FINANCIAL CALCULATORS
Poupar e Viver: Brazilian Fixed-Income Calculators and Investment Education
Project overview
Poupar e Viver is a Portuguese-language financial utility platform built for users in Brazil. The project focuses on making common fixed-income calculations easier to understand by combining practical calculators with clear assumptions, tax treatment and methodology.
Instead of presenting investment returns as a black box, the interface shows the inputs behind each simulation and gives users context around the result. The initial product is centered on Brazilian fixed-income instruments such as CDB, CDI, LCI and LCA.
Transparent fixed-income calculators
The core of the project is a set of purpose-built calculators for Brazilian fixed-income scenarios. Users can simulate CDB returns, work with CDI-based rates, evaluate LCI and LCA investments, and compare alternatives using assumptions that are visible on the page.
The calculators are designed as educational tools rather than investment recommendations. Where relevant, the results account for Brazilian taxation rules and explain the premises used in the calculation.
Related calculators:
Built for Brazilian financial context
Poupar e Viver is intentionally localized for Brazil. The public interface uses Brazilian Portuguese, Brazilian currency formatting and terminology familiar to local investors. CDB, CDI, LCI and LCA are presented in the context in which Brazilian users actually encounter them.
The project also emphasizes source transparency. Reference rates, methodology and tax assumptions are exposed rather than hidden, helping users understand why a simulation produces a particular result.
Content and historical continuity
Alongside the calculators, the site includes educational material about fixed-income products and personal finance. The project also restores useful financial topics that historically existed on the Poupar e Viver domain, while updating the material for the current product and avoiding unsupported claims of authorship continuity.
One example is the guide to CDB investments, which explains how CDBs work, how CDI-linked and fixed-rate returns differ, and how taxes and deposit protection affect the final result.
Product principles
The product is designed around a few simple principles: clear assumptions, practical calculations, mobile-friendly interfaces, educational framing and visible methodology. The goal is not to tell users what to buy, but to give them better tools for understanding common fixed-income scenarios.
Visit the project
Poupar e Viver is live and available in Portuguese for users in Brazil.
Official website: Poupar e Viver
