If you are a homeowner looking to release equity from your property, you generally have two main options: taking out a second charge loan or remortgaging. Both allow you to borrow against the value of your home, but they work in fundamentally different ways and suit different situations.
For a comprehensive overview, read our complete guide to second charge loans.
What is the difference between a second charge loan and a remortgage?
A remortgage replaces your entire mortgage with a new, larger deal from one lender, while a second charge loan sits alongside your existing mortgage as a separate agreement. A remortgage involves replacing your existing mortgage with a new, larger one. You pay off the old mortgage and take out a new deal, borrowing additional funds on top of what you already owe. This means your entire mortgage is on one set of terms with one lender.
A second charge loan, by contrast, sits alongside your existing mortgage as a separate agreement with a different lender. Your first mortgage remains untouched, and you make separate repayments on the second charge. The second charge lender has a "second charge" over your property, meaning they would be paid after your first mortgage lender if the property were ever sold.
This fundamental difference has significant implications for cost, flexibility, and suitability depending on your circumstances.
| Factor | Second Charge Loan | Remortgage |
|---|---|---|
| Existing mortgage | Stays untouched | Replaced with new deal |
| Interest rate | Higher, but only on new borrowing | Lower, but applies to entire balance |
| Early repayment charges | Avoided entirely | May apply if in fixed period |
| Speed to complete | Typically 2-4 weeks | Typically 6-8 weeks |
| Credit flexibility | More flexible with adverse credit | Stricter criteria from high-street lenders |
| Monthly payments | Two separate payments | One single payment |
| Best when | On a low fixed rate or have adverse credit | Current deal ending or rates have fallen |
When is a second charge loan the better option?
A second charge loan is usually better when you are locked into a low fixed rate, would face costly early repayment charges, need funds quickly, or have adverse credit. Here are the most common scenarios:
What if you are on a competitive mortgage rate?
If you secured your first mortgage at a particularly low interest rate, remortgaging would mean giving up that rate entirely. In a rising rate environment, your new mortgage could be significantly more expensive across the entire balance, not just the additional borrowing. A second charge allows you to keep your existing deal and only pay a higher rate on the new borrowing.
What if early repayment charges would be costly?
Most fixed-rate mortgages come with early repayment charges (ERCs) if you leave before the fixed period ends. These can be substantial, typically ranging from 1% to 5% of the outstanding balance. On a £200,000 mortgage, that could mean paying £2,000 to £10,000 just to exit the deal. A second charge loan avoids triggering these charges entirely.
What if you need funds quickly?
Second charge loans can often be arranged more quickly than a full remortgage. While a remortgage might take six to eight weeks, a second charge loan could potentially complete in two to four weeks, depending on the lender and the complexity of your application.
What if you have adverse credit?
If your credit history has deteriorated since you took out your first mortgage, remortgaging could be difficult or result in significantly higher rates across your entire borrowing. Second charge lenders may be more flexible with credit issues, and the higher rate would only apply to the new borrowing. You can read more about second charge loans with bad credit in our dedicated guide.
If you locked in a low fixed rate, a second charge loan lets you keep that deal and only pay a higher rate on the additional amount you need. Remortgaging would replace the entire balance at today's rates.
When is remortgaging the better option?
Remortgaging is usually better when your current deal is ending, rates have fallen, or you want the simplicity of a single mortgage payment. Here are the key scenarios where it makes more sense:
What if your current mortgage deal is ending?
If your fixed-rate or introductory period is coming to an end, you would typically be moving to your lender's standard variable rate (SVR) anyway. This is the natural time to remortgage, and adding extra borrowing at this point usually makes financial sense since there are no ERCs to pay.
What if better mortgage rates are available now?
If current mortgage rates are lower than your existing rate, remortgaging could save you money on your entire mortgage balance while also allowing you to borrow more. In this scenario, you benefit from a lower rate on everything you owe.
Is it simpler to have just one mortgage payment?
Having a single mortgage with one lender and one monthly payment is simpler to manage than two separate agreements. If convenience matters to you and the numbers work out, remortgaging keeps everything in one place.
Could remortgaging cost less overall?
First mortgage rates are typically lower than second charge rates. If there are no ERCs to pay and you can secure a competitive rate, remortgaging may cost you less in total interest over the term of the loan.
How do the costs of a second charge and remortgage compare?
The total cost depends on your interest rates, early repayment charges, arrangement fees, and the amount you need to borrow. Here are the key costs to consider for each option:
- Interest rates — second charge loan rates are typically higher than first mortgage rates. However, with a second charge, you only pay the higher rate on the additional borrowing, not your entire mortgage balance.
- Early repayment charges — if you are in a fixed-rate period, ERCs on your existing mortgage could add thousands of pounds to the cost of remortgaging. A second charge avoids these entirely.
- Arrangement fees — both options may involve fees. Remortgage deals may come with arrangement fees, while second charge loans may have broker fees and lender fees. Compare these carefully.
- Valuation and legal costs — both options typically require a property valuation and legal work, though the costs may differ.
- Total cost over term — the most important comparison is the total amount you will repay over the life of the loan, including all fees and interest. A broker can help you calculate this for both options side by side.
For more detail on what rates you might expect, see our guide to second charge loan rates.
How do you decide which option is right for you?
The right choice depends on your current mortgage rate, whether you face early repayment charges, and how quickly you need the funds. To decide, consider asking yourself these questions:
- Am I currently in a fixed-rate period with ERCs?
- Is my current mortgage rate lower than what I could get today?
- Has my credit score changed since I took out my mortgage?
- How much do I need to borrow relative to my mortgage balance?
- How quickly do I need the funds?
In many cases, the answer is not immediately obvious, which is why speaking to a qualified broker can be so valuable. A good broker will compare both options for your specific circumstances and help you understand the total cost of each. You can start by running the numbers yourself with our second charge calculator and mortgage calculator.
- A second charge keeps your existing mortgage untouched; a remortgage replaces it entirely.
- If you are in a low fixed-rate deal with ERCs, a second charge is often the cheaper route.
- Remortgaging is usually better when your current deal is ending and you can secure a competitive new rate.
- Always compare the total cost over the full term, not just the headline interest rate.
- A qualified broker can model both options for your exact circumstances and recommend the best path.