Sell your current home
Understand your outstanding mortgage, likely sale value and usable equity.
- Calculate your equity
- Review your current deal
Moving Home Mortgage
Porting, Equity, Chains and the Real Cost of Moving
If you are planning to move home, the mortgage side of the move can feel more complicated than the property search itself. You are not simply asking whether you can afford a new house.
You are also working out what happens to your current deal, whether you can keep your existing rate, how much equity you can release, and how much the whole move will cost once legal fees, removals, and stamp duty are added in.
This home mover mortgage guide is designed for homeowners who already have a mortgage and want to understand the smartest way to move.
In many cases, the best option is not just “take a new mortgage” or “keep the old one”.
Review your current deal
Check your rate, term and any exit charges.
Understand your equity
Work out what may be available for your next deposit.
Prepare for the chain
Plan the sale and purchase as one connected journey.
Your Moving Plan
Two connected transactions
Buy your next home
Check affordability, borrowing options and the total cost of your next purchase.
- Plan your new borrowing
- Budget for moving costs
It is a decision about timing, affordability, product features, and total cost. A well-planned move can save money and reduce stress. A rushed one can do the opposite.
The key thing to remember is that selling and buying property at the same time creates extra moving parts.
Your current home may be the deposit for your next one.
Your current mortgage may be portable, but not automatically.
And the chain you are part of can affect how smoothly everything completes.
The first question: can you move without changing your mortgage?
For many homeowners, the most important issue is porting your mortgage. Porting means taking your existing mortgage product, or at least the rate and deal attached to it, and moving it to your new property with the same lender. That sounds simple, but it is not a guaranteed right. Lenders usually reassess your circumstances, including income, spending, credit profile, and the property itself.
That means even if your mortgage is portable, you still need to qualify again. If your circumstances have changed since you first took out the loan, the lender may not approve the same borrowing structure. If the new home is more expensive, the additional borrowing may come at a different rate. If it is cheaper, you may face charges on the part of the loan you are repaying early.
In practice, porting is best thought of as a possibility, not a promise. It can be a very useful option when your existing deal is better than what the market is offering now, especially if you are still in a fixed term and do not want to pay unnecessary exit costs.
Equity Calculator
Work out your usable equity
Sale price
£350,000
Mortgage balance
£200,000
Selling costs
£10,000
Step 01
Property sale price
Step 02
Outstanding mortgage
Step 03
Estimated selling costs
Estimated usable equity
Potential deposit for your next home
How mortgage equity becomes your next deposit
One of the biggest advantages of moving home is that you may already have built up value in your current property. That is your mortgage equity. In simple terms, it is the difference between your home’s market value and what you still owe on the mortgage.
If your house is worth more than the remaining loan balance, the difference can become the deposit for your next purchase. For example, if you sell for £350,000 and still owe £200,000, you may have £150,000 before costs. But that is not the full amount you can automatically spend. You still need to subtract selling costs, legal fees, moving costs, and possibly mortgage charges before you know what you can actually use.
This is why equity is so important in a mortgage for moving home. It influences how much you can put down on the next property, how much you may need to borrow, and whether you are upsizing, downsizing, or simply moving sideways into a similar home.
Not interested in Moving Home mortgage? Find other options that meet your needs.
Explore other residential mortgage options!
First-time Buyer
Buying your first home can feel overwhelming, but the right mortgage makes the process much clearer. We help you understand deposit requirements, affordability checks, and the options available to first-time buyers.
Moving Home
If you are upsizing, downsizing, or relocating, a moving home mortgage can help you transition smoothly to your next property. We guide you through porting, borrowing, and timing considerations.
Remortgage
A remortgage can help you switch to a better deal, adjust your mortgage term, or release equity from your property. We compare suitable options based on your current situation and future plans.
Shared Ownership
Shared Ownership can be a practical route if you want to buy a share of a property and pay rent on the rest. We help you understand how the mortgage works and what lenders look for.
New Build
Buying a new build property can involve different lender criteria and timelines. We support buyers looking for mortgage options that work with new build homes and developer arrangements.
Right to Buy
If you are eligible to purchase your council home through Right to Buy, we can help you understand the mortgage process and the financial steps involved.
No Deposit Mortgage
If you are exploring options with little or no deposit, we can help you understand specialist routes that may be available depending on lender criteria and affordability.
Low Deposit Mortgage
A low deposit mortgage can be a suitable option for buyers who have not yet built a large deposit but are ready to move forward. We help you compare products that may fit your budget and profile.
What happens when you are part of a property chain?
If you are moving home, you are probably part of a property chain. That means your sale depends on someone else’s purchase, and your purchase depends on someone else’s sale. Chains can be short, but they can also become very complex very quickly.
This is where selling and buying property becomes more than just a personal transaction. A chain can delay completion, affect negotiation power, and even cause a deal to collapse if one buyer or seller drops out. If a lender takes longer than expected, a survey throws up a problem, or someone in the chain changes their mind, the whole sequence can be affected.
This is why movers need to plan for flexibility. You may need a temporary rental arrangement, a bridging option in rare cases, or a clear conversation with your estate agent and solicitor about timings. A property chain is not always a disaster, but it does require patience and realistic expectations.
Property Chain
Every move is connected
First-time buyer
No property to sell
Your buyer
Buying your home
Your purchase
Survey issue found
Your seller
Waiting to complete
End of chain
Vacant property
Planning your next move?
Get your mortgage strategy right first.
Understand your options, compare the true costs and build a mortgage plan around your property move.
The real cost of moving home
People often underestimate moving house costs because they focus only on the mortgage payment. In reality, the full bill can be substantial. Based on official guidance, buying or selling a home can involve more than £5,000 in extra costs, not including your deposit or stamp duty where relevant. That can include conveyancing, surveys, mortgage fees, valuation charges, removals, estate agent costs, and legal work.
If you are selling, the estate agent fee alone may be a significant expense. If you are buying, you may also need to pay for mortgage arrangement fees, valuation fees, and searches. If you are moving larger distances or from a bigger property, removal costs may also rise.
- The key point is simple: the sale price of your current home is not the same as the cash you will have available to move. A realistic budget should include every stage of the transaction, not just the mortgage.
Cost checklist
Plan for the full move
Selling costs
Estate agent, solicitor and conveyancing fees
Buying costs
Surveys, searches, valuations and legal work
Mortgage fees
Arrangement, booking and broker charges
Removal fees
Transport, packing, storage and insurance
Tax
Stamp duty or other applicable property tax
Buffer for surprises
Keep funds aside for delays and unexpected work
Stamp duty and why movers still need to check it carefully
Many movers assume stamp duty only matters to first-time buyers, but that is not the case. If you are buying a new home in England or Northern Ireland, stamp duty may still apply depending on the purchase price and your ownership position at completion. The rules are tiered and can become more expensive if you are buying a second property before selling the first, even if only temporarily.
The important detail for movers is whether the new home is replacing your main residence and whether your previous home is sold within the required timeframe. If the old property remains unsold on completion, you may need to pay the higher rate first and then reclaim the extra later if you qualify. That is one more reason to plan your cash flow carefully.
- For movers, stamp duty is not just a tax issue. It is a timing issue. It affects how much cash you need on completion day, and that can shape the entire move.
Moving timeline
How the timing can affect your tax
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01Previous propertyPreferred order
Sell your old home
Ideally, the sale completes before or at the same time as your new purchase.
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02New propertyCheck ownership
Buy your new home
Your ownership position is assessed when the new property purchase completes.
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03Critical pointMore cash may be due
Completion day
If your old home remains unsold, a higher stamp duty rate may need to be paid upfront.
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04After completionIf eligible
Possible reclaim
You may be able to reclaim the additional amount after selling your former main home, provided you meet the relevant conditions.
The order of these events can change how much money you need available on completion day.
How the mortgage application works when you are moving
A mortgage for moving home usually follows a familiar structure, but with added pressure because the sale and purchase are happening together. First, you need a clear picture of your current mortgage and the likely equity in your home. Next, you should find out whether porting is available and whether it is actually the best option.
Then comes affordability. Lenders do not just look at your current monthly payment. They assess your income, debts, regular spending, and the new loan amount against their current criteria. Even if you have been a homeowner for years, you still need to pass the checks.
Once you are approved, your solicitor can coordinate the legal side of the sale and purchase. Completion usually needs to be timed carefully so money from the sale can be used to fund the purchase. If the chain is long, that timing becomes even more important.
This is why movers benefit from starting earlier than they think. A clean mortgage plan gives you much more control when negotiations begin.
Six-step process
Your moving home mortgage journey
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01Current position
Review current deal
Check your balance, interest rate, term and any early repayment charges.
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02Available deposit
Calculate equity
Estimate your sale proceeds after repaying the mortgage and moving costs.
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03Borrowing position
Check affordability
Review your income, debts, regular spending and likely new loan amount.
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04Initial decision
Get an agreement in principle
Understand your potential borrowing range before making serious offers.
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05Property transactions
Sell and buy
Progress your sale, submit the full application and coordinate the purchase.
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06Final stage
Complete
Sale funds are transferred and used towards completing your new purchase.
Moving home versus remortgaging! which is better?
The right choice between moving home and remortgaging depends on the numbers. Sometimes porting your current mortgage is the most cost-effective route because it lets you keep a favourable rate. Sometimes taking a completely new product is better because the new market rate, combined with fees and penalties, works out cheaper overall.
This is where people get trapped by looking only at the headline interest rate. A lower rate is not always the cheapest solution if there are arrangement fees, exit fees, or early repayment charges attached. Likewise, porting can seem convenient, but if the lender’s re-check is strict, or the extra borrowing needs a higher-rate top-up, the total cost may rise.
A good comparison looks at the full picture. That means your current rate, the early repayment charge, any product fee, the rate on extra borrowing, and the long-term monthly cost. The cheapest-looking option on day one is not always the best value over the full term.
Keep your current deal
Port your mortgage
Why it can help
- You may be able to keep a favourable existing interest rate.
- Porting may help you avoid an early repayment charge on your current deal.
- Staying with your existing lender can make the move feel more straightforward.
Consider
- Your lender will reassess your affordability and the new property.
- Extra borrowing may need to be placed on a separate, higher-rate product.
Choose a different deal
Take a new mortgage
Why it can help
- You can compare new products and rates from other mortgage lenders.
- One new product may cover the full loan instead of using a separate top-up.
- A new deal may work out cheaper after the total long-term cost is compared.
Consider
- Early repayment charges or exit fees may apply to your current mortgage.
- Arrangement, valuation and legal fees can reduce the benefit of a lower rate.
Upsizing vs downsizing mortgage strategy
Not every move is the same. The financial plan for an upsizing move is very different from a downsizing one, which is why the phrase upsizing vs downsizing mortgage is useful for planning.
If you are upsizing, you may need to borrow more. That usually means stronger affordability checks, especially if your income has not increased at the same pace as the property market. Your equity may still help, but the new loan could be materially larger than the one you have now.
If you are downsizing, the move can release cash. That might mean reducing your mortgage, clearing it entirely, or unlocking money for retirement, family help, or future savings. Downsizing can be financially helpful, but it still comes with moving costs and possibly stamp duty, so it is not always as simple as “sell bigger, buy smaller, keep the difference.”
In both cases, the real answer is not just whether you can move. It is whether the move improves your long-term financial position.
Moving to a larger home
Upsizing
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You may need to borrow more
A higher purchase price could make your new mortgage materially larger than your current loan.
-
Affordability checks may be stronger
Lenders will assess whether your income can comfortably support the higher loan and monthly repayments.
-
Your existing equity can help
Equity from your current property may provide a larger deposit and reduce the additional amount you need to borrow.
Moving to a smaller home
Downsizing
-
You may be able to release cash
Selling a larger property and buying a smaller home can unlock some of the equity built up in your current property.
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Your mortgage could be reduced or cleared
Released equity may help lower your mortgage balance, clear it completely or reduce your monthly repayments.
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Moving costs still need to be included
Stamp duty, legal fees, estate agent fees and moving expenses can reduce the final amount of cash released.
Special situations movers should think about
Some home moves are straightforward. Others are more complex. If your credit profile has changed since your last mortgage, if your employment has shifted, or if you are moving into a new build, the process may require more planning.
New-build purchases can be especially tricky because completion dates may change, and that can affect your sale chain or porting timeline. If you are buying and selling across different regions, the legal and tax setup can also vary. If you have taken payment holidays or financial support on your current mortgage, that may also need to be explained during the review.
This is another reason a broker can be useful. A good adviser can help you see the full picture before you make a decision that is hard to reverse later.
01 Credit changes Your financial profile has changed
If your credit profile has changed since your last mortgage, lenders may assess your application differently. Missed payments, additional borrowing or a lower credit score can affect the products and rates available to you.
- Check your credit reports before applying for a mortgage.
- Be ready to explain missed payments, payment holidays or recent financial support.
- Avoid taking on unnecessary new credit shortly before applying.
02 New-build purchase Completion dates can change
New-build purchases can be more complicated because the property may not be ready on the original estimated date. A delayed completion can affect your mortgage offer, property chain and plans to port your existing mortgage.
- Check how long your mortgage offer remains valid and whether an extension may be available.
- Ask the developer how changes to the estimated completion date will be communicated.
- Confirm how a delay could affect the sale of your current home and your mortgage porting timeline.
03 Relocation for work Employment and location can affect the review
Moving for work can involve a new employer, probation period, different income structure or a gap between jobs. Lenders may require additional evidence before using the new income for affordability.
- Keep your employment contract and confirmed start date available.
- Explain any probation period, bonus, commission or variable income clearly.
- Check whether buying in another region changes the legal or tax process.
04 Selling before buying Timing can affect your mortgage and housing plans
Selling before you buy can remove a property chain and confirm how much equity is available. However, you may need temporary accommodation, storage and a clear plan for your current mortgage.
- Ask whether your lender allows a gap between selling and completing a mortgage port.
- Include temporary accommodation, storage and a second move in your budget.
- Check whether early repayment charges apply when your current mortgage is redeemed.
When a broker adds the most value
A broker can be particularly valuable in a moving-home case because the decision is rarely just about the mortgage rate. It is about sequencing, timing, deal structure, and lender appetite. A broker can help you compare porting against remortgaging, explain whether your lender is likely to accept the new property, and identify when a fresh mortgage may be the smarter route.
For many movers, this saves both time and stress. It also reduces the chance of discovering too late that the lender does not like the property, the borrowing amount, or the way the chain is structured.
If your move feels complicated, that is usually a sign that advice matters more, not less.
More complex move
Why use a broker?
A broker can compare the full cost and practical impact of your options, rather than focusing only on the headline mortgage rate.
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Compare porting and remortgaging
Review rates, fees, early repayment charges and any additional borrowing across both routes.
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Check the property with lenders
Find out whether lenders are likely to accept the property type, construction, location and valuation.
-
Coordinate the timing
Plan around your sale, purchase, mortgage offer, completion date and any gap between transactions.
-
Structure additional borrowing
Understand how extra borrowing will be priced and whether a fresh mortgage offers a better solution.
Straightforward move
When direct may be enough
Going directly to your existing lender may be practical when the move is simple and you already understand the available options.
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The property is standard
It has conventional construction, a clear valuation and no obvious issues that may concern a lender.
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Your borrowing needs are unchanged
You do not require significant additional borrowing and the current mortgage remains affordable.
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Your circumstances are stable
Your employment, income and credit profile have not materially changed since your original application.
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The lender has confirmed the process
You understand the porting rules, fees, timescales and conditions attached to the new application.
Final thoughts
Moving home should be exciting, but the financial side deserves real attention. The best outcomes usually come from planning early, understanding your equity, checking whether your current deal can be ported, and budgeting for the true cost of the move. The property market will always have some uncertainty, especially when a chain is involved, but your mortgage plan does not have to be uncertain.
If you are clear on the numbers, realistic about timing, and prepared for the costs around the transaction, moving becomes much more manageable.
That is the purpose of this guide: to help you make a confident decision before the chain, paperwork and deadlines start to apply pressure.
Let's Find the Right Mortgage for You
Amir Shojaee
Director and Founder of PBSBrokers
CeMAP Qualified Mortgage Adviser
At PBSbrokers, we offer a free initial consultation to review your income, deposit, affordability, credit profile, and mortgage objectives. Whether your case is straightforward or more complex, we'll help you understand the options that may be available and guide you through the next steps.
