Corporate taxation in Pakistan is primarily governed by the Income Tax Ordinance, 2001, which provides the legal framework for taxation of companies, computation of taxable income, tax rates, compliance obligations, and enforcement mechanisms. The Ordinance defines the scope of corporate tax by imposing tax on the taxable income of companies and regulating various aspects of corporate taxation through different provisions. The Federal Board of Revenue (FBR) administers the Income Tax Ordinance, 2001 and periodically updates it through Finance Acts and amendments. 
Under Section 4 of the Income Tax Ordinance, 2001, income tax is charged on the taxable income of a person, including a company, for a tax year. A company’s taxable income is determined according to the rules provided in the Ordinance, which involve identifying total income, allowable deductions, tax adjustments, and applicable tax rates.  The concept of taxable income is further explained under Section 9, while Section 10 deals with total income and Section 11 provides the heads of income under which income is classified. 
A company’s income is generally taxed under the head of “Income from Business” as provided in the corporate taxation framework. The computation of business income involves considering revenues, expenses, depreciation, amortization, and other adjustments allowed under the Ordinance. The provisions relating to deductions and allowances ensure that only the legally recognized profits of a company are subjected to tax.
The taxation of corporate profits also includes specific provisions regarding dividend income. Section 5 of the Income Tax Ordinance, 2001 provides for tax on dividends received by shareholders, establishing a separate mechanism for taxation of dividend distributions.  In addition, Section 5A deals with tax on certain undistributed profits/reserves, which aims to address situations where companies retain profits instead of distributing them. 
Corporate taxpayers are also subject to the minimum tax regime under Section 113 of the Income Tax Ordinance, 2001. This provision applies where a company has low taxable income or no tax payable due to losses, exemptions, credits, or deductions. In such cases, minimum tax may be calculated based on turnover as prescribed under the law.  This ensures that companies contribute a minimum amount of tax despite reporting reduced taxable profits.
The Ordinance also provides rules for tax administration and compliance. Companies are required to maintain proper records, file income tax returns, and comply with notices and assessments issued by the tax authorities. Section 114 relates to filing of income tax returns, while assessment procedures are mainly covered under Section 120 and Section 122, allowing the tax authorities to process and amend assessments where required. Penalties for non-compliance are provided under Section 182 of the Ordinance. 
Another important aspect of corporate taxation is withholding tax compliance. Companies making certain payments, such as payments to contractors, suppliers, employees, or other parties, may be required to deduct and deposit withholding tax under relevant provisions of the Ordinance. These mechanisms help the government collect tax at the source and improve documentation of economic transactions.
The Income Tax Ordinance, 2001 also contains provisions relating to international taxation, including taxation of non-residents and avoidance of double taxation. Sections 101 to 107 deal with international taxation matters, while Sections 108 to 112 contain anti-avoidance provisions designed to prevent arrangements made primarily for reducing tax liability. 
The corporate tax framework under the Income Tax Ordinance, 2001 provides a comprehensive system for taxing companies operating in Pakistan. Through provisions such as Sections 4, 5, 9, 11, 113, 114, 122, and 182, the law establishes rules for tax charging, computation, minimum taxation, compliance, assessments, and penalties. Understanding these provisions is essential for companies to manage their tax obligations effectively and ensure compliance with Pakistan’s taxation system.