Further advance mortgages: understanding your options

Everything you need to know about getting a further advance

If you’re already paying a mortgage and you need to borrow more, a further advance can be an option to consider. It allows you to take additional borrowing from your existing mortgage lender, without necessarily moving your whole mortgage to a new deal.

This guide explains what further advance mortgages are, how they typically work, the main advantages and drawbacks, and how they compare with remortgaging and other ways of raising funds.

What is a further advance mortgage?

A further advance is additional borrowing taken out on top of your current mortgage. In many cases, it is set up as an additional borrowing arrangement under your existing mortgage, rather than replacing your original mortgage.

Key points to understand:

You borrow more from your current lender: The process is usually tied to your existing mortgage provider.
It may be treated as a separate part of your mortgage: The further advance can have its own interest rate, term, and repayment structure, depending on the lender.
Your original mortgage may continue: Your existing deal typically continues as before, subject to the lender’s rules and the terms of the further advance.

How further advance works in practice

While each lender has its own process, further advances generally follow a similar pattern:

You request additional borrowing based on the amount you want and the purpose.
The lender reassesses affordability: Your income, spending, and existing commitments are considered.
The lender reviews your mortgage position: This includes your payment history and the current balance.
A new arrangement is agreed: The further advance is added as an additional borrowing component, often with its own rate and term.
You receive the funds once the lender’s conditions are met.

Because a further advance is additional borrowing, it is still subject to underwriting—being an existing customer does not remove the need for checks.

Pros and cons of further advance mortgages

Potential advantages

No need to switch lenders: You may be able to avoid the process of moving your mortgage elsewhere.
May be simpler than remortgaging: In some cases, it can be quicker because you’re not replacing the whole mortgage.
You can keep your current deal: Your original mortgage terms may remain unchanged.
Useful when your main mortgage deal is still running: If you’re not ready to remortgage, a further advance may help you access funds.

Potential drawbacks

The further advance may be priced differently: The additional borrowing can carry a different interest rate to your existing mortgage.
Additional fees may apply: Arrangement, valuation, or legal costs can be part of the process.
You may end up managing multiple components: If the further advance has a different term or rate, your mortgage will effectively include more than one part.
Your overall borrowing increases: Even if the process is simpler, the long-term cost of borrowing more should be carefully assessed.

Further advance vs remortgaging: what’s the difference?

Both options can raise funds, but they work differently and can suit different situations.

Remortgaging (switching or renegotiating)

Remortgaging typically involves arranging a new mortgage deal—either with your current lender or a different one—so your mortgage becomes one unified arrangement.

Common reasons people remortgage include:

potentially securing a new interest rate
changing the term or repayment structure
consolidating borrowing into a single mortgage

Further advance (additional borrowing on the existing mortgage)

A further advance adds borrowing alongside your current mortgage.

Common reasons people choose further advance include:

accessing funds without replacing the existing mortgage deal
avoiding the complexity of switching lenders
borrowing more while staying within the current lender’s framework

Which is usually better?

There isn’t a single answer. The better option depends on factors such as:

how your current deal is performing and when it ends
the pricing and fees for the further advance compared with available remortgage options
whether you want one mortgage arrangement or multiple components
your short- and long-term plans for the property

Eligibility and what lenders typically look at

Lenders will usually consider similar themes to any mortgage application, even though you’re already a customer.

While exact requirements vary, common considerations include:

Affordability: your income, outgoings, and existing debt commitments
Mortgage payment history: consistent payments and overall conduct matter
Loan-to-value (LTV) / equity position: your equity can affect whether the lender is willing to lend and on what terms
Property and valuation: a valuation may be required to confirm the property’s current value
Purpose of borrowing: some lenders may have restrictions or preferences depending on how the funds will be used

The application process: what to expect

A further advance application is often less disruptive than a full remortgage, but it still involves checks.

Typical steps include:

Initial request: you confirm the amount you want and the intended use
Affordability assessment: the lender (or broker) reviews financial information
Valuation and property checks: depending on the lender, this may be required
Offer and legal steps: if approved, the further advance is set up under agreed terms
Completion and funds release: once conditions are met, the additional funds are released

Common uses for further advance borrowing

Further advances are often used for goals that require a lump sum while keeping the existing mortgage in place.

Common examples include:

Home improvements: renovations, extensions, or upgrades
Consolidating debts: combining certain debts into a mortgage repayment plan (where appropriate and permitted by the lender)
Property-related costs: depending on lender rules, this can include costs connected to the home
Supporting a second property plan: for example, raising funds for a deposit, subject to lender acceptance

It’s important to consider whether the purpose is suitable for mortgage borrowing and how it affects your long-term repayment commitment.

Alternatives to further advance

If a further advance doesn’t fit your circumstances, there are other routes to consider:

Remortgaging: may allow you to restructure the whole mortgage and potentially access different rates or terms
Secured loans: another option where borrowing is secured against property (terms and costs vary)
Unsecured borrowing: personal loans or credit products may be considered where you don’t want to add more secured debt

The right choice depends on the amount you need, how urgently you need it, and how you want repayments to work over time.

Questions to consider before choosing further advance

Before deciding, it can help to review:

Total cost over the full term: the interest on the additional borrowing plus any fees
How the further advance changes your monthly payments
Whether you’ll still be in the property long enough to justify the costs
Whether you prefer one mortgage arrangement or multiple components
How your current mortgage deal interacts with the new borrowing

Summary

A further advance mortgage can be a flexible way for existing homeowners to borrow more without moving lenders or replacing the entire mortgage deal. It can be convenient when you want additional funds and your current mortgage is still suitable.

However, because the further advance may carry its own rate, term, and fees—and because your overall debt increases—it’s important to compare the full picture against remortgaging and other alternatives.