Negative equity occurs when the outstanding balance on your mortgage is greater than the current market value of your property. If you owe 200,000 on a home now worth 180,000, you have negative equity of 20,000. The shortfall is a real financial liability that restricts your options.\n\nHow It Happens — House price falls after purchase (the most common cause during market downturns). Buying at the peak of a local market with a small deposit. Purchasing a new-build at a premium that disappears on resale. Interest-only mortgages where the balance has not reduced. Adding fees and debts to the mortgage balance over time.\n\nThe Practical Impact — You cannot sell without bringing cash to cover the shortfall. You cannot remortgage to a new lender because no lender will advance more than the property is worth. Your current lender may allow a product transfer (switching deals internally), which at least prevents you from defaulting to the expensive SVR. You can continue paying your mortgage as normal because negative equity only becomes a real problem when you need to move or remortgage.\n\nIf You Need to Move — Negotiate with the seller of your current home to accept less than market value (unlikely to succeed). Use savings to cover the shortfall at sale. Ask your lender about a negative equity mortgage, where they transfer the shortfall to a new property. Only a handful of lenders offer this — Nationwide has historically been the most accommodating for existing customers in genuine need.\n\nProduct Transfers — If you are approaching the end of a fixed rate, your existing lender should offer you a product transfer to another deal without requiring a new valuation. This is the most important action to take because it prevents you from falling onto the expensive SVR. Product transfers are available regardless of your current LTV position because the lender is not advancing new money.\n\nNegative Equity Mortgages — Some lenders will carry negative equity across to a new property purchase for existing customers. You effectively take a larger mortgage on the new property to cover the shortfall from the old one. Criteria are strict, and it is only available where the borrower is moving for genuine reasons like work relocation or relationship breakdown. Speak to your existing lender first.\n\nTime as the Solution — In most cases, the best strategy is patience. Continue making mortgage payments, which reduce the balance over time. Property values in the UK have historically recovered from downturns within 5 to 10 years. A combination of falling balance and rising values will eventually eliminate the negative equity. Overpaying your mortgage, even modestly, accelerates this process.\n\nWhat Not to Do — Do not stop paying your mortgage because the property is in negative equity. The lender can still pursue you for the full debt. Do not ignore the situation and hope it resolves itself. Do not take additional unsecured borrowing to try to cover the shortfall. Do not panic sell at a loss unless you genuinely have no other option.