What is equity?

Equity is the part of your home you actually own — its current market value minus what’s still owed on the mortgage. If your home is worth more than the loan against it, that difference is yours outright, whether you take it out by selling, remortgaging, or simply hold it as wealth on paper.

How it grows

Equity builds from two directions at once. Every mortgage repayment includes a slice that reduces the loan balance, so the debt side shrinks a little each month. Separately, if the home’s market value rises, that gain adds straight to your equity without you doing anything. Both movements can happen together, which is why equity often grows faster than the repayment schedule alone would suggest.

Overpayments speed up the first half of this. Paying extra off the mortgage — beyond the scheduled repayment — cuts the outstanding balance faster than the loan term assumes, so the debt side of the equation shrinks more quickly and equity builds sooner. This matters most for anyone tracking their loan-to-value, since a lower LTV can open up better rates when switching lender.

Negative equity

Negative equity is the reverse position: the home is worth less than the loan still owed against it, because the property’s value fell faster than the debt was paid down. It rarely affects everyday life — repayments continue as normal — but it becomes serious at the point of selling or switching lender. A sale can’t fully clear the loan if the proceeds fall short of the balance, and a lender asked to refinance a loan-to-value above the home’s value has little room to offer better terms. It’s a position that resolves itself over time, as repayments reduce the debt and property values move, but it constrains your options for as long as it lasts.