The Customs and Taxation Department is responsible for developing the GSS taxation policy and the necessary Decrees relating to revenue-raising measures. It is also responsible for developing annual estimates of revenue based on the laws, and for this purpose would consult closely with the Revenue Authority.
The functions are divided between the Customs measures and other taxation. The department would also advise on revenue sharing with the Federal Government of Somalia (FSG) and general revenue relationships between the levels of government.