About

KnowPay is an independent informational website with country-specific calculators. Mexico is the first market. Peru, Colombia, Chile, Argentina and Spain have their own 2026 tools and do not reuse Mexican ISR or IMSS. The site helps people estimate net salary, VAT, wage tax, mortgages and related amounts using published rules.

KnowPay is not a government agency and is not SAT, IMSS, INFONAVIT, STPS, PROFEDET, CONASAMI, INEGI or any other public authority. It is not a law firm, accounting firm, payroll provider, bank or insurer. It does not claim a professional license and does not create a client relationship by your using the site.

Citing an official source means the calculator is based on that document. It does not mean the authority endorsed, certified or operates KnowPay.