Secured Loan vs Remortgage for Debt: Which Is Better?

Last updated: 11 September 2026

The core difference between a secured loan and a remortgage

A secured loan, sometimes called a homeowner loan or a second charge mortgage, is a completely separate borrowing agreement that sits behind your existing mortgage. Your current mortgage lender, rate and remaining term stay exactly as they are, and you simply take on a second monthly payment to a second lender.

A remortgage works differently. It replaces your existing mortgage entirely with a new, larger one, usually with a new lender (though sometimes the same one), that includes both your outstanding mortgage balance and the extra amount you want to borrow. From that point on you have one mortgage and one payment, but it's set at whatever rate your new deal offers, not your old one.

That single distinction, a second loan alongside your mortgage versus one bigger loan replacing it, is what drives almost every other difference between the two routes: cost, how many payments you make, and what happens to your current deal.

The fees involved also differ slightly. Both routes typically involve a property valuation and legal work, but a remortgage often includes a full reassessment of your income and outgoings against your whole mortgage balance, not just the new borrowing, whereas a secured loan application is usually assessed purely against the new amount you want to raise. Neither route is inherently cheaper on fees alone, the bigger cost difference almost always comes from the interest rate and any early repayment charge rather than the arrangement costs.

How each option affects your existing mortgage deal

This is usually the deciding factor. If you're mid way through a fixed rate mortgage, ending it early to remortgage typically means paying an early repayment charge (ERC), often a percentage of your outstanding balance that can run into thousands of pounds. A secured loan sidesteps this completely because your existing mortgage is never touched, closed or replaced.

If your current deal has already ended and you're sitting on your lender's standard variable rate, or your fixed rate is due to end within the next few months, that ERC problem often disappears, and a remortgage becomes far more worth comparing, since you may also improve your mortgage rate on the whole balance in the process.

A rough rule of thumb: the more time left on a good fixed rate, and the bigger the ERC, the more a secured loan tends to make sense. The closer you are to the end of your deal, the more a remortgage is worth a proper look.

Comparing the two side by side

	Secured loan (second charge)	Remortgage
What happens to your existing mortgage	Stays exactly as it is	Replaced with a new, larger mortgage
Number of payments	Two: existing mortgage plus new loan	One combined mortgage payment
Early repayment charge risk	None, your mortgage isn't touched	Possible if you're mid fixed rate
Typical rate	Usually higher than a remortgage rate	Usually lower than a secured loan rate
Who lends	A separate, often specialist, lender	Your existing lender or a new one
Good fit when	You're mid fixed rate with a big ERC	Your deal has ended or is ending soon

Neither column is right or wrong in general terms, it depends entirely on where you sit against the rows above. A broker will look at your specific mortgage and deal end date before recommending either.

Worked example: £20,000 of debt, both routes compared

To make this concrete, here's the same £20,000 of credit card and loan debt run through both options. These figures use fixed illustrative rates to show how the maths works, not a live quote.

Route 1: secured loan (second charge)

	Amount
Current monthly payments (cards and loan)	£460/month
New secured loan payment (£20,000 at 7.9% over 15 years)	£188/month
Total repayable over the 15-year term	£33,840

Route 2: remortgage (assuming no ERC applies)

	Amount
Current monthly payments (cards and loan)	£460/month
Increase to mortgage payment (£20,000 added at 5.4% over 20 years)	£137/month
Total repayable on the extra £20,000 over the 20-year term	£32,880

Here the remortgage looks cheaper on both counts, but that's only because no ERC applied in this example. Add a typical ERC of, say, £3,000 to £5,000 for leaving a fixed rate early, and the picture can flip entirely in favour of the secured loan. This is why the ERC figure on your specific mortgage matters more than the headline rate difference.

Typical situations each route tends to suit

A secured loan tends to suit homeowners who like their current mortgage rate and don't want to lose it, who are more than a year or two from the end of their fixed deal, or whose income or credit history has changed in a way that might make remortgaging the whole balance harder to arrange at a good rate.

A remortgage tends to suit homeowners whose fixed rate has already ended or is ending within the next few months, who could realistically improve their overall mortgage rate by remortgaging anyway, or who would simply prefer one payment and one lender rather than managing two separate agreements.

There's also a middle group worth mentioning: homeowners who are unsure how long their fixed rate has left, or who haven't checked their ERC recently. If that's you, it's worth getting the exact figure from your existing lender before ruling either option in or out, since a rough guess in either direction can point you to the wrong conclusion.

Some homeowners also have a third option worth ruling in or out first: a further advance from their existing mortgage lender, which can sometimes avoid an ERC in a similar way to a secured loan. Our further advance hub covers when that route is available.