Reduced interest relief for delayed GST filings establishes nil then lower interest followed by normal rate after notified cutoffs. Clarification explains the staged application of modified interest rates and conditional waiver of late fees for delayed filing of FORM GSTR-3B and FORM GSTR-1: an initial nil interest window immediately after the return due date, a subsequent reduced interest rate until notified cut off dates, and reversion to the normal statutory rate thereafter; distinct schedules and examples are provided for taxpayers above and below the aggregate turnover threshold, and waiver of late fee applies only if returns are filed by the dates specified in notifications.