A property transaction, completion is the final step in the legal process of transferring ownership of the property to the acquirer. It is usually the point at which the purchase price for the property is paid and the transfer documents are dated. For further information, see Toolkit, Conveyancing procedure on sale of property toolkit: Completion.

A share purchase transaction, completion typically involves the seller delivering (among other documents) an executed stock transfer form for the sale shares, and the buyer paying the purchase price to the seller. For further information, see Practice note, Exchange and completion: acquisitions: What happens at completion?.

A finance transaction, completion usually refers to the point at which the borrower's drawdown of the loan takes place. For further information, see Practice note, Chronology of a loan finance transaction: Completion.