This report entitled "FUNCTIONS PERFORMED AS AN ASSISTANT ACCOUNTANT AT THE COMPANY CONSORTIUM F & F CONTRATISTAS GENERALES SAC" is based on the experience obtained during the years 2012 - 2016, during which time I put into practice the knowledge obtained in my university education according to the curriculum of the Professional School of Accounting and Finance. This Professional Sufficiency Work was developed with the objective of applying Section 23: Revenue from Ordinary Activities of the IFRS for SMEs to construction contracts and determine their effect on the company's results. Determine the amount of accrued income and the treatment of customer advances according to Section 23, as well as the degree of termination, the result of a construction contract and, the treatment for the difference between the income according to the billing and the accrued income By applying the IFRS for S...