# Filing Business Taxes in 2026: A Practical Roadmap
Business owners face different tax filing requirements depending on their entity structure. A sole proprietor files differently than an LLC, S-corp, or C-corp, and getting this right avoids penalties and missed deductions.
The first step involves identifying your business structure. Sole proprietorships report business income on Schedule C, attached to your personal Form 1040. LLCs taxed as partnerships file Form 1065. S-corporations file Form 1120-S. C-corporations file Form 1120. Each form triggers different tax rules and deduction opportunities.
Gathering documentation comes next. Collect receipts for business expenses, mileage logs if you claim vehicle deductions, payroll records if you have employees, and quarterly estimated tax payments you made throughout 2025. Organize bank statements showing business income and expenses.
Deductions reduce your taxable income significantly. Home office deductions, supplies, equipment, professional services, rent, utilities, and employee wages all count. The IRS allows deducting ordinary and necessary business expenses. Vehicles used for business qualify for either the standard mileage rate (63 cents per mile for 2026) or actual expense deduction method.
Self-employed individuals must pay self-employment tax on Schedule SE. This covers Social Security and Medicare contributions for people without traditional employers. The combined rate runs 15.3 percent on net business income above $400.
Filing deadlines matter. Corporations and partnerships typically file by March 15, 2026. Sole proprietors file with their personal returns by April 15, 2026. Extensions push these dates back but don't eliminate the requirement to pay estimated taxes on time.
NerdWallet recommends creating a filing checklist: business income documents, expense receipts, estimated tax payment records, deprec