COMMERCIAL LEASES ARE OFTEN the subject of complex, lengthy, and intense negotiations. To be proficient at such negotiations, one must be familiar with certain basic concepts and be able to anticipate and protect clients from issues that may arise during the term of the lease. This article addresses some of the principal legal and financial terms applicable to commercial leases. Examples are included where applicable. All examples provided are for illustrative purposes only, and should be used as a guide and starting point only by practitioners in preparing their own forms in compliance with applicable laws, and with the terms and conditions of each particular transaction.