WASHINGTON—The World Bank and four regional development banks, aiming to crack down on corrupt practices in developing countries, plan to jointly blacklist any company that one of the banks finds guilty of graft or collusion, said officials involved with the deal.

The agreement—to be signed in Luxembourg on Friday by heads of the World Bank, Inter-American Development Bank, European Bank for Reconstruction and Development Bank, Asian Development Bank and African Development Bank—could affect the business practices of tens...