The World Bank Pakistan Economic Policy team’s ongoing engagement on fiscal policy supports the Government of Pakistan in strengthening revenue mobilization; improving the quality of tax policy; and enhancing the institutional architecture that underpins evidence based fiscal management. As part of this engagement; the World Bank will provide targeted technical assistance to the newly established Tax Policy Office (TPO) within the Ministry of Finance. The creation of the Tax Policy Office represents an important step in separating tax policy from tax administration and in placing policy formulation; analysis; and coordination on a stronger institutional footing.A central element of the World Bank’s support will focus on strengthening the analytical and data foundations of the TPO through targeted technical assistance. The aim is to build institutional capacity within the TPO to undertake timely and rigorous assessments of tax policy options as well as in the preparation of a medium- and long-term revenue strategies. Over time; the TPO is expected to become largely self-sustaining in technical analysis; reflecting the World Bank’s broader goal of fostering strong; independent public institutions in partner countries.The technical support primarily consists of capacity building for TPO staff through the dissemination of best practices on tax policy design and formulation. This involves helping the TPO staff:* Identify policy objectives: e.g.; raising revenue; promoting equity; or encouraging certain behaviors.* Design the tax base: determining what is taxed (income; consumption; property; etc.).* Set the rate structure: deciding how much to tax and whether rates are flat; progressive; or tiered.* Assessing administrative feasibility: ensuring the tax can be implemented efficiently.To implement this; technical assistance will also include the maintenance; and where needed; the building of tax models in close partnership with the TPO to maximize knowledge transfer. Tax models will cover all the major taxes and includes tax micro simulation models; revenue forecasting models; tax-gap models; tax expenditure models and other analytical tools that are essential for evaluating the distributional; fiscal; and economic impacts of tax reforms. To deliver this support effectively; the World Bank intends to contract a qualified firm that can provide just-in-time technical assistance to the Tax Policy Office. The firm will work closely with the World Bank team and the Government with designing the capacity building as well as establishing the modeling infrastructure; strengthen the underlying data and institutional arrangements; and build a sustainable foundation for self-sustaining analytical capacity within the TPO within the broader Ministry of Finance of Pakistan. The selected firm must be capable of responding promptly to ad-hoc requests and adapting effectively to rapidly changing circumstances on the ground.