Revitalization Zone The Economic Revitalization Zone tax credit offers a short term business tax credit for projects that improve infrastructure and create jobs in designated areas of a municipality. As of December 2017, there are 209 ER zones located in 67 municipalities. Here is the latest list of ER zones in New Hampshire. ERZ FAQs for businesses. ERZ application for businesses. ERZ FAQs for municipalities. ERZ Town/Municipality Designation form.