Selling a House with an Outstanding Mortgage

Most people who sell a property in England and Wales still have a mortgage on it. According to UK Finance, around 80% of UK homeowners have an active mortgage, and the conveyancing system is built to handle this as a matter of routine. Your solicitor manages the entire process of paying off the lender from the sale proceeds, and in most cases it adds no extra complexity to the transaction.

That said, there are scenarios where an outstanding mortgage can create challenges: early repayment charges that eat into your proceeds, negative equity that prevents a clean sale, or a redemption figure that shifts because completion is delayed. This guide explains how the process works from the seller's perspective, what costs to expect, and how to prepare so there are no surprises on completion day.

How selling with a mortgage works

When you sell a property with a mortgage, the basic mechanism is straightforward. Your mortgage lender holds a legal charge over your property, which is registered at HM Land Registry. This charge gives the lender a security interest in the property and must be removed before the buyer can take ownership with a clean title.

Your solicitor arranges this by providing a professional undertaking to the buyer's solicitor. This is a legally binding promise that your existing mortgage will be redeemed from the sale proceeds on completion day. The buyer's solicitor relies on this undertaking when releasing the purchase funds. There is no need for you to pay off the mortgage separately before selling; the entire process happens through the conveyancing system.

The key steps are:

1. Your solicitor requests a redemption statement from your mortgage lender during the conveyancing process.
2. The redemption figure is included in your completion statement, which sets out all deductions from the sale price.
3. On completion day, the buyer's solicitor sends the purchase price to your solicitor.
4. Your solicitor pays the lender the redemption amount via CHAPS bank transfer.
5. The lender releases the charge, and HM Land Registry removes it from the title.
6. You receive the balance after all deductions (mortgage, fees, and costs).

Understanding the mortgage redemption figure

The redemption figure is the total amount your lender requires to close the mortgage account in full. It is not simply the outstanding balance you see on your annual statement or online portal. The figure typically includes several components:

Because interest accrues daily, the redemption figure is only valid for a specific date. If your lender provides a figure valid for 15 March and completion slips to 22 March, the figure will increase by seven additional days of interest. Your solicitor will request an updated redemption statement if the completion date changes, but it is worth being aware that the figure is a moving target.

Most lenders issue redemption statements within five to ten working days of the request. The statement is typically valid for 14 to 30 days. Your solicitor will manage the timing, but you can request your own copy early in the process to understand your net proceeds before accepting an offer.

Early repayment charges: the cost that catches sellers out

If you are still within a fixed-rate, discounted-rate, or tracker deal period, your lender will charge an early repayment charge (ERC) when you redeem the mortgage. This is separate from the mortgage exit fee and can be a significant cost. ERCs typically range from 1% to 5% of the outstanding balance, decreasing each year as you approach the end of the deal.

For example, if you have £220,000 outstanding and are in year two of a five-year fix with a 4% ERC, the charge would be £8,800. That comes directly off your sale proceeds. Our detailed guide to early repayment charges on mortgages covers how to check whether an ERC applies, how the sliding scale works, and strategies to minimise or avoid it.

Once your deal period has ended and you have moved onto the lender's standard variable rate (SVR), there is no ERC to pay. If your deal is due to end within a few months, it may be worth timing your sale so that completion falls after the deal expires. You can use the waiting period to prepare your property and complete your legal paperwork, so you are ready to move quickly once the ERC window closes. Our guide on how to sell your house fast explains how front-loading preparation can shave weeks off the process.

How the redemption appears on your completion statement

Your solicitor prepares a completion statement a few days before completion. This document shows every deduction from the sale price and confirms how much you will receive. The mortgage redemption figure is typically the single largest deduction.

Here is a realistic example of how a completion statement might look for a seller with an outstanding mortgage:

In this example, the seller receives £119,446 from a £325,000 sale. The mortgage-related costs alone (redemption, ERC, and exit fee) account for £199,424. Without the early repayment charge, the seller would receive £123,353 -- a difference of £3,907. For a full breakdown of every cost that comes off the sale price, see our completion day costs guide.

What happens on completion day

For a full walkthrough of what happens on completion day, see our dedicated guide. Your solicitor receives the purchase price from the buyer's solicitor via CHAPS bank transfer. They then distribute the funds according to the completion statement:

1. The mortgage lender is paid first. Your solicitor sends the full redemption amount (including any ERC and exit fee) to your lender. This is the solicitor's top priority because they gave an undertaking to the buyer's solicitor that the charge would be cleared.
2. The estate agent receives their commission. Most agency agreements provide for the solicitor to pay the agent directly from the proceeds.
3. The solicitor deducts their own fees and disbursements.
4. The remaining balance is transferred to you. Your net proceeds are sent to your bank account, usually arriving the same day or the next working day.

Once your lender receives the redemption payment, they confirm discharge and release their charge over the property. Your solicitor then submits the necessary forms to HM Land Registry to remove the charge from the title register. The transfer of ownership process typically takes two to six weeks after completion but does not affect you as the seller -- by that point, you have already received your proceeds and moved on.

Negative equity: when you owe more than the property is worth

Negative equity occurs when the outstanding balance on your mortgage exceeds the current market value of your property. If you bought at a market peak, needed a high loan-to-value mortgage, or property values have fallen in your area, you may find yourself in this position.

According to the FCA's mortgage lending statistics, negative equity remains relatively uncommon across the UK as a whole, but it can be more prevalent in areas where property values have stagnated or declined. If you are in negative equity, selling becomes more complicated because the sale proceeds will not cover the full redemption figure.

Your options if you are in negative equity

• Cover the shortfall from savings. If the gap between the sale price and the redemption figure is manageable, you can pay the difference from your own funds on completion day. Your solicitor will need to arrange this in advance.
• Negotiate a shortfall agreement. Some lenders will agree to release their charge in exchange for a structured repayment plan for the shortfall. This converts the remaining debt into an unsecured loan. The MoneyHelper guide to negative equity explains how these arrangements typically work.
• Wait for the market to recover. If you are not under pressure to sell, staying in the property until values increase may be the simplest solution. You continue making mortgage payments and building equity over time.
• Consider a managed sale with your lender. In cases of genuine financial hardship, your lender may agree to a managed sale where they accept less than the full redemption amount. This is a last resort and will affect your credit rating, so seek advice from a debt charity such as StepChange before pursuing this route.

Regardless of which route you take, you will need your lender's consent to proceed with the sale if you are in negative equity. They hold the charge over the property and will not release it unless they are satisfied that the debt will be repaid in full or an acceptable alternative arrangement is in place.

Multiple mortgages and second charges

Some properties have more than one mortgage or charge registered against them. This can happen if you took out a second charge mortgage, a secured loan, or a Help to Buy equity loan. Each charge must be redeemed on completion day for the buyer to receive a clean title.

Your solicitor will request redemption statements from every lender with a charge on your property. The charges are paid in order of priority: the first charge (your main mortgage) is paid first, followed by any second or subsequent charges. If the sale proceeds are insufficient to cover all charges, you are in a similar position to negative equity and will need to negotiate with each lender.

Help to Buy equity loans are a common second charge on properties purchased since 2013. The amount you owe on a Help to Buy loan is based on a percentage of the property's current market value (not the original purchase price), so the redemption figure can increase if your property has risen in value. You will need a RICS valuation to determine the current market value before the equity loan administrator can provide a redemption figure.

Costs you need to budget for

When selling with a mortgage, the following costs will be deducted from your sale proceeds. Understanding these early helps you calculate your true net position and avoid accepting an offer that leaves you short. For a comprehensive breakdown, see our conveyancing costs breakdown guide.

• Mortgage redemption: The outstanding capital plus accrued interest to the completion date.
• Early repayment charge: 1% to 5% of the balance if you are still within a deal period. See our early repayment charge guide for full details.
• Mortgage exit fee: £50 to £300, charged by every lender regardless of timing.
• Estate agent commission: Typically 1% to 3% of the sale price plus VAT.
• Solicitor fees and disbursements: Usually £1,000 to £2,000 including VAT.
• CHAPS bank transfer fees: £20 to £50 per transfer (one to redeem the mortgage, one to send your proceeds).

Practical steps before you list

If you are planning to sell and still have a mortgage, these steps will help you prepare and avoid unwelcome surprises:

1. Request a redemption statement. Contact your lender as early as possible to get the exact figure. This tells you whether an ERC applies and what the total cost of clearing the mortgage will be.
2. Calculate your net proceeds. Subtract the redemption figure, estate agent fees, solicitor costs, and other expenses from your expected sale price. Make sure the remaining amount is enough for your onward plans, whether that is a deposit on a new property or clearing other debts.
3. Check your deal end date. If your fixed rate ends within a few months, consider whether you can time completion to fall after the ERC window closes. Even a short delay could save thousands of pounds.
4. Ask about porting. If you are buying another property, ask your lender whether you can transfer the existing deal to the new home. This avoids the ERC entirely, subject to the lender's approval.
5. Instruct a solicitor early. Your solicitor will handle the redemption process, but giving them advance notice that you have a mortgage (and whether there are any complications like a second charge or Help to Buy loan) allows them to plan accordingly.
6. Get your property paperwork in order. While you wait for the right time to sell, you can complete your TA6 and TA10 property information forms, order an EPC, and gather title documents. This preparation runs in parallel with your mortgage planning and means you can move quickly once you are ready to list.

Common mistakes sellers make

Selling with a mortgage is routine, but sellers still make avoidable errors that cost time and money:

• Not checking the redemption figure before accepting an offer. If you accept an offer only to discover that the ERC leaves you with far less than expected, you may need to renegotiate or withdraw.
• Forgetting about second charges. If you have a Help to Buy equity loan, a secured personal loan, or a second mortgage, these all need to be redeemed. Request statements from every lender.
• Assuming the online balance is the redemption figure. The balance on your lender's app or annual statement does not include daily interest, the exit fee, or any ERC. The formal redemption statement is always higher.
• Ignoring the daily interest cost of delays. Every day that completion is delayed adds another day of mortgage interest to your redemption figure. On a £200,000 mortgage at 4.5%, that is roughly £24.66 per day.
• Not telling the solicitor about the mortgage early. Your solicitor needs to know about every charge on the property as soon as possible so they can request redemption statements and manage undertakings.

How Pine helps you prepare

Whether you are waiting for your ERC period to end or simply want to get ahead while your property is on the market, Pine helps sellers complete their legal preparation before a buyer is even found. You can fill in your TA6 and TA10 property information forms with AI guidance, order property searches at near-trade prices, and build a solicitor-ready legal pack -- all before conveyancing formally begins. This front-loading means that when your buyer arrives and the mortgage redemption clock starts ticking, you are ready to move fast and minimise those daily interest charges.

Other charges on your property: how they affect the sale

A mortgage is the most common charge registered against a residential property, but it is not the only type. Your title at HM Land Registry may show other charges that also need to be dealt with before the sale can complete. The buyer's solicitor will check the charges register (part of the official title register) as part of standard due diligence, so any charges will be identified during the conveyancing process.

The main types of charges and entries you may encounter include:

• Second charges (second mortgages or secured loans). A second charge sits behind your main mortgage in the order of priority. It must be repaid at completion alongside the first mortgage, and the second charge lender's consent may be needed before the sale can proceed. Your solicitor will request a separate redemption statement from the second charge holder. See our guide on selling with a second charge for more detail.
• Charging orders. A charging order is placed by a creditor who has obtained a County Court Judgment (CCJ) against you and then applied to the court to secure the debt against your property. Like a mortgage, a charging order must be cleared before or at completion. Your solicitor will obtain a redemption figure from the creditor and arrange payment from the sale proceeds.
• Equitable charges. These are informal charges that may not always appear on the title register but can still affect the sale. They can arise from private lending arrangements or family agreements. If an equitable charge exists, the holder may have a claim against the property that needs to be resolved before completion.
• Help to Buy equity loans. The government's Help to Buy equity loan is registered as a second charge on your property. The amount you owe is based on a percentage of the current market value, not the original purchase price, so the figure can be higher than you expect. Our guide on selling with Help to Buy explains the valuation and redemption process in full.
• Restriction entries. Restrictions are not charges in the traditional sense, but they can prevent HM Land Registry from registering a transfer of ownership without specific conditions being met. Common examples include restrictions requiring consent from a co-owner, a lender, or a trustee before the property can be sold. Your solicitor will identify any restrictions and arrange the necessary consents.

All charges must be cleared or formally discharged at completion. Your solicitor will obtain redemption statements from each charge holder, and the total of all charges will appear as deductions on your completion statement. If you have multiple charges, the sale proceeds are distributed in order of priority: the first charge holder is paid first, followed by second and subsequent charge holders.

It is sensible to check your own title register early in the process so you can identify any unexpected charges before they become a problem during conveyancing. You can download your title register and title plan from the HM Land Registry website for £3 per document. If you find a charge you do not recognise, raise it with your solicitor straight away so they can investigate and resolve it before it delays your sale.

Sources and further reading

• Mortgages -- Information for Consumers (Financial Conduct Authority)
• Mortgage Lending Statistics (Financial Conduct Authority)
• UK Finance -- The Voice of Banking and Finance (UK Finance)
• Negative Equity -- What It Means for You (MoneyHelper)
• Moving Home with a Mortgage (MoneyHelper)
• Mortgages and Home Finance: Conduct of Business Sourcebook (MCOB) (FCA Handbook)

Frequently asked questions