For the growth of economy of India, collection of tax duty is the prime source. In 1954, France is the prime nation who enforced Goods and service Tax with four tax rate slabs. Currently, in the whole globe one hundred and sixty countries that have enforced GST Tax. Goods and Service Tax is an individual tax mechanism which minimize the comprehensive impact. The report of World Bank indicates that (GST) Goods and Service Tax major slab in India is 28 percent means in 115 countries and it’s second highest. Goods and Service Tax was enforced in India on 1st July, 2017. Comparison in between Canada and Brazil, in India the model of GST Tax is based on a double tax mechanism. This paper emphasizes the mechanism of Goods and Service Taxes, threshold limit, and GST tax slabs around the world. This study analyzes the mechanism of GST Tax slabs in India to the entire globe. This study is based on the subordinate sources obtain from research journal, articles Government websites, new papers and research papers