“ECI” stands for Estimated Chargeable Income. It is an estimate of a company’s chargeable income for a Year of Assessment (YA).
A company has to furnish Estimated Chargeable Income (ECI) within three months after the financial year end of the company.
If you furnish your company’s ECI within the qualifying period, you can pay your tax by instalments basis. The earlier you furnish your ECI, the higher the number of instalments available.