Eight calculators and diagnostics built on official 2026 figures —Annex 8 tax brackets, UMA, IMSS contributions, LIF rates— plus two utilities to lock down your PDF documents: ten tools that never store your data or ask for sign-up. They are the first step of the Strategium method: size it up before you decide.
RESICO (simplified regime) vs. business activity/professional fees vs. salary-assimilated: same income, three very different income-tax bills — with official 2026 brackets and the annual difference in pesos.
Open tool →The only one with all three layers: the 700,000-UDIS exemption for a primary residence, deductions under art. 121, and the 5% state cedular tax where it applies. In many scenarios the correct result is zero.
Open tool →What actually lands in your account when you invoice professional fees or rental income to a legal entity: subtotal, VAT, income-tax withholding (10% or 1.25% RESICO) and 2/3 of the VAT, to the cent.
Open tool →The real cost of regularizing an omission at 2.07% per month (2026 rate) — and the incentive window that can wipe out fines and surcharges entirely this year.
Open tool →A full breakdown under the Federal Labor Law (LFT): prorated amounts, seniority premium, and severance of 3 months plus 20 days per year. For workers and for employers costing out a departure.
Open tool →From net salary to full employer cost: income tax, IMSS, RCV (retirement), Infonavit and the payroll tax (ISN) of all 32 states. The number every business owner thinks they know and almost always underestimates.
Open tool →Full or prorated by hire date, with the current vacation table and the income-tax-exempt portions (30 and 15 UMA).
Open tool →10 questions about what an audit pulls first — fecha cierta (the certain-date requirement), 69-B, substance, discrepancy — with an instant traffic-light result and the guide to close each gap.
Open tool →Stamp a "for the exclusive use of [name]" mark on any PDF to discourage forwarding and trace leaks. Runs 100% in your browser — the file is never uploaded to a server.
Open tool →Turn every PDF page into an image so the text is no longer selectable and the watermarks can no longer be removed. 100% in your browser, without uploading the file.
Open tool →Branded downloadable templates (loan agreement, promissory note, services with materiality, checklists), a subscribable 2026–2030 tax calendar, legislation, SAT validators, indicators and every official portal — each with its guide.
Explore resources →Each tool gives you the magnitude of your case in two minutes. Designing the solution — regime, structure, documentation, timing — is a diagnostic session. Grab the downloadable templates and the 2026–2030 tax calendar too.
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