A remortgage, further advance or second charge secures debt on your home. Consolidating unsecured debt can reduce the monthly payment while increasing total interest and putting the home at risk. Your home may be repossessed if you do not keep up repayments.

The four routes

Full remortgage: Replace the existing mortgage with a larger mortgage, using the difference after repayment and costs as released capital.
Further advance: Keep the existing mortgage and take additional borrowing from the same lender, often as a separate sub-account.
Second-charge mortgage: Keep the first mortgage and add a separate secured loan from another lender behind it.
Unsecured borrowing: A personal loan or other credit does not secure the new debt on the home, but price, term and available amount differ.

How much capital could be available?

The upper limit is constrained by the property valuation, maximum LTV for the purpose and property, affordability, credit profile and lender criteria. Existing secured borrowing and fees reduce the cash released. A simple equity calculation is not a mortgage decision.

For illustration: maximum new borrowing under a chosen LTV assumption minus the existing redemption balance, fees and any retained amount gives the potential net release. Test a lower valuation and a smaller approved loan before committing to spend the expected funds.

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Purposes and evidence

Lenders can apply different maximum LTVs and evidence rules by purpose. Home improvements may need quotations; debt consolidation can require settlement figures; a family gift can need a gift letter; a property deposit can require details of the onward purchase. Business, tax, speculative investment and ongoing-living-cost purposes can be restricted or declined. State the full purpose accurately.

Debt consolidation: monthly saving versus total cost

Moving short-term debt onto a longer mortgage term can reduce the required monthly payment because repayment is spread over more years. Even at a lower interest rate, the total interest can be higher. It also converts unsecured debt into debt secured on the home and can create capacity to borrow again.

Compare the remaining interest and fees on the current debt with the full secured-loan cost.
Model keeping the original repayment amount through mortgage overpayments, subject to allowances.
Include ERC, product, advice, valuation and legal fees in the comparison.
Decide what will happen to repaid credit limits and address the cause of recurring balances.
Use free debt advice first if the household is missing priority payments or relying on credit for essentials.

Why the existing mortgage matters

A full remortgage can replace a favourable existing rate and trigger an ERC. A further advance or second charge can preserve the first mortgage but leaves multiple parts with different rates, terms and end dates. Compare the combined cost of all borrowing over the same period and consider what happens when the first mortgage's current deal ends.

Documents to prepare

Current mortgage statement and redemption or ERC information
Income, bank statements and committed expenditure evidence
Property and lease details for the valuation
Purpose-specific quotations, statements or contracts
Details of every debt to be repaid or retained
Evidence of any expected change to income or household costs

Compare capital-raising options

Ask the broker to document total cost, all fees, alternatives and the effect of securing additional debt.

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