The City of Rehoboth Beach announced Saturday that its commissioners approved an increase on the rental tax from 3 to 6 percent. The tax applies to places like bed and breakfasts, condos, cabins and rentals through the Airbnb website. The new rate will apply to any rental contracts after January 1. Commissioners did not want to change the rate on contracts that have already been signed. The town plans to use the money for infrastructure improvements including storm drains.