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A Guide to Porting your Mortgage

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Pete Mugleston

Author: Pete Mugleston - Mortgage Advisor, MD

Updated: November 15, 2021

If you want to transfer your mortgage to another property, porting a mortgage could be the solution for you.

If you’re planning on moving and want to port your mortgage, you may be surprised to learn that your lender will need to review your current circumstances to decide whether that’s possible, and with many lenders this is almost the same as if you were making a brand new application.

If things have changed since the original mortgage was taken out, i.e. a change of income or you’ve picked up some bad credit, they can decline your application.

This can be frustrating, but the good news is that there may well be other options available.

What is mortgage porting?

Porting your mortgage is when you take your existing mortgage deal to a different property. You’ll still have the same lender, terms and interest rate, though you’ll have to repay your existing mortgage and then resume it with your new property. The amount you borrow also doesn’t have to be the same – it could be more, or less than before. There are pros and cons of porting a mortgage which we discuss in more detail.

How does mortgage porting work?

When you sell your old home and look to port your mortgage to a new one, you’d basically be re-applying for your original deal. It’s important to remember that it’s not the mortgage that transfers to the new home, but the interest rate, along with the terms and conditions.

The main considerations for the lender will be whether you can still afford the mortgage and whether their position is likely to change in terms of risk. For example, if the value of the property is different and the loan to value ratio increases, there is more risk involved and they might think twice about approving you for the same rates and terms.

How do I port my mortgage?

Contact your mortgage lender and tell them that you want to port your agreement to a new property.

As soon as you sell your home, your existing mortgage is paid off with the proceeds, even though you’re keeping your previous mortgage and staying with that lender, you’ll still have to go through the same application process as a new applicant.

This will include a valuation of the new property and new affordability checks to see if you can meet your mortgage commitments.

What happens once I port my mortgage?

Usually, your lender will require you to complete on your new home and pay off your existing mortgage on the same day.

Some will allow you to keep your current deal for a limited time before you complete, generally between 30 days and as long as three months.

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Can I transfer my mortgage to another property?

Yes, you can transfer your existing mortgage to a new property through mortgage porting. You’ll basically be applying for a new mortgage with your current lender that has the same rates and conditions as your existing one, and they will decide based on your affordability whether they will provide a mortgage for your next property.

Pros and cons of porting a mortgage

Is porting a mortgage worth it? Here are some pros and cons to help you decide on whether it’s right for you.

Advantages of porting a mortgage Mortgage porting issues
No early repayment charges as you’ll be keeping the same terms, conditions and porting mortgage rates with the same lender (this makes this product ideal for anyone whose mortgage includes hefty early repayment fees) Staying with your existing lender could mean that you’re missing out on more favourable rates on an offer elsewhere, so remortgage could be better alternative
Ideal for anyone already on favourable or fixed rates and wants to port them to their next mortgage. If you’re moving to a more expensive property, you might have to borrow additional money, which will have to be on a different rate. This can mean product end dates don’t match, which makes it awkward when remortgaging away to other lenders.

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How easy is it to port a mortgage?

The process of porting can vary from lender to lender, but in general, it is relatively straightforward and no different to a standard application.

One of the mortgage specialists we work with will be able to handle the application on your behalf regardless, to make the whole process as smooth as possible.

To decide if they are willing to lend to you, your lender will consider your application based on your income, outgoings and credit rating. The new property will also be assessed and valued.

Can I port my mortgage to a more expensive property?

This is possible in the right circumstances but may involve you applying for a larger mortgage, unless you have the cash to cover the difference.

If you’re porting and need to borrow more, then the additional borrowing is typically done on a new mortgage product, based on the lender’s available rates at the time.

If you’re putting in the cash to cover the additional cost, then the lender will likely be in a stronger position and lower loan to value (LTV), meaning the risk to the lender is lower. and there’s less chance of your having your mortgage application declined.

Porting a mortgage’s full terms and conditions and maintaining the current setup is possible, especially if your circumstances haven’t drastically changed since you took out your original mortgage.

Porting a mortgage and borrowing more

Porting a mortgage to a higher value property will involve your current lender valuing your new property and then assessing your current financial situation to help them decide whether they can increase your mortgage.

As long as you still meet eligibility and affordability criteria, most lenders will be ok with porting your mortgage and allowing you to borrow more.

They’ll look at a number of factors to assess your affordability including:

If your circumstances have changed since you first took out your mortgage, for example, you now have bad credit or perhaps a lower income, your current lender may reject your application for porting a mortgage to a more expensive house.

You could, of course, switch your mortgage to another provider (and potentially save money!) but be aware that there may be fewer lenders to choose from.

This doesn’t mean that you won’t be able to port your mortgage and borrow more though.

A whole-of-market broker, like the ones we work with, can find you a range of mortgages from lenders who will accept factors like bad credit, change of job or a mortgage with low income.

Porting a mortgage to a cheaper house

Porting your mortgage to a cheaper property can be relatively straightforward because you’re not applying to borrow more money.

Despite this, you’ll still have to go through the mortgage application process which may have become stricter since you took out your original mortgage.

That said, if the loan amount is staying the same but the property value is reducing, the lender may block the move if they consider their position at greater risk, as the loan to value, will increase.

For example:

If the property was worth £200k, with a £150k mortgage your loan to value is 75%.

If you want to port to a property for £175k, then the loan to value increases to over 85%.

Many lenders will see this as a problem, and only approve the port if the loan to value is maintained at 75%, meaning that the borrower would need to reduce the mortgage to £131,250 and therefore have to repay £18,750.

Porting a mortgage when downsizing and paying some of the mortgages off in this way, can be a great way to reduce monthly mortgage payments, especially for homeowners who are now on a lower income.

Porting a mortgage with bad credit

What happens when you want to port a mortgage but have bad credit? Lenders view borrowers with bad credit as a higher risk and can ask for a bigger deposit or even reject an application.

High street banks won’t usually consider a borrower who is porting mortgages with recent credit issues.

However, as they already have the debt in place, if the mortgage is just moved to a new property, and the risk to the lender doesn’t change (or improves their position if the loan to value reduces), they may still consider it.

If the application to port the mortgage is declined due to bad credit, there may well be other bad credit mortgage lenders happy to approve a brand new mortgage, depending on what the issues are and how recently they occurred.

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Can porting a mortgage be affected by property type?

Porting a mortgage to an unusual or non-standard property can be seen as a higher risk for most lenders. They’ll want to know if a property is good security for the loan, so in the unfortunate event of repossession, they can resell it easily.

The worry is that the more unusual the property, the more limited the market, so many porting mortgage rules either don’t allow for unusual or specialist properties.

Such properties include:

This is often the case with big banks as they have strict porting mortgage lending criteria so they may reject an application for an unusual property, especially one that is uninhabitable. Lenders might ask for a larger deposit in these cases to offset the risk, so it isn’t always impossible to transfer your mortgage to another property.

How does income affect porting a mortgage?

You may find that lending criteria is stricter since you took out your first mortgage and this can affect how much you are able to borrow.

To work out how much they can lend you, most lenders calculate affordability using a more complex model these days, but in general they will cap loans to a multiple of your earnings.

Most will cap at 4.5x annual income (so someone earning £25k would not be able to borrow more than £100k), some will offer up to 5x income, and a handful even up to 6x income in the right circumstances.

What also plays a part is the type of income you earn (some lenders offer mortgages with bonuses and commission factored in), and the amount of other financial commitments you have. The more variable or less reliable the income, the fewer the lenders, and if you’re applying for the mortgage with debt, the less a lender will be prepared to offer you.

How does my employment affect my mortgage porting?

If you’re employed, lenders will want to know if your income is a set basic wage, salary or whether your income varies. As well as how much you earn in salaries or wages, they will also look at your bonuses to assess your overall income.

Maternity leave

You may find that porting a mortgage on maternity leave can be problematic because the dip in earnings will affect your overall income for that year. Some lenders will take your previous year’s income into consideration but others may see the fluctuation in income as a risk for affordability.

Starting a new job

Porting a mortgage with a new job can also be tricky as some lenders see homeowners in new employment as high risk too. This is because if the new job role doesn’t work out, the income and ability to service the mortgage may stop. Some lenders prefer applicants to have been in employment for one or two years as this suggests some security within their employment.

Being unemployed

If you were recently made unemployed, this is likely to mean that your application will be rejected unless you have another job lined up. If you have a contract in place but have not yet started, it may be possible. However, lenders may prefer to wait until your job has started.


If you’re looking for a mortgage while self-employed, most lenders will need proof of three years trading although there are some who will ask for two, a few one, and a handful will consider just 9 months.

Retired or nearing retirement

If you’re near the end of your mortgage term and have income to comfortably pay off the rest of your mortgage plus other expenses, your current lender may take this into consideration.

If you’re looking for a new lender, it could be harder as there are fewer lenders who will consider older applicants. It’s also handy to know that some lenders cap the maximum age for an application and can also consider how old you’ll be at the end of the mortgage term to decide on whether they’ll accept you or not.

In terms of upper age limits, some mortgage providers won’t lend to borrowers over 75, with others the maximum age is 85, and a minority will impose no age limit as long as they can be very confident you will be able to continue paying off the mortgage during your retirement years.

If you have savings and can pay off part of your mortgage early, you could consider porting part of your mortgage. This would leave you with less to pay on your mortgage and could increase your chances of approval.

Speak to a mortgage porting expert

We work with brokers across the UK who can find you the best porting mortgage rates as well as help you through the process of porting your existing mortgage with your current lender.

If you have questions and want to speak to an expert for the right advice, call 0808 189 2301 or make a quick online enquiry.

We’ll match you with an expert who will be able to answer all your questions and help you find the right mortgage solution. Saving you time, money and hassle.

The service we offer is free and there’s no obligation, or marks on your credit rating.


How long does porting a mortgage take?

If your lender lets you take your existing mortgage rate and terms with you, and you complete within a certain time period, generally speaking, porting a mortgage can take between 30 days to 3 months.

Can I port a negative equity mortgage?

If the sale of your house doesn’t cover your mortgage repayments, you may be left with negative equity.

It’s unlikely you’ll be able to transfer your negative equity to your new property with most lenders. You will need to pay a deposit for the new property and this will vary depending on many factors including the lender, amount borrowed on the new mortgage and your credit and affordability.

Can you port a Help to Buy mortgage?

Yes, but your Help to Buy loan will need to be paid off with the proceeds from the sale of your current house.

Porting Buy to Let mortgage

Porting a Buy-to-Let mortgage works in a similar way to a mortgage port for a residential deal. You’ll need to apply for a new mortgage with your lender and then, once this is approved, they can consider letting you transfer your current mortgage rates and conditions over to the new property.

Porting an interest only mortgage

Some lenders will allow their customers to port their interest-only mortgage if they can prove that they have an acceptable mortgage repayment strategy in place. If you want to port an interest-only mortgage, you’ll still have to undergo the same credit checks as you would with a residential mortgage.

Porting a shared equity mortgage

The process of porting a shared equity mortgage is similar to porting a residential deal.

When you sell your current property, the proceeds of the sale will be used to pay off your current mortgage and you will also pay back your shared equity loan. You will then need to apply for a mortgage with the same lender you’re currently with. If your current lender is happy to mortgage your future property, then you can port your mortgage.

How much does it cost to port a mortgage?

The best thing to do, if you’re thinking about porting your mortgage, is to ask your current lender about your porting mortgage terms and conditions. Sometimes lenders might apply porting mortgage early repayment charges.

One of the advisors we work with can help you with this and will also check if there is a cheaper, alternative mortgage product that might be better suited to your needs and circumstances.

Porting mortgage fees can include:

  • Penalty fees.
  • Early repayment charges.
  • Solicitor fees.
  • Mortgage broker fees.

As well as the associated costs that come with mortgage porting, remember to calculate how much your new property could cost you.

Your expenses could include:

  • Repair and maintenance costs.
  • Mortgage payment protection insurance/porting mortgage insurance.
  • Building, contents and life insurance.
  • Removal costs.
  • Service charges if you purchase a leasehold property (usually for flats and some new builds).

Can I port my mortgage overseas?

UK lenders are not likely to approve you porting a UK mortgage to property overseas.

Porting a mortgage abroad that is already on a property in another country is different than porting a mortgage in the UK, and this will differ depending on the lender and the country.

Speak to an overseas mortgage specialist for more on this. Call us on 0808 189 2301 and we’ll introduce you to an expert with the right knowledge to help you understand all your options and find the right mortgage solution at the best available price.

What should I do if my lender rejects my mortgage porting application?

If your lender declines your request to port your mortgage you may be able to appeal their decision.

If they don’t agree, you’ll need to find a new lender who will be more likely to approve you based on your circumstances. The advisors we work with can help you with this and give you the right advice on what options are available to you.

Call 0808 189 2301 or make a quick online enquiry and we’ll connect you with one of the brokers we work with. All the experts we work with are whole-of-market brokers with access to mortgage lenders across the UK.

They’ll be happy to answer your questions and will help you understand all your options based on your own set of unique circumstances.

Should I use a mortgage porting calculator?

There are mortgage porting calculators available, but because there are so many variables involved with porting a mortgage, which could include changes in circumstances (such as a change in income, employment circumstances or adverse credit) the use of a calculator is limited and can only give a rough guide at best.

The key to truly understanding mortgage porting is to get the right advice for your situation. The advisors we work with can take you through the various options to give you a guide on how much you could borrow with each different lender and how much you can expect to pay if there are any fees.

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About the author

Pete, an expert in all things mortgages, cut his teeth right in the middle of the credit crunch. With plenty of people needing help and few mortgage providers lending, Pete found great success in going the extra mile to find mortgages for people whom many others considered lost causes. The experience he gained, coupled with his love of helping people reach their goals, led him to establish Online Mortgage Advisor, with one clear vision – to help as many customers as possible get the right advice, regardless of need or background.

Pete’s presence in the industry as the ‘go-to’ for specialist finance continues to grow, and he is regularly cited in and writes for both local and national press, as well as trade publications, with a regular column in Mortgage Introducer and being the exclusive mortgage expert for LOVEMoney. Pete also writes for OMA of course!

Read more about Pete

Pete Mugleston

Mortgage Advisor, MD

FCA disclaimer

*Based on our research, the content contained in this article is accurate as of the most recent time of writing. Lender criteria and policies change regularly so speak to one of the advisors we work with to confirm the most accurate up to date information. The information on the site is not tailored advice to each individual reader, and as such does not constitute financial advice. All advisors working with us are fully qualified to provide mortgage advice and work only for firms who are authorised and regulated by the Financial Conduct Authority. They will offer any advice specific to you and your needs.

Some types of buy to let mortgages are not regulated by the FCA. Think carefully before securing other debts against your home. As a mortgage is secured against your home, it may be repossessed if you do not keep up with repayments on your mortgage. Equity released from your home will also be secured against it.

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