The Advantages
There are genuine benefits to consolidating debts into your mortgage:
- Lower monthly payments — mortgage rates are significantly lower than credit card and loan rates, so your combined monthly outgoings will usually fall
- Simplified finances — one payment to one lender instead of multiple payments to different creditors
- Reduced stress — if high monthly payments are causing financial anxiety, lower payments can provide relief
- Improved cash flow — the monthly savings can be used for essentials, savings, or overpaying the mortgage to reduce total costs
- Potential credit score improvement — paying off debts in full can improve your credit utilisation ratio
The Disadvantages
The downsides are equally important to understand:
- Higher total cost — spreading debts over a 20 to 30 year mortgage term means paying far more interest overall, even at a lower rate
- Secured vs unsecured — you're converting unsecured debts (where your home isn't at risk) into secured debt (where it is)
- Risk of re-borrowing — once credit cards are cleared, there's a temptation to run them up again, leaving you worse off than before
- Higher LTV — increasing your mortgage increases your LTV ratio, potentially pushing you into a less competitive rate band
- Early repayment charges — if your current mortgage is in a fixed or tracker period, you may face ERCs to remortgage
The Total Cost Comparison
The numbers tell the clearest story. Consider £15,000 in credit card debt at 20% APR. If you repaid it over three years, you'd pay roughly £5,000 in interest, totalling £20,000. If you added that £15,000 to a 25-year mortgage at 5%, you'd pay around £11,200 in interest, totalling £26,200.
Despite the much lower monthly payments, the mortgage route costs over £6,000 more in total. This is because interest compounds over a much longer period. The key takeaway: consolidating into your mortgage makes your monthly life easier but costs more over the full term unless you actively overpay.
Making It Work for You
If you do consolidate, the smartest approach is to use the monthly savings to overpay your mortgage. If you were paying £500 a month across your various debts and your new combined mortgage payment is only £300 more than your old one, you've saved £200 a month. Direct that £200 towards mortgage overpayments and you'll clear the extra borrowing much faster, dramatically reducing the total interest cost.
Equally important: avoid building up new debts on the accounts you've cleared. Consider closing credit card accounts or reducing their limits to remove the temptation. The worst outcome is consolidating debts into your mortgage and then accumulating new debts on top, leaving you with a larger mortgage and the same level of unsecured borrowing.
Important: Your home may be repossessed if you do not keep up repayments on your mortgage. There will be a fee for mortgage advice. The actual rate available will depend on your circumstances. Think carefully before securing other debts against your home.