For homeowners carrying multiple high-interest debts, remortgaging or taking an additional advance against their property can sometimes reduce monthly outgoings and simplify repayments. Instead of managing several credit cards and personal loans at different rates, the balances are folded into a single mortgage payment, often at a lower rate than unsecured borrowing typically attracts.

That said, this is not a straightforward decision. Consolidating into a mortgage converts unsecured debt into debt secured against your home, changes the terms of your existing mortgage, and can increase the total amount you repay over time. This guide explains how mortgage-based consolidation works, what the costs and risks look like in practice, and what to weigh up before making any decisions. It is for informational purposes only and is not financial or mortgage advice. Whether this approach is appropriate will depend entirely on your individual circumstances.

What Does Using a Mortgage for Debt Consolidation Mean?

Debt consolidation loans can take several forms. Mortgage-based consolidation is one of the more significant: it involves adding existing unsecured debts, such as credit cards, personal loans, or overdrafts, to your mortgage so that they are repaid as part of a single secured loan over time.

The key distinction from other consolidation methods is that the debt becomes secured against your property. What was previously a credit card balance, where the consequences of non-payment include credit file damage and potential court action, becomes part of a loan where your home can be repossessed if you cannot keep up repayments. That is a material change in the nature of the debt and one that deserves careful consideration before proceeding.

This approach is sometimes confused with equity release, which is a distinct product designed specifically for older homeowners who want to access property wealth in or near retirement and which carries its own separate set of rules and risks. Mortgage-based consolidation is typically carried out through a remortgage or an additional advance from an existing lender, and is generally available to standard mortgage holders who have sufficient equity in their property and can demonstrate affordability.

How It Works in Practice

There are two routes homeowners typically use when consolidating debt into a mortgage. The first is remortgaging: switching to a new mortgage deal, either with the current lender or a new one, at a higher loan amount. The difference between the old mortgage balance and the new one is used to pay off the unsecured debts. This may involve moving to a new fixed or variable rate product, and in some cases moving to a new lender entirely.

The second route is an additional advance, sometimes called a further advance, where you stay with your existing lender and borrow more on top of your current mortgage. This can be simpler than a full remortgage, but the additional borrowing may be priced at a different rate to your main mortgage balance. It is worth clarifying exactly what rate applies to the additional amount before proceeding, as the two portions may carry different terms.

In both cases, the outcome is a single mortgage payment that covers your original home loan plus the consolidated debt. The term, meaning the number of years over which you repay, may remain the same or extend, depending on what you agree with the lender. Our step-by-step guide to how to consolidate debt covers the broader mechanics in more detail, though the mortgage-based route adds the property security considerations discussed here.

The Potential Benefits

The main appeal of mortgage consolidation is the interest rate differential. Mortgage rates have historically tended to be lower than the rates attached to credit cards and personal loans, though the gap varies depending on your credit profile, the size of the loan, your LTV ratio, and conditions in the lending market at the time you apply.

Where that gap is significant, folding high-APR debts into a lower-rate mortgage can meaningfully reduce the monthly interest cost. For some households, it also simplifies budgeting: instead of tracking multiple direct debits to different lenders with different payment dates, there is one mortgage payment each month. That alone is not a reason to proceed, but it is a genuine practical benefit for some people.

A further potential advantage is cash flow. Even where total repayment cost increases over time, spreading payments over a longer term can release money each month that was previously absorbed by minimum credit card repayments. Whether that matters in a given household’s circumstances will vary, but it is worth understanding as part of the full picture.

Risks and Drawbacks

The single most significant risk is that your home becomes collateral for what was previously unsecured debt. Missing payments on a credit card is serious and can lead to a County Court Judgement, but it does not in itself put your home at risk. Missing payments on a mortgage, or on any loan secured against your property, can ultimately lead to repossession. This applies regardless of how the mortgage balance is made up.

The second major risk is cost over time. Mortgage terms are long. If £15,000 of credit card debt is added to a mortgage with 20 years remaining, that balance may be repaid over two decades rather than the three or four years it might otherwise take to clear. Even at a lower interest rate, the cumulative interest on that portion over a long term can substantially exceed what you would have paid clearing the cards on their original schedule. The chart below illustrates how cumulative interest builds differently depending on term length. The same principle applies when comparing a short-term debt payoff against folding a balance into a long mortgage term.

Remortgaging also involves direct costs. These commonly include an arrangement fee from the new lender, a valuation fee, and potentially an early repayment charge from your existing lender if you are still within a fixed or discounted rate period. Early repayment charges can be significant, in some cases 1 to 5% of the outstanding balance, and should be factored into any calculation of whether the consolidation genuinely produces a saving.

Finally, if the additional borrowing pushes your loan-to-value (LTV) ratio higher, you may find that the rate available on the new mortgage is less favourable than your existing deal. Moving from 60% LTV to 75% LTV, for example, can push you into a higher rate band, which reduces or eliminates the expected benefit. Our guide to understanding LTV ratios for secured loans explains how lenders use LTV in their pricing decisions.

Mortgage Debt Consolidation: Risks and Benefits at a Glance

The risks in the right-hand column are not reasons to automatically rule out this approach. But they are specific, and in the case of repossession risk, they are material in a way that unsecured debt is not. Anyone seriously considering this route should read our article on what happens if you cannot repay a secured loan for a clear picture of how lenders typically handle repayment difficulties.

Eligibility and What Lenders Consider

Lenders assessing a remortgage or additional advance for debt consolidation purposes will typically look at a number of factors. Your current LTV is important: the more equity you have in your property, the more likely a lender is to consider an application and the more competitive the rate they may offer. Lenders will generally require a minimum level of equity to remain after the additional borrowing, and this threshold varies by lender.

Income and affordability are assessed in detail. Lenders will typically want to see that your income can comfortably service the new, higher mortgage payment, and they will usually stress-test affordability against a potential rate rise. The fact that the consolidated debts will be cleared may be factored into the assessment, but the new mortgage must be sustainable on its own terms.

Credit history also plays a role. If your file shows a pattern of missed payments on the debts you are looking to consolidate, some mainstream lenders may be cautious. There are specialist lenders who consider applications in this situation, though the rates available may be higher. Our guide to debt consolidation for bad credit covers what options may be available and what lenders tend to look for.

Costs and Illustrative Figures

The calculator below lets you adjust loan amount, term, and APR to see what a repayment might look like under different scenarios. Using it to model the consolidated debt portion at different terms can help illustrate how the choice of repayment period affects both monthly cost and total interest.

To give a concrete sense of the trade-offs involved, consider an illustrative scenario. A homeowner with £20,000 in credit card and personal loan debt at a blended APR of around 20% might be making combined minimum payments of approximately £500 to £600 per month, much of which covers interest rather than reducing the balance. If they remortgage and add the £20,000 to their mortgage at an illustrative rate of 5.5% over 20 years (these figures are examples only and are not a quote, a current rate, or a guarantee of what any lender would offer), the monthly cost attributable to that portion might fall to under £150 per month.

That is a significant short-term reduction. But over 20 years at that illustrative rate, the total interest on the £20,000 portion would be in the region of £13,000 to £14,000. On an illustrative 3-year personal loan at 8%, the same amount might attract around £2,500 in total interest. The monthly saving comes at the cost of a much larger total repayment. This comparison does not account for remortgage fees, which would further affect the net position. Whether the monthly relief is worth the long-term cost is a question each household needs to answer for itself, but the numbers are worth working through before proceeding. You can also calculate and compare loans to model different amounts and terms side by side.

What to Consider Before You Proceed

Mortgage-based consolidation tends to suit homeowners who have meaningful equity in their property, hold debts with genuinely high APRs that a mortgage rate would materially undercut, and have a realistic plan either to overpay the mortgage over time or to clear the consolidated portion early. It may also make more sense when timed to coincide with the end of an existing fixed-rate period, to avoid early repayment charges.

It tends to be a less appropriate fit where the mortgage term is long relative to the size of the debt, where the LTV increase would push into a higher rate band, or where the household’s spending patterns would likely result in cleared credit lines being re-used. Adding unsecured debt to a mortgage while continuing to accumulate new balances on cleared cards is a pattern that can leave a household carrying both an increased mortgage and rebuilt unsecured debt simultaneously.

Before approaching a lender, it is worth building a clear picture of all the costs involved: any early repayment charges on the existing deal, arrangement and valuation fees for the new product, the rate that would apply to the consolidated portion, and the total amount repayable over the full term. A qualified mortgage broker with whole-of-market access can compare products and lenders that may not be available directly and can help model the true long-run cost rather than the headline monthly payment. For homeowners who want to reduce monthly costs without fully remortgaging, a second charge mortgage or an unsecured debt consolidation loan may be worth comparing as alternatives. Our guide to is debt consolidation right for you sets out the broader decision framework across different consolidation approaches.

FAQs

Is it cheaper to consolidate debt into a mortgage?

It depends on the interest rates involved, the fees associated with remortgaging, and, critically, how long the consolidated portion is repaid over. In monthly terms, adding high-APR debt to a lower-rate mortgage can reduce what you pay each month. But the total repayment cost over a long term can be significantly higher, even at a lower interest rate, simply because of the time involved.

The most reliable way to assess this is to compare the total amount repayable in each scenario: what you would pay clearing the debts on their current terms over a realistic payoff period, against the total cost of adding them to the mortgage including all associated fees. If the mortgage route costs more overall but frees up cash flow that the household genuinely needs now, that might still be a considered trade-off. But it should be a deliberate one, made with full sight of the numbers, rather than an assumption based on the lower rate alone.

Can I remortgage to consolidate debt if my credit score is lower than average?

Remortgaging with a below-average credit score is possible in some circumstances, but lenders will typically apply closer scrutiny and mainstream lenders may decline depending on the severity of any adverse history. The rate offered to applicants with credit issues may be higher than the advertised representative rate, which can significantly affect the expected savings from consolidation.

It is worth using a soft search eligibility tool before making a formal application, as a hard search leaves a visible footprint on your credit file and can affect your score temporarily. A mortgage broker with experience in adverse credit cases can help identify which lenders are likely to consider an application and on what terms, without requiring multiple individual applications. Our article on secured loans for bad credit covers how lenders typically approach borrowers with credit history issues in more detail.

What fees are typically involved in remortgaging for debt consolidation?

The fees vary by lender and product, but the most common ones to check for are an arrangement fee (sometimes called a product fee), a valuation or survey fee, and solicitor or conveyancing costs for the legal work involved. These can total several hundred to several thousand pounds depending on the lender and product chosen.

If you are leaving a fixed-rate deal before its end date, your existing lender may charge an early repayment charge. These are typically expressed as a percentage of the outstanding balance, commonly 1 to 5%, and can be substantial on a large mortgage. It is also worth confirming whether a broker fee applies if you are using an intermediary, as some brokers charge a fixed fee in addition to any commission from the lender. The total cost of the remortgage process should be set against the expected savings before committing, as fees alone can sometimes erode a significant portion of the projected benefit in the first year or two.

What happens if I cannot keep up with the mortgage repayments after consolidating?

Because the debt is secured against your property, falling behind on a mortgage that includes consolidated debt carries the same risk as falling behind on the original mortgage. If arrears cannot be resolved, the lender may ultimately pursue repossession through the courts. There is no separate treatment for the consolidated portion of the balance.

In practice, lenders are required by FCA regulations to treat customers in financial difficulty fairly, and will typically try to agree an alternative arrangement, such as a payment plan, a temporary reduction in payments, or a term extension, before taking legal action. Engaging with the lender early, as soon as repayments become difficult, gives the most options. Independent, free debt advice is also available from organisations including StepChange and Citizens Advice, who can help you understand your position without any commercial pressure.

Does folding unsecured debt into a mortgage affect my credit score?

The remortgage process involves a hard search on your credit file, which will be visible to other lenders for around 12 months. Closing credit card accounts or paying off personal loans as part of the process may cause a short-term fluctuation in your score, as credit reference agencies factor in account changes. Over the medium term, paying off outstanding balances is generally viewed positively.

The ongoing impact largely depends on behaviour after the consolidation. If cleared credit lines remain unused and the new mortgage is paid on time each month, the effect on your credit profile tends to be neutral to positive over time. If cleared cards are re-used and new balances accumulate, the credit impact will reflect that pattern. Our guide to debt consolidation and your credit score covers the mechanics of how consolidation affects credit reporting in more detail.

This guide is for general information only and does not constitute financial or mortgage advice. What is appropriate will depend on your personal circumstances. For advice tailored to your situation, speak to a qualified mortgage adviser who is authorised and regulated by the Financial Conduct Authority.