Reduced GST interest rates offer temporary relief for late return payments for March to May tax periods. Amendment revises the GST interest schedule for March, April and May tax periods by substituting the liability phrasing, changing the table heading to month/quarter and prescribing a staggered interest regime: higher-turnover taxpayers receive a short concessional rate followed by the standard rate; lower-turnover taxpayers and specified return categories receive an initial nil-interest window followed by stepped rates before the standard rate applies. The changes differentiate monthly and quarterly filers and are effective from a specified date in May 2021 as a temporary relief measure.