We assess that full global compliance with the Kigali Amendment to the Montreal Protocol will not provide emission reductions consistent with the 1.5oC target of the Paris Agreement. Following the Montreal Protocol’s start-and-strengthen approach to refrigerant management, fast-tracking hydrofluorocarbon phase-down under the Kigali Amendment would result in additional reductions vital for achieving the Paris climate goals. This would also increase chances of staying below 1.5oC additional warming throughout this century.