Viet Nam announced its intention to decarbonise its economy and achieve net-zero greenhouse gas (GHG) emissions by 2050 at COP26. The decarbonisation of the power sector, the largest source of Viet Nam’s energy-related emissions, is critical to the attainment of the net zero by 2050 goal. By minimising the financial burden on the offtaker, cost-competitive renewable energy (RE) tariffs can catalyse large-scale capacity addition and drive the sustained decarbonisation of the power sector. Curtailment risk, stemming from mismatches in the pace of transmission and generation capacity addition, is a prominent medium-term challenge facing both domestic and international investors which can become a barrier to low-cost RE capacity addition. The CEEW Centre for Energy Finance (CEEW-CEF) proposes a financial solution, the Viet Nam Grid Integration Guarantee (V-GIG), to mitigate this risk to achieve low-cost calibrated capacity addition, while Viet Nam prepares its grid for large-scale capacity addition.