Most estimates of adaptation cost in the literature are for developing countries. Chapagain et al.  assessed various estimates of adaptation for developing countries, under different emissions scenarios for 2030 and 2050. The median estimates  from these studies are 127  and 295  billion USD yr-1 for climate change impacts out to 2030 and 2050, respectively . All but one study report adaptation costs higher than the 70-100 billion estimated in 2010 by the World Bank .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report