Second Charge Mortgage vs Remortgage vs Further Advance
A second charge mortgage adds a separate secured loan alongside your existing mortgage. A remortgage replaces the existing mortgage, potentially with extra borrowing. A further advance is additional borrowing from your current mortgage lender, usually on separate terms from the original balance.
The right comparison is the cost and suitability of the complete arrangement, rather than the interest rate on the extra money alone. All three can increase debt secured against your home, which can be repossessed if repayments are not maintained.
How do the routes differ?
| Question | Second charge | Remortgage with extra borrowing | Further advance |
|---|---|---|---|
| What happens to the existing mortgage? | Usually remains in place | Replaced by the new mortgage | Usually remains, with additional borrowing from the same lender |
| Who provides the extra money? | A separate lender | The lender providing the replacement mortgage | Your current mortgage lender |
| What needs comparing? | Existing mortgage plus new loan | Entire replacement mortgage | Existing mortgage plus additional borrowing |
| Is approval automatic because you own a home? | No | No | No |
The arrangements can have different repayment terms, deal end dates and charges. Confirm the detail of the actual offers rather than assuming all borrowing with one lender has one rate.
Start with the mortgage you already have
Write down the outstanding balance, current rate, remaining term, monthly payment, deal end date and any early repayment charge. Then identify the extra cash needed and the proposed use.
For example, a homeowner owing £220,000 who needs £25,000 is making a different decision from someone owing £60,000 who needs £80,000. In the first case, changing the price of the large existing balance could strongly affect the comparison. Neither example establishes which route wins without actual terms.
Our remortgaging guide explains the replacement-mortgage process.
When is a further advance worth checking?
Ask your existing lender whether it offers additional borrowing for your purpose and circumstances. Keeping the main loan in place may be useful, but the extra borrowing can have a different rate and its own conditions.
Ask for the further advance illustration before assuming an external loan is the only option. Equally, an existing customer offer is not automatically the best deal: it still needs comparison.
How should you compare costs fairly?
Use the same net cash requirement for each option. If you need £25,000 after fees, an offer that delivers £23,000 is not a like-for-like alternative.
Ask an adviser for a comparison worksheet covering:
- payments on every loan remaining after completion;
- fees and charges paid immediately or financed;
- total repayment over the proposed terms;
- outstanding balances at a common future date;
- what happens after any introductory rates;
- early settlement costs and overpayment flexibility.
For a two-year comparison, include any balance still outstanding after two years. Looking only at payments made can favour an arrangement that repays less capital.
Why can a lower payment mislead?
Illustration: one proposal requires £350 a month for 120 months; another requires £250 for 240 months. Multiplying the stated payments gives £42,000 and £60,000 respectively, before any separate charges.
Those are invented payment schedules, not market quotes. They demonstrate why a £100 monthly reduction cannot, by itself, establish a saving. A longer commitment may be manageable each month while costing more overall.
What if your mortgage deal ends soon?
Ask for a comparison of borrowing now and reviewing the position when the current deal ends. Waiting may avoid an early repayment charge, but the expense may be urgent and future rates are uncertain.
Do not build the decision around a guaranteed future remortgage. Your income, property value and lender criteria may change before then.
Your borrowing purpose also matters. If you want to repay existing debts, read about secured debt consolidation, including its costs, risks and alternatives. For renovation funding, see what to compare before using a secured loan for home improvements.
Make the enquiry about a comparison
Visit our remortgage hub and secured-loans hub. If you start a secured-loan enquiry, explain that you want the alternatives considered, including a further advance. Ask the adviser which options their service covers and whether separate advice is needed for any route outside that scope.
