The fundamental difference
The core distinction between these two approaches is the security attached to the debt. A personal loan is unsecured, meaning it is not tied to any asset. If you cannot repay a personal loan, the lender can pursue legal action and damage your credit score, but they cannot take your home. A remortgage for debt consolidation converts the debt into a secured obligation against your property. If you cannot keep up with the mortgage payments, your home is at risk of repossession.
This fundamental difference in risk profile should be at the centre of your decision-making process. Lower monthly payments from a remortgage come at the cost of putting your home on the line for debts that were previously unsecured.
Interest rates compared
Personal loan rates in the UK in 2026 typically range from 5% to 15% APR, depending on the amount borrowed, your credit score, and the loan term. The best rates are usually available for loan amounts between £7,500 and £25,000 with good credit.
Mortgage rates for debt consolidation remortgages typically range from 4% to 7% APR for mainstream borrowers, with specialist rates for adverse credit potentially reaching 9% to 12%. The rate depends on your LTV, credit profile, and the lender.
The interest rate difference between a personal loan and a mortgage is often smaller than many borrowers expect. While credit cards charge 20% to 30%, personal loans at 7% to 10% are not dramatically different from mortgage rates at 5% to 6%. The rate advantage of a remortgage is much more significant when compared to credit card debt than when compared to personal loan debt.
Monthly payments compared
The monthly payment difference is primarily driven by the repayment term rather than the interest rate. A personal loan typically has a term of one to seven years, with three to five years being most common. A mortgage typically has a term of 15 to 30 years.
For £20,000 of debt, a personal loan at 8% over five years costs approximately £406 per month. The same £20,000 added to a mortgage at 5.5% over 20 years costs approximately £138 per month. The mortgage option is clearly cheaper each month, but the five-year personal loan costs approximately £4,350 in total interest, while the 20-year mortgage addition costs approximately £13,100. The lower monthly payment comes at almost triple the total interest cost.
Total cost compared
This is where the comparison becomes most revealing. Despite the lower interest rate, the mortgage option almost always costs more in total because the debt is spread over a much longer period. The only scenario where a mortgage clearly wins on total cost is when you commit to making overpayments that effectively reduce the mortgage term on the consolidated debt to match the personal loan term. But if you are going to pay that much each month anyway, the question becomes: why not just take the personal loan?
The answer, for many borrowers, is cash flow. The personal loan payment of £406 per month may be unaffordable alongside other commitments, while the mortgage payment of £138 per month is manageable. In this case, the higher total cost of the mortgage route is the price paid for financial breathing room.
When a personal loan is better
- The debt is relatively small: For debts under £10,000 to £15,000, a personal loan is often the most practical option. The interest rate differential is modest, and the shorter term means significantly less total interest.
- You can afford the higher monthly payment: If the personal loan repayments fit within your budget, there is no financial advantage to stretching the debt over a longer period at only a slightly lower rate.
- You want to keep the debt away from your home: If protecting your property from the risk of repossession is a priority, an unsecured personal loan achieves this while still providing a structured repayment plan.
- You have good credit: Borrowers with strong credit scores can access personal loan rates that are close to mortgage rates, minimising any rate advantage of consolidating into the mortgage.
- Your mortgage has significant ERCs: If breaking your current mortgage deal would incur substantial charges, a personal loan avoids these costs entirely.
When a remortgage is better
- The debt is large: For debts of £20,000 or more, the monthly payment on a personal loan becomes very high over a three to five-year term. The remortgage option provides a manageable monthly payment that genuinely improves cash flow.
- You are struggling with monthly payments: If multiple debt payments are causing genuine financial hardship, the remortgage reduces outgoings immediately and provides financial stability.
- Your existing mortgage deal is ending: If you are remortgaging anyway because your deal is expiring, adding debt consolidation to the process incurs minimal additional cost.
- The debt is primarily credit card debt: The rate differential between credit cards at 20% to 30% and a mortgage at 5% is far larger than the differential between a personal loan and a mortgage. The savings are most significant when replacing very expensive debt.
- You commit to overpaying: If you plan to use the monthly savings from the remortgage to make overpayments, you can combine the lower rate of the mortgage with a shorter effective repayment period.
The hybrid approach
Some borrowers use a combination of both approaches. They consolidate the most expensive, highest-balance debts into the mortgage while keeping smaller or lower-rate debts as personal loans or managing them separately. This limits the amount of debt secured against the property while still achieving meaningful monthly savings.
For example, you might remortgage to clear £15,000 in credit card debt at 24% while keeping a £5,000 personal loan at 7% that has only 18 months remaining. This targets the consolidation where the interest saving is greatest and avoids unnecessarily securing low-rate debt against your home.
Making the right choice
A debt consolidation broker will compare both options for your specific circumstances, calculating the total cost of each approach and recommending the most effective solution. They can also identify whether a hybrid approach offers the best of both worlds.
Nesto matches you with an FCA-regulated debt consolidation broker for free with no obligation. Think carefully before securing other debts against your home. Your home may be repossessed if you do not keep up repayments on your mortgage.