Does a Secured Loan Affect My Mortgage?

Last updated: 11 September 2026

What stays exactly the same

A secured loan, also known as a homeowner loan or second charge mortgage, is a completely separate borrowing agreement from your existing mortgage. It has its own lender, its own rate and its own term, arranged and registered alongside your mortgage rather than instead of it.

Because of this, nothing about your existing mortgage changes when you take one out. Your rate stays the rate you agreed, whether that's a fixed deal you're part way through or a variable rate. Your remaining term stays the same. Your relationship with your existing mortgage lender, and the payment you make to them each month, carries on exactly as before.

What does change

Three things change when a secured loan is added. First, your total monthly outgoing on the property rises, because you're now making two separate payments, one to your existing mortgage lender and one to the secured loan lender, rather than one combined payment.

Second, your total secured debt against the property increases. Even though the two agreements are separate, both are secured against the same home, so lenders, and eventually you, need to think about the combined total rather than either loan in isolation. Third, if you come to remortgage in future, any lender you apply to will factor in the second charge when assessing your application and your overall borrowing against the property, even though it's a different loan to the one they'd be offering.

It's also worth being clear about what doesn't change alongside this: your legal ownership of the property is unaffected, you don't need a new survey of the whole home just because a second lender is involved, and your day to day dealings with your existing mortgage lender, statements, online account and all, continue exactly as before. The secured loan lender deals with its own loan; your mortgage lender deals with its own.

Getting your existing lender's consent

Before a second charge can be registered, your existing mortgage lender needs to give their consent, since they hold the first charge on the property and the new loan is being registered behind them. This is a standard, well established part of the process, not a discretionary favour, and in most cases it's handled by your broker and solicitor rather than something you need to chase yourself.

Lenders generally agree to this as a matter of course provided your existing mortgage payments are up to date. It's a genuine step in the timeline though, and one reason a second charge application can take a little longer than a same-day decision, so it's worth factoring in when you're planning ahead.

There's usually a small administration fee your existing lender charges for issuing this consent, which your broker will tell you about upfront rather than it appearing as a surprise later. Beyond that fee, and the short wait while consent is processed, your existing lender has no further say in how the secured loan is used or how it's repaid, that side of the arrangement sits entirely between you and the secured loan lender.

How the extra payment could compare

To see what the numbers might look like, here's a simplified example using the fixed illustrative rates used throughout this site, not a live quote.

	Amount
Current monthly payments (credit cards and a personal loan)	£360/month
New secured loan payment (£12,000 at 7.9% over 15 years)	£113/month
Total repayable over the 15-year term	£20,340

This new payment sits alongside your existing mortgage payment, which doesn't change at all, rather than replacing it. As with any consolidation route, the total repaid over the full term is higher than the amount borrowed, because it's spread over more years than the original debts would have run for.

Why this matters if you remortgage later

When your current fixed rate ends and you come to remortgage, whether that's with your existing lender or a new one, they'll look at your total borrowing secured against the property, not just the mortgage they're being asked to take on. A second charge sitting behind your mortgage is part of that picture, and can affect the loan-to-value calculation and, in some cases, the rate or amount you're offered.

In practice, many homeowners choose to combine both loans into a single mortgage at that point, if the numbers work out, effectively repaying the secured loan as part of a larger remortgage once their fixed rate is free to move. Others simply carry on with two separate agreements for as long as it suits them. Neither approach is automatically right, it depends on the rates available at the time, how much of the secured loan remains, and whether an early repayment charge or exit fee applies to either loan.

This isn't a reason to avoid a secured loan if it's otherwise the right option, but it is worth discussing with a broker at the time you take one out, so you understand how it's likely to be viewed when your current deal ends. Our guide comparing a secured loan with remortgaging looks at this trade-off in more depth.

What this means for your day-to-day budget

Beyond the mortgage mechanics, the practical change is simply that you're budgeting for two payments instead of one from the point the secured loan starts. Many homeowners find this still comes out lower overall than the combined minimum payments on several credit cards and loans it's replacing, but it's worth checking your full monthly picture, not just comparing the secured loan payment to your old individual debts.

A broker will normally set out your combined monthly outgoing, mortgage plus secured loan, clearly before you commit, so there are no surprises once the new agreement is in place. Checking your options at this stage will not affect your credit score.