Is Consolidating Debt Into My Mortgage a Good Idea?

Last updated: 11 September 2026

What 'consolidating debt into your mortgage' actually means

Consolidating debt into your mortgage means using your property to raise money that clears your existing unsecured debts (credit cards, personal loans, overdrafts), leaving you with one payment secured against your home instead of several separate payments. There are three common ways to do this: a remortgage that increases your mortgage balance, a further advance from your existing mortgage lender, or a secured loan, also called a homeowner loan or second charge mortgage, which sits as a separate agreement alongside your existing mortgage rather than being added to it.

Whichever route is used, the underlying trade-off is the same: your unsecured debts are cleared, but you now owe that money against your home instead, usually over a much longer repayment period than the original debts would have run for.

People searching for this question are often weighing up a genuinely stressful situation, several minimum payments, a shrinking buffer at the end of the month, and a nagging worry about where it's heading, against the idea of one simpler payment. That stress is real, and it's worth acknowledging before getting into the numbers, but the numbers still matter, because the right decision depends on your specific figures rather than on how stressful the current situation feels.

The case for consolidating

The most common reason homeowners consider this is a lower combined monthly outgoing. Credit cards, personal loans and overdrafts often carry high interest rates and are structured to be repaid relatively quickly, which can mean a demanding combined monthly payment. Spreading the same debt over a mortgage term, or a secured loan term, at a lower interest rate than most unsecured credit typically reduces the monthly figure noticeably.

There's also the practical benefit of one payment instead of several: no more juggling multiple due dates, multiple lenders and multiple minimum payments, which for many people reduces the day to day stress of managing debt even before any saving is considered. And because mortgage and secured loan rates are usually lower than typical credit card or personal loan rates, the interest rate itself is often genuinely better, even before the term is factored in.

The case against consolidating

The main downside is cost over time. Spreading debt over 15, 20 or 25 years instead of the 2 to 5 years a credit card or personal loan might have run for means paying interest for far longer, and that usually adds up to more total interest paid overall, even at a lower rate, than continuing with the original unsecured debts would have cost.

The second downside is what the debt becomes. Unsecured debt, by definition, isn't secured against anything specific, a lender can't take your home if you fall behind on a credit card. Once that debt is consolidated into your mortgage or a secured loan, it becomes secured against your property, so falling behind on the new, larger payment carries a more serious consequence than falling behind on the original unsecured debts did.

There's a third, quieter downside too: it can mask an underlying spending pattern rather than fix it. Clearing credit cards through consolidation only helps in the long run if the habits that built up the balances change alongside it, otherwise it's possible to end up with the consolidated payment on the mortgage and new balances building up on the cleared cards. A broker or debt adviser can help you think through this before you commit, not just the numbers.

Neither of these downsides means consolidating is a bad idea in general, but they're the things worth weighing honestly against the monthly saving before deciding.

Worked example: the monthly saving against the total cost increase

Here's the same £15,000 of unsecured debt shown two ways, as it currently stands, and consolidated into a secured loan. These figures use fixed illustrative rates to show how the maths works, not a live quote.

Before: unsecured debt as it stands

	Amount
Credit card balance being cleared (minimum payments, 24.9%)	£8,000
Personal loan balance being cleared (12.9% over 5 years)	£7,000
Current combined monthly payment	£410/month

After: consolidated into a secured loan

	Amount
Current monthly payments (cards and loan)	£410/month
New secured loan payment (£15,000 at 7.9% over 15 years)	£141/month
Total repayable over the 15-year term	£25,380

The monthly saving here is real, £269 a month less, but the total repayable of £25,380 is well above the £15,000 originally borrowed, and likely above what continuing to pay off the original credit card and loan at their existing rates would eventually have cost, had those payments been kept up at the same pace. This is the trade-off in numbers rather than in the abstract: a genuine monthly saving, set against a genuine increase in total cost.

A short checklist before you decide

Before going ahead, it's worth honestly answering a few questions. Is your current monthly payment genuinely unmanageable, or just uncomfortable? A tight but manageable budget is a different situation to payments you're structurally unable to keep up with. Have you compared the total cost, not just the monthly figure, between staying as you are and consolidating? Are you comfortable that the debt would now be secured against your home, with everything that implies if your circumstances change? And have you ruled out lower-cost options first, such as a 0% balance transfer, a free debt management plan, or simply a stricter budget, where those are realistic for your situation?

If you'd rather explore the route that leaves your existing mortgage rate untouched, our secured loans hub and secured loan vs remortgage guide cover how that compares with increasing your mortgage directly.