希望大家一起陪着我腿软，肝儿颤不会发链接呢 GST is the second-largest source of revenue, just behind the corporate income tax SINGAPORE'S GST rates are relatively low compared with its regional peers. One percentage point hike would raise tax revenue of about S$1.6 billion to S$1.8 billion, equivalent to about 0.4 per cent of Singapore's nominal gross domestic product.