Refinancing Your Mortgage: How Does It Work?

Estimated Read Time: 5 Minutes

Refinancing your mortgage is the process of replacing your existing mortgage with a new mortgage deal. This is usually done to secure a better interest rate, change mortgage terms or borrow additional money against your property.

When your current mortgage deal comes to an end, such as at the end of a fixed-rate period, you will usually be automatically moved to your lender’s standard variable rate (SVR).

These rates can often be higher than the interest rates available on new mortgage deals, and refinancing can allow you to review your current mortgage to see whether there are any other deals better suited to your circumstances.

Refinancing your mortgage could help reduce your monthly repayments, change your mortgage terms or allow you to borrow more against your property.

In this article, we explain exactly what mortgage refinancing is, how the process works in practice and both the pros and cons you need to consider. Let’s begin.

 

What Is Mortgage Refinancing?

Mortgage refinancing is more commonly known as remortgaging in the UK and means replacing your existing mortgage with a new mortgage. The new mortgage pays off your existing loan, which is then closed and replaced by the new loan.

Refinancing effectively gives you a new mortgage agreement, and with this new agreement you can access new interest rates, product terms and repayment conditions.

Crucially, refinancing your mortgage is different from a product transfer, where you switch to a new deal with your current lender without replacing the mortgage, or porting, where you take your existing mortgage deal with you when moving home.

This distinction is important because refinancing involves applying for a new mortgage with a new lender. As such, the new lender will need to assess your income, affordability, credit history and property before deciding whether to approve your application.

As such, refinancing can offer homeowners much more than just the opportunity to change their mortgage rate. Ultimately, you are reviewing your existing borrowing and arranging new mortgage terms, which can affect your monthly repayments, overall mortgage costs and how long you have left to repay the loan.

 

See What Our Clients Have To Say...

How to Refinance a Mortgage: Step-by-Step

To refinance a mortgage, you will need to find a suitable mortgage with a new lender and submit a new application. The lender will assess your finances and property before issuing a mortgage offer, after which the legal work can be completed to repay and replace your existing mortgage.

1. Contact a Mortgage Broker

The first step is to speak with a mortgage broker about your current mortgage and what you would like to achieve by refinancing. A mortgage broker will be able to review your current mortgage, discuss the options available and highlight any potential issues before searching for a new deal.

2. Send Your Income Documents

As refinancing involves a new lender, you will typically need to provide documents that allow both the broker and lender to verify your income and financial circumstances. The exact documentation you need to show proof of income will depend on how you earn your income, but generally this will include a combination of payslips, bank statements, accounts or tax documents.

3. Your Broker Researches the Market

Your broker can then compare available mortgage products against your circumstances and requirements. This includes evaluating different interest rates, product terms, product fees, early repayment charges and the overall cost of the mortgage.

4. Obtain an Agreement in Principle

Once a suitable lender has been found, you may obtain a mortgage agreement in principle (AIP). This provides an initial indication of whether the lender may be prepared to lend the amount required to cover the refinance. AIPs are subject to a full application and further checks.

5. Submit the Full Mortgage Application

Your broker will then submit your new mortgage application to your chosen lender, along with any additional information or supporting documents that are required. The lender will then begin its formal assessment.

6. Property Valuation

The lender will need to establish the value of your property. Depending on the lender and property, this may be completed through an automated or desktop valuation rather than requiring a physical visit from a valuer.

7. Underwriter Review

The lender will review your application against their criteria, checking your income, affordability, credit history and supporting documents. In the case that any further information is required, they will usually request this before making a decision.

8. Receive Your Mortgage Offer

If your mortgage application is approved, the lender will issue a formal mortgage offer confirming how much they are willing to lend and the terms of your new mortgage.

9. Complete the Legal Work

A solicitor or conveyancer completes the legal work required to replace the existing mortgage. This includes arranging for your current lender to be repaid and registering the new lender’s charge against the property.

10. Completion

On the completion date, the funds from your new mortgage are transferred to repay your previous lender and close your old mortgage. Your new mortgage will then take effect, completing the refinancing process.

 

Need Help Refinancing Your Mortgage?

Get free advice and compare refinancing deals from across the mortgage market.

How Long Does It Take to Refinance a Mortgage?

Refinancing a mortgage takes around 4 to 8 weeks from submitting your application through to completion. The exact timeframe can vary depending on how quickly you, your broker, the lender and the property valuer complete each stage.

As there are several parties involved, even small delays can affect how quickly your application progresses. This includes how organised you are at providing the required documents, how efficiently your mortgage broker manages the application and how long the lender and property valuer need to complete their checks.

Some parts of the process can now also be completed automatically, which can make straightforward applications considerably quicker. Certain lenders can use Open Banking to verify your income instantly, while your property may qualify for an automated valuation rather than requiring a physical inspection.

As a result, applications that clearly meet the lender’s criteria could progress to a mortgage offer very quickly. Whereas, more complex cases that require additional documentation or a physical property valuation, will naturally take longer to assess before an offer can be issued.

Primary Alt Text Option (SEO & Accessibility Balance) Illustration of a smiling woman on a phone call discussing mortgage refinancing options.

What Are the Pros and Cons of Refinancing?

Refinancing can help you secure a more suitable mortgage deal, avoid moving onto your lender’s standard variable rate (SVR) or borrow more against your property. However, refinancing can also involve early repayment charges, additional fees and a new affordability assessment.

While refinancing your mortgage can offer a host of different benefits and opportunities, it is also important to compare the total cost against the overall gain.

For example, a lower interest rate may look very attractive, but if you have to pay early repayment charges in order to switch to a lower rate, the actual savings could turn out to be much smaller than you initially expect.

For example, on a £200,000 repayment mortgage with 25 years remaining:

  • Current Mortgage: 5% SVR = £1,228 per month
  • New Refinance Deal: 2% fixed rate = £1,078 per month
  • Monthly Difference: £150 (£1,800 over 12 months)
  • Upfront Costs: £999 arrangement fee + £300 valuation fee = £1,299

In this example, the reduction in monthly repayments would amount to approximately £1,800 over the first 12 months. After accounting for the £1,299 in upfront costs, that would leave a net first-year saving of approximately £501.

Of course, the potential savings are only one part of the decision. The table below summarises the main advantages and disadvantages of refinancing your mortgage:

 

Pros and Cons of Refinancing Your Mortgage
Pros Cons
Potential to secure a more suitable mortgage deal Early repayment charges may apply if you refinance before your current deal ends
Avoid moving onto your lender’s standard variable rate Arrangement or product fees may apply to the new mortgage
Raise additional money against your property Legal costs may apply
Access mortgage deals from other lenders A new affordability assessment will be required
Choose mortgage terms that better suit your plans Your mortgage application could be declined

 

The most common reason that homeowners choose to refinance is to access a deal that is now much more suitable than their previous mortgage. This usually is linked to saving money through a lower interest rate or changing the terms of your mortgage.

With that said, it is important to consider the available products and interest rates that are now available. Depending on when your mortgage was completed, your previous deal may have been secured at a time where rates were lower. In these cases, refinancing will not necessarily mean that you will be able to secure a better rate than you currently have.

A top tip is to compare between the new deals available when you refinance and the alternatives available from your existing lender.

Refinancing can also allow you to increase your borrowing, provided you have enough equity in your property and can afford the additional mortgage. As you repay your mortgage over time, you will usually build equity in your home, which may give you greater scope to borrow against it when refinancing.

This could allow you to raise money for home improvements or consolidate existing debts, however, it’s important to note that borrowing more will increase your mortgage balance and could increase the total amount of interest you pay.

There are also costs to factor into the decision. Refinancing before your current deal expires could result in an early repayment charge (ERC), while arrangement fees and legal costs may apply to the new mortgage.

Finally, refinancing means completing a new mortgage application with another lender. As such, you will need to meet their current affordability and lending criteria, and there is no guarantee that your application will be accepted.

Whether refinancing will leave you better off depends on your existing mortgage and the deals available when you apply. For this reason, speaking with a mortgage broker can help you compare your options and understand the overall cost before proceeding with a full application.

When Is the Best Time to Refinance?

The best time to refinance is usually towards the end of your current mortgage deal. Starting the process around six months before your existing deal expires gives you time to explore your options and potentially secure a new mortgage in advance.

Starting six months before your deal ends can provide you with all the time you and your broker will need to compare the different mortgages available and complete the application process without the need to rush.

We generally recommend starting the refinancing process around six months before your current deal expires. As many mortgage offers can remain valid for up to six months, this may allow you to secure a rate in advance and avoid moving onto your lender’s SVR.

Gerard Boon Managing Director (B.A Hons, CeMAP, CeRER)

It’s important to note that the length of time your mortgage offer lasts will vary between lenders and products. As such, six months should be used as a helpful starting point rather than an absolute deadline.

A mortgage broker can always help check how long a particular offer will last and can plan your new mortgage application around the end date of your current deal.

Can I Refinance a Mortgage With Bad Credit?

Yes, it is possible to refinance a mortgage with bad credit. However, you may have fewer mortgage deals to choose from or face higher interest rates, depending on your credit history, affordability and the lending criteria you meet.

“Bad credit” is an umbrella term that could cover anything from missed or late payments through to defaults, County Court Judgments (CCJs) and other more serious credit problems. For this reason, there is no absolute answer as to how adverse credit will affect your refinancing options.

In practice, lenders will consider your individual circumstances when you apply. This will naturally include the type of credit issue, how much was involved, when it occurred and whether or not it has since been resolved. Additionally, your income, existing debts, affordability and the amount of equity you hold in your property can also affect which lenders and deals may be available.

Having bad credit does not automatically prevent you from refinancing. Depending on the type and amount of adverse credit, you may have access to fewer lenders, products, and the interest rates available could be higher.

If you are unsure how to refinance a mortgage with bad credit, working with a mortgage broker can help you identify which lenders are most likely to consider applications from borrowers with bad credit.

Can I Refinance My Mortgage With the Same Lender?

Switching to a new mortgage deal with your existing lender is known as a product transfer rather than refinancing. Staying with the same lender can often be a simpler process, but you will be limited to the mortgage products and rates that they offer.

A product transfer can be a much simpler process than refinancing with a different lender. This is mainly because you will not usually need to complete the same affordability checks or legal work required when choosing to refinance with a new lender.

With that said, choosing the simplest option does not mean that you will secure the mortgage that is most suitable for you.

Before choosing to switch mortgage deals with your current lender, it is worth comparing the wider market and evaluating all of the options that are available to you. For example, another lender may be willing to offer a more competitive interest rate, lower fees or mortgage terms that are simply better suited to your circumstances.

Your future plans and property goals are also important. You may want to increase your borrowing, change the mortgage term or move home during your next deal. Your existing lender may not be able to make a competitive deal for what you want to do next.

Comparing both routes and understanding all of your options can help you understand whether staying with your lender or refinancing elsewhere will offer you the better value overall.

How Can a Dedicated Mortgage Broker Help?

A mortgage broker can review your existing mortgage, compare refinancing deals from different lenders and calculate whether switching could leave you better off after any fees or charges.

A quick glance at a lower interest rate might immediately catch your attention, but it doesn’t necessarily mean that you will be saving money by refinancing. A mortgage broker can help you look at the full picture, evaluating product fees, early repayment charges and mortgage terms to identify which options could offer the best value overall.

At Boon Brokers, our expert advisers have whole-of-market access to more than 90 lenders and thousands of different mortgage products. We can compare your refinancing with all the options available from your existing lender and the wider market, to ensure you get the mortgage that matches your needs.

You will be assigned a dedicated broker who will manage your case from start to finish. This includes managing your application, communicating with the different lenders and keeping you informed every step of the way.

Our mortgage advice is completely fee-free, meaning you do not need to worry about paying us a broker fee for our advice or for arranging your new mortgage. We are here to help you find a refinancing deal that works for you.

 

Need Mortgage Advice?
Submit an Enquiry

 

     

    Frequently Asked Questions

    Can You Refinance a House That Is Paid Off?

    Yes. It is possible to take out a mortgage on a house that you fully own, however, this would be called an unencumbered mortgage. The amount you can borrow will depend on factors such as the property’s value, your income, affordability and the lender’s criteria.

    How Often Can You Refinance a House?

    There is no fixed limit on how often you can refinance a house. But refinancing repeatedly may involve early repayment charges, product fees and other costs, and so it is always best to consider whether the financial benefit outweighs the cost each time.

    What Happens When You Refinance Your House?

    When you refinance, you take out a new mortgage with a different lender to repay and replace your existing mortgage. Once the process is completed, your previous mortgage is closed and the new mortgage takes effect under its agreed interest rate, term and repayment conditions.

    Can You Refinance a Mortgage After Divorce?

    Yes. You can refinance a mortgage after divorce, particularly if one person plans to remain in the property and take over the mortgage in their sole name. The new lender will assess whether that person can afford the mortgage independently, including any additional borrowing needed to buy out their former partner’s share of the property.

    How Soon Can You Refinance a Mortgage?

    While there is usually no strict legal period that you must wait before refinancing, some lenders may include additional terms into their agreements, such as minimum ownership or mortgage-age requirements. The most common cost of refinancing early is an early repayment charge (ERC), so it is important to check whether any of these costs would apply before leaving your current mortgage deal.

    Does Credit Card Debt Affect Mortgage Refinancing?

    Yes, credit card debt can affect refinancing because lenders will consider your outstanding debts and monthly commitments when assessing affordability. Having credit card debt does not necessarily prevent you from refinancing, but larger balances or repayments could affect how much you can borrow and the mortgage options available.

    Jack Freestone

    I’m an established content writer at Boon Brokers, where I write and publish financial and mortgage-focused content across the UK property and lending marketplace. My work covers topics including first-time buyers, remortgaging, equity release, and wider market developments affecting borrowers. I hold a Master’s degree in English Literature from the University of Bedfordshire, graduating with distinction. Since then, I’ve worked across freelance, agency, and in-house roles, building experience writing across a range of subjects, with a focus on topics that directly affect everyday consumers. Today, my writing focuses on making complex financial topics clearer, more practical, and easier for everyday readers to understand.