Lawmakers often provide targeted tax cuts to groups of individuals or corporations in the form of special tax breaks–including exemptions, deductions, exclusions, credits, deferrals, and preferential tax rates. These tax breaks have long been called “tax expenditures” because they are essentially government spending programs that happen to be administered through the tax code. However, tax expenditures are usually less visible than other types of public spending and are therefore harder for policymakers and the public to evaluate. This policy brief surveys the difficulties created by tax expenditures, and describes options for better integrating them into the normal budget process.