Avoid the three biggest tax mistakes freelancers make. Calculate quarterly estimated payments. Find the S-Corp break-even. Maximize retirement contributions across all self-employed plan options. 2026 IRS parameters throughout.
The most common first-year freelance mistake is skipping estimated payments and receiving a penalty plus an unexpected tax bill in April. This tool calculates quarterly payments covering federal income tax (2026 brackets), SE tax (15.3% × 0.9235 × net income, SS capped at $184,500), and state using simplified rate buckets. Shows all four 2026 due dates (Apr 15 / Jun 16 / Sep 15 / Jan 15) and the safe-harbor amount from prior year federal tax. The per-quarter breakdown helps you calendar the payments.
Open Freelance Quarterly Estimated Tax Calculator →S-Corp election saves SE tax by splitting income into salary (SE tax applies) and distributions (no SE tax). But it requires paying yourself a reasonable salary, maintaining payroll, and filing a separate corporate return — typically $1,500–$4,000/year in overhead. This tool sweeps income from $30k to $1M in $500 steps to find the exact net SE income where your SE tax savings exceed annual admin overhead. Above that break-even, every additional dollar saves ~7.65 cents in SE tax. The crossover chart makes the decision visual.
Open S-Corp Election Break-Even Modeler →Self-employed retirement accounts offer the highest contribution limits of any plan type — but the winner depends on your income level and age. The optimizer compares max contributions across Solo 401(k) (employee deferral $24,500 + employer 25% of net comp, capped at §415(c) $72,000), SEP-IRA (25% of net comp, max $72,000), and SIMPLE IRA ($17,000 base). Catch-up rules: age 50-59 and 64+: Solo $8,000 / SIMPLE $5,000; age 60-63: Solo $11,250 / SIMPLE $5,250. At income levels below ~$100k, Solo 401(k) wins almost universally due to the flat employee deferral floor.
Open Solo 401(k) vs. SEP-IRA Optimizer →