Quick Answer
Consolidating debt into your mortgage can reduce your monthly payments, but it can also increase the total interest you pay and turn unsecured debt into debt secured against your home. Before proceeding, check the full repayment cost, your loan-to-value ratio, any fees or charges, and whether a lower-risk alternative could be a better option.
Introduction
Paying multiple debts every month can feel overwhelming. Credit cards, personal loans, and overdrafts all take a bite out of your income. Consolidating those debts into your mortgage can reduce your monthly payments and leave you with one payment to manage.
But lower monthly payments do not always mean lower costs. Moving unsecured debt onto a mortgage often means repaying it over a much longer period. That can increase the total interest you pay. It also turns debt that is not linked to your home into secured debt against your property.
Before you make a decision, check the numbers carefully. This guide covers 10 important things every homeowner should know before consolidating debt into a mortgage, including costs, risks, lender requirements and alternatives.
What Consolidating Debt into Your Mortgage Actually Means
Debt consolidation through a mortgage means borrowing more against your home and using that money to pay off unsecured debts such as:
- Credit cards
- Personal loans
- Store cards
- Overdrafts
This can potentially be arranged through a remortgage, further advance or second charge mortgage, depending on your circumstances and lender criteria.
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The Main Risk: Unsecured Debt Becomes Secured Debt
This is the most important point. Credit cards, loans and overdrafts are usually unsecured. Once you add them to your mortgage, they become secured against your home. If you cannot keep up with mortgage payments, your property could ultimately be at risk.
10 Checks to Make Before Consolidating Debt into Your Mortgage
1. Compare Total Interest, Not Monthly Payments
A lower monthly payment does not automatically mean you are saving money.
This is the mistake many homeowners make when comparing a mortgage with credit cards or personal loans. Mortgage rates are usually lower, but the repayment term is much longer. That extra time can significantly increase the total amount of interest paid.
For example, the average interest rate on UK credit card borrowing was 21.49% in June 2026, while the average rate on new personal loans was 9.67% (Bank of England, June 2026). Those rates are much higher than most mortgage rates, but unsecured debts are often repaid over a far shorter period.
A £20,000 debt repaid over five years may cost less overall than the same £20,000 added to a mortgage and spread over 25 years. The monthly payment falls, but the total borrowing cost can increase substantially.
Compare total interest over the full term, not just the new monthly payment, because a lower rate spread over 20 to 30 years can cost more overall.
Ask the lender or broker for the total amount repayable over the full mortgage term and compare it with the total cost of keeping your existing debts.
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2. Check Early Repayment Charges
Before remortgaging, check whether your current mortgage deal includes an early repayment charge (ERC).
Many fixed-rate and discounted mortgages apply a penalty if you leave before the agreed period ends. Depending on your mortgage balance and lender, this charge can run into thousands of pounds.
It is easy to focus on the savings from consolidating debt and overlook this cost. In some cases, the ERC is large enough to reduce or even eliminate the financial benefit of remortgaging.
Do not rely on rough estimates. Get the exact figure from your lender before making any decisions.
Check for early repayment charges on your current mortgage before remortgaging, as these can wipe out the savings from consolidating.
Request a redemption statement from your current lender and ask your broker to include any early repayment charge in the overall cost comparison.
3. Get Free Debt Advice First
Before you secure debt against your home, get an independent second opinion. A debt adviser can review your finances, explain the risks and check whether a lower-risk option would work better. In many cases, homeowners focus on reducing monthly payments without fully considering the long-term cost or the impact on their home.
The UK Government recommends seeking free, independent debt advice before making major debt decisions, and MoneyHelper provides access to trained debt advisers across the UK.
StepChange is one of the UK’s largest debt charities and helped more than 546,000 clients in 2025 through its free debt advice service (StepChange, 2025).
Get free, impartial debt advice from StepChange or MoneyHelper before committing, especially if you are struggling to keep up with payments. A free advice session could highlight alternatives that do not involve putting your home on the line.
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4. Think Carefully Before Consolidating 0% or Short-Term Debts
Not every debt belongs in a consolidation mortgage. If a credit card is on a genuine 0% promotional rate, or a loan will be cleared within the next 12 months, moving it onto your mortgage could increase the amount you repay.
You would be turning a debt that is costing little or no interest into borrowing that may run for another 20 to 30 years. This is where debt consolidation calculations often become misleading. Adding every debt into the mortgage may reduce the monthly payment, but it does not always reduce the overall cost.
Look at each debt individually before deciding what should be included. Think carefully before consolidating debts at 0% or with only a short period left to run, as moving them onto a longer mortgage term could increase the overall cost.
Create a list of every debt, its interest rate and its remaining term. Then assess whether each one genuinely benefits from being included in the consolidation.
5. Have a Plan to Stop the Debt Building Up Again
Debt consolidation only works if the debt stays cleared. One of the most common problems is paying off credit cards and other unsecured borrowing with mortgage funds, then gradually building those balances up again. That can leave you with both a larger mortgage and a new cycle of debt.
The FCA has repeatedly highlighted the risk of borrowers consolidating debt without addressing how future borrowing will be managed.
Before consolidating, decide what controls you will put in place once the debts have been cleared. Depending on your circumstances, that could include:
- Reducing credit limits on existing cards.
- Freezing or locking cards that are no longer needed.
- Closing unnecessary credit accounts.
- Removing stored card details from online retailers.
- Creating a realistic monthly budget.
- Building a small emergency fund to cover unexpected costs.
There is no single approach that suits everyone. Some borrowers benefit from keeping a long-standing credit card open for credit history purposes, while others prefer to close accounts that could tempt them to borrow again.
The important thing is to have a clear plan before the consolidation takes place. Debt consolidation can provide breathing space, but lasting improvement usually comes from preventing the same borrowing patterns from returning.
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6. Check How Consolidation Changes Your LTV
Your loan-to-value ratio (LTV) has a direct impact on the mortgage products and rates available to you. As the LTV increases, lenders generally view the borrowing as higher risk, which can affect pricing and lender choice.
Adding debt to your mortgage increases the amount you borrow. Unless your property’s value has also increased, this will push your LTV higher.
For example, a borrower with a £200,000 mortgage on a £300,000 property has an LTV of around 67%. Adding £30,000 of debt would increase the mortgage balance to £230,000 and raise the LTV to around 77%.
This matters because even a relatively small increase in borrowing can move you into a different LTV band. In some cases, that may mean fewer available products or higher interest rates than expected.
Before consolidating debt, calculate what your LTV would be after the additional borrowing. Understanding how the new borrowing affects your LTV can help you assess the true cost of consolidation and whether the available mortgage options remain competitive.
7. Fix the Cause Before the Debt
Debt consolidation changes where the debt sits. It does not change the habits that created it. If credit cards were used to cover routine living costs, persistent overspending or recurring cash-flow problems, those issues need attention before any mortgage application goes ahead.
The FCA’s recent review of debt consolidation advice found examples where advisers failed to explore the reasons behind growing unsecured debt, making it unclear whether consolidation was the right solution in the first place.
Take a hard look at the previous 6 to 12 months of spending. Identify what drove the borrowing. Then put practical controls in place, such as a detailed budget, reduced discretionary spending, an emergency savings fund or lower credit limits.
Without that step, consolidation can become a temporary reset rather than a long-term solution.
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8. Consider a Second Charge Instead
A full remortgage is not always the best option. If you are locked into a competitive fixed rate and would face a substantial early repayment charge, replacing the entire mortgage could be expensive.
In that situation, a second charge mortgage may allow you to borrow additional funds while keeping your existing mortgage untouched.
This approach is commonly used for debt consolidation, particularly when the current mortgage deal is more attractive than rates available on the wider market. However, second charge mortgages often carry higher interest rates than standard mortgages and require the same careful affordability checks.
Before applying, check how much you can borrow on a mortgage and whether the additional borrowing would still fit comfortably within your budget.
The FCA recently highlighted concerns that some borrowers were being steered towards debt consolidation without a clear assessment of whether it was the most suitable option.
Before making a decision, compare the total borrowing cost of both routes, including interest, fees and any early repayment charges on your current mortgage.
9. Check Which Debts Qualify
Do not assume every debt can be rolled into your mortgage. Lenders have different rules, and some borrowing types receive far more scrutiny than others. Payday loans, gambling-related debt, recent arrears and unsatisfied CCJs often create additional hurdles.
Some lenders may also question debts that are already on 0% promotional rates or close to being repaid. The important point is that lender criteria vary widely. What one lender accepts, another may reject.
Create a complete list of your debts before applying. Include the balance, interest rate, monthly payment and remaining term. This makes it easier for a broker or lender to identify potential issues before a formal application is submitted.
Getting clarity at the start can prevent wasted credit checks and unnecessary delays.
10. Keep an Emergency Fund
Debt consolidation is not the finish line. It is the point where you need a stronger financial safety net.
Without savings, even a relatively small unexpected expense can push you back towards credit cards, overdrafts or other expensive borrowing. A car repair, boiler breakdown or sudden household bill can quickly undo the progress made by consolidating debt.
MoneyHelper recommends building an emergency fund and suggests aiming for three to six months of essential outgoings where possible. Even a much smaller starting buffer is better than having no reserves at all.
Set aside whatever is realistic after consolidation. Keep it in an easy-access savings account and treat it as protection against future borrowing, not spending money.
How Much Could Debt Consolidation Actually Cost?
The monthly payment is only part of the picture. Suppose you have:
- £10,000 on credit cards at 21.49% interest (Bank of England, June 2026)
- £10,000 on a personal loan at 9.67% interest (Bank of England, June 2026)
Your combined debt is £20,000. Now assume you add that £20,000 to your mortgage at 4.79% over 25 years, which is close to the average two-year fixed mortgage rate in July 2026 (House of Commons Library, August 2026).
| Scenario | Approx. Monthly Payment | Approx. Total Repaid |
| Existing debts repaid over 5 years | £440–£460 | £26,000–£28,000 |
| Added to a mortgage over 25 years | Around £115 | Around £34,000–£35,000 |
The mortgage option reduces the monthly payment by more than £300. However, it could add roughly £7,000–£9,000 to the total amount repaid because the debt is spread over a much longer period.
The exact figures will vary depending on your rates and term, but the principle remains the same: a lower monthly payment does not always mean a lower overall cost. Always compare the total amount repayable before making a decision.
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Get in TouchNeed Help Deciding Whether Debt Consolidation Is Right for You?
Every homeowner’s situation is different. What works well for one person could prove expensive or risky for another. Before moving unsecured debt onto your mortgage, it is important to understand the full costs, the impact on your home, and whether a better alternative exists.
At Everest Mortgage Services, we can help you assess your options, compare potential borrowing costs, and understand the implications of consolidating debt into your mortgage. Our advisers take the time to look at your individual circumstances so you can make an informed decision with confidence.
Contact Everest Mortgage Services today for personalised mortgage guidance and find out whether debt consolidation is the right move for your financial situation.
