# Small-Business Tax Rates Explained: A 2026 Guide
Small-business owners face a progressive tax system where the IRS divides business income into brackets and applies different rates to each segment. This structure means your tax bill doesn't jump to a single high rate once you cross an income threshold.
Here's how it works. If you operate as a sole proprietor, S-corporation, or partnership, your business income flows onto your personal tax return. The IRS then applies the 2026 federal income tax brackets, which range from 10% at the lowest tier to 37% at the highest. Your income gets taxed in stages, not all at once.
For example, a sole proprietor earning $100,000 doesn't pay 24% on the entire amount. Instead, the first portion gets taxed at 10%, the next segment at 12%, then higher rates apply progressively until reaching the 24% bracket. Only income within the highest bracket you reach gets taxed at that top rate.
C-corporations follow different rules. They pay a flat 21% federal corporate tax rate on profits. This applies regardless of income level, removing the bracket complexity that individual business owners navigate.
Self-employed individuals add another layer: self-employment tax. This covers Social Security and Medicare contributions at roughly 15.3% on net business income above $400. This amount sits on top of regular income tax.
State and local taxes vary widely. Owners in states like California, New York, and New Jersey face additional state income taxes that can exceed 10%, while those in Florida, Texas, and Nevada pay no state income tax at all.
The bracket thresholds shift annually for inflation. For 2026, exact figures will update, so checking the IRS website before filing remains essential. Business structure matters too. An LLC taxed as an S-corporation may generate