On 26 January 2018, the Internal Revenue Service (SRI) of Ecuador has published a Resolution No. NAC-DGERCGC18-00000018 to commence the coefficients for presumptive tax assessments for the tax year 2017.

The coefficients for 2017, which vary by industry/activity, are 0.1079 to 0.6380 on total revenue; 0.1085 to 0.8526 on total costs and expenses; and 0.0308 to 0.6520 on total assets. The higher result of the three is applied as the basis for assessment based on the information available to the tax authority.