This chapter examines the Internal Revenue Code’s treatment of religious entities. The federal tax statute embodies three diverse approaches to taxing and exempting sectarian organizations and activities. Some provisions of the Code—the charitable deduction, the general income tax exemption for eleemosynary institutions, the federal unemployment tax—exempt religious entities and other charitable, educational, and philanthropic institutions. Other provisions of the Code narrowly target churches for tax exemption. For example, the Code relieves churches of filing requirements with which nonchurch religious entities and other eleemosynary organizations must comply. Similarly, churches’ retirement plans receive lenient treatment under the Code. Churches receive procedural protections from IRS audits.Yet other provisions of the Code tax churches as for secular entities. Churches generally pay FICA taxes—Social Security and Medicare payroll taxes—on the compensation paid to nonclerical employees. These payroll taxes can be considerable. Churches also pay federal income taxes on their unrelated business incomes.