Determining the Duties & GST Payable
Where the goods are dutiable, ad valorem or specific duty rates may be applied. The taxable GST value for dutiable goods is calculated based on the CIF value, or the value of the last selling price (LSP), if there has been more than one sale, plus all duties and other charges.
In the case of non-dutiable goods, the GST should be based on the CIF value plus any commission and other incidental charges whether or not shown on the invoice, or the value of the LSP. The CIF value if shown in foreign currency should be converted to Singapore dollars by using the prevailing Customs exchange rate.