1. Recognizing community tenure rights over forest lands is a low-cost way to promote better forest management and reduce deforestation, with costs ranging from $0.05 to $9 per hectare on average. 2. Securing these tenure rights is important for REDD+ programs to work effectively by giving local communities incentives to conserve forests, yet the full costs of REDD+ programs are still unknown. 3. Recognizing tenure rights is a complex political process but methodologies exist, and it is feasible and important to scale up recognition of community rights over the 350 million hectares of forest lands they already own or manage.