Analysis & deep dives
Small business tax research
Longer-form analysis behind the calculators, the rules, rates, and edge cases that decide what self-employed people and small businesses actually owe, grounded in IRS and state sources.
Quarterly Estimated Tax Payments: Avoiding Underpayment Penalties
Underpayment penalties, safe-harbor thresholds, and optimal quarterly payment strategy for the self-employed.
Read analysis →Self-Employment Tax: A Complete Calculation Guide
How SECA works, the 15.3% rate, the deductible employer-half, the wage base, and ways to reduce the bill.
Read analysis →Small Business Tax Rates by State: A 50-State Comparison
Corporate rates, pass-through treatment, franchise and gross-receipts taxes compared across all 50 states.
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