Biodiversity offsetting, the last step in the mitigation hierarchy and part of the European Union's No Net Loss policy, has been identified as an important conservation tool. The effectiveness of offsetting for biodiversity conservation is highly variable and currently unquantified for wild pollinators, which are at risk in the EU due to land use change. Halting their decline requires at the very least no further loss of habitat, which biodiversity offsetting has the as-yet-unknown possibility to provide. This study compared semi-natural grassland offsets and paired positive reference grasslands located across the Netherlands using transect walks, flower counts and vegetation surveys. We assessed wild bee and hoverfly abundances, species richness and community composition, and examined the species richness and community composition of floral resources and vegetation. Additionally, we examined whether offset age, management, prior land use and area influenced offset effectiveness. Results showed significantly higher wild bee abundance and species richness in offset grasslands, while hoverflies exhibited no clear pattern. Wild bee and hoverfly community compositions were similar between site types. We found no differences in floral resources or vegetation species richness between offset and positive reference grasslands but did find differences in flower and vegetation community compositions. There were no moderating effects of site characteristics on the effectiveness of biodiversity offsetting, though prior land use did have a significant effect on wild bees, with abundances being higher in sites previously used as grassland. Policy implications. We show that even small differences in the composition of floral resources can result in significantly higher wild pollinator abundances and species richness in offset grasslands. Since our reference grasslands represent the target habitat, our findings suggest that biodiversity offsetting of semi-natural grassland shows promise for achieving No Net Loss, and even Net Gain, of wild bee and hoverfly abundance and species richness in the Netherlands, while maintaining similar species community compositions. Biodiversity offsetting, if properly implemented, can be an effective tool for pollinator conservation.