A cost plus contract is that type of contract that sees a client paying the contractor the total costs of the project including the additional fee the client may add as a lump sum or as a percentage. It enables flexibility of application particularly in projects where one is not precise on the costs. This contract is advantageous not only to the contractor as he is fully reimbursed but to the client who is made transparent on the costs. But it needs meticulous account following of assets to prevent wrangles. It is perfect in changing or complex projects.