The World Bank Enterprise Survey (ES) 2026 in Tanzania is a survey of private sector establishments and measures the characteristics of firms and their experiences in the business environment.The firm-level survey will consist of the global ES module (www.enterprisesurveys.org); with specific questions for measuring the business enabling environment. The expected sample size is 600 completed interviews; across the country. The World Bank Group invites eligible firms to express their interest in providing these services. Interested firms must supply information demonstrating their qualifications to perform the services; including descriptions of similar assignments; experience in comparable conditions; and the availability of appropriate skills among staff. Attachments are not permitted. Firms may associate to enhance their qualifications unless otherwise stated in the solicitation documents. When firms form a group to submit an EOI; they must specify the lead firm. If shortlisted; the lead firm identified in the EOI will be invited to participate in the request for proposal (RFP) phase.IMPORTANT: Please use the designated fields for the expression of interest. EOIs should be approximately 1 to 3 pages in length. The World Bank will not open or consider any attachments. All information must be provided in the main body of the EOI on the platform.