FAQ
Can I Sell My Flat in Negative Equity?
Yes, but not on your own. The mortgage has to be paid off on completion, so if the sale price will not cover it your lender must agree to the shortfall before contracts can be exchanged. The debt left over is still yours. This page explains how to check whether you are in negative equity, what the lender will ask for, the alternatives to selling, a worked example on a flat bought at the 2022 peak and what happens to the shortfall afterwards.
The Short Answer
Negative equity means your flat is worth less than the mortgage secured on it. It does not stop you living there, and as long as you keep up the payments the lender has no interest in whether the value has fallen. The problem only arises when you need to move, remortgage or sell, because at that point the mortgage has to be paid off and the sale money will not do it. Flats are more exposed than houses: prices for flats have fallen faster, a shortening lease pulls the value down on its own, and many flats were bought at the 2021 to 2022 peak with small deposits.
This page covers leasehold flats in England and Wales with an ordinary residential mortgage. It walks through how to check the position, what the lender needs, the alternatives to selling, a worked example and what happens to the debt once the flat has gone. The mortgage arrears guide covers the related case where payments have already been missed. This is general information, not financial or legal advice; your lender's terms and your own circumstances decide the detail.
How to Check Whether You Are in Negative Equity
Two figures settle it. The first is the redemption figure: the amount it would take to pay the mortgage off today, including any early repayment charge. Your lender will give you this on request, usually within a few days, and asking for it does not commit you to anything. The second is a realistic sale price, which is not the price you paid, the price a portal estimates or the figure an agent quotes to win your instruction. It is what similar flats in your block or street have actually sold for in the last six months, which you can check free on HM Land Registry's price search.
Then take the selling costs off the price. An estate agency sale costs around 2 to 3 percent of the sale price once the agent's fee, the solicitor and the management pack are counted. If the price less those costs is lower than the redemption figure, you are in negative equity for the purposes of a sale, even if the headline value is a little above the loan. Our guide to the cost of selling a leasehold flat itemises the figures.
Why flats are more exposed than houses
Three things push flats into negative equity more often. Prices for flats have fallen faster than for houses: in London, HM Land Registry's July 2026 index showed the average flat down 6.6 percent in a year against 3.3 percent for property overall. New-build flats carry a premium when first sold that the second buyer does not pay, so an owner who bought new in 2020 to 2022 can be below the loan with no fall in the wider market at all. And a lease loses value as it shortens, with a sharp drop once it passes below 80 years, so a flat bought with 85 years left can lose value through nothing but the passage of time. Our guide to checking how many years are left on your lease explains how to find the figure.
Why the Mortgage Has to Be Cleared on Completion
A mortgage is a charge registered against your flat at HM Land Registry. A buyer will not pay for a flat with someone else's charge still on it, and no lender will lend on one. So on completion your solicitor gives the buyer's solicitor a formal promise, called an undertaking, to repay your lender from the sale money and get the charge removed. The solicitor cannot give that undertaking unless the money will cover the redemption figure, or the lender has confirmed in writing that it will release the charge for less.
This is why negative equity blocks a sale at the exchange stage rather than at the marketing stage. You can put the flat on the market, hold viewings and agree a price without the lender knowing. You cannot exchange contracts until the shortfall is either covered or agreed, and a buyer whose solicitor discovers the problem late will often walk away rather than wait. Raise it with your solicitor and your lender before you accept an offer, not after.
Your Options When the Sale Will Not Cover the Mortgage
There are five routes, and for an owner who is up to date with payments and not forced to move, a sale at a loss is rarely the cheapest of them. Take them in turn.
- Pay the gap yourself. If savings or family help can cover the difference, you sell normally: your solicitor collects the extra from you before completion and redeems the mortgage in full. No lender consent is needed and nothing goes on your credit file.
- Stay and overpay. A repayment mortgage clears capital every month. Most fixed-rate deals allow overpayments of up to 10 percent of the balance a year without a charge, and there is no limit once the deal ends. If you do not have to move, time and overpayments will usually close a modest gap faster than a sale at a loss would.
- Port the mortgage to a new home. Porting means taking your existing mortgage deal with you. A handful of lenders will port a mortgage that is in negative equity, adding the shortfall to the new loan, but it is a full new application with affordability checks and you need a deposit for the new property on top. Most lenders will not do it at all. Ask yours before you plan around it.
- Let the flat and rent elsewhere. This keeps the mortgage running while prices recover and the capital reduces. It needs the lender's consent to let, which usually means a higher rate, and the lease must allow subletting; a tenant in place also changes who will buy later. Our guide to subletting clauses covers the lease side.
- Sell with the lender's agreement. The shortfall sale described below. This is the route for an owner who has to move, cannot keep up the payments or has a flat whose value is still falling, such as one with a short lease.
What is not on the list is handing the keys back. Voluntary surrender leaves the lender to sell the flat, typically for less than you would get, with its legal and sale costs added to your debt. You remain liable for the whole shortfall, and the credit file entry is far heavier than an agreed sale. The mortgage arrears guide explains why a planned sale almost always beats it.
How a Shortfall Sale Works
A shortfall sale, sometimes called a short sale, is a sale the lender agrees to even though the proceeds will not repay the loan in full. Lenders do agree to them, because an agreed sale at a sensible price costs them less than a repossession would. What they will not do is agree blind. Expect the lender to ask for the following before it confirms consent in writing.
- Evidence of the flat's value and of the marketing: the agent's valuation, how long the flat has been on the market, the offers received and why the one you want to accept is the best available.
- An income and expenditure statement, so it can see what you can afford to repay afterwards and whether the sale is the right answer at all. A lender with a duty to treat you fairly may suggest forbearance instead if the figures show you could stay.
- A proposal for the shortfall: a lump sum, monthly instalments over an agreed period or, where you can show you could never repay it in full, sometimes a reduced settlement.
Some lenders run a formal assisted voluntary sale scheme for borrowers in difficulty, under which they may contribute to the agent's and solicitor's fees in return for control over the asking price. Read the terms before you sign one: the shortfall is still owed unless the lender says in writing that it is not, and the lender can usually end the arrangement if you reject the price it wants.
Lenders take weeks rather than days over the decision, and a month or more is common, so start as soon as you decide to sell rather than when a buyer is found. Put everything in writing and keep copies. If you want independent help with the proposal, StepChange, National Debtline and Citizens Advice all give free advice on mortgage shortfalls.
Worked Example: A Flat Bought at the 2022 Peak
Take a one-bedroom new-build flat bought in 2022 for £300,000 with a 10 percent deposit and a £270,000 repayment mortgage over 30 years. Four years of payments have brought the balance down to about £251,000. Similar flats in the block have been selling for £255,000, so on paper the owner is £4,000 in positive equity. The selling costs change that.
Shortfall on a flat worth £255,000 with a £251,000 mortgage
Agent at 1.5 percent plus VAT; solicitor, leasehold supplement and management pack at a combined £2,200.
| Item | Estate agency sale | Cash buying company at 80 percent |
|---|---|---|
| Sale price | £255,000 | £204,000 |
| Agent commission | £4,590 | £0 |
| Solicitor, leasehold supplement and management pack | £2,200 | £2,200 |
| Net proceeds | £248,210 | £201,800 |
| Mortgage to redeem | £251,000 | £251,000 |
| Shortfall you still owe | £2,790 | £49,200 |
Two lessons sit in that table. The first is that a flat can be in positive equity on paper and still need the lender's consent once the costs are counted, so run the sums with the costs in before assuming you are clear. The second is that a cash buying company's discount comes straight off your equity, and in negative equity that means straight onto your debt. If the owner in this example is still inside a fixed-rate deal, an early repayment charge of 1 percent, about £2,500, goes on both columns as well.
For this owner, if nothing forces a move, staying put is the obvious answer: the shortfall only exists because of the selling costs, and the ordinary monthly payments clear a gap of that size within months. If they have to move for work, the agency sale with a small agreed shortfall is the next best. The cash route only makes sense if the agency sale has already failed, the lease is short enough that the value is still falling or the lender has given a deadline.
What Happens to the Shortfall After the Sale
Once the flat is sold, the shortfall is an ordinary unsecured debt to the lender, much like a personal loan, except that it is no longer secured on anything. The terms you agreed before completion govern it: the monthly amount, the period and any interest. Lenders often accept instalments over several years, and sometimes a reduced lump sum in full settlement, especially where the alternative is that you cannot pay at all. Get the agreement in writing before you complete, because afterwards you have nothing left to negotiate with.
If no agreement was reached and the lender comes after the debt later, two time limits apply. The Limitation Act 1980 gives a lender twelve years to sue for the capital part of a mortgage shortfall and six years for the interest, running from the date you defaulted. Separately, the FCA's mortgage rules require a lender that has taken possession and sold to tell you the shortfall figure promptly and to notify you within six years of the sale if it intends to recover it; the FCA's guidance adds that a lender is not obliged to recover a shortfall at all. Any payment or written acknowledgement restarts the limitation clock, so take advice before responding to a demand on an old debt.
How the sale shows on your credit file depends on the state of the account and on the lender's policy. An agreed shortfall sale on an account that is up to date is usually recorded far more lightly than missed payments, a default or a repossession, which stay on the file for six years, but lenders differ and some record the balance as a partially settled account. Ask the lender how it will report the sale before you agree, and get the answer in writing.
If You Are Also in Arrears
Negative equity and arrears often arrive together, since the same rise in interest rates that squeezed the payments also cut the value. The order of events matters. From a first missed payment to an eviction typically takes 8 to 18 months, and the first three or four of those are when you have the most choices: forbearance, a term extension, a switch to interest-only or a planned sale on your own terms. Most lenders have signed the government's Mortgage Charter, under which a borrower will not be forced out within twelve months of a first missed payment except in exceptional circumstances, which is comfortably long enough for a sale on any route.
A shortfall sale agreed with the lender while you are in arrears is still far better than a repossession. The lender's sale is usually at a lower price, its costs are added to your debt, and the repossession stays on your credit file for six years. Our guide to selling a flat with mortgage arrears sets out the timeline, the forbearance options and the routes that finish in time.
Selling to a Cash Buying Company in Negative Equity
We will be straightforward about this. A cash buying company pays 15 to 30 percent below market value, and in negative equity every pound of that discount is a pound added to the debt you keep. The worked example above shows the scale: a shortfall of under £3,000 through an agent becomes nearly £50,000 through a company. For an owner who is up to date with payments, with a lease over 80 years and no deadline, we are the wrong route, and we would rather say so than take the instruction.
Where we do help is when the agency route has failed or cannot work in the time available. A short lease, a block with a building safety problem or a flat that has sat unsold for months while the arrears grow are situations where the market value through an agent is already a cash buyer's price and still falling. In those cases the lender will usually have been told the position, and we can give it the one thing it needs to approve the sale: a firm offer, a fixed completion date and no chain. We have completed shortfall sales where the lender's consent was the final document to arrive, and we are used to working to its timetable. Our cash buyer Top 10 and the below-market-value FAQ explain how our offers are worked out.
Related Reading
For missed payments and the repossession timeline, see the mortgage arrears guide. For the full list of selling costs, see the cost guide. For how a lease length affects value, see the lease length guide.
Further FAQs
Lenders rarely refuse outright, but they will not agree until they have seen the figures. What a lender is deciding is whether to release its charge for less than it is owed, and it will say yes where the price is realistic, the flat has been properly marketed and the alternative is worse for it. It will say no, or ask you to wait, where it thinks the price is too low, where a better offer is likely or where the figures show you could afford to stay. The answer is quicker and more often yes if you go to the lender with evidence rather than a request: the agent's valuation, the marketing history, the offer and a proposal for repaying the gap.
Only on the same terms as any other sale: the lender has to be repaid in full or agree to the shortfall. A sale to a relative at a low price does not reduce what you owe, and a lender will look harder at a below-value sale to a connected person, since it may suspect the price has been set to suit the family rather than the market. If the relative is buying with a mortgage, their lender will also want an independent valuation. Where the aim is to keep the flat in the family while the value recovers, adding the relative to the mortgage and the title with the lender's agreement, or a family loan to clear the gap, is usually simpler than a sale.
Not on its own. Negative equity is a gap between a value and a loan, and nobody reports it. What reaches your credit file is how you deal with the mortgage: payments made on time, payments missed, arrangements agreed and any default or repossession. A shortfall sale agreed with the lender while the account is up to date, with a repayment plan for the balance, leaves a far lighter mark than arrears or a repossession, which stay on the file for six years. Ask the lender how it intends to report the sale before you agree to it.
You can, but it is almost always the worst option. Handing back the keys, called voluntary surrender, does not end the mortgage. The lender sells the flat, usually for less than you would have achieved, adds its legal and selling costs to the account and pursues you for the whole shortfall. The repossession is recorded on your credit file for six years and makes renting and borrowing harder throughout. A sale you control, even one with an agreed shortfall, leaves you owing less and with a cleaner record. Our guide to selling with mortgage arrears compares the two.
Every lender with a charge on the title has to be repaid or has to agree to release its charge, and they are paid in order of priority. The first mortgage lender is paid first; a second-charge lender only gets what is left, which in negative equity is nothing. So a second-charge lender will have to agree to release its charge for no payment or for a small sum, before the sale can complete, and it will expect a repayment arrangement for the balance just as the first lender does. Start that conversation early, since the second lender has the least to gain from cooperating and is often the slower of the two.
If you do not have to move and can keep up the payments, waiting is usually the better financial answer, because every monthly payment on a repayment mortgage reduces the gap whether or not prices move. Two things change that. A lease that is approaching or below 80 years loses value as it shortens, so waiting can widen the gap rather than close it unless you extend; our guide to extending before selling covers the sums. And a block with unresolved building safety or cladding issues may not recover with the wider market at all. In those cases a sale now with an agreed shortfall can be cheaper than a sale later with a bigger one.
Weeks rather than days, and a month or more is common from a complete application to written consent, longer if the lender asks for a second valuation or rejects the first proposal. The application is complete when the lender has the valuation evidence, the marketing history, the offer, your income and expenditure statement and a repayment proposal. Most delay comes from sending those in piecemeal. Tell the buyer's solicitor at the outset that the sale is subject to the lender's consent, so the timetable is set with that in mind and the buyer is not surprised at exchange.
Yes, within limits. Under the Limitation Act 1980 a lender has twelve years to take court action for the capital part of a mortgage shortfall and six years for the interest, counted from the date you defaulted, and the clock restarts if you make a payment or acknowledge the debt in writing. Where the lender repossessed and sold the flat itself, the FCA's rules also require it to notify you within six years of the sale if it intends to recover the shortfall. If you agreed a repayment plan in writing before completion, that plan governs instead, and as long as you keep to it the lender cannot later demand more than it agreed. Get advice from a free debt charity before responding to a demand on an old shortfall.