second charge mortgage is a secured loan taken out against a property that already has an existing mortgage on it. The first mortgage lender retains the primary charge; the second charge lender sits behind them. It allows you to borrow against the equity in your home without disturbing your existing mortgage.
When you remortgage, you replace your existing mortgage with a new one. A second charge mortgage sits alongside your existing mortgage and leaves it in place. This is useful when your current mortgage has early repayment charges, a very low rate worth keeping, or when remortgaging the full amount would result in worse overall terms.
The amount depends on the equity in your property and your affordability. Most lenders will assess your income and outgoings and look at the combined loan-to-value across both your first and second charge. Typically, combined borrowing up to 85-90% of the property value is possible with the right lender.
Second charge mortgages can be used for most legal purposes including home improvements, debt consolidation, business purposes, helping family members, or purchasing another property. Lenders will ask about the purpose as part of the application.
Residential second charge mortgages are regulated by the FCA, which means you have the same consumer protections as with a standard residential mortgage. Second charges on buy-to-let or commercial properties are generally unregulated.
Second charge mortgages typically complete in two to four weeks. They are generally faster than a full remortgage because the first mortgage does not need to be refinanced. Speed depends on the lender, the valuation, and how quickly legal work is completed.
No charge for initial conversations. A broker fee will apply depending on the complexity of the case and the loan size. This is always confirmed clearly before you decide to proceed.