In accounting and finance, equity is the residual claim or interest of the most junior class of investors in assets, after all liabilities are paid. If valuations placed on assets do not exceed liabilities, negative equity exists. In an accounting context, Shareholders' equity (or stockholders' equity, shareholders' funds, shareholders' capital or similar terms) represents the remaining interest in assets of a company, spread among individual shareholders of common or preferred stock.

At the start of a business, owners put some funding into the business to finance assets. This creates liability on the business in the shape of capital as business is a separate entity from its owners. Businesses can be considered to be, for accounting purposes, sums of liabilities and assets; this is the accounting equation. After liabilities have been accounted for, the positive remainder is deemed the owner's interest in the business.

This definition is helpful to understand the liquidation process in case of bankruptcy. At first, all the secured creditors are paid against proceeds from assets. Afterward, a series of creditors, ranked in priority sequence, have the next claim/right on the residual proceeds. Ownership equity is the last or residual claim against assets, paid only after all other creditors are paid. In such cases where even creditors could not get enough money to pay their bills, and nothing is left over to reimburse owners' equity. Thus owners' equity is reduced to zero. Ownership equity is also known as risk capital, liable capital and equity.