The United Nations Development Assistance Plan (UNDAP) is the business plan of 20 UN agencies, funds and programmes in Tanzania for the period July 2011 to June 2015. This 'One Plan' for Tanzania supports the achievement of the international development goals, the Millennium Declaration and related Millennium Development Goals (MDGs), national development priorities which are consistent with the MDGs, and the realisation of international human rights in the country, including the right to humanitarian assistance for refugees.

The UNDAP replaces the current joint UN programmes and the multiple UN-supported initiatives in the United Nations Development Assistance Framework (UNDAF) with a single, coherent business plan for all UN funds, programmes and agencies in Tanzania, in which each is responsible for delivery on a set of key actions that jointly contribute to shared results.