The paper reviews recent developments in trade relations between Vietnam and members of the Regional Comprehensive Economic Partnership (RCEP) agreement, and analyses the impacts on Vietnam's exports of tariff reductions in RCEP trading partners. The margin of tariff preferences is adopted as a proxy for the degree of trade liberalisation and a gravity model is used to assess the impacts of the tariff preferences under the AFTA and ASEAN+1 FTAs on Vietnam's major exports. The results show that the effects of tariff preferences differ between the types of preferences and products. The FTA tariff preferences do not exert a stimulating effect on the export of agricultural products but they have positive effects on several manufacturing exports such as garments and footwear.