Shortfall Interest Charge: A UK Guide to Mortgage Shortfalls After Repossession

A shortfall interest charge can arrive years after you lose your home. Your lender repossesses the house, or you hand back the keys, then sells the property for less than you owe. Months or years later, a letter lands on your mat. It says you still owe money, with interest still adding to it.

This guide explains what a shortfall interest charge is, when lenders charge one, and how they work it out. It also covers how long they can pursue you and what to do if you get one. This guide is general information only, not financial or legal advice. Get free advice from a debt charity first.

What a mortgage shortfall is

A mortgage shortfall happens when the sale of your home does not raise enough money to clear your mortgage. Your lender repossesses the house, or you hand back the keys, and your lender sells the property. If the sale price falls below the amount you still owe, the gap becomes a shortfall debt. You still owe it.

For example, take a simple case. You owe £180,000 on your mortgage, and your lender sells your home for £160,000. The £20,000 gap is the shortfall. In addition, the shortfall can include instalments and interest that built up while your home sat on the market, plus legal and estate agent fees. Until your lender sells the house, you remain liable for those costs.

A shortfall can also follow a voluntary sale below the mortgage balance. In that case, the same rule applies. If the sale does not clear the debt, the leftover amount stays yours to pay.

What a shortfall interest charge is

A shortfall interest charge is interest that your lender adds to the shortfall debt after the sale. Your lender charges it because the shortfall remains a debt you owe. That interest runs until you pay the debt off or your lender writes it off.

The interest does not stop on the day your lender sells your home. It also runs while your home is on the market, until the sale completes. After the sale, your lender may keep charging interest on whatever shortfall remains. The rate comes from your mortgage terms, so it varies from one lender to another. Some lenders charge no interest on a shortfall at all.

Unlike ordinary mortgage interest, this charge applies after you have lost the home, to a debt with no property behind it. Your lender no longer holds your home as security, so the shortfall becomes an unsecured debt.

When lenders charge it

Your lender charges a shortfall interest charge after a sale leaves a gap. Three situations lead to one. First, your lender repossesses your home and sells it for less than the mortgage balance. Second, you hand back the keys and your lender sells the home for less than you owe. Third, your lender agrees to a sale below the mortgage balance.

In fact, your lender does not have to charge interest on a shortfall. Some lenders write off small shortfalls rather than chase them. Others agree a payment plan and stop the interest while you pay. Your mortgage terms decide whether your lender can charge interest, and at what rate.

How lenders work out the charge

Your lender works out a shortfall interest charge as simple interest on the shortfall balance. The lender applies the rate from your mortgage terms and adds interest day by day. Each payment you make cuts the balance, so later interest runs only on what remains.

For example, imagine a shortfall of £20,000 and a rate of 6% a year. The lender would add about £1,200 a year. Your own figures will differ, because your rate and your shortfall will differ. Our guide to how interest builds over time explains the same maths in more detail.

One point matters here. Your lender usually takes the sale money to pay the interest you owe before the capital. So your shortfall usually consists of capital only. The law gives your lender a different time limit for capital than for interest.

How long can a lender pursue it?

The Limitation Act 1980 sets the time limits for England and Wales. For mortgage capital, your lender gets 12 years to take court action, under section 20(1). For mortgage interest, your lender gets 6 years, under section 20(5). A shortfall interest charge falls in the interest part, so the 6-year limit applies to it.

For capital, the clock usually starts after two or three missed payments. Your lender then gains the right to demand full payment. For interest, the clock starts when each interest payment falls due. If you handed back the keys with no arrears, the clock probably started that day.

Next, two things can restart the clock. If you pay any amount toward the debt, the time limit starts again from the beginning. If you write to your lender and admit you owe the debt, it also starts again. Take advice before you write or pay anything on an old shortfall. One letter or one payment can hand your lender a fresh 6 or 12 years.

The six-year notice rule

In addition, two other rules protect you. Under the Financial Conduct Authority’s mortgage rules, your lender must tell you in writing within 6 years of the sale if it intends to recover a shortfall. If it misses that deadline, complain to the Financial Ombudsman Service. UK Finance members also follow a policy: if your lender sold your home more than 6 years ago and has not contacted you about the debt, it will not now demand the shortfall.

Overall, Scotland follows different rules. Capital carries 20 years and interest 5 years, under the Prescription and Limitation (Scotland) Act 1973. If you live in Scotland, get advice on the Scottish rules.

What to do if you get one

First, check the figures. Ask your lender for a full breakdown of what it says you owe. The breakdown should show the exact sale price of the house, the valuations, and how your lender worked out the interest before and after the sale. National Debtline’s mortgage shortfalls guide sets out exactly what to ask for, with sample letters you can use.

Second, check the dates. Work out when you last paid anything or admitted the debt in writing, and when your lender sold the house. If more than 12 years have passed since your last payment, your lender may have lost the right to force payment. That applies to the capital part. If more than 6 years have passed, the same may apply to the interest part. Do not assume the debt has expired — take advice.

Third, check whether your lender contacted you in time. It must tell you in writing within 6 years of the sale if it intends to recover the shortfall. If you received no such letter, you may have grounds to complain. Finally, get free advice before you reply. National Debtline, StepChange, Citizens Advice and MoneyHelper offer free, independent help. They can check your dates and figures and tell you whether the debt is still enforceable. Contact them before you write to your lender, because a careless letter can restart the time limit.

Can you challenge a shortfall interest charge?

Yes, you can challenge it in several ways. Start with the sale price. The Financial Conduct Authority’s rules say your lender must obtain the best price a buyer might reasonably pay. If your lender sold the house far below its market value, marketed it poorly, or refused a sale you arranged at a higher price, dispute the amount it says you owe. You have 6 years from the date of sale to claim against your lender. You need proof, such as valuations from the time.

Next, challenge the figures. Check the interest your lender added before and after the sale, and check every fee. Ask for the breakdown and work through it line by line. If your lender cannot justify a fee or a figure, ask it to remove that item.

Finally, if your lender will not help, complain to the lender first, then to the Financial Ombudsman Service. The Ombudsman can look at how your lender handled the shortfall and order it to put things right. Take advice first, because shortfall cases can turn on old dates and paperwork.

A final word

Overall, a shortfall interest charge feels unfair, because it arrives after you have already lost your home. The law does give you real protection, though. Time limits, the duty to tell you in writing, the best-price rule, and the right to complain all work in your favour — but only if you use them in time. Check the figures and the dates, and get free advice before you pay or admit anything in writing.

General-education note: This article is general information only. It is not financial or legal advice. Time limits, rules, and your mortgage terms affect your position, and they can change. Check National Debtline’s mortgage shortfalls guide and get free advice before you act.

FAQs about shortfall interest charges

What is a shortfall interest charge?

It is interest on a mortgage shortfall. Your lender adds it after selling your home for less than the mortgage balance. The rate comes from your mortgage terms, and some lenders charge no interest at all.

Does interest stop when your lender sells your home?

No. In fact, interest does not automatically stop. Interest runs while your home is on the market. Your lender may keep charging interest on the shortfall after the sale. Check your mortgage terms and ask for a breakdown.

How long can a lender chase me for a shortfall interest charge?

In England and Wales, the Limitation Act 1980 gives your lender 6 years to take court action for the interest part. That is section 20(5). The capital part carries a 12-year limit, under section 20(1). A payment or a written admission can restart either clock, so take advice before you pay or write.

What if I cannot afford to pay it?

First, contact your lender and a free debt advice service such as National Debtline, StepChange, Citizens Advice or MoneyHelper. They can check the debt, negotiate a payment plan, or agree a reduced settlement. They can tell you whether your lender should write it off.

Can I complain about my lender over a shortfall?

Yes. Complain to your lender first, then to the Financial Ombudsman Service. You can complain if your lender never told you in writing within 6 years of the sale, if it sold your home below a fair price, or if it will not give you a breakdown.