Financial Glossary
Form 1120
Form 1120 is the U.S. Corporation Income Tax Return filed annually by domestic C corporations to report taxable income, deductions, credits, and the resulting tax liability to the IRS. C corporations are taxed as separate legal entities at the corporate tax rate on net income; shareholders are then taxed again on dividends received, creating the double-taxation structure that distinguishes C corps from pass-through entities. Form 1120 includes schedules for balance sheet data (Schedule L), reconciliation of book income to taxable income (Schedule M-1 or M-3 for large corporations), and analysis of unappropriated retained earnings (Schedule M-2). It is due on the 15th day of the fourth month after the corporation's fiscal year ends, with an extension available.
Problem & Application
A venture-backed SaaS company structured as a C corporation (the preferred structure for institutional investors) files Form 1120 annually. In a year where book net loss is $2M but tax depreciation on purchased software differs from book amortization, the Schedule M-1 reconciles the two figures: book loss of $2M, add back $300,000 in non-deductible meals and entertainment, subtract $150,000 in accelerated tax depreciation in excess of book depreciation, yielding a taxable loss of $1.85M. This net operating loss (NOL) is carried forward to offset future taxable income. Filing accurately matters because the IRS cross-references Form 1120 data against 1099s issued, payroll filings, and prior-year returns. Common errors include failure to attach required schedules for subsidiary entities, incorrect intercompany eliminations for multi-entity structures, and misclassification of officer compensation. A CPA or tax advisor engaged through Parikh Financial would manage the preparation, but the controller must provide accurate book-to-tax workpapers to enable accurate filing.
In Short
Form 1120 is essential for corporate tax compliance, and businesses must ensure accurate and timely filing to minimize liabilities and stay compliant.