Nine production-grade calculators that run entirely in your browser. Quarterly liability, 1099 vs W-2 take-home, real freelance rate, S-Corp readiness, deadline countdown. No login. No fees. No data collected. Built for Americans who work for themselves.
Tell us your weekly take-home and filing status. We model federal income tax, self-employment tax, state tax, and the safe-harbor cushion. Output is a per-deposit save rate plus your next quarterly payment estimate. Browser-side; no signup; no data leaves your device.
Every instrument is built to the same six rules. IRS-aligned formulas, 2026-bracket-current, browser-side only. Each tool's source-data dates live in its footer.
Live countdown to your next quarterly payment, IRS-aligned underpayment penalty calculator, and direct payment links.
Find out exactly how much to save from every payment so tax season never catches you off guard. Federal + SE + state.
Side-by-side take-home, real hourly rates after benefits replacement, and the break-even 1099 rate for your situation.
Enter all income sources (freelance, gig, resale, crypto, W-2) and see your total tax picture in one chart.
Enter your target take-home. Get the exact hourly rate after taxes, insurance, PTO, overhead, and benefits replacement.
Real savings after compliance costs. S-Corp readiness check with honest break-even analysis at $40K / $60K / $100K profit.
Cross-platform fees plus tax layer. eBay, Poshmark, Mercari, Etsy, Amazon compared side-by-side. Batch mode.
Enter your profit and see, in dollars, what skipping the S-corp election, a retirement shelter, the home office and the health-insurance write-off is likely costing you.
Turn a 1099 hourly rate into the W-2 salary it is really worth after both halves of SE tax and self-funded health insurance.
Self-employment and home-office tax differs across all 50 states. We map every one, track the 1099-K reporting thresholds, and publish the underlying data openly under The CeoCult Self-Employed Tax Audit.
State-by-state home-office deduction rules, federal conformity, and add-backs for every US state.
The reporting threshold for marketplace and payment-app income in every state, current for 2026.
Our open CC-BY dataset, the data layer behind The CeoCult Self-Employed Tax Audit. Cite it, download it, build on it.
Most online tax tools either lock results behind email gates or quietly assume IRS rules from two years ago. We don't. Every calculator on CeoCult follows the same six build rules, source-data dates listed in each tool footer.
No "consult your tax professional" hedging. Where pro advice is genuinely needed, we name the threshold.
Pub 505, Pub 587, Form 1040-ES baselines. We cite the publication number in every tool footer.
Indexed to current-year inflation adjustments. Rev. Proc. 2024-40 + state-specific brackets cross-referenced.
Your inputs never leave your device. No analytics on tool pages. No server-side calculation. Auditable JS.
Every instrument ships responsive + touch-friendly. Real iOS + Android device passes before publish.
110% prior-year + 90% current-year rules baked in. Underpayment penalty avoidance is a default, not an upsell.
10 guides · Schedule C, 1099, S-Corp, quarterlies
Retirement1 guide · Solo 401(k) vs SEP IRA
Insurance1 guide · Marketplace + premium tax credit
Banking1 guide · Business accounts for freelancers
Gig Platforms3 guides · Uber, TikTok creator, reseller
State Rules50 guides · per-state deduction rules
Due dates, how to calculate what you owe, how to pay, and what happens if you miss. The one guide every 1099 worker needs. 12 minutes, plain English, with the IRS publication references.
The full deduction inventory. Home office, mileage, health insurance, retirement, equipment, education, software. With Schedule C line numbers.
Contribution limits, paperwork burden, Roth options, when each wins. With the income thresholds where the SEP catches up.
Per-state rules on the home-office deduction, the simplified $5/sqft method vs actual expenses, and where state law diverges from federal.
Who has to file, how to fill out each line, and where freelancers most often trip up on the form.
Marketplace plans, premium tax credit, COBRA, association plans. With break-even income tables.
Creator Fund, brand deals, livestream gifts, affiliate income. What's 1099-K vs 1099-NEC and how to track it.
Every tool and dispatch on CeoCult is written by someone who has actually filed the return it describes, then checked against current IRS publications before publication. CeoCult is not a CPA firm; the instruments and guides are educational and do not substitute for personalized professional advice on complex situations.
Builds the calculator engines + writes the formula documentation. Source-verifies every IRS rule against Pub 505, Pub 587, and Form 1040-ES instructions before publish.
Every formula source-verified against current IRS publications and form instructions. Quarterly safe-harbor math, home-office deduction methods, and S-Corp election thresholds all traced to the named IRS document.
State threshold tables and reciprocity rules sourced from each state's revenue department, cross-checked against 26 CFR for federal alignment. Multi-state nexus interpretations cite the relevant ruling.
Dated changes on CeoCult: new pages, status checks and the pages Microsoft Copilot cites most. This list is rebuilt weekly from those records; each card shows the date of its own event.