In law, liquidation refers to the process by which a company (or part of a company) is brought to an end, and the assets and property of the company redistributed. Liquidation can also be referred to as winding-up or dissolution, although dissolution technically refers to the last stage of liquidation.

Liquidation may either be compulsory (sometimes referred to as a creditors' liquidation) or voluntary (sometimes referred to as a shareholders' liquidation, although some voluntary liquidations are controlled by the creditors, see below).

In finance, liquidation is also sometimes used as convenient shorthand for converting an asset to cash.

Voluntary liquidation occurs when the members of the company resolve to voluntarily wind-up the affairs of the company and dissolve. Voluntary liquidation begins when the company passes the resolution, and the company will generally cease to carry on business at that time (if it has not done so already). If the company is solvent, and the members have made a statutory declaration of solvency, the liquidation will proceed as a members' voluntary winding-up. In such case, the general meeting will appoint the liquidator(s). If not, the liquidation will proceed as a creditor's voluntary winding-up, and a meeting of creditors will be called, to which the directors must report on the company's affairs. Where a voluntary liquidation proceeds by way of creditor's voluntary liquidation, a liquidation committee may be appointed.

Where a voluntary winding-up of a company has begun, a compulsory liquidation order is still possible, but the petitioning contributory would need to satisfy the court that a voluntary liquidation would prejudice the contributories.

In addition, the term liquidation is sometimes used when a company wishes to divest itself of some of its assets. This is used, for instance, when a retail establishment wishes to close stores. They will sell to a company that specializes in store liquidation instead of attempting to run a store closure sale themselves.